{"title":"Malate reduced kidney injury molecule (KIM-1) expression and selectively upregulated the renal nitric oxide production in obstructive nephropathy.","authors":"Osaze Edosuyi, Myung Choi, Vashti Edosuyi, Ighodaro Igbe, Adebayo Oyekan","doi":"10.4149/BLL_2023_024","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Malate, the tricarboxylic acid (TCA) cycle intermediary, upregulates renal nitric oxide (NO) signaling, and NO is renoprotective in nephropathy.</p><p><strong>Objectives: </strong>This study explored the hypothesis that malate could increase renal NO and decrease renal injury and fibrotic markers in obstructive nephropathy.</p><p><strong>Methods: </strong>Kidney injury was induced in rats via unilateral surgical ligation of the ureter, there after, rats were treated with malate (600 mg/kg, p.o.) for ten days. Urine was collected on days 0, 4, 7 and 10. Urinary sodium excretion was also determined. Western blot and biochemical analyses were carried on the nephropathic kidneys.</p><p><strong>Results: </strong>Malate reduced kidney injury molecule (KIM-1) expression in the renal cortex and medulla of nephropathic rats (p < 0.05). NO production was selectively increased in the medulla of nephropathic rats treated with malate (58.3 ± 1.3 vs 77.8 ± 4.4 µM/ng, p < 0.05). Superoxide dismutase and catalase activity increased in the kidney of malate-treated nephropathic rats (p < 0.05). Transforming growth factor (TGF-β), an index of fibrosis, increased in the cortex but not medulla of the malate-treated UUO group. There was a consistent increase in collagenase activity in the cortex, and a reduction in the medulla.</p><p><strong>Conclusion: </strong>Malate ameliorated the injury and inflammation but selectively reduced fibrosis in obstructive nephropathy (Fig. 6, Ref. 32). Text in PDF www.elis.sk Keywords: Malate, tricarboxylic acid cycle, nitric oxide, kidney injury molecule (KIM-1), obstructive nephropathy.</p>","PeriodicalId":55328,"journal":{"name":"Bratislava Medical Journal-Bratislavske Lekarske Listy","volume":null,"pages":null},"PeriodicalIF":1.5000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bratislava Medical Journal-Bratislavske Lekarske Listy","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.4149/BLL_2023_024","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MEDICINE, GENERAL & INTERNAL","Score":null,"Total":0}
引用次数: 1
Abstract
Background: Malate, the tricarboxylic acid (TCA) cycle intermediary, upregulates renal nitric oxide (NO) signaling, and NO is renoprotective in nephropathy.
Objectives: This study explored the hypothesis that malate could increase renal NO and decrease renal injury and fibrotic markers in obstructive nephropathy.
Methods: Kidney injury was induced in rats via unilateral surgical ligation of the ureter, there after, rats were treated with malate (600 mg/kg, p.o.) for ten days. Urine was collected on days 0, 4, 7 and 10. Urinary sodium excretion was also determined. Western blot and biochemical analyses were carried on the nephropathic kidneys.
Results: Malate reduced kidney injury molecule (KIM-1) expression in the renal cortex and medulla of nephropathic rats (p < 0.05). NO production was selectively increased in the medulla of nephropathic rats treated with malate (58.3 ± 1.3 vs 77.8 ± 4.4 µM/ng, p < 0.05). Superoxide dismutase and catalase activity increased in the kidney of malate-treated nephropathic rats (p < 0.05). Transforming growth factor (TGF-β), an index of fibrosis, increased in the cortex but not medulla of the malate-treated UUO group. There was a consistent increase in collagenase activity in the cortex, and a reduction in the medulla.
Conclusion: Malate ameliorated the injury and inflammation but selectively reduced fibrosis in obstructive nephropathy (Fig. 6, Ref. 32). Text in PDF www.elis.sk Keywords: Malate, tricarboxylic acid cycle, nitric oxide, kidney injury molecule (KIM-1), obstructive nephropathy.
期刊介绍:
The international biomedical journal - Bratislava Medical Journal
– Bratislavske lekarske listy (Bratisl Lek Listy/Bratisl Med J) publishes
peer-reviewed articles on all aspects of biomedical sciences, including
experimental investigations with clear clinical relevance, original clinical
studies and review articles.