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The mechanism of reabsorption and metabolism of β2-microglobulin in proximal tubule cells―The structure, function, and molecular interaction of megalin, an endocytic receptor Ryohei Kaseda 1 , Akihiko Saito 2 1Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences 2Department of Applied Molecular Medicine, Niigata University Graduate School of Medical and Dental Sciences Keyword: メガリン , エンドサイトーシス , 近位尿細管上皮細胞 pp.37-46
Published Date 2011/1/15
DOI https://doi.org/10.11477/mf.1542102512
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Glomerular filtered β2-microglobulin is reabsorbed by megalin, an endocytic receptor, in proximal tubule cells and then is metabolized in the cells. Megalin mediates the metabolism of many low-molecular-weight-proteins as well as albumin by binding and cooperating with various membranous receptors, transporters, and intracellular molecules. And it is also associated with intracellular signal transduction. Excessive megalin-mediated endocytosis leads to damage of proximal tubule cells. The expression and function of megalin are regulated by insulin and angiotensin II, which is related to the cause of proteinuria and disorder of reabsorption of various essential elements. For this reason, it has been proposed that megalin may be applied in diagnosis and treatment of kidney diseases.


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電子版ISSN 1882-1367 印刷版ISSN 0485-1420 医学書院

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