ArticleCurrent medical science2025
Xiaoke Decoction Inhibits COX-2-Mediated LDLr Pathway Dysfunction and Protects Renal Function in Diabetic Nephropathy Rats.
Article in Current medical science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveTraditional Chinese medicine exhibits positive therapeutic effects as a primary or adjunctive treatment for diabetic nephropathy (DN). This study aimed to evaluate the impact and mechanism of action of Xiaoke decoction (XKD), a traditional Chinese medicine, on renal function in DN rats.
methodsA rat model of DN was established, and the rats were divided into five groups (n = 7 per group): normal control group (NC), DN model group (DN), low-dose XKD treatment group (DN + XKD-L, 1.5 g/kg/d), high-dose XKD treatment group (DN + XKD-H, 6 g/kg/d), and cyclooxygenase-2 (COX-2) inhibitor (NS398) treatment group (DN + NS398, 8 mg/kg/d). Medications were administered via gavage for 12 consecutive weeks, while equal volumes of normal saline were given to the NC and DN groups. A glucometer was used to detect changes in blood glucose (BG). Enzyme-linked immunosorbent assay (ELISA) and an automatic biochemical analyzer were employed to measure levels of insulin, serum creatinine (Scr), blood urea nitrogen (BUN), triglyceride (TG), total cholesterol (TC), high-density lipoprotein (HDL), low-density lipoprotein (LDL), and 24-h urine protein quantity (UP/24 h) in rats. Renal tissue sections from different treatment groups were prepared, with tissue lesions examined via periodic acid-Schiff (PAS) and hematoxylin-eosin (HE) staining. Tissue inflammation and lipid deposition were evaluated using ELISA and Oil Red O staining. Immunohistochemistry and Western blotting were used to detect changes in the expression levels of COX-2 and low-density lipoprotein receptor (LDLr) in tissues, and to clarify the regulatory mechanism of XKD on renal function in DN rats.
resultsXKD, particularly at the high dose (XKD-H, 6 g/kg/d), significantly reduced BG, insulin levels, renal weight ratio, Scr, BUN, and UP/24 h in DN rats. DN rats showed significant renal lesions, and XKD gavage (especially XKD-H) markedly improved these pathological changes. In DN rats, XKD significantly decreased the protein expression levels of COX-2 and LDLr, downregulated the levels of inflammatory factors and lipid factors, reduced lipid deposition in renal tissues, and ameliorated structural abnormalities in glomeruli, basement membranes, and renal tubules.
conclusionsXKD alleviates renal tissue damage by regulating the COX-2-mediated LDLr pathway, thereby reducing the release of inflammatory factors and lipid accumulation in DN rats and protecting renal function.
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