Protection against diabetes-induced nephropathy in growth hormone receptor/binding protein gene-disrupted mice.
Endocrinology 2000;
141:163-8. [PMID:
10614635 DOI:
10.1210/endo.141.1.7284]
[Citation(s) in RCA: 52] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
To further investigate the role of GH in diabetic nephropathy, experimental diabetes was induced with streptozotocin (STZ) in mice in which the GH receptor/binding protein gene was disrupted. Body weight, blood glucose, and renal histology and morphometry were studied 10 weeks after diabetes induction in wild-type (+/+) mice and in mice heterozygous (+/-) and homozygous (-/-) for the disruption. Equivalent levels of hyperglycemia developed in all diabetic groups. Normal weight gain was absent in +/+ and +/- diabetic groups, and -/- diabetics lost weight during the study. Diabetic +/+ and +/- groups both showed evidence of glomerulosclerosis, increases in glomerular volume, and increases in the ratio of mesangial area to total glomerular area, whereas diabetic -/- mice showed none of these pathological changes. These results extend our previous findings of protection against diabetes-associated kidney damage in transgenic mice expressing a GH antagonist. Taken together, the results argue for an important role of GH in the development of diabetes induced end-organ damage.
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