IgA肾病(immunoglobulin A nephropathy,IgAN)属于常见的原发性肾小球肾炎之一,也是终末期肾病(end-stage renal disease,ESRD)的主要病因之一。IgAN的治疗仍然存在挑战,干预相关的危险因素,可延缓疾病的进展。近年发现,高尿酸血症是IgA...IgA肾病(immunoglobulin A nephropathy,IgAN)属于常见的原发性肾小球肾炎之一,也是终末期肾病(end-stage renal disease,ESRD)的主要病因之一。IgAN的治疗仍然存在挑战,干预相关的危险因素,可延缓疾病的进展。近年发现,高尿酸血症是IgAN患者常见的临床特点,也是疾病进展的危险因素之一,但高尿酸血症与IgAN病理改变及疾病进展的关系仍不明确。因此,明确高尿酸血症与IgAN的关系具有重要的临床意义。本文从高尿酸血症在IgAN中的患病率、相关的发病机制与IgAN进展的关系及治疗靶点等方面进行了较为详尽的综述。展开更多
目的 探讨当归芍药散(DSS)含药血清及其有效成分阿魏酸(FA)、芍药苷(PF)对肾间质纤维化(RIF)大鼠的作用及机制。方法 制备当归芍药散药液,以低剂量(0.05 mL DSS药液/10 g体质量)、中剂量(0.1 mL DSS药液/10 g体质量)、高剂量(0.2 mL DS...目的 探讨当归芍药散(DSS)含药血清及其有效成分阿魏酸(FA)、芍药苷(PF)对肾间质纤维化(RIF)大鼠的作用及机制。方法 制备当归芍药散药液,以低剂量(0.05 mL DSS药液/10 g体质量)、中剂量(0.1 mL DSS药液/10 g体质量)、高剂量(0.2 mL DSS药液/10 g体质量)每日同一时间灌胃雄性Sprague Dawley大鼠,持续7 d,腹主动脉取血获得相应低、中、高剂量DSS血清(DSSS)。将大鼠肾小管上皮细胞(NRK-52E)分成对照组、模型组(TGF-β处理)、siRNA转染组(TGF-β+siRNA处理)、FA组(TGF-β+FA处理)、PF组(TGF-β+PF处理)及DSSS低、中、高剂量组(TGF-β+DSSS-L、TGF-β+DSSS-M、TGF-β+DSSS-H分别处理)。筛选并确定DSSS、FA、PF、TGF-β对NRK-52E细胞的干预浓度,对以上各组NRK-52E细胞进行干预。采用Western blotting法检测各组NLRP3、半胱氨酸蛋白酶1(CASP-1)、Gasdermin D(GSDMD)、白细胞介素-18(IL-18)、纤连蛋白(FN)、E型钙黏蛋白(E-Cadherin)、N型钙黏蛋白(N-Cadherin)的蛋白表达变化。结果 相较于模型组,DSSS、FA、PF治疗组细胞焦亡相关蛋白NLRP3、CASP-1、GSDMD、IL-18表达均降低,差异均有统计学意义(P均<0.05)。DSSS中、高剂量及FA、PF治疗组相较于模型组纤维化相关黏附蛋白FN、E-Cadherin、N-Cadherin表达降低,差异均有统计学意义(P均<0.05)。结论 当归芍药散含药血清及有效成分FA、PF可抑制TGF-β诱导的NRK-52E细胞纤维化模型中NLRP3介导的焦亡蛋白激活,并能调节黏附蛋白表达和上皮-间质转化进展,缓解纤维化。展开更多
Kidney transplantation is the best option for kidney replacement therapy,even considering that most of the times the grafts do not survive as long as their recipients.In the Khalil et al's experience,published in ...Kidney transplantation is the best option for kidney replacement therapy,even considering that most of the times the grafts do not survive as long as their recipients.In the Khalil et al's experience,published in this issue of the Journal,they analyze their second kidney graft survival and describe those significant predictors of early loss.This editorial comments on the results and put in perspective that most of the times,long-term graft survival could be inadvertently jeopardized if the immunosuppressive therapy is reduced or withdrawn for any reason,and that it could happen frequently if the transplant physician intends to innovate with the clinical care without proper evidence-based data.展开更多
Objective Ubiquitin-specific protease 4(USP4)facilitates the development of transforming growth factor-beta 1(TGF-β1)-induced epithelial-mesenchymal transition(EMT)in various cancer cells.Moreover,EMT of renal tubula...Objective Ubiquitin-specific protease 4(USP4)facilitates the development of transforming growth factor-beta 1(TGF-β1)-induced epithelial-mesenchymal transition(EMT)in various cancer cells.Moreover,EMT of renal tubular epithelial cells(RTECs)is required for the progression of renal interstitial fibrosis.However,the role of USP4 in EMT of RTECs remains unknown.The present study aimed to explore the effect of USP4 on the EMT of RTECs as well as the involved mechanism.Methods In established unilateral ureteral obstruction(UUO)rats and NRK-52E cells,immunohistochemistry and Western blot assays were performed.Results USP4 expression was increased significantly with obstruction time.In NRK-52E cells stimulated by TGF-β1,USP4 expression was increased in a time-dependent manner.In addition,USP4 silencing with specific siRNA indicated that USP4 protein was suppressed effectively.Meanwhile,USP4 siRNA treatment restored E-cadherin and weakened alpha smooth muscle actin(α-SMA)expression,indicating that USP4 may promote EMT.After treatment with USP4 siRNA and TGF-β1 for 24 h,the expression of TGF-β1 receptor type I(TβRI)was decreased.Conclusion USP4 promotes the EMT of RTECs through upregulating TβRI,thereby facilitating renal interstitial fibrosis.These findings may provide a potential target of USP4 in the treatment of renal fibrosis.展开更多
文摘IgA肾病(immunoglobulin A nephropathy,IgAN)属于常见的原发性肾小球肾炎之一,也是终末期肾病(end-stage renal disease,ESRD)的主要病因之一。IgAN的治疗仍然存在挑战,干预相关的危险因素,可延缓疾病的进展。近年发现,高尿酸血症是IgAN患者常见的临床特点,也是疾病进展的危险因素之一,但高尿酸血症与IgAN病理改变及疾病进展的关系仍不明确。因此,明确高尿酸血症与IgAN的关系具有重要的临床意义。本文从高尿酸血症在IgAN中的患病率、相关的发病机制与IgAN进展的关系及治疗靶点等方面进行了较为详尽的综述。
文摘Kidney transplantation is the best option for kidney replacement therapy,even considering that most of the times the grafts do not survive as long as their recipients.In the Khalil et al's experience,published in this issue of the Journal,they analyze their second kidney graft survival and describe those significant predictors of early loss.This editorial comments on the results and put in perspective that most of the times,long-term graft survival could be inadvertently jeopardized if the immunosuppressive therapy is reduced or withdrawn for any reason,and that it could happen frequently if the transplant physician intends to innovate with the clinical care without proper evidence-based data.
文摘Objective Ubiquitin-specific protease 4(USP4)facilitates the development of transforming growth factor-beta 1(TGF-β1)-induced epithelial-mesenchymal transition(EMT)in various cancer cells.Moreover,EMT of renal tubular epithelial cells(RTECs)is required for the progression of renal interstitial fibrosis.However,the role of USP4 in EMT of RTECs remains unknown.The present study aimed to explore the effect of USP4 on the EMT of RTECs as well as the involved mechanism.Methods In established unilateral ureteral obstruction(UUO)rats and NRK-52E cells,immunohistochemistry and Western blot assays were performed.Results USP4 expression was increased significantly with obstruction time.In NRK-52E cells stimulated by TGF-β1,USP4 expression was increased in a time-dependent manner.In addition,USP4 silencing with specific siRNA indicated that USP4 protein was suppressed effectively.Meanwhile,USP4 siRNA treatment restored E-cadherin and weakened alpha smooth muscle actin(α-SMA)expression,indicating that USP4 may promote EMT.After treatment with USP4 siRNA and TGF-β1 for 24 h,the expression of TGF-β1 receptor type I(TβRI)was decreased.Conclusion USP4 promotes the EMT of RTECs through upregulating TβRI,thereby facilitating renal interstitial fibrosis.These findings may provide a potential target of USP4 in the treatment of renal fibrosis.
