Glomerular volume and the glomerular vascular pole area in patients with insulin-dependent diabetes mellitus.

Autor: Østerby, R., Asplund, Johan, Bangstad, Hans-Jacob, Nyberg, Gudrun, Rudberg, Susanne, Viberti, Gian Carlo, Walker, James D.
Zdroj: Virchows Archiv: European Journal of Pathology; Oct1997, Vol. 431 Issue 5, p351-357, 7p
Abstrakt: The vascular pole area (VPA) and glomerular volume were measured in renal biopsies from 9 insulin-dependent diabetes mellitus (IDDM) patients with normal albumin excretion rate (IDDM group 1), 38 IDDM patients with albumin excretion rate >15 μg/min (IDDM group 2) and 10 living kidney donors (ND). The volume of individual glomeruli was estimated as the sum of profile areas factored by the measured distance between levels, t∼ 10 μm, and VPA as the sum of chords multiplied by t. Mean glomerular volume was increased in IDDM patients but reached statistical significance only in IDDM group 2 ( P = 0.002 vs ND). VPA was significantly different among the groups, mean (CV%) was 2036 (29) μm2 in ND, 3555 (34) μm2 in IDDM group 1, and 3528 (48) μm2 in IDDM group 2, p = 0.004 and 0.001, IDDM versus ND. VPA calculated as a percentage of the surface area of the corresponding glomerulus was 2.4 (23)% in ND, 3.4 (27)% in IDDM group 1, and 3.3 (42)% in IDDM group 2; P = 0.007 and 0.01, IDDM versus ND. The intra-biopsy coefficient of variation was high (20–35%) and of the same order in all groups for all three measurements. Glomerular volume and absolute as well as relative size of VPA showed a positive correlation with estimates of mesangial expansion in IDDM group 2 and the VPA showed a negative correlation with GFR. Thus, part of the enlargement may represent a compensatory phenomenon triggered by the development of structural and functional abnormalities in the diabetic kidney. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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