共查询到16条相似文献,搜索用时 128 毫秒
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目的:探讨核因子-κB(NF-κB)及其调控的单核细胞化学趋化蛋白-1(MCP-1)在慢性阻塞性肺疾病(COPD)大鼠模型中的表达.方法:36只Wistar大鼠随机分为空白对照组、COPD组、布地奈德治疗组和茶碱治疗组,每组9只;用ELISA法检测各组大鼠外周血单个核细胞(PBMC) NF-κB和MCP-1的表达水平,用免疫组织化学染色和原位杂交技术检测各组大鼠细支气管上皮细胞NF-κB和MCP-1的表达水平.结果:(1)COPD组大鼠PBMC中NF-κB和MCP-1水平以及细支气管上皮细胞NF-κB核染色阳性细胞百分比、MCP-1 mRNA和蛋白表达明显高于正常对照组;(2)布地奈德治疗组和茶碱治疗组大鼠PBMC中NF-κB、MCP-1水平以及细支气管上皮细胞NF-κB核染色阳性细胞百分比、MCP-1 mRNA表达和蛋白表达明显低于COPD组.结论:NF-κB基因及其调控蛋白MCP-1参与了COPD的发病过程,用激素和茶碱治疗后可延缓COPD的发展. 相似文献
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目的观察替米沙坦对2型糖尿病大鼠肾脏病变中单核巨噬细胞趋化蛋白-1(MCP-1)、核因子-κB(NF-κB)表达的影响。方法雄性Wistar大鼠30只,随机分成正常对照组(A组,n=10)和糖尿病模型组(n=20)。A组给予常规饲料;模型组给予高糖高脂饲料,4周后腹腔注射链尿佐菌素(STZ)30mg/kg,造模成功后模型组再随机分成糖尿病组(B组,n=10)和替米沙坦治疗组(C组,n=10),C组每天给予替米沙坦5mg/kg灌胃。替米沙坦干预12周后,用免疫组化法检测各组大鼠MCP-1、NF-κB在肾脏表达的变化。结果与A组比较,B、C组大鼠肾组织中MCP-1、NF-κB表达明显增加(P〈0.01);C组比B组MCP-1、NF-κB表达明显降低(P〈0.01)。结论2型糖尿病大鼠肾组织中MCP-1、NF-κB表达明显增加,替米沙坦可通过降低肾组织MCP-1、NF-κB表达,从而减轻肾脏的炎症反应。 相似文献
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目的观察硝基酪氨酸(NT)对糖尿病肾病(DN)大鼠肾脏核因子-κB(NF-κB)、单核细胞趋化蛋白-1(MCP-1)和转化生长
因子-β1(TGF-β1)表达的影响,探讨其在DN发生发展中的作用机制。方法用链脲佐菌素腹腔注射法建立DN大鼠模型,造模
成功的大鼠随机分3组:DN模型组、DN+NT组和DN+NT+Ebselen组(NT抑制剂),另设正常对照组。各组分别干预8周后,观
察24 h尿蛋白定量变化,采用免疫组织化学染色检测肾脏组织NF-κB、MCP-1及TGF-β1蛋白的表达,实时荧光定量PCR法检
测肾组织NF-κB、MCP-1及TGF-β1 mRNA表达,光镜观察肾脏病理改变。结果与DN模型组比较,DN+NT组大鼠24 h尿蛋
白定量、肾脏组织中NF-κB、MCP-1和TGF-β1的蛋白及mRNA水平均显著增加,肾脏病理改变加重;NT抑制剂Ebselen可明显
减轻这些变化。结论硝基酪氨酸可上调DN大鼠肾脏组织NF-κB、MCP-1及TGF-β1 蛋白及其mRNA的表达,加重炎性反应,
促进DN的进展。
相似文献
因子-β1(TGF-β1)表达的影响,探讨其在DN发生发展中的作用机制。方法用链脲佐菌素腹腔注射法建立DN大鼠模型,造模
成功的大鼠随机分3组:DN模型组、DN+NT组和DN+NT+Ebselen组(NT抑制剂),另设正常对照组。各组分别干预8周后,观
察24 h尿蛋白定量变化,采用免疫组织化学染色检测肾脏组织NF-κB、MCP-1及TGF-β1蛋白的表达,实时荧光定量PCR法检
测肾组织NF-κB、MCP-1及TGF-β1 mRNA表达,光镜观察肾脏病理改变。结果与DN模型组比较,DN+NT组大鼠24 h尿蛋
白定量、肾脏组织中NF-κB、MCP-1和TGF-β1的蛋白及mRNA水平均显著增加,肾脏病理改变加重;NT抑制剂Ebselen可明显
减轻这些变化。结论硝基酪氨酸可上调DN大鼠肾脏组织NF-κB、MCP-1及TGF-β1 蛋白及其mRNA的表达,加重炎性反应,
促进DN的进展。
相似文献
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Objective Injured tubular reabsorption is highlighted as one of the causes of increased albuminuria in the early stage of diabetic nephropathy; however, the underlying mechanism has not been fully elucidated. In this study, we aimed to explore whether reducing inflammation and remodeling the insulin signaling pathway could improve albumin uptake of renal tubules.Methods 8-week-old male db/db mice (n=8), a type 2 diabetic nephropathy model, administered with nuclear factor kappa-B (NF-κB) inhibitor parthenolide (PTN, 1 mg/kg) intraperitoneally every other day for 8 weeks, were as the treatment group. Meanwhile, the age-matched male db/m mice (n=5) and db/db mice (n=8) were treated with saline as the control group and type 2 diabetic nephropathy group. When the mice were sacrificed, blood and urine were collected to examine homeostasis model assessment of insulin resistance (HOMA-IR) and urine albumin creatinine ratio, and kidney samples were used to analyze histopathologic changes with periodic acid-Schiff (PAS) staining, NF-κB p65, phosphorylation of AKT (p-AKT), amnionless and cubilin expressions with immunohistochemistry as well as western blot, and the albumin uptake of renal tubules by using immunofluorescence. In addition, HKC cells were divided into the insulin group treated with insulin alone, the TNF-α group treated with insulin and tumor necrosis factor (TNF-α), and the TNF-α+PTN group exposed to PTN, insulin and TNF-α. The levels of albumin uptake and expression levels of NF-κB p65, p-IRS-1/IRS-1, p-AKT/AKT, amnionless and cubilin in HKC cells were measured.Results Compared with the db/db group, the db/db+PTN group demonstrated decreased levels of HOMA-IR (36.83±14.09 vs. 31.07±28.05) and urine albumin creatinine ratio (190.3±7.3 vs. 143.0±97.6 mg/mmol); however, the differences were not statistically significant (P>0.05). Periodic acid-Schiff staining showed PTN could alleviate the glomerular hypertrophy and reduce the matrix in mesangial areas of db/db mice. The renal expression of NF-κB p65 was increased and p-AKT (s473) decreased in the db/db group compared with the db/m group (P<0.05). PTN significantly reduced the renal expression of NF-κB p65 and ameliorated the decline of p-AKT (s473) compared with the db/db group (P<0.05). Compared with the db/m group, the expression of amnionless and cubilin decreased and albumin uptake in tubules were reduced in the db/db group (P<0.05), and PTN could significantly increase the expression of cubilin (P<0.05), and improve albumin uptake in tubules. Insulin promoted albumin uptake and the expression of amnionless and cubilin in HKC cells (P<0.05). TNF-α stimulated the expression of NF-κB p65, increased p-IRS-1 (s307) and reduced p-AKT (s473) in HKC cells (P<0.05). In the TNF-α+PTN group, the expression of NF-κB p65 declined and p-IRS-1 (s307) and p-AKT (s473) were restored, compared with the TNF-α group (P<0.05). The expression of amnionless and cubilin decreased in the TNF-α group (P<0.05), and PTN could significantly increase the expression of cubilin (P<0.05).Conclusions Inflammation caused damage to insulin signaling, which reduced amnionless-cubilin expression and albumin uptake. PTN could reduce inflammation and remodel the impaired insulin signaling pathway, which promoted the expression of cubilin and albumin uptake. Our study can shed light on the role of inflammation in the reduction of albumin uptake of renal tubules in type 2 diabetic nephropathy. 相似文献
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目的 探讨血管紧张素Ⅱ受体阻滞剂(ARB)厄贝沙坦对2型糖尿病db/db小鼠心肌组织炎症反应的保护作用及其心脏保护机制.方法 10周龄db/db小鼠随机分成模型组、厄贝沙坦治疗组50 mg/(kg·d),同窝出生的10周龄非糖尿病db/+小鼠充当正常对照组.正常组,模型组灌服等体积生理盐水,厄贝沙坦治疗组灌服厄贝沙坦(溶于生理盐水),药物干预16周后,记录心脏质量、体质量,测定空腹血糖、血甘油三酯、血总胆固醇含量,对心脏行HE染色、Western blot、免疫组化和qPCR检测.结果 与正常组db/+小鼠相比,模型组db/db小鼠发生了肥胖、高血糖、高血脂(P<0.01);心肌组织肌纤维排列紊乱,间质增多,炎症细胞浸润;P-IкBα蛋白水平升高、IкBα蛋白水平降低,P-IкBα/IкBα升高(P<0.001);NF-кB(P65)活性增强,入核增加(P<0.001),且促炎细胞因子白细胞介素-6(IL-6)、肿瘤坏死因子α(TNF-α)mRNA水平升高(P<0.01),这些异常均与糖尿病心肌组织炎症反应升高有关.厄贝沙坦的慢性治疗改善心肌病理学变化,并改善了2型糖尿病db/db小鼠高血糖诱导的心肌组织炎症反应指标.结论 厄贝沙坦改善了2型糖尿病db/db小鼠心肌组织炎症反应,其机制可能与抑制心脏血管紧张素Ⅱ的作用和NF-кB信号通路有关. 相似文献
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目的观察雷公藤甲素治疗糖尿病肾病(DN)模型小鼠的疗效,并探讨其通过Toll-样受体(TLR)/核因子κB(NF-κB)信号通路对DN足细胞的作用机制。方法6只9周龄db/m和18只9周龄db/db雄性小鼠,按db/m正常对照组(等量0.9%生理盐水)、db/db DN对照组(等量0.9%生理盐水)、替米沙坦治疗组(5mg·kg^-1·d^-1)、雷公藤甲素组(50μg·kg^-1·d^-1)分组给药,治疗8周。记录各组小鼠一般情况、24h尿白蛋白定量、体质量、肾脏指数和血生化指标,光镜观察肾小球病变情况,免疫组化计算足细胞数量,Western blot检测肾脏足细胞相关蛋白Nephrin、Podocin以及肾脏组织TLR4和NF-κB蛋白定量表达。结果与DN对照组比较,雷公藤甲素组小鼠治疗后24h尿蛋白定量[(98.28±11.10)mg/24h比(239.89±44.26)mg/24h]、血清肌酐[(38.82±3.66)μmol/L比(45.32±7.63)μmol/L]、总胆固醇[(3.05±0.54)mmol/L比(4.00±0.67)mmol/L]及三酰甘油[(1.23±0.15)mmol/L比(2.09±0.48)mmol/L]均明显下降(P均<0.01),血清白蛋白水平上升[(39.21±4.33)g/L比(25.46±1.54)g/L,P<0.01],肾小球肥大和足细胞损伤减轻[(95.50±5.01)个/肾小球比(58.78±2.86)个/肾小球,P<0.05],Nephrin[(2.05±0.44)比(1.15±0.22)]、Podocin[(1.32±0.25)比(0.72±0.20)]蛋白表达量上升(P均<0.01),TLR4[(0.37±0.04)比(0.61±0.04)]和NF-κB[(0.41±0.05)比(0.76±0.06)]蛋白表达量下降(P均<0.01)。结论雷公藤甲素可能通过抑制TLR/NF-κB信号通路相关因子表达,减轻糖尿病肾病模型小鼠足细胞损伤,减低蛋白尿,保护肾功能,起到治疗糖尿病肾病的作用。 相似文献
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