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Kinin B_2 receptor does not exert renoprotective effects on mice with glycerol-induced rhabdomyolysis

World Journal of Nephrology 2014年第3期3卷 85-91页

作者： Pedro Paulo Gattai Fernando Francisco Pazello Mafra Frederick Wasinski Sandro Soares Almeida Marcos Ant?nio Cenedeze Denise Maria Avancini Costa Malheiros Reury Frank Pereira Bacurau Carlos Castilho Barros Niels Olsen Saraiva Camara Ronaldo Carvalho Araujo Department of Biophysics Laboratory of Genetics and Exercise Metabolism Federal University of Sao Paulo-UNIFESP Sao Paulo CEP 04039-032 Brazil Federal University of Sao Paulo-UNIFESP Sao Paulo CEP 04039-032 Brazil Nephrology Division Laboratory of Clinical and Experimental Immunology Federal University of Sao Paulo–UNIFESP Sao Paulo CEP 04039-032 Brazil Renal Division Department of Clinical Medicine Laboratory of Renal Pathophysiology (LIM-16) Sao Paulo University-USP Sao Paulo CEP 04039-032 Brazil School of Arts Sciences and Humanities Sao Paulo University-USP Sao Paulo CEP 04039-032 Brazil Nutrition Faculty Federal University of Pelotas Rio Grande do Sul CEP 96010-610 Brazil Department of Immunology Laboratory of Transplantation in Immunobiology Sao Paulo University-USP Sao Paulo CEP 05508-000 Brazil

AIM： To investigate a potential protective role of the kinin B2 receptor in a glycerol-induced rhabdomyolysis mouse model. METHODS： We separated 28 C57Bl/6 male mice into 4 groups： untreated WT animals, untreated B2 knockout mice, glycerol-treated WT and glycerol-treated B2 knockout mice. Glycerol-treated animals received one intramuscular injections of glycerol solution （50% v/v, 7 mL/kg）. After 48 h, urine and blood samples were collected to measure creatinine and urea levels. Addi-tionally, kidney samples were extracted for histological evaluation, and the mRNA expression levels of kinin B1 and B2 receptors and infammatory mediators were measured by real-time polymerase chain reaction. RESULTS： Serum creatinine and urea levels showed differences between untreated wild-type and glycerol-treated wild-type mice （0.66 ± 0.04 vs 2.61 ± 0.53 mg/dL, P 〈 0.01; and 33.51 ± 2.08 vs 330.2 ± 77.7 mg/dL, P 〈 0.005）, and between untreated B2 knock-out mice and glycerol-treated knockout mice （0.56 ± 0.03 vs 2.23 ± 0.87 mg/dL, P 〈 0.05; and 42.49 ± 3.2 vs 327.2 ± 58.4 mg/dL, P 〈 0.01）, but there was no difference between the glycerol-treated wild-type and glycerol-treated knockout mice. Glycerol was able to in-duce a striking increase in kinin B2 receptor expression （〉 30 times, 31.34 ± 8.9） in kidney. Animals injected with glycerol had a higher degree of tubular injury than untreated animals. Wild-type and knockout mice treat-ed with glycerol intramuscularly present kidney injury, with impairment in renal function. However, B2 knock-out mice treated with glycerol did not show a different phenotype regarding kidney injury markers, when com-pared to the wild-type glycerol-treated group. CONCLUSION： We conclude that the kinin B2 receptordoes not have a protective role in renal injury.

关键词： kinins acute kidney injury Animal models Rhabdomyolysis Skeletal muscle

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