Targeting force regulation to treat kidney disease

One in ten people worldwide will develop kidney disease, and for many the damage starts when the tiny filter units called glomeruli begin to fail. The glomerulus is a knot of capillaries that strains waste from the blood. Its inner wall relies on specialised cells called podocytes, which must stay firmly glued to a thin sheet of proteins—the glomerular basement membrane (GBM). When that adhesion weakens, the filter breaks. The researcher has already spotted early signs of disease: defects in the GBM and podocyte protrusions pushing into it. What remains unknown is the chain of events that turns these small defects into irreversible scarring, or glomerulosclerosis. This project will test a specific idea: that podocyte–GBM adhesion normally counterbalances the mechanical forces inside the capillary, and that when adhesion fails, a destructive cascade begins. Using cell cultures and mouse models of kidney disease, the team will map the molecular machinery that controls this force balance. If the hypothesis holds, the work will identify new therapeutic targets for chronic kidney disease—a condition that currently has no cure and drives millions toward dialysis or transplant. Even if no drug emerges directly, defining how a capillary wall stays intact under constant pressure will illuminate a fundamental principle of organ biology.