Frédéric Joliot Institute for Life Sciences - On the same theme https://joliot.cea.fr/drf/joliot/en/Pages/news/Science/2020/Mambaquaretin-theranostic.aspx Website of the Frédéric-Joliot Institute of Life Sciences which includes 4 departments: I2BC, DMTS, NeuroSpin and Service hospitalier Frédéric Joliot (SHFJ). The teams are mainly located at the CEA Paris-Saclay center and at the Orsay hospital. en-US https://www.cea.frhttps://www-cea-fr.admsite.extra.cea.fr/Style%20Library/Themes/drf/instituts/images/logo-cea-joliot.png Frédéric Joliot Institute for Life Sciences - On the same theme https://joliot.cea.fr/drf/joliot/en Nanometric micelles for targeted delivery of a prodrug against atherosclerosis https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/Nanomicelles-targeted-delivery-prodrug-atherosclerosis.aspx Teams from SCBM and SIMoS (DMTS) have developed nano-micelles for the vectorization of an active principle which regulates cholesterol metabolism towards atherosclerotic lesions. Nanomedicine ; Diseases SIMOPRO Scientific result ; Article preclinic;animal models; Thu, 14 Mar 2024 11:00:00 GMT Improved diagnosis of acute hepatic porphyrias using mass spectrometry https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/Diagnosis-acute-hepatic-porphyrias-mass-spectrometry.aspx A collaborative study between SPI and a team from Hôpital Louis Mourier demonstrates the contribution of liquid chromatography coupled with mass spectrometry to the day-to-day analytical needs of a clinical laboratory. Application to the rapid quantification of biomarkers in acute hepatic porphyrias. Diagnosis ; Mass spectrometry ; Biomarkers SPI Scientific result ; Article Fri, 23 Feb 2024 11:00:00 GMT Functionalization of the B subunit of Shiga toxin as a vaccine tool https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/Functionalization-B-subunit-Shigatoxin-vaccine-tool.aspx Researchers at SIMoS (DMTS) describe the synthesis, engineering and evaluation of the properties of the B subunit of bacterial Shiga toxin (STxB), administered mucosally, as a vaccine tool. Their results confirm the value of using a synthetic STxB in an anti-tumor and anti-infectious vaccination strategy. Biotechnology ; Vaccine SIMOPRO Scientific result préclinique; Fri, 26 Jan 2024 11:00:00 GMT Validation of a new elasticity biomarker for biological tissue diagnosis https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/elasticity-biomarker-biological-tissue-diagnostics.aspx SHFJ researchers have validated the use of a new biomarker, the nonlinear shear modulus, to measure the elasticity of biological tissues, by comparing results obtained using echography with those obtained using MRI imaging and digital simulation. This biomarker is of particular interest for the diagnosis of certain breast cancers. Medical imaging ; MRI ; Diagnosis SHFJ Scientific result Wed, 24 Jan 2024 11:00:00 GMT Combiner des stratégies in silico et in vitro pour de meilleurs anticorps thérapeutiques : exemple avec des dérivés de l’adalimumab, un anti-TNF. https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/meilleurs-anticorps-therapeutiques-exemple-derives-adalimumab.aspx ​Des chercheurs du SIMoS montrent que la combinaison de deux approches in silico et in vitro permet de sélectionner des anticorps thérapeutiques dont la fonctionnalité est préservée tout en diminuant le risque qu’ils induisent une réponse immunitaire indésirable. Diagnosis and innovative treatment Researchers SIMOPRO Scientific result ; Article Thu, 18 Jan 2024 11:00:00 GMT Rapid genome replication during early vertebrate development: role of the Rif1 protein https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Rapid-genome-replication-role-of-Rif1-protein.aspx I2BC researchers show that the Rif1 protein restrains the replication program and the recruitment of replication initiation factors during early embryonic divisions in X laevis. A step towards elucidating the molecular mechanisms involved in diseases resulting from Rif1 mutations in humans Molecular mechanisms ; DNA SBIGEM Scientific result ; Article Thu, 21 Dec 2023 11:00:00 GMT Phytic acid: a small molecule that helps repair DNA breaks https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/phytic-acid-DNA-repair.aspx In an article published in the journal Nucleic Acids Research, scientists from the I2BC, lPBS and the Institute for Structural and Chemical Biology (University of Leicester, UK) demonstrate how phytic acid, a product of cellular metabolism, stabilises the assembly of a complex enabling the repair of DNA breaks in humans. DNA ; Structural biology Researchers SB2SM Scientific result ; Article Mon, 04 Dec 2023 11:00:00 GMT Cardiac transplantation: better graft eligibility criteria thanks to metabolomics? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Cardiac-Transplantation--metabolomics.aspx In a study conducted by a team from the Marie Lannelongue Hospital, SPI researchers have established a difference between the metabolomic profiles of heart grafts harvested from pigs in a state of encephalic death or dead after controlled circulatory arrest. This work contributes to the exploration and validation of the use of hearts taken from people who have died after controlled circulatory arrest as a new source of grafts. Large-scale biology ; Diagnosis and innovative treatment Researchers SPI Scientific result ; Article preclinical studies; Wed, 15 Nov 2023 11:00:00 GMT Chimie : passer par le radical anion du CO2 pour le radiomarquage de médicament est possible https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Radical-anion-CO2-radiomarquage.aspx Des chercheurs de l'institut montrent qu’une stratégie fondée sur la formation du radical anion CO2●- marqué au carbone 14 ou carbone 11 s’avère payante pour radiomarquer en conditions douces des médicaments. Chemistry ; Diagnosis and innovative treatment Researchers SHFJ Scientific result ; Article préclinique; Tue, 24 Oct 2023 10:00:00 GMT Impact of metabolic variations on PET imaging of neuroinflammation in humans https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Impact-metabolism-PET-imaging-neuroinflammation.aspx Researchers at BioMaps evaluated the effect of several factors on the distribution of [18F]DPA-714 in 201 subjects who participated in SHFJ PET imaging protocols to better understand the role of neuroinflammation in various neurological diseases. They conclude that measures of individual metabolism are important in image interpretation. Positron Emission Tomography ; Medical imaging ; Pharmacology SHFJ Scientific result Thu, 12 Oct 2023 10:00:00 GMT Autophagy, a cellular self-defense mechanism, is involved in protecting cells against ricin https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Autophagy-involved-protecting-cells-against-ricin.aspx A team from SIMoS and SCBM, in collaboration with researchers from I2BC, has shown that autophagic degradation is at work when mammalian cells are poisoned by ricin. Stimulating this process could provide additional protection against this deadly toxin. CBRN-E threats ; Cellular mechanisms SCBM Scientific result ; Article Thu, 28 Sep 2023 10:00:00 GMT Multiplier les chimères pour mieux comprendre les interactions inhibiteur-cible protéique https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Multiplier-chimeres-mieux-comprendre-interactions-inhibiteur-cible-proteique.aspx En substituant des segments d’hélice alpha​ par des segments d’oligo-urées dans un peptide inhibiteur d’ASF1, lui conférant ainsi une résistance accrue aux protéases, des chercheurs de l’I2BC en collaboration avec l’IECB explorent les modes de liaison de ces chimères peptide-urée à leur cible. Molecular mechanisms ; Structural biology Researchers SB2SM Scientific result ; Article Tue, 12 Sep 2023 10:00:00 GMT A new role for the Mediator of transcription in chromatin organization at gene promoter regions https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/New-role-Mediator-transcription-chromatin-organization.aspx A team from I2BC has shown that the Mediator of transcription from the yeast S.cerevisiae physically interacts with the chromatin remodeling complex, and that by co-localizing with this complex on DNA promoter regions, it contributes to chromatin organization favorable to transcription initiation. Health & life sciences ; DNA ; Molecular mechanisms SBIGEM Scientific result Mon, 24 Jul 2023 10:00:00 GMT Agir sur les protéines pour limiter la dispersion des microplastiques dans l’eau ? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/proteines-dispersion-microplastiques-dans-eau.aspx Des chercheurs de l’I2BC ont contribué à une étude menée par l’Iramis qui dévoile le rôle des protéines dans la dispersion des microplastiques dans l’eau. Leurs résultats permettent d’imaginer de nouvelles stratégies low tech pour débarrasser l’eau de cette pollution. Impacts on living (organisms) ; Molecular mechanisms ; Remediation Researchers SB2SM Scientific result surfactant;polypropylène;polyéthylène; Wed, 12 Jul 2023 10:00:00 GMT Hypertension: an animal toxin active on angiotensin II receptors https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/HTA-toxine-animale-recepteur-angiotensine-II.aspx SIMoS researchers have identified and characterised an animal toxin (A-CTX-Mila) as a ligand for angiotensin II receptors, which are involved in one of the signalling pathways targeted by antihypertensive drugs. A tool of choice for studying the cellular mechanisms controlled by these receptors. Molecular mechanisms ; Diseases Researchers SIMOPRO Scientific result Fri, 16 Jun 2023 10:00:00 GMT DNA repair machinery more flexible thanks to PAXX? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Reparation-ADN-PAXX.aspx An international collaboration led by researchers from I2BC/CEA-Joliot and IPBS (Toulouse) has solved the atomic structure of molecular assemblies involved in the repair of DNA double-strand breaks. The diversity of assemblies involving the PAXX protein identified in this study highlights the great flexibility of the repair machinery, which could reflect its ability to adapt to biological conditions. The results were published in Science Advances. Structural biology ; Molecular mechanisms Researchers SB2SM Scientific result cryoEM;radiocristallographie; Tue, 06 Jun 2023 10:00:00 GMT Radiomarquage du crizotinib au fluor-18 : un nouvel outil pour suivre par TEP la biodistribution de ce médicament https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Radiomarquage-crizotinib-fluor-18-nouvel-outil-TEP.aspx Des chercheurs du SHFJ ont mis au point la radiosynthèse au fluor-18 du crizotinib, un médicament qui ne pénètre pas dans le cerveau. Ce nouvel outil pour l’imagerie TEP permettra d’explorer de futures stratégies visant à faire passer la barrière hémato-encéphalique à ce médicament pour traiter certaines métastases cérébrales. Positron Emission Tomography ; Cancer ; Diagnosis and innovative treatment Researchers SHFJ Scientific result ; Article Thu, 27 Apr 2023 10:00:00 GMT Combining neuroanatomical markers to strengthen the diagnosis of fetal alcohol spectrum disorder https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Structuring-neuroanatomical-criteria-fetal-alcohol-spectrum-disorder.aspx By analyzing brain imaging data, researchers from InDEV (NeuroSpin / UMR NeuroDiderot) have identified recurrent abnormalities in subjects with fetal alcohol syndrome, the combination of which could have a particularly interesting diagnostic value for non-syndromic forms of fetal alcohol spectrum disorders. MRI ; Diagnosis and innovative treatment Researchers Scientific result Mon, 13 Mar 2023 11:00:00 GMT Platinum nanoparticles to improve radiotherapy ? PET imaging provides answers https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Nanoparticles-to-improve-radiotherapy.aspx Researchers from the SHFJ laboratory at ISMO have demonstrated the value of platinum nanoparticles as potential radiosensitizing agents for radiation therapy. Diagnosis and innovative treatment ; Positron Emission Tomography Researchers SHFJ Scientific result Radiotherapy;biodistribution;platinum nanoparticles; Tue, 21 Feb 2023 11:00:00 GMT Development of a new radiolabeling strategy in immunoPET for precision imaging https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/New-radiolabeling-strategy-immunoTEP.aspx Researchers from the BioMaps laboratory (SHFJ) and the Molecular Engineering for Health Service (SIMoS, DMTS) developed an enzymatic approach for radiofluorination of an anti-PD-L1 Fab and compared its in vivo properties to the same Fab stochastically labeled by two conventional methods. Diagnosis and innovative treatment ; Positron Emission Tomography Researchers SHFJ Scientific result PD-L1;radiomarquage;lipoate-protéine ligase;radiofluoration; Tue, 21 Feb 2023 11:00:00 GMT Glioblastoma: Does focused ultrasound increase the therapeutic efficacy of cetuximab? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Glioblastoma-FUS-cetuximab.aspx Researchers from the SHFJ, in collaboration with NeuroSpin, show that the use of focused ultrasound does not increase the therapeutic effects of cetuximab on glioblastoma although the opening of the blood-brain barrier is transiently effective. Positron Emission Tomography ; Diagnosis and innovative treatment Researchers Neurospin Scientific result Wed, 15 Feb 2023 11:00:00 GMT From a marine toxin to a melanocortin receptor antagonist, a therapeutic target for energy metabolism disorders https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Cone-marine-toxin-melanocortin-receptor-antagonist.aspx A SIMoS team discovered a toxin in the venom of a marine cone that it engineers into a high affinity antagonistic peptide for the melanocortin receptor, a major regulator of energy homeostasis. A step towards the development of innovative treatments for certain eating disorders Pharmacology ; High-throughput screening ; Proteomics ; Transcriptomics SIMOPRO Scientific result Thu, 09 Feb 2023 11:00:00 GMT Numerical simulation provides information on the restriction of BAF protein dynamics by phosphorylation https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/BAF-numerical-simulation-phosphorylation.aspx Using molecular dynamics simulation and NMR studies, I2BC researchers detail the restriction mechanisms of BAF protein dynamics due to its phosphorylation. Molecular mechanisms ; Structural biology ; Simulation & modelling Researchers SB2SM Scientific result Mon, 16 Jan 2023 11:00:00 GMT A mathematical model applicable to nuclear processes at the genome scale, and at very high spatial resolution https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Mathematical-model-repair-genome.aspx The protocols applied for in vivo mapping of nuclear processes, at the genome scale and at very high spatial resolution, do not allow for high temporal resolution. A team from the I2BC has therefore demonstrated that such an understanding could be wrong by using a mathematical model. This model can be applied to any process that can be modeled by a transition between two states. DNA ; Cellular mechanisms Researchers IBITECS Scientific result XR-seq;réparation de l’ADN;NER; Tue, 13 Dec 2022 11:00:00 GMT The insertion of iron initiating the biosynthesis of Fe-S centers is a conserved process https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Iron-insertion-initiating-biosynthesis-Fe-S-centers.aspx A team from SBIGeM (I2BC) shows, by several spectroscopic approaches, that the assembly of a Fe-S cluster, the catalytic center of many essential proteins, is a highly conserved process, initiated by the insertion of ferrous iron at the cysteine-rich assembly site of the scaffold protein ISCU (Iron-sulfur cluster assembly enzyme). Health & life sciences ; Fundamental Research ; Cellular mechanisms SBIGEM Scientific result Fri, 09 Dec 2022 11:00:00 GMT Detection of monkeypox: Mass spectrometry proves once again its effectiveness https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Detection-monkeypox-massspectrometry.aspx A Li2D team has released the peptidomic profile of the virus that causes monkeypox, which they established using tandem mass spectrometry. These data should help to better understand the evolution of the epidemic and allow the creation of targeted tests to potentially detect the threat more quickly and prevent a new epidemic. Diagnosis ; Infectious diseases Researchers SPI Scientific result Mon, 28 Nov 2022 11:00:00 GMT The Mediator of transcription at the heart of gene expression regulation and DNA repair https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Mediator-transcription-gene-expression-regulation-DNA-repair.aspx An I2BC team has analyzed, at the genome scale of the yeast S.cerevisiae, the functional interactions between the Mediator of gene transcription and DNA repair proteins, reinforcing the idea that these two fundamental cellular processes are closely linked. Molecular mechanisms ; Cellular mechanisms ; DNA SBIGEM Scientific result Mon, 26 Sep 2022 10:00:00 GMT Dual labeling and digital imaging for the evaluation of protein-drug conjugates in preclinical models https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/In-vivo-evaluation-antibody-drug-conjugate.aspx A team from SIMoS, in collaboration with the SCBM (DMTS), has developed an original bioanalytical approach based on the double 14C-3H isotopic labeling of an antibody-drug conjugate, allowing the simultaneous in vivo monitoring of the two components in mouse models as well as their precise quantification in the organs. Pharmacology ; Cell and molecular imaging SIMOPRO Scientific result Mon, 22 Aug 2022 10:00:00 GMT Fight against antibiotic resistance: two additional rapid lateral flow immuno-assays https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/antibioresistance-2-nouveaux-tests.aspx Researchers at the LERI together with the AP-HP have developed 2 rapid and inexpensive immunological tests to detect antibiotic resistance. The novelty: the tests detect the activity of bacterial enzymes that hydrolyze extended-spectrum cephalosporins. Antibiotics ; Diagnosis Researchers SPI Scientific result penicillin;carbapenemase;CTX-M; Tue, 02 Aug 2022 10:00:00 GMT Towards understanding the mechanisms responsible for intrahepatic cholestasis: biochemical and structural study of the human ATPase ATP8B1 https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Intrahepatic-cholestasis-biochemistry-structure-ATP8B1.aspx A collaborative study involving an I2BC team unveils the mechanism of autoinhibition of the human flippase ATP8B1, as well as its regulation by lipids and phosphorylation. The study provides a better understanding of the impact of flippase mutations responsible for intrahepatic cholestasis on its enzymatic activity. Molecular mechanisms ; Structural biology Researchers SB2SM Scientific result ATP;hydrolyse;protéine membranaire;modifications post-traductionnelles;expression hétérologue;membranes;cryo-EM; Thu, 09 Jun 2022 10:00:00 GMT Food allergies: the sensitization route influences the immune response https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Food-allergies-sensitization-route-influences-immune-response.aspx Researchers at the LIAA (SPI/DMTS) show that the initial route of sensitization to a food allergen (oral, respiratory, cutaneous) directly influences the nature of immune responses at multiple sites in the body. Allergies ; Cellular mechanisms Researchers SPI Scientific result cellular immune responses;food allergy;BABL/c mice; Mon, 25 Apr 2022 10:00:00 GMT Facilitating access to deuterated and tritiated molecules: towards more diversity! https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Deuterated-tritiated-molecules-more-dversity.aspx Researchers from the SCBM describe a hydrogen isotope labeling process that is easy to implement and whose starting point is a "simple" mixture, in a solvent, of the product to be labeled with a pre-catalyst. Explanations of this process which finds applications in many fields including drug development or medical imaging. Chemistry ; Diagnosis and innovative treatment ; Medical imaging Researchers SCBM Scientific result marquage isotopique;biomolécule;activation C-H;ADME-DMPK; Wed, 06 Apr 2022 10:00:00 GMT Buprenorphine/benzodiazepine interaction: why is it more dangerous? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Interaction-buprenorphine-benzodiazepine.aspx ​A collaboration between the SHFJ and the UMR-S 1144 (University of Paris) shows that the deleterious effect of the buprenorphine/benzodiazepine combination would result from the combined action of each drug on its target. Diagnosis and innovative treatment ; Pharmacology Researchers SHFJ Scientific result ; Article pharmacodynamics;opioids; Fri, 25 Mar 2022 11:00:00 GMT Inhibiting autophagy: a new line to fight cellular senescence? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Autophagy-senescence.aspx Researchers from the Frédéric Joliot Institute have identified ouabain and chloroquine as two selective senolytic molecules that are effective in eliminating certain senescent cells. The study has been published in the journal Aging Cell. Cancer ; Cellular mechanisms Researchers SCBM Scientific result Tue, 15 Mar 2022 11:00:00 GMT In silico modelling unveils mechanisms of coordination between pairing and crossovers during meiosis https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Modeling-pairing-crossover-meiosis.aspx In a study conducted by a team from the Institut Curie, researchers from the CEA-Joliot (B3S/I2BC department) have modeled in silico protein-protein interactions and thus contributed to establish at the molecular level the mechanisms that coordinate the pairing and recombination of homologous chromosomes during meiosis. Simulation & modelling ; Structural biology ; Molecular mechanisms Researchers SB2SM Article ; Scientific result recombinaison homologue;AlphaFold;crossing-over;InterEvDock3; Thu, 13 Jan 2022 11:00:00 GMT Deeptope: accelerating the development of therapeutic antibodies via high-throughput functional tests https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2021/Deeptope-start-up-Simos.aspx Deeptope, founded in February 2021 from a technology developed at the DMTS Laboratory of Cellular Immunology and Biotechnology (LICB), is a company of therapeutic antibody engineering that provides antibody optimization and characterization services to biotech or pharmaceutical firms with the goal of increasing the quality of antibodies in a very short timeframe. Biotechnology ; Pharmacology News ; Article Mon, 29 Nov 2021 11:00:00 GMT Senescence and chromatin: new biomarkers? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/senescence_biomarkers_chromatin.aspx Researchers from the DMTS and I2BC depatments of the Joliot Institute's " identify three potential new biomarkers of senescent cells containing persistent DNA damage. Molecular mechanisms Researchers SBIGEM Scientific result Wed, 17 Nov 2021 11:00:00 GMT Plants - Dissipating excess absorbed light energy as heat to protect themselves: light on molecular mechanisms https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Plants-dissipation-exces-energy.aspx In a study published in JBC, a team from I2BC/CEA-Joliot, in collaboration with the Beijing Botanical Institute (China), describes for the first time an intermediate state of the light-harvesting antenna of higher plants that provides a better understanding of the changes that take place at the molecular level during the activation of a plant's photoprotection mechanism. Photosynthesis ; Molecular mechanisms Researchers SB2SM Scientific result Raman analyzer; Mon, 05 Jul 2021 10:00:00 GMT A small RNA regulates photoprotection in cyanobacteria https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Small-RNA-regulates-photoprotection-cyanobacteria.aspx A team of the I2BC (LMB/SB2SM), in collaboration with the Institute of Biology (Freiburg University), discovered a posttranscriptional regulatory mechanism linking the expression of the cyanobacterial Orange Carotenoid Protein, related to photoprotection, directly and in an inverse fashion, to the synthesis of the light collector complexes (phycobilisomes), via a 3’ end-derived small RNA. Photosynthesis ; Microalgae ; Molecular mechanisms Scientific result Wed, 23 Jun 2021 10:00:00 GMT Accelerating mutation accumulation studies with microfluidics https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/accumulation-mutations-microfluidique.aspx Teams from CEA-Iramis and CEA-Joliot (team "Genome transcriptional regulation /I2BC) have joined forces to develop and validate an innovative microfluidic-based system that automatizes cell culture over many generations. It enables with considerable time savings large-scale experiments to be carried out, which are essential for understanding the cellular mechanisms involved in DNA mutation events. DNA ; Cellular mechanisms Researchers Iramis Scientific result Fri, 11 Jun 2021 10:00:00 GMT Characteristics of the initial symptoms of Alzheimer's disease in young patients https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Initial-symptoms-Alzheimer-disease-in-young.aspx Researchers from BioMaps (SHFJ) and the Department of Memory and Language Neurology (Ste Anne's Hospital) studied the early clinical signs of Alzheimer's disease (AD) reported by young patients (< 62 years old) compared to those reported in classic AD of the elderly (> 65 years old). They show that these signs are misleading and often appear in the professional context. Alzheimer's disease ; Diagnosis ; Brain Scientific result Thu, 10 Jun 2021 10:00:00 GMT Evaluation of the immunogenicity of peptide-drugs containing non-natural modifications https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Immunogenicity-therapeutic-peptides.aspx A team from SIMoS (DMTS) in collaboration with Sanofi shows that the introduction of non-natural sequences into an immunogenic peptide attenuates the immune response against this peptide, an approach that could guide the design of less immunogenic, and therefore more effective, therapeutic peptides. Health & life sciences ; Pharmacology Scientific result Tue, 01 Jun 2021 10:00:00 GMT PET imaging reveals the neuropharmacology of buprenorphine https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/PETimaging-neuropharmacology-buprenorphine.aspx Researchers at BioMaps (SHFJ) have succeeded in determining the interaction dynamics of buprenorphine, an opioid drug with a particularly complex pharmacology, with its brain receptors in vivo. To do so, they developed an original PET imaging approach based on the use of the radiolabeled molecule (11C-buprenorphine). Brain ; Positron Emission Tomography ; Pharmacology Scientific result Wed, 05 May 2021 10:00:00 GMT How works Mambalgin-1, an analgesic peptide from black mamba venom https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/How-works-Mambalgin-1.aspx Teams from IPMC and SIMoS (DMTS) defined the molecular determinants of the interaction between Mambalgin-1, an analgesic peptide isolated from black mamba venom, and its target, ASIC1 (Acid-Sensing Ion Channels), to model, using molecular dynamics, this complex. The resulting model provides clues to develop blockers of ASIC1, interesting targets for clinical pain relief applications. Pharmacology Scientific result Thu, 08 Apr 2021 10:00:00 GMT Phosphorylation of BAF alters its dynamics and interaction with DNA but not its contacts with the nuclear envelope https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/phosphorylation-BAF-interaction.aspx ​A study by researchers from I2BC department shows in vitro the effect of mitotic phosphorylation of the BAF protein on its structure and its interactions with DNA and lamina and unveils consequences on genome organization and on mechanisms responsible for progeroid syndromes. Molecular mechanisms ; DNA ; Structural biology Researchers SB2SM Scientific result NMR;radiocristallography; Mon, 29 Mar 2021 10:00:00 GMT Salmonellosis and shigellosis: a monoclonal antibody induces cross-protection https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Salmonellosis-shigellosis-monoclonal-Ab-cross-protection.aspx Researchers at CEA-Joliot (SPI unit in collaboration with SIMoS unit) have developed a monoclonal antibody directed against a common region of two proteins of the bacteria Shigella and Salmonella and capable of inducing cross-protection against infections caused by these bacteria. Bacteria ; Vaccine Researchers SIMOPRO Scientific result Antibody;IpaD-318;host cell;injectiosome; Thu, 25 Mar 2021 11:00:00 GMT Anti-cancer therapeutic strategy: a chimera to inhibit ASF1 https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Foldamer-inhibitor-ASF1.aspx I2BC researchers, in collaboration with the European Institute of Chemistry and Biology (University of Bordeaux, CNRS), have developed a chimeric peptide/foldamer molecule that is resistant to proteolysis and inhibits ASF1, a potential target for anticancer treatment. The resolution of the structure of this chimera in interaction with its target, the first of its kind, reveals an unsuspected plasticity of the urea-based backbone that hugs the surface of ASF1. Structural biology ; Molecular mechanisms ; Epigenetics ; Cancer Researchers SB2SM Scientific result NMR;radiocristallography; Fri, 19 Mar 2021 11:00:00 GMT Première étape vers un test quantitatif par spectrométrie de masse pour le diagnostic spécifique de la COVID-19 ? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Vers-test-quantitatif-MS-diagnostic-specifique-COVID-19.aspx Le LEMM, en collaboration avec le LI2D et l’AP-HP, développe un test de diagnostic spécifique de la Covid-19 par spectrométrie de masse qui permettrait aussi la quantification de la charge virale du patient. Objectif à terme : adapter la méthode pour la rendre plus sensible et compatible avec les équipements d’analyse des hôpitaux. Diagnosis ; Mass spectrometry ; Virus Researchers SPI Scientific result SARS-CoV-2; Tue, 09 Mar 2021 11:00:00 GMT Regulation of the Ca2+ ATPase by sarcolipin: a long-range effect https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Sarcolipin.aspx By combining molecular dynamics and in vitro experiments, researchers at the LPSM (I2BC) have revealed the mode of action of sarcolipin in regulating the activity of SERCA1a, responsible for muscle relaxation. Molecular mechanisms ; Fundamental Research Researchers Saclay Scientific result Fri, 05 Mar 2021 11:00:00 GMT A micellar probe for fluorine magnetic resonance tumor imaging https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Micellar-probe-fluorine-MRI-tumor.aspx A SCBM (DMTS) team, in collaboration with researchers at NeuroSpin and I2BC, is describing micellar nanometric vectors targeting tumors that have been imaged by fluorine magnetic resonance imaging (MRI). The observed 19F signal made it possible to precisely delimit the volume of the tumor zone in a mouse model and to quantify the probe accumulated in the target tissue. Chemistry ; Nanomedicine ; Cancer ; MRI Scientific result Thu, 04 Mar 2021 11:00:00 GMT Carbon labeling with light https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Carbon-labeling_light.aspx Researchers from the LMC (DMTS), in collaboration with a team from AstraZeneca, have developed a labeling method, based on the exchange of carbon dioxide, simply using visible blue light and a photocatalyst. Chemistry ; Biomarkers ; Diagnosis and innovative treatment Researchers SCBM Scientific result ; Europe radiolabeling; Wed, 24 Feb 2021 11:00:00 GMT Key role of SERCA protein residue E340 in the inter-domain communication necessary for calcium transport https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/E340-SERCA-communication.aspx A study led by Oxford University researchers and involving researchers from the Institut Joliot (I2BC) and the University of Århus reveals the crucial role of the E340 residue in the inter-domain communication of the calcium transporter SERCA. Molecular mechanisms Researchers SB2SM Scientific result fluorescence;mutagenesis;tryptophan; Fri, 15 Jan 2021 11:00:00 GMT Depression and gut microbiota: the endocannabinoid system makes the connection https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Depression-gut-microbiota.aspx A study led by the Institut Pasteur and involving CEA-Joliot has shown, in a mouse model, that a modification of the intestinal microbiota caused by chronic stress is accompanied by modifications of the metabolome which induce a defect in the signaling pathway for endogenous cannabinoids in the hippocampus, which may explain the mood disorders observed. Metabolomics ; Molecular mechanisms Researchers SPI Scientific result Microbiology;neural circuits; Tue, 15 Dec 2020 11:00:00 GMT Decompensated cirrhosis: involvement of amino acid metabolism in systemic inflammation https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Decompensated-cirrhosis-aa-metabolism.aspx A European study involving CEA-Joliot provides the first overview of the amino acids circulating in the blood of patients with decompensated cirrhosis and concludes that there is a strong redistribution of their metabolism in order to provide the fuel necessary for the intense inflammatory response. Diagnosis and innovative treatment Researchers SPI Europe spectrométrie de masse;métabolomique;métabolome;cirrhosis;liver failure; Mon, 14 Dec 2020 11:00:00 GMT World Antimicrobial Awareness Week: the Institute continues its actions https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/World_AMR_week_LERI.aspx The recent publication, in the journal Diagnostics, of a collaborative study associating AP-HP, NG-Biotech and a team from the Institute, is an opportunity to recall the Institute's commitment to the development of means of detecting antimicrobial resistance, a global phenomenon in the WHO's sights, as recalled by the World Antimicrobial Awareness Week. Antibiotics Researchers SPI Scientific result ; Article LFIA;bacteria;lateral flow immunoassay;gram negative; Thu, 19 Nov 2020 11:00:00 GMT Mambaquaretin: therapeutic and diagnostic interest? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Mambaquaretin-theranostic.aspx In pursuing their work on mambaquaretin, SIMoS researchers conducted a collaborative study confirming the therapeutic potential of the toxin and paving the way for its use as a diagnostic tool. Diagnosis and innovative treatment ; Molecular mechanisms ; Cellular mechanisms SIMOPRO Scientific result PET Scan;PK/PD; Tue, 10 Nov 2020 11:00:00 GMT Development of a general strategy for the isotopic labelling of carbamates by incorporation of CO2 https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/carbamates-CO2-isotope-labeling.aspx In a study published in Chemical Communications, the Joliot Institute Carbon labeling laboratory (LMC), in collaboration with the SHFJ, provides proof of concept of a "click" strategy for carbon isotope marking of pharmaceutical molecules containing carbamates. Chemistry ; Diagnosis and innovative treatment SCBM Scientific result ; Europe Thu, 10 Sep 2020 10:00:00 GMT Viral deubiquitylation: toning things down brings better control? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/DUB-virale-ubiquitin.aspx A study led by a team from the Institut Joliot (I2BC/B3S) reveals an unusual mode of interaction between a viral deubiquitinase and a ubiquitin, which appears to be optimized to finely control virus replication. Molecular mechanisms SB2SM Scientific result crystal structure;deubiquitinilation;viral protease; Tue, 08 Sep 2020 10:00:00 GMT SARS-CoV-2 detection: mass spectrometry shows its potential for rapidity. https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/SARS-CoV-2-detection-mass-spectrometry-rapidity.aspx A team from SPI in Marcoule detected by mass spectrometry, in 3 minutes and without specific reagents, signature peptides of the SARS-CoV-2 virus in clinical samples (nasopharyngeal swabs). It thus provides a proof of concept of the use of this method as a possible alternative to PCR, currently the reference method. Mass spectrometry ; Virus ; Biodetection ; Diagnosis Scientific result Thu, 06 Aug 2020 10:00:00 GMT Mapping of Ebola T-cell response: towards a new vaccine ? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Mapping-Ebola-T-cell-response.aspx SIMoS researchers, in collaboration with Genopole, Excellgene, Vaxeal holding SA (Switzerland), used a large-scale approach to map and characterize the response of CD4 T-cells from healthy donors, against two proteins from the Ebola-Zaire virus. They observed a strong response to the viral nucleoprotein (NP) and suggest that components of NP may be included in the design of new Ebola vaccines. Virus ; Vaccine Scientific result Wed, 24 Jun 2020 10:00:00 GMT Salmonellosis and shigellosis: first demonstration of cross-protection induced by virulence factors SipD and IpaD https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Salmonella-shigella-cross-protection.aspx SPI researchers show for the first time, in a mouse model, the induction of cross-protection against Salmonella and Shigella infections, two pathogenic bacteria responsible for gastrointestinal diseases (typhoid, dysentery among others), one of the main causes of morbidity and mortality in several regions of Africa and Asia. Vaccine ; Bacteria Scientific result Mon, 22 Jun 2020 10:00:00 GMT How the identification of attenuated forms of the SARS-CoV-2 virus could help to control the current epidemic ? https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2020/Identification-attenuated-covid-virus-variants.aspx An opinion article, published in Environmental Microbiology, and written by an international consortium initiated by three researchers of Joliot Institute, proposes an original way of research on Covid-19 through the identification by sequencing of attenuated variants of the SARS-CoV-2 virus in populations at risk with little or no symptoms. Virus ; Genomics ; Vaccine Tue, 12 May 2020 10:00:00 GMT Dynamic association of PTOX with thylakoids https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Dynamics-PTOX-thylakoides.aspx A collaboration led by I2BC researchers presents, in the Journal of Experimental Botany, a body of evidence for a dynamic association of the PTOX protein with thylakoid membranes, dependent on proton motive force. Bioenergy ; Molecular mechanisms SB2SM Scientific result photosystem;ATP; Sat, 02 May 2020 10:00:00 GMT BRCA2 and breast cancer: a new mechanism revealed? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/BRCA2-breast-cancer.aspx ​In a study conducted by a team from the Institut Curie, I2BC researchers have used their NMR know-how to study the phosphorylation of BRCA2 and have thus contributed to revealing a mechanism potentially at the origin of chromosomal aberrations observed in breast BRCA2-mutated tumors. Molecular mechanisms ; Cancer SB2SM Scientific result homologous recombination;Rad51;kinase; Mon, 27 Apr 2020 10:00:00 GMT A mobile laboratory to study the genetic material of extinct…or emerging species https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Mobile-laboratory-study-genetic-material-extinct-species.aspx A collaboration between researchers from I2BC@Saclay, the french Muséum National d'Histoire Naturelle and owners of prehistoric sites shows the possibility of using a mobile laboratory to quickly identify DNA of archaeological specimens. Evolution ; DNA Scientific result Wed, 08 Apr 2020 10:00:00 GMT From bacteria to Humans: characterization of a new player in tolerance to thermal and oxidative stress https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Characterization-new-player-tolerance-thermal-oxidative-stress.aspx Researchers from SB2SM (I2BC@Saclay) have shown for the first time in vivo in the model cyanobacterium Synechocystis that a cellular detoxification enzyme, the membrane glutathione-S-transferase (GST), maintained in part by evolution, plays a major role in resistance to thermal and oxidative stress, making this cellular model a valuable tool for the study of GSTs conserved from bacteria to plants, down to Humans. Photosynthesis ; Stress response Scientific result Tue, 18 Feb 2020 11:00:00 GMT Lassa fever: a vaccine soon to be tested. https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Lassa-fever-vaccine.aspx Researchers from Pasteur Institute, in collaboration with seven research teams, including SPI (LI2D/Marcoule), developed and evaluated the efficacy of several vaccine candidates against the virus responsible for Lassa haemorrhagic fever, endemic in Western Africa. They identified one of them as being the most effective, likely to quickly enter clinical trials in humans. Results are published in the journal Science Translational Medicine. Vaccine Scientific result Wed, 09 Oct 2019 10:00:00 GMT Formation of nanometric scrolls driven by electrostatic interactions between cationic peptides and anionic lipids https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Lanreotide-nanoscrolls.aspx By studying the self-assembly of a hormone-derived peptide in the presence of lipid membranes, a team of the SB2SM (Joliot Institute / I2BC) in collaboration with the University of Rennes 1 and Ipsen biopharmaceutical group, shows how the interactions electrostatic type modify the structures of the assemblies formed by each of these molecules alone in solution. Molecular mechanisms ; Cell and molecular imaging SB2SM Scientific result Mon, 23 Sep 2019 10:00:00 GMT Glucocorticoids: a better evaluation of their effects in specific cancers? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Glucocorticoids-better-evaluation-effect-cancers.aspx Senescence specialists (SBIGEM), in collaboration with the SCBM and the CNRGH (Jacob Institute), show that glucocorticoids can delay or even short-circuit it and disrupt its function as a tumor suppressor. Cellular mechanisms ; Molecular mechanisms ; Cancer Fontenay-aux-Roses Scientific result MEK/ERK;oncogenesis;Senescence; Mon, 09 Sep 2019 10:00:00 GMT Friedreich’s ataxia: a reliable in vitro model sheds light on physiological role of frataxin https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Friedreich-Ataxia-reliable-in-vitro-model-function-frataxin.aspx By improving the in vitro reconstitution of the iron-sulfur clusters biosynthesis machinery, a team from SBIGEM (CEA-Joliot / I2BC), with its French, German and Spanish collaborators, clarifies the function of frataxin, a protein involved in Friedreich’s ataxia. Molecular mechanisms SBIGEM Scientific result Frataxin;Mössbauer;circular dichroism; Fri, 06 Sep 2019 10:00:00 GMT How the transcriptional machinery recruits a DNA repair protein? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Transcription-and-DNA-repair.aspx Recent work by SBIGeM (I2BC@Saclay) highlights how two essential components of DNA transcription into RNA coordinate to recruit the Rad2/XPG DNA repair protein, thus linking these two fundamental cellular processes. Molecular mechanisms ; DNA Scientific result Thu, 22 Aug 2019 10:00:00 GMT Lipid transmembrane transport: very first structures are revealed! https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Drs2-Cdc50-CryoEM-Structure-Nature.aspx Researchers from I2BC@Saclay, the University of Aarhus and the Max Planck Institute of Biophysics in Frankfurt reveals the first cryo-EM high-resolution structures of one of the P4-ATPases. Study has been published in Nature. It give a better insight towards the understanding of the transport mechanisms of membrane lipids. A lipid pathway through the protein membrane domain is suggested. Structural biology ; Molecular mechanisms Saclay Press release ; Scientific result lipid asymetry;P4-ATPase;membrane lipid translocation; Thu, 27 Jun 2019 10:00:00 GMT How a “self” protein can be immunogenic? The example of relaxin, a human hormone https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Relaxin-immunogenic.aspx A collaboration between teams from SIMOPRO and Sanofi sheds new light on the origin of the immune responses developed by patients with scleroderma when treated by injection of relaxin, a therapeutic protein. The study was published in The Journal of Immunology. Autoimmune diseases ; Cellular mechanisms Saclay Tue, 18 Jun 2019 10:00:00 GMT A new generation of nanovectors for anticancer therapies. https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/New-nanovectors-anticancer-therapies.aspx As part of a collaboration with MIRCen (Jacob Institute), researchers of SCBM have developed functional micellar vectors that can effectively target tumors and whose therapeutic activity is intrinsically carried by the constitutive unit of the micelle. This combination leads to better drug load and avoids premature drug release. Chemistry ; Nanosciences ; Nanomedicine Scientific result Wed, 12 Jun 2019 10:00:00 GMT A promising therapeutic innovation for creatine transporter deficiency. https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/therapeutic-innovation-creatine-transporter-deficiency.aspx ​Two teams from JOLIOT (SPI / SCBM), in collaboration with the University of Cincinnati, confirm the interest of a drug candidate to treat the congenital creatine deficiency syndrome, a rare neurological childhood disease, responsible for developmental delays and intellectual disability. The results obtained in an animal model of the disease show that it is possible to administer, nasally, dodecyl creatine ester-loaded microspheres, thus improving the cognitive functions of treated animals. Genetic diseases ; Pharmacology Scientific result Fri, 17 May 2019 10:00:00 GMT « Click and Release » chemistry for the targeted delivery of drugs in vivo https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Click-Release-chemistry-targeted-delivery-drug-invivo.aspx A team from the SCBM, in collaboration with the SPI, the IC2MP and the University Hospital of Poitiers, has developed a bioorthogonal chemistry strategy that allows, in vivo, the controlled release of active ingredients contained in micelles-targeting cancerous tumors. These results pave the way for new strategies for targeted drug delivery. Chemistry ; Cancer ; Nanomedicine Scientific result Fri, 15 Mar 2019 11:00:00 GMT Pain: a promising toxin isolated from a spider venom https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/pain-promising-toxin-spider-venom.aspx A collaboration between SIMOPRO, Sanofi R & D, Smartox Laboratories and the Thorax Institute, has isolated a toxin with antinociceptive properties from a high-throughput electrophysiological screening of a collection of more than 100 venoms. Cyriotoxin-1a has been identified, sequenced, chemically synthesized and functionally characterized - from cell to organism in vivo. Pharmacology ; High-throughput screening SIMOPRO Scientific result antinociception;venoms;sodium channel;Pain; Mon, 11 Mar 2019 11:00:00 GMT European funding for better management of liver diseases https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2019/European-Funding-liver-diseases-microb-predict.aspx Europe is committed to better diagnostic and therapeutic management of patients with severe forms of cirrhosis. It finances the MICROB-PREDICT consortium, which aims to better understand the role of the human microbiome in the pathogenesis and evolution of cirrhosis. Final goal is to uture personalized therapeutic strategies and diagnostic tools. The SPI (Joliot Institute) is the main project lead for the CEA. Diagnosis and innovative treatment SPI Europe Europe;foie;consortium;métabolomique;lipidomique;cirrhose;MICROB-PREDICT; Fri, 01 Feb 2019 11:00:00 GMT Physicists and pharmacologists join forces to better understand the biology of the blood-brain barrier. https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/Physicist-pharmacologists-to-better-understand-BBB.aspx Thanks to complementary imaging techniques, researchers from the SHFJ and NeuroSpin have shown that the physical blood-brain barrier (BBB) disruption is not necessarly enough to deliver some drugs into the brain, especially when there are recognized and supported by efflux transporters. Medical imaging ; MRI ; Positron Emission Tomography ; Cellular mechanisms SHFJ News Thu, 20 Dec 2018 11:00:00 GMT New function discovered for the protein Rad52, a serious therapeutic target in breast cancer https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/New-function-discovered-protein-Rad52-serious-therapeutic-target-breast-cancer.aspx Rad52 has garnered great attention lately as a promising target in the battle against certain types of breast cancer. A team from IRCM, in partnership with researchers from the Frédéric-Joliot and Gustave Roussy Institutes, has shed new light on this protein. Stress response ; Molecular mechanisms Jacob Scientific result Rad51 filament;budding yeast;Srs2; Fri, 12 Oct 2018 10:00:00 GMT Cerebral lymphoma: a new indication for [18F]Fludarabine? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/TEP-18FFludarabine-lymphome-cerebral.aspx A SHFJ research team (LDM-TEP, GIP Cyceron, Caen) has previously developed and produced a radiopharmaceutical, the [18F]-Fludarabine, to detect lymphomas using PET scan. The team has recently conducted a preclinical study that shows the molecule can help in diagnosis of cerebral lymphoma by differentiate it from glioblastoma, the main brain tumor. A clinical study should be launched before the end of the year. Brain ; Medical imaging ; Cancer ; Diagnosis Joliot Scientific result FDG;lymphoma;glioblastoma; Mon, 08 Oct 2018 10:00:00 GMT DNA repair: in-depth look at the initial stages https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/DNA-repair-zoom-first-steps.aspx A research team from the SB2SM (I2BC@Saclay), in collaboration with the CNRS, SOLEIL , Universities of Paris-Sud, Aix-Marseille and Paul Sabatier - Toulouse III and Gustave Roussy, has resolved structures of two complexes involved in radiation-induced DNA damages. These results were published in Nature Structural & Molecular Biology on October, the 5th. DNA ; Structural biology ; Molecular mechanisms SB2SM Press release Mon, 08 Oct 2018 10:00:00 GMT A reliable and accessible algorithm based on EEG to diagnose states of consciousness https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/EEG-algorithm-diagnosis-states-consciousness.aspx An international collaboration, led by the Institut du Cerveau et de la Moelle épinière – ICM (Brain & Spine Institute) and involving researchers from NeuroSpin, offers a new electroencephalogram (EEG) tool that helps the diagnosis of disorders of consciousness. Unlike other tools developed so far and dedicated to a few expert centers, “DoC-Forest” would be accessible to most of the hospitals worldwide. Brain ; Medical imaging ; Artificial intelligence ; Diagnosis Neurospin Scientific result EEG;biomarker;disorders of consciousness;machine learning; Fri, 05 Oct 2018 10:00:00 GMT What is the relationship between variants of the BRCA1 gene and susceptibility to cancer? https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/relationship-variants-BRCA1-cancer.aspx Research Teams from the Curie Institute, the Gustave Roussy Institute, as well as the biophysics teams from the Institute of Chemistry of Natural Substances and SB2SM (I2BC@Saclay) met to systematically identify structural defects and BRCA1 proteins encoded by variants of the BRCA1 gene, a gene predisposing to breast and ovarian cancer. Their results make it possible to propose a classification of these variants (neutral versus causal). Cancer ; Structural biology ; DNA Scientific result Fri, 28 Sep 2018 10:00:00 GMT Mass spectrometry for quality control of vaccines https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/spectrometry-quality-control-vaccines.aspx ​A SPI Research Team (LI2D, Marcoule), in collaboration with CIRAD and AU-PANVAC, proposes a new quality control technique for veterinary vaccines, based on very high resolution mass spectrometry. This strategy, based on the use of an ad hoc database to measure the proportion of antigens and contaminants in the vaccine preparation, will improve the quality control of vaccines against contagious caprine pleuropneumonia. Mass spectrometry ; Vaccine Scientific result Thu, 05 Jul 2018 10:00:00 GMT A SIMOPRO project supported by SATT Paris-Saclay https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2018/SIMOPRO-project-supported-by-SATT-paris-saclay.aspx ​A SIMOPRO project supported by SATT Paris-Saclay: in vivo validation of the efficacy of the DTR8 molecule, developed and patented at SIMOPRO (Department of Medicines and Technologies for Health) in collaboration with Inserm, as a treatment for glomerulonephritis rapidly progressive. Institutional ; Toxicology ; Diagnosis and innovative treatment News Wed, 30 May 2018 10:00:00 GMT Toxins, vaccines, biobetters: a mission at the Butantan Institute of São Paulo https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2018/Toxins-vaccines-biobetters-butantan.aspx ​​Last April, a delegation of experts from the DRF visited colleagues at the Butantan Institute of São Paulo, a biomedical research center that has had close links with several researchers at the Joliot Institute since 2014. This mission is is concluded by the signing of a framework agreement between the two institutes in the field of therapeutic and vaccine innovation. Institutional ; Toxicology ; Vaccine News Fri, 25 May 2018 10:00:00 GMT An advance in the understanding of exchanges between DNA molecules during recombination https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/advance-exchanges-recombination.aspx Collaborative work between the SBIGeM (I2BC@Saclay) and the Marseille Cancer Research Center, published in Molecular Cell, illuminates the mechanistic basis and genetic control of homologous recombination, a mechanism for repairing DNA breaks responsible for chromosome exchange during meiosis. However, canonical models do not explain the complexity of meiotic recombination profiles and this study, which reconstructs reaction intermediates, constitutes a major advance in the understanding of this mechanism. DNA ; Genomics News Tue, 15 May 2018 10:00:00 GMT Ultrasound to improve drug delivery to the brain https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/ultrasound-drug-delivery-brain.aspx Researchers from NeuroSpin (Frédéric Joliot Institute/CEA) and MIRCen (François Jacob Institute/CEA Institute of Biology) have just developed an ultrasound device guided by magnetic resonance imaging (MRI) to increase temporarily and locally the vascular permeability in non-human primates, which could be used to effectively deliver drugs to the brain. Brain ; Health & life sciences ; Pharmacology Scientific result Mon, 19 Feb 2018 11:00:00 GMT Transcription regulation by the Mediator: recent progress https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/transcription-regulation-mediator.aspx Julie Soutourina (I2BC@Saclay / SBIGeM) was invited by Nature Reviews Molecular Cell Biology to publish a review on the molecular functioning of the Mediator, a multi-protein complex, conserved from yeast to humans, and essential to the regulation of the expression of genes. Potential therapeutic approaches targeting the Mediator (cancer, fungal infections) are also adressed. Health & life sciences ; Gene and cell therapy Scientific result Wed, 17 Jan 2018 11:00:00 GMT Antibiotic resistance: a Joliot Institute project funded by EIT Health https://www.cea.fr/drf/joliot/en/Pages/news/Science/2017/antibiotic-resistance-a-joliot-institute-project-funded-by-eit-health.aspx ​A SPI/LERI Research Team has recently developed new test strips for the detection of some multi-resistant bacteria. A hospitalization project for these high-speed screening tests will be rolled out in 2018 with funding from EIT Health. Health & life sciences ; Antibiotics ; Bacteria Scientific result Wed, 29 Nov 2017 11:00:00 GMT New Project Aimed at Reducing Antibiotic Resistance https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2017/new-project-aimed-at-reducing-antibiotic-resistance.aspx ​The CEA Frédéric Joliot Institute is involved in project CARBAMAT to fight against antibiotic resistance. SATT Paris-Saclay, a company promoting technology transfer, supports this project. Institutional ; Antibiotics ; Health & life sciences News Fri, 28 Apr 2017 10:00:00 GMT Epigenetics: how to reach inaccessible genes? https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2016/Epigenetics_how_reach_inaccessible_genes.aspx ​Biologists have brought to light the operation of "chromatin remodellers", key enzymes in cells. They have discovered how the genetic material, condensed in the nucleus of the cell, needs to be remodelled so that the cell machinery can access the genes. This work, initiated by IBITECS/SBIGeM, coordinated by researchers from a CEA/CNRS/Université Paris-Sud laboratory, under an international collaborative project with Pennsylvania State University (USA) and Guangzhou University (China), was published in Nature on 4 February 2016.​​ Epigenetics News Wed, 12 Apr 2017 13:23:30 GMT MeioC, discreet but essential orchestra conductor of meiosis. https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2016/MeioC_orchestra_conductor_meiosis.aspx This study, in which a team of SPI/LI2D, specialized in proteogenomics, has contributed reveals the crucial role of the Meioc protein as a meiosis regulator. This protein stabilizes the mRNAs essential to the chronological procedure of the very complex phenomenon of sexual reproduction.​​ Cell division News Wed, 12 Apr 2017 13:23:25 GMT Mediator independently orchestrates multiple steps of preinitiation complex assembly in vivo https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2016/Mediator_transcriptional_regulation.aspx ​A genomic study of the role of the Mediator of transcriptional regulation, carried out by a SBIGeM team, shows that this multiprotein complex coordinate the multiple stages of the setting up of the transcriptional machinery in vivo.​​ DNA News Wed, 12 Apr 2017 13:23:19 GMT A new vision of the in vivo function of the transcription mediator https://www.cea.fr/drf/joliot/en/Pages/news/Science/2017/A_new_vision_of_the_in_vivo_function_of_the_transcription_mediator.aspx An in vivo, in vitro and in silico study of the Mediator of Transcriptional Regulation has shown how the function of this multiprotein complex is coordinated with another essential component of the transcription machinery, the TFIIB factor, and the architecture of the promoter. This study, led by SBIGeM, was conducted in collaboration with several other Research Teams (CNRS, CEA, INRA). DNA ; Health & life sciences Scientific result Tue, 31 Jan 2017 11:00:00 GMT Micellar nanovectors for tumor imaging. https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2015/Micellar_nanovectors_tumor_imaging.aspx In the context of a collaboration with the I²BM institute, researchers from SCBM have designed micellar vectors for targeting and visual delineation of tumors. Nanomedicine ; Cancer News Tue, 15 Dec 2015 11:00:00 GMT Modulating cerebral cholesterol: a new avenue of research to treat Alzheimer’s disease? https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/I2BM_anglais/News/Scientific_news/Articles/2015/Modulating-cerebral-cholesterol-new-avenue-research-treat-Alzheimer.aspx Two French research teams have recently shown in a rodent model that overexpression of an enzyme capable of eliminating excess cholesterol in the brain can act in a beneficial way on the tau component of the disease to completely correct it. Alzheimer's disease ; Gene and cell therapy ; Biotechnology MIRcen Scientific result Mon, 14 Sep 2015 10:00:00 GMT Hug1 is an intrinsically disordered protein that inhibits ribonucleotide reductase activity by directly binding Rnr2 subunit. https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2015/Hug1_and_RNR.aspx ​A study, coordinated by a SBIGeM team in collaboration with a SB2SM team, allowed to describe the role of the Hug1 protein in regulating the activity of the ribonucleotide reductase complex (RNR). The level of active RNR is controlled during cell cycle and in response to DNA damages. DNA ; Stress response ; Cell division News Mon, 04 May 2015 10:00:00 GMT How does a mobile DNA sequence find its target? https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2015/How-does-mobile-DNA-sequence-find-target.aspx Certain mobile DNA sequences shape genomes and are maintained over the course of generations. How is this explained? The interaction between two proteins, which is essential for their integration into a specific area of the yeast genome, has been identified. This finding has interesting implications for gene therapy. DNA ; Gene and cell therapy Saclay Scientific result Fri, 01 May 2015 10:00:00 GMT