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DTSTART;TZID=Europe/Madrid:20230606T093000
DTEND;TZID=Europe/Madrid:20230606T110000
DTSTAMP:20260421T231521
CREATED:20230503T152810Z
LAST-MODIFIED:20230503T152810Z
UID:107647-1686043800-1686049200@ibecbarcelona.eu
SUMMARY:IBEC Seminar: Danny Hatters
DESCRIPTION:Protein interactions gone awry in neurodegenerative disease\nDanny Hatters\, Department of Biochemistry and Pharmacology | Faculty of Medicine\, Dentistry and Health Sciences\nThe University of Melbourne\,  Australia\n \nThe Hatters lab studies impacts of protein misfolding and aggregation in cultured cell models of neurodegenerative diseases. We have developed approaches to examine principles governing how proteins inappropriately aggregate and new approaches with chemical reagents to monitor cysteine reactivity to probe changes in proteome foldedness and conformation. I will discuss recent findings from our laboratory that provide insight to the consequences of protein aggregation by globular proteins\, and how we can model the types of protein-protein interactions that are involved. I will also discuss how we can monitor changes in protein structure and function in response to stresses and stimuli\, and under conditions of disease in Huntington Disease.
URL:https://ibecbarcelona.eu/es/event/ibec-seminar-danny-hatters/
LOCATION:Sala Dolors Aleu\, Cluster II\, IBEC\, Baldiri i Reixac\, Barcelona
CATEGORIES:IBEC Seminar
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20230619T123000
DTEND;TZID=Europe/Madrid:20230619T133000
DTSTAMP:20260421T231521
CREATED:20230502T111657Z
LAST-MODIFIED:20230607T134735Z
UID:107616-1687177800-1687181400@ibecbarcelona.eu
SUMMARY:IBEC Seminar: Amnon Buxboim
DESCRIPTION:How does ageing-related stiffening of brain tissue microenvironments affect the regenerative capacity of cns progenitor cells\nProfessor of biology and bioengineering\, the Hebrew University of Jerusalem\, Israel. \nAgeing-related stiffening of neuronal microenvironments in the brain generates potent signals that attenuate the regenerative capacity of oligodendrocyte progenitor cells (OPCs) to proliferate and differentiate. We find that ageing drives substantial remolding of the nuclear lamina in OPCs\, in which A-type lamin levels increase and B-type lamin expression decreases. Owing to the ubiquitous role of lamins in anchoring mostly heterochromatic sections at the nuclear envelope known as lamina associated domains (LAD’s)\, we hypothesized that ageing effects are mediated via altered genomic organization and regulation. In this study\, we isolate OPCs from neonate and aged rats and study the effects of ageing-related tissue stiffening by designing and optimizing hydrogel-based matrices that mimic the extracellular elasticity and adhesion signals of neonate and aged microenvironments. Indeed\, the differences in cellular morphologies and lamina compositions between neonate and aged cells are recapitulated by matrix elasticity. To characterize differences in the structural organization of the nuclear lamina\, we combine high-resolution optical and electron microscopies and perform micropipette aspiration based rheology to define the viscoelastic properties of OPC nuclei within intact cells. LAD mapping is performed using optimized CUT&RUN assays that target endogenous lamin-B1\, thus avoiding the effects of ectopic expression of nuclear envelope proteins\, which is a prerequisite by standard methodologies. Downstream effects on transcriptional regulation are studied via single-cell RNA sequencing (scRNA-seq)\, thus providing insight into cell-to-cell variations. In summary\, our work-in-progress highlights the mechanobiological component of ageing on progenitor cells of the CNS that can stimulate potential therapeutic strategies. \n\nDr. Amnon Buxboim is a professor of biology and bioengineering\, the Hebrew University of Jerusalem\, Israel. Trained as a biophysicist\, he opened the Buxboim Lab for Mechanobiology in 2013. Dr. Buxboim research aims at understanding how physical and mechanical inputs combine with parallel signaling pathways to direct cell-fate decision-making processes. The Buxboim Lab studies oocyte maturation\, preimplantation embryo development\, stromal bone marrow immunomodulation\, and CNS stem/progenitor cell ageing. Dr. Buxboim also studies mechanisms of nuclear mechanotransduction\, as mediated via nuclear lamins and associated nuclear envelope proteins. The Buxboim Lab combines established assays\, advanced computational tools\, newly designed device-based technologies\, and integrates single-cell level genomics with micro-rheological measurements. Based on his research findings\, Dr. Buxboim develops assisted reproductive technologies to advance and improve medical care.
URL:https://ibecbarcelona.eu/es/event/ibec-seminar-amnon-buxboim/
LOCATION:Sala Dolors Aleu\, Cluster II\, IBEC\, Baldiri i Reixac\, Barcelona
CATEGORIES:IBEC Seminar
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20230620T113000
DTEND;TZID=Europe/Madrid:20230620T133000
DTSTAMP:20260421T231521
CREATED:20230502T111443Z
LAST-MODIFIED:20230607T134316Z
UID:107614-1687260600-1687267800@ibecbarcelona.eu
SUMMARY:IBEC Seminar: Magali Suzanne
DESCRIPTION:Mechanical impact of cell delamination on tissue dynamics\, in developmental and tumoral contexts\nCentre de Biologie Intégrative\, CNRS/UMR 5088\, Université Toulouse III\, Toulouse\, France \nHow mechanical forces drive morphogenesis is a fundamental question in the field of biomechanics. Combining imaging\, genetics\, biophysical and modeling approaches\, we found that apoptotic cells\, far from being eliminated passively\, exert a force before dying and thus actively participate in tissue remodeling. This transient force\, generated in the depth of the epithelium\, constitute a mechanical signal involved in tissue folding. Comparing apoptotic cell dynamics to cells undergoing EMT\, we found that a very similar apico-basal force is generated at the onset of EMT.\nWe further deciphered how these forces are transmitted at the tissue scale through the characterization of a specific mechanical state favoring directional force transmission and developed a new method that offers the opportunity to extract automatically\, in strongly deformed epithelia\, a precise characterization of the spatial organization of a given cytoskeletal network combined to morphological quantifications in highly remodeled 3D epithelial tissues.\nIn parallel\, we turned to cancer mechanics\, focusing particularly in tumor progression. Cancer is a largely widespread pathology that corresponds to an overproliferation of cells that could finally invade others tissues. Tumors develop through three increasingly aggressive steps: (1) hyperplasia\, which corresponds to cells overproliferation; (2) dysplasia\, during which cells can acquire a more mesenchymal phenotype\, and finally (3) metastasis. Tumor development can be influenced by mutations but also by external factors\, such as extracellular matrix rigidity. However\, a comprehensive understanding of the intrinsic factors driving tumor evolution is still lacking. Our recent unpublished work identifies unexpected factors that could influence tumor development\, and more specifically the hyperplasia/dysplasia transition\, a critical step in tumor aggressiveness. This work highlights puzzling differences between developmental and tumoral mechanics.
URL:https://ibecbarcelona.eu/es/event/ibec-seminar-magali-suzanne/
LOCATION:Sala Dolors Aleu\, Cluster II\, IBEC\, Baldiri i Reixac\, Barcelona
CATEGORIES:IBEC Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20230628T120000
DTEND;TZID=Europe/Madrid:20230628T130000
DTSTAMP:20260421T231521
CREATED:20230626T100738Z
LAST-MODIFIED:20230626T103836Z
UID:109214-1687953600-1687957200@ibecbarcelona.eu
SUMMARY:IBEC Seminar: Dr. Benjami Oller-Salvia
DESCRIPTION:Development of chemical and synthetic biology tools to generate biotherapeutics and to tackle brain diseases\nDr. Benjami Oller-Salvia\, IQS \nIn our group we develop chemical and synthetic biology tools to generate biotherapeutics and to tackle brain diseases. In the first part of the talk\, I will report our efforts toward developing strategies to construct conditionally-active biotherapeutics that target antigens considered undruggable. In the second part of the talk\, I will present our work on peptides for drug delivery across the blood brain barrier. There\, I will highlight the recent development of a new family of bicyclic brain shuttles and provide a hint toward new ways of exploring brain transport. .
URL:https://ibecbarcelona.eu/es/event/ibec-seminar-dr-benjami-oller-salvia/
LOCATION:Sala Dolors Aleu\, Cluster II\, IBEC\, Baldiri i Reixac\, Barcelona
CATEGORIES:IBEC Seminar
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