P0407THE INVESTIGATION OF SYNAPTOPODIN EXPRESSION OF PODOCYTES IN GLOMERONEPHRITIS

Abstract Background and Aims Synaptopodin, a proline-rich actin-associated protein, plays an important role in the regulation of podocytes processes structures and dynamics. The mutation or lack of synaptopodin may lead to the changes of podocytes structures and functions and cause the occurrence of proteinuria. But the underlying molecular mechanisms remain primarily elusive. Method we used cellular and pathological experiments to observe the expression changes synaptopodin in vivo and vitrio. Results The results showed that the reduction expression of synaptopodin and RhoA were found in the podocytes in different nephriris of human renal biopsy as well as in rat adriamycin nephropathy. The cultured cells treated with inflammatory cytokins such as TNF, IL-1 also showed decreased synaptopodin level in podocyte, which led to low RhoA level and disarrange the actin cytoskeleton assembly, result in the abnormal changes of podocyte morphology. Conclusion These data preliminarily proved that synaptopodin loss in podocyte injury plays an important role in the regulation of podocyte morphology and function through RhoA signaling pathway, and further researches are required to clarify the more mechanism, which may provide new strategies and methods for the prevention and treatment of glomerular diseases.