Affiliation:
1. Steno Diabetes Center Aarhus Aarhus University Hospital Aarhus Denmark
2. Department of Clinical Medicine Aarhus University Aarhus Denmark
3. Department of Biomedicine Aarhus University Aarhus Denmark
4. Omeros Corporation Seattle Washington USA
5. Department of Infection, Immunity, and Inflammation University of Leicester Leicester UK
6. Department of Endocrinology and Internal Medicine Aarhus University Hospital Aarhus Denmark
Abstract
AbstractMannan‐binding lectin (MBL) initiates the lectin pathway of complement and has been linked to albuminuria and mortality in diabetes. We hypothesize that MBL‐associated serine protease 2 (MASP‐2) deficiency will protect against diabetes‐induced kidney damage. Male C57BL/6J MASP‐2 knockout (Masp2−/−) mice and wildtype (WT) mice were divided into a diabetic group and a non‐diabetic group. Renal hypertrophy, albumin excretion, mesangial area and specific mRNA expressions in the renal cortex were measured after 8 and 12 weeks of diabetes. By two‐way ANOVA it was tested if MASP‐2 modulated the renal effects of diabetes, that is interaction. After 12 weeks of diabetes Masp2−/− diabetic mice had a smaller mesangium at 21.1% of the glomerular area (95% CI 19.7, 22.6) compared with WT diabetic mice, 25.2% (23.2, 27.2), p(interaction) = 0.001. After 8 weeks of diabetes, plasma cystatin C was 261.5 ng/mL (229.6, 297.8) in the WT diabetic group compared to 459.9 ng/mL (385.7, 548.3) in non‐diabetic WT mice, p < 0.001. By contrast, no difference in plasma cystatin C levels was found between the Masp2−/− diabetic mice, 288.2 ng/mL (260.6, 318.6) and Masp2−/− non‐diabetic mice, 293.5 ng/mL (221.0, 389.7), p = 0.86 and p(interaction) = 0.001. We demonstrated a protective effect of MASP‐2 deficiency on mesangial hypertrophy after 12 weeks of diabetes and an effect on plasma cystatin C level. MASP‐2 deficiency did, however, fail to protect against diabetic‐induced alterations of kidney weight, albuminuria and renal mRNA expression of fibrotic‐ and oxidative stress markers.
Funder
Sundhed og Sygdom, Det Frie Forskningsråd
Fonden til Lægevidenskabens Fremme
Aarhus Universitet
Subject
Immunology,General Medicine
Cited by
1 articles.
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