glomerular mesangial cell proliferation intraglomerular mesangial cell proliferation mah biological_process 2010-02-22T01:44:29Z The multiplication or reproduction of intraglomerular glomerular mesangium cells by cell division, resulting in the expansion of their population. Intraglomerular mesangial cells are specialized pericytes located among the glomerular capillaries within a renal corpuscle of a kidney. They are required for filtration, structural support and phagocytosis. GO:0072123