Core B will provide imaging services and antibodies to the projects in the Program. Microfibril ultrastructure in tissuesfrom mouse models relevant to the Marfan syndrome will be evaluated by transmission electron microscopy, byimmunoelectron microscopy, and by laser confocal microscopy as required by the individual projects. Extracellularmatrix elaborated by cells in culture can be similarly evaluated. A novel method of fixing tissues using high pressurefreezing has been developed which allows improved visualization of cell-matrix interactions in the aorta. This methodwill be available for Project Investigators to better analyze aortae from fibrillin-1 mutant mice. Monoclonal andpolyclonal antibodies specific for fibrillins, for LTBPs, and for BMP-7 will be produced, tested, and provided to theProjects as needed. A newly produced and characterized pan-fibrillin monoclonal antibody is now available and shouldallow better immunohistochemical visualization of fibrillin in mice. In addition to providing these reagents andservices, Core B will produce and characterize new monoclonal antibodies specifically required to advance the ProgramProject.
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