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  • Title: Sinomenine improve diabetic nephropathy by inhibiting fibrosis and regulating the JAK2/STAT3/SOCS1 pathway in streptozotocin-induced diabetic rats.
    Author: Zhu M, Wang H, Chen J, Zhu H.
    Journal: Life Sci; 2021 Jan 15; 265():118855. PubMed ID: 33278392.
    Abstract:
    AIMS: To investigate the therapeutic effects and potent mechanism of sinomenine (SIN) nanoliposomes on nephropathy in diabetic rats. MAIN METHODS: The protective efficacies of SIN on the oxidative injury in renal HK-2 cell induced by hydrogen peroxide (H2O2) were investigated via the CCK-8 assay. Forty SD rats with streptozotocin (STZ)-induced diabetic kidney disease (DKD) were assigned to the saline group and three SIN groups (10, 20 and 40 mg/kg). During 6-week treatment, body weight, fasting glucose level and other metabolic parameters were recorded. H&E staining and changes in renal functions as well as expression levels of apoptosis and fibrosis-related factors in renal tissues were assessed. The qPCR and western blotting (WB) methods were used to detect relative expression levels of JAK/STAT/SOCS pathway-related factors in the renal tissues. KEY FINDINGS: Cell viabilities of HK-2 cells with oxidative injury were obviously improved by incubating with SIN at 320 μg/mL for 92.9%. Significantly up-regulated GPX1, SOD2 and GSH contributed to the down-regulated ROS content in SIN-treated groups. Moreover, 6-week administration of SIN improved renal functions and worsening nephropathy morphology of DKD rats. SIN also ameliorated gradually increased renal cell apoptosis, suppressed expression levels of fibrosis-related proteins as well as IL-6 and ICAM-1, and regulated JAK2/STAT3/SOCS1 pathway, thereby exhibited protective effects on renal tissues of DKD rats. CONCLUSION: SIN protects nephrocytes and decreases renal tissue injury via inhibiting oxidative stress, reducing renal cell apoptosis and fibrosis, regulating the JAK2/STAT3/SOCS1 pathway in DKD rats.
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