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Updated: Aug 19, 2026

Guided Differentiation of Mature Kidney Podocytes from Human Induced Pluripotent Stem Cells Under Chemically Defined Conditions
Published on: July 2, 2020
Expression and regulation of adrenomedullin in renal glomerular podocytes
Masayo Hino1, Miki Nagase, Shinya Kaname
1Department of Nephrology and Endocrinology, University of Tokyo Graduate School of Medicine, Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
Abstract:
Adrenomedullin (AM) is postulated to exert organ-protective effects. It is expressed in the renal glomeruli, but its roles in the glomerular podocytes have been poorly elucidated. In the present study, we investigated the expression and regulation of AM in recently established conditionally immortalized mouse podocyte cell line in vitro and podocyte injury model in vivo. The cultured differentiated podocytes expressed AM mRNA and secreted measurable amount of AM. AM secretion from the podocytes was increased by H(2)O(2), hypoxia, puromycin aminonucleoside (PAN), albumin overload, and TNF-alpha. Real-time RT-PCR analysis revealed that AM mRNA expression in the podocytes was enhanced by PAN and TNF-alpha, both of which were suppressed by mitochondrial antioxidants. Furthermore, AM expression was upregulated in the glomerular podocytes of PAN nephrosis rats. These results indicated that AM expression in the podocytes was upregulated by stimuli or condition relevant to podocyte injury, suggesting its potential role in podocyte pathophysiology.
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