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This study aims to investigate the beneficial impact of Tempol on the progression of CKD in a rat model utilizing oxidized albumin as a biomarker.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>After four weeks of treatment, metabolic parameters, including body weight, left ventricle residual weight, kidney weight, urine volume, and water and food intake, were measured. Systolic blood pressure, urinary protein, oxidized albumin level, serum creatinine (Scr), blood urea nitrogen (BUN), 8-OHdG, TGF-\u03b21, and micro-albumin were also assessed. Renal fibrosis was evaluated through histological and biochemical assays. P65-NF-\u03baB was quantified using an immunofluorescence test, while Smad3, P65-NF-\u03baB, and Collagen I were measured using western blot. TNF-\u03b1, IL-6, MCP-1, TGF-\u03b21, Smad3, and P65-NF-\u03baB were analyzed by RT-qPCR.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Rats in the high-salt diet group exhibited impaired renal function, characterized by elevated levels of blood urea nitrogen, serum creatinine, 8-OHdG, urine albumin, and tubulointerstitial damage, along with reduced body weight. However, these effects were significantly ameliorated by Tempol administration. In the high-salt diet group, blood pressure, urinary protein, and oxidized albumin levels were notably higher compared to the normal diet group, but Tempol administration in the treatment group reversed these effects. Rats in the high-salt diet group also displayed increased levels of proinflammatory factors (TNF-\u03b1, IL-6, MCP1) and profibrotic factors (NF-\u03baB activation, Collagen I), elevated expression of NADPH oxidation-related subunits (P65), and activation of the TGF-\u03b21\/Smad3 signaling pathway. Tempol treatment inhibited NF-\u03baB-mediated inflammation and TGF-\u03b21\/Smad3-induced renal fibrosis signaling pathway activation.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>These findings suggest that Tempol may hold therapeutic potential for preventing and treating rats undergoing 5\/6 nephrectomy. Further research is warranted to elucidate the mechanisms underlying Tempol\u2019s protective effects and its potential clinical applications. Besides, there is a discernible positive relationship between oxidized albumin and other biomarkers, such as 8-OHG, urinary protein levels, mALB, Scr, BUN, and TGF-\u03b21 in a High-salt diet combined with 5\/6 nephrectomy rat model. These findings suggest the potential utility of oxidized albumin as a sensitive indicator for oxidative stress assessment.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12882-024-03495-0","type":"journal-article","created":{"date-parts":[[2024,2,23]],"date-time":"2024-02-23T18:02:33Z","timestamp":1708711353000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Assessing the effects of tempol on renal fibrosis, inflammation, and oxidative stress in a high-salt diet combined with 5\/6 nephrectomy rat model: utilizing oxidized albumin as a biomarker"],"prefix":"10.1186","volume":"25","author":[{"given":"Beibei","family":"Liu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanling","family":"Hu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Danyang","family":"Tian","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianlong","family":"Dong","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bing-Feng","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,2,23]]},"reference":[{"key":"3495_CR1","doi-asserted-by":"publisher","first-page":"22857","DOI":"10.1002\/jcp.28849","volume":"234","author":"X Bian","year":"2019","unstructured":"Bian X, Bai Y, Su X, Zhao G, Sun G, Li D. 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