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1.
目的探讨罗格列酮抑制糖基化终产物(AGEs)诱导大鼠血管平滑肌细胞(VSMCs)钙化的可能机制。方法在含10 mmol·L~(-1)β-甘油磷酸培养液中加入200 mg·L~(-1)的AGEs及不同浓度(10~(-7)~10~(-5)mol·L~(-1))的罗格列酮体外培养VSMCs,采用甲-酚酞络合酮方法测定细胞钙含量,real time-PCR检测肿瘤坏死因子α(Tnf-α)、白细胞介素6(Il-6)及糖基化终产物受体(Rage)mRNA表达,Western blotting检测Rage蛋白表达,ELISA法检测细胞上清Tnf-α、Il-6水平。结果 AGEs可使VSMCs钙含量增加,Tnf-α、Il-6及Rage mRNA和蛋白表达增加(P<0.01);罗格列酮组均可降低VSMCs细胞层钙含量,抑制上述影响(P<0.05)。结论罗格列酮可能通过抑制VSMCs Rage表达,降低Tnf-α、Il-6表达和分泌,减轻AGEs诱导的VSMCs钙化。 相似文献
2.
Objective To investigate the effects of rosiglitazone on the proliferation,connective tissue growth factor and Smad expression in cultured cardiac fibroblasts induced by advanced glycosylation end-products (AGEs).Methods After being treated with various amounts of rosiglitazone,the cultured neonatal rat cardiac fibroblasts were incubated with AGEs.The status of cardiac fibroblasts proliferation and cell cycle were detected by 3-(4,5-dimethyhhiazol-2-yl) -2,5-diphenyl tetrazolium bromide (MTI) assay and flow cytometry.Furthermore,ELISA technique was applied to identify the level of TGF-β1.The protein expressions of CTGF and Smad in cardiac fibroblasts of neonatal SD rats were detected with Western blotting.Results The exposure of cardiac fibroblasts to AGEs at doses of 0-200 mg/L induced a dose-dependent increase in cell proliferation.At the concentration of rosiglitazooe (0.1,1,and 10 μmol/L),the cell proliferation was reduced compared with 200 mg/L AGEs group by O.823±0.072,0.785±0.060,0.601±0.081 vs 0.981±0.049,respectively (P < 0.05).The increased levels of TGF-β1 in supematants of cultured cardiac fibroblasts stimulated by AGEs were inhibited by rosiglitazone at the concentrations of 0.1,1,10μmol/L by 257.77±9.09,230.29±6.56,200.84±10.26 vs 300.68±8.56,respectively (vs 200 mg/L AGEs,P<0.01).Western blot indicated that pretreatment with rosiglitazone (0.1,1,and 10 μmol/L) inhibited CTGF protein production in a dose-dependent by 0.769±0.108,0.590±0.095,0.534±0.115 vs 1.021±0.113,respectively (vs 200 mg/L AGEs,P<0.01).It was also demonstrated that pretreatment with rosiglitazone (1 and 10 μmol/L) inhibited Smad2 protein production by 0.424±0.059,0.396±O.080 vs 0.572±0.073,respectively (vs 200 mg/L AGEs,P < 0.05 or P < 0.01).Meanwhile pretreatment with rosiglitazone (1 and 10 μmol/L) inhibited Smad4 protein production by 0.580±0.063,0.556±0.051 vs 0.672±0.059,respectively (vs 200 mg/L AGEs,P < 0.05 or P < 0.01).Conclusions The findings suggest that AGEs promote the proliferation of cardiac fibroblasts and stimulate the protein production of Smad and CTGF of cardiac fibroblasts.Rosiglitazone inhibits the above reaction.These results indicate that CTGF/Smad pathway may play an important role in the protective effect of rosiglitazone on myocardial fibrosis. 相似文献
3.
目的:本研究旨在探讨超声联合一氧化氮(NO)微泡的作用对大鼠心肌组织局部基质衍生因子-1(SDF-1)的影响,及其对心肌组织作用的安全性?方法:将32只SPF级SD雄性大鼠随机分为4组,每组8只?第1?2?3组分别经尾静脉输入1 ml的NO微泡?普通脂质微泡以及PBS,并采用频率为1 MHz?强度为1 W/cm2的超声辐照大鼠心前区,辐照时间为10 min;第4组为空白对照组?4 h后每组处死4只大鼠,留取心肌组织进行HE染色,观察局部的炎症反应情况;同时留取血清标本用于检测肌酸激酶(CK),乳酸脱氢酶(LDH)和肌钙蛋白I(TnI)的含量?1周后处死剩余大鼠,取心肌组织进行RT-PCR和Western blot分别检测SDF-1的基因及蛋白相对表达量?结果:辐照4 h后留取心肌组织行HE染色显示各组均可见少量炎性细胞浸润,组间没有明显差异;血清学指标检测显示,第1组与第2组血清CK和LDH高于第3组和第4组,且差异有统计学意义(P < 0.05);第1组血清TnI低于第2组,但高于第3组和第4组,且差异有统计学意义(P < 0.05);辐照1周后留取的心肌组织行RT-PCR和Western blot分析结果均显示第1组SDF-1相对表达量最多,各组间进行两两比较,差异均有统计学意义(P < 0.05)?结论:超声联合NO微泡辐照大鼠心肌组织,与内含全氟显气体的普通脂质微泡一样,对心肌组织无明显破坏;但能使大鼠心肌组织SDF-1表达增加,其程度高于应用超声联合普通脂质微泡,因此,NO微泡应用于干细胞归巢将优于目前普通脂质微泡? 相似文献
4.
目的:探讨体外培养条件下糖基化终产物(AGEs)对人肾小球系膜细胞结缔组织生长因子(CTGF)及纤维连接蛋白(FN)基因表达的影响。方法:用不同浓度体外制备的AGEs干预系膜细胞及同一浓度的AGEs干预细胞不同时间。应用RT-PCR检测细胞中CTGF和FN的mRNA水平。结果:随着AGEs干预浓度的增加或干预时间的延长,系膜细胞CTGF和FNmRNA水平与对照组相比显著上升。结论:AGEs可导致人肾小球系膜细胞CTGF和FNmRNA的表达增加,在糖尿病肾病的发生、发展中起一定作用。 相似文献
5.
由江苏省医学会微循环专科分会主办、东南大学附属中大医院协办的江苏省医学会微循环医学2008年学术会议,于5月16日~18日在美丽的六朝古都南京顺利召开。 相似文献
6.
晚期糖基化终末产物(AGEs)是蛋白质、脂质或核酸等大分子物质的非酶糖基化产物。其在体内有多种不同的存在形式,研究最多的是羧甲基赖氨酸(CML),它是AGEs的主要抗原表位,体内分布广泛,在糖尿病并发症等病变和衰老的发生、发展中有重要作用。 相似文献
7.
目的 以C57BL/6J小鼠为载体,以烟酸为干预药物,探索脂肪组织、血脂和主动脉粥样硬化三者间的潜在关系.方法 将28只雄性C57BL/6J小鼠随机分为对照组(n=8)、模型组(n=10)和烟酸干预组(n=10),分别给予普通饲料、高胆固醇饲料、高胆固醇饲料+1%烟酸(w/w)处理.14周后酶法和免疫比浊法检测血清三酰甘油(TG)、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)和载脂蛋白A-I(apoA-I)的含量;HE染色观察主动脉病理形态学改变;高效液相色谱法检测主动脉壁和腹股沟皮下脂肪组织胆固醇含量:RT-PCR检测腹股沟皮下脂肪组织LXRα、ABCA1和ABCG1 mRNA的表达.结果 对照组、模型组和烟酸干预组脂肪组织胆固醇含量分别为(3.13±0.19)、(20.81±1.97)和(4.00±0.81)mg/g;相对于模型组,烟酸干预可分别上调脂肪组织胆固醇外流调控子LXRα、ABCA1和ABCG1 mRNA 144%、47.3%和73.8%,降低血清TG、TC和LDL-C而升高HDL-C和apoA-I;Pearson相关分析显示动脉壁胆固醇含量与内膜厚度/中膜厚度比值正相关(r=0.58,P<0.05);烟酸干预组血管壁良性重塑,内膜变薄、内膜厚度/中膜厚度比值降低,内皮下间隙脂质沉积尤其是胆固醇蓄积减少.结论 烟酸干预促进了外周脂肪组织的胆固醇逆向转运,使得血液中脂质谱发生变化,进而影响了动脉壁内皮下间隙脂质尤其是胆固醇的蓄积,使血管壁发生良性重塑、动脉粥样硬化斑块消退. 相似文献
8.
目的:探讨羧甲基赖氨酸( CML)对外周血单核细胞破骨样转化的影响。方法:从外周血分离提取单核细胞,分为3组:细胞核因子κB受体活化因子配基( RANK-L)+巨噬细胞集落刺激因子( M-CSF)诱导组( A组),CML+RANK-L+M-CSF干预组( B组),空白对照组( C组)。利用RANK-L和M-CSF诱导其破骨样转化,每天通过倒置显微镜观察细胞生长形态及计算细胞核个数,培养8d后通过抗酒石酸酸性磷酸酶(TRAP)染色法观察破骨样细胞的形成,Western blotting 检测破骨细胞标志物组织蛋白酶K蛋白表达。结果:随着培养时间的延长,A组TRAP阳性多核细胞数明显增加,B组TRAP阳性多核细胞数较A组明显减少(P<0.05),B组组织蛋白酶K表达亦较A组明显降低(P<0.05)。结论:CML能够抑制外周血单核细胞向破骨样细胞转化。 相似文献
9.
目的:利用科研验证临床的办法,探究中医古方治疗现代疾病的疗效和安全性,从而为拓展古方新用,为新病找到新法,验证中医经方“小柴胡汤合当归芍药散”治疗桥本氏甲状腺炎的临床疗效。方法:181例桥本氏甲状腺炎患者随机分为对照组(90例)与试验组(91例)。对照组单独采用甲状腺素片口服,试验组予甲状腺素片加小柴胡汤合当归芍药散原方治疗。观察两组桥本氏甲状腺炎患者治疗前后甲状腺功能指标游离三碘甲状腺原氨酸(Free Triiodothyronine,FT3)、游离甲状腺素(Free Thyroxine,FT4)、促甲状腺激素(Thyroid Stimulating Hormone,TSH),免疫学指标血清甲状腺球蛋白抗体(Thyroglobulin Antibody,Tg Ab)、甲状腺过氧化物酶抗体(Thyroidperoxidase Antibody,TPOAb)以及中医证候积分的变化,并观察中药组方的安全性。结果:经过3个月的治疗,试验组总有效率显著高于对照组(P <0.01);两组中医证候积分较本组治疗前明显下降(P <0.05),试验组中医证候积分较对照组下降更显著(P &l... 相似文献
10.
Objective To investigate the effects of rosiglitazone on the proliferation,connective tissue growth factor and Smad expression in cultured cardiac fibroblasts induced by advanced glycosylation end-products (AGEs).Methods After being treated with various amounts of rosiglitazone,the cultured neonatal rat cardiac fibroblasts were incubated with AGEs.The status of cardiac fibroblasts proliferation and cell cycle were detected by 3-(4,5-dimethyhhiazol-2-yl) -2,5-diphenyl tetrazolium bromide (MTI) assay and flow cytometry.Furthermore,ELISA technique was applied to identify the level of TGF-β1.The protein expressions of CTGF and Smad in cardiac fibroblasts of neonatal SD rats were detected with Western blotting.Results The exposure of cardiac fibroblasts to AGEs at doses of 0-200 mg/L induced a dose-dependent increase in cell proliferation.At the concentration of rosiglitazooe (0.1,1,and 10 μmol/L),the cell proliferation was reduced compared with 200 mg/L AGEs group by O.823±0.072,0.785±0.060,0.601±0.081 vs 0.981±0.049,respectively (P < 0.05).The increased levels of TGF-β1 in supematants of cultured cardiac fibroblasts stimulated by AGEs were inhibited by rosiglitazone at the concentrations of 0.1,1,10μmol/L by 257.77±9.09,230.29±6.56,200.84±10.26 vs 300.68±8.56,respectively (vs 200 mg/L AGEs,P<0.01).Western blot indicated that pretreatment with rosiglitazone (0.1,1,and 10 μmol/L) inhibited CTGF protein production in a dose-dependent by 0.769±0.108,0.590±0.095,0.534±0.115 vs 1.021±0.113,respectively (vs 200 mg/L AGEs,P<0.01).It was also demonstrated that pretreatment with rosiglitazone (1 and 10 μmol/L) inhibited Smad2 protein production by 0.424±0.059,0.396±O.080 vs 0.572±0.073,respectively (vs 200 mg/L AGEs,P < 0.05 or P < 0.01).Meanwhile pretreatment with rosiglitazone (1 and 10 μmol/L) inhibited Smad4 protein production by 0.580±0.063,0.556±0.051 vs 0.672±0.059,respectively (vs 200 mg/L AGEs,P < 0.05 or P < 0.01).Conclusions The findings suggest that AGEs promote the proliferation of cardiac fibroblasts and stimulate the protein production of Smad and CTGF of cardiac fibroblasts.Rosiglitazone inhibits the above reaction.These results indicate that CTGF/Smad pathway may play an important role in the protective effect of rosiglitazone on myocardial fibrosis. 相似文献