“…The evidence for a profibrotic role of platelets in diseases affecting the glomerular capillaries (i.e., glomerulonephritis and glomerulosclerosis) has mainly been indirect (for reviews see [15,27]): (1) platelets and their degranulation products have been documented in both experimental and human glomerulopathies, such as mesangioproliferative glomerulonephritis, membranous glomerulonephritis, and lupus nephritis; (2) shortened biological half-life of platelets, indicating increased platelet consumption, has been demonstrated in patients with various glomerular diseases; and (3) platelets contain a number of vasoactive, chemotactic, and profibrotic substances, which, when released within the glomerulus, are likely to amplify the tissue repair process. These substances include platelet-activating factor, platelet secretary products, polycationic macromolecules, platelet factor-4, b-thromboglobulin, various growth factors, and, important in the context of this study, high concentrations the profibrotic cytokine TGF-b.…”