目的:探讨石榴花水提物(pomegranate flower water extract,PFW)对2型糖尿病小鼠肝脏胰岛素信号传导的影响及机制。方法:将C57BL/6J随机分为正常组、模型组、二甲双胍组(Met)、石榴花水提物低剂量组(PFWL)和石榴花水提物高剂量组(PFWH)...目的:探讨石榴花水提物(pomegranate flower water extract,PFW)对2型糖尿病小鼠肝脏胰岛素信号传导的影响及机制。方法:将C57BL/6J随机分为正常组、模型组、二甲双胍组(Met)、石榴花水提物低剂量组(PFWL)和石榴花水提物高剂量组(PFWH)。连续给药11周后,称小鼠体质量,检测空腹血糖(FBG)、胰岛素(INS)、甘油三酯(TG)和总胆固醇(TC)的含量,计算胰岛素抵抗指数(HOMA-IR);苏木素-伊红(HE)染色观察肝组织病理变化;Western blot法检测肝组织中胰岛素受体底物1(IRS1)、p-IRS1(Ser307)、蛋白激酶B(AKT)、p-AKT(Ser473)、糖原合成酶激酶-3β(Gsk3β)、p-Gsk3β(S9)、芳香烃受体(AhR)、磷脂酰乙醇胺N-甲基转移酶(PEMT)、Bcl-2/腺病毒E1B-19kDa相互作用蛋白3(BNIP3)蛋白表达。结果:与模型组比较,PFWH组FBG、INS、HOMA-IR、TG和TC含量极显著降低(P<0.01);PFWH组小鼠肝细胞内脂肪滴明显减少;PFWH组极显著升高肝脏中IRS1、p-AKT(Ser473)/AKT、p-Gsk3β(S9)/Gsk3β、BNIP3蛋白表达(P<0.01),极显著降低p-IRS1(Ser307)/IRS1、AHR、PEMT蛋白表达(P<0.01)。结论:PFW可能通过调节AHR/BNIP3抑制肝脏脂质沉积,改善p-IRS1(Ser307)/p-AKT(Ser473)/p-GSK3β(S9)胰岛素信号通路转导。展开更多
目的丁苯酞氯化钠注射液后处理对X连锁凋亡抑制蛋白(X-inhibitor of apoptosis,XIAP)、Bcl-2/腺病毒E1B19k Da相互作用蛋白3(Bcl-2/adenovirus E1B19k Da interacting protein 3,BNIP3)的作用研究甚少。文中旨在观察丁苯酞氯化钠注射液...目的丁苯酞氯化钠注射液后处理对X连锁凋亡抑制蛋白(X-inhibitor of apoptosis,XIAP)、Bcl-2/腺病毒E1B19k Da相互作用蛋白3(Bcl-2/adenovirus E1B19k Da interacting protein 3,BNIP3)的作用研究甚少。文中旨在观察丁苯酞氯化钠注射液后处理对局灶性脑缺血再灌注损伤(ischemia reperfusion,IR)大鼠缺血侧海马CA1区XIAP、BNIP3表达的影响,探讨丁苯酞氯化钠注射液的脑保护机制。方法将清洁级雄性SD大鼠65只按随机数字表法分为假手术组(n=13)、IR组(n=13)、丁苯酞组(n=39),丁苯酞组按照剂量不同分为低剂量、中剂量和高剂量亚组,每组13只。IR组:采用改良线栓法制作大鼠大脑中动脉IR模型(缺血2 h,再灌注24 h)。低、中、高剂量亚组在大鼠缺血2 h后,予腹腔内分别注射2、4、6 mg/kg丁苯酞氯化钠注射液,余步骤同IR组。假手术组:栓线插入深度<10 mm,余步骤同IR组。各组于再灌注24 h处死大鼠,分别通过Zealonga法、TTC染色、TUNEL法观察各组大鼠的神经功能缺损评分、脑梗死体积、缺血侧海马CA1区凋亡阳性细胞数,通过免疫组化染色及RT-PCR法观察XIAP和BNIP3阳性细胞数及其mRNA的表达。结果丁苯酞低、中、高剂量亚组神经功能缺损评分均小于IR组(P<0.05),且各亚组之间比较差异有统计学意义(P<0.05)。低剂量亚组脑梗死体积大于中剂量亚组和高剂量亚组(P<0.05)。丁苯酞低、中、高剂量亚组海马CA1区凋亡细胞数逐渐减小,且均小于IR组(P<0.05)。IR组XIAP、BNIP3阳性细胞表达[(22.31±0.94)、(60.13±2.59)个/HP]较假手术组[(3.07±1.43)、(5.78±0.44)个/HP]明显增多(P<0.05);与IR组比较,丁苯酞低、中、高剂量亚组XIAP阳性细胞数[(28.70±1.18)、(32.79±0.88)、(37.01±1.24)个/HP]逐渐增加(P<0.05),BNIP3阳性细胞数[(52.07±1.02)、(40.30±2.00)、(31.04±0.43)个/HP]逐渐减少(P<0.05)。与IR组比较,丁苯酞低、中、高剂量亚组XIAP mRNA逐渐增加、BNIP3 mRNA逐渐减少(P<0.05)。结论丁苯酞氯化钠注射液后处理对大鼠IR具有神经保护作用,其机制与影响XIAP、BNIP3的表达有关,且XIAP、BNIP3阳性表达量与丁苯酞氯化钠注射液存在剂量依赖关系。展开更多
2M NaCl-insoluble fraction of rat ventral Prostate chromatin(residual proteins)contain proteins able to interact specifically with androgen-receptor complex and is ,therefore,a part of the aceptor complex.Among residu...2M NaCl-insoluble fraction of rat ventral Prostate chromatin(residual proteins)contain proteins able to interact specifically with androgen-receptor complex and is ,therefore,a part of the aceptor complex.Among residual proteins a 98 KDa protein has been found which binds significantly to a genomic fiagment containing an androgen-regulated gene coding for a 22 KDa protein The biological significance of this binding in androgen action need to be further studied.A mini-plasmid clone containing 22 KDa protein coding sequence was cloned into charon 4A genomic library from which a 5.7 Kb genomic fragment was isolated,identified by hybridization with a 5' and a 3' cDNA probes,and shown to contain the 3' flanking sequence.Restriction enzyme treatment of this fragment yielded a 4.7 Kb restriction fragmwent representing the 5' upstream region and a 1.0 Kb containing part of the coding sequence.Deletion studies indicated that the 97 KDa protein bound only to a subclone of about 300 bp segment .Furthermore,gel shifting experiment supported its DNA-protein binding.展开更多
文摘目的:探讨石榴花水提物(pomegranate flower water extract,PFW)对2型糖尿病小鼠肝脏胰岛素信号传导的影响及机制。方法:将C57BL/6J随机分为正常组、模型组、二甲双胍组(Met)、石榴花水提物低剂量组(PFWL)和石榴花水提物高剂量组(PFWH)。连续给药11周后,称小鼠体质量,检测空腹血糖(FBG)、胰岛素(INS)、甘油三酯(TG)和总胆固醇(TC)的含量,计算胰岛素抵抗指数(HOMA-IR);苏木素-伊红(HE)染色观察肝组织病理变化;Western blot法检测肝组织中胰岛素受体底物1(IRS1)、p-IRS1(Ser307)、蛋白激酶B(AKT)、p-AKT(Ser473)、糖原合成酶激酶-3β(Gsk3β)、p-Gsk3β(S9)、芳香烃受体(AhR)、磷脂酰乙醇胺N-甲基转移酶(PEMT)、Bcl-2/腺病毒E1B-19kDa相互作用蛋白3(BNIP3)蛋白表达。结果:与模型组比较,PFWH组FBG、INS、HOMA-IR、TG和TC含量极显著降低(P<0.01);PFWH组小鼠肝细胞内脂肪滴明显减少;PFWH组极显著升高肝脏中IRS1、p-AKT(Ser473)/AKT、p-Gsk3β(S9)/Gsk3β、BNIP3蛋白表达(P<0.01),极显著降低p-IRS1(Ser307)/IRS1、AHR、PEMT蛋白表达(P<0.01)。结论:PFW可能通过调节AHR/BNIP3抑制肝脏脂质沉积,改善p-IRS1(Ser307)/p-AKT(Ser473)/p-GSK3β(S9)胰岛素信号通路转导。
文摘2M NaCl-insoluble fraction of rat ventral Prostate chromatin(residual proteins)contain proteins able to interact specifically with androgen-receptor complex and is ,therefore,a part of the aceptor complex.Among residual proteins a 98 KDa protein has been found which binds significantly to a genomic fiagment containing an androgen-regulated gene coding for a 22 KDa protein The biological significance of this binding in androgen action need to be further studied.A mini-plasmid clone containing 22 KDa protein coding sequence was cloned into charon 4A genomic library from which a 5.7 Kb genomic fragment was isolated,identified by hybridization with a 5' and a 3' cDNA probes,and shown to contain the 3' flanking sequence.Restriction enzyme treatment of this fragment yielded a 4.7 Kb restriction fragmwent representing the 5' upstream region and a 1.0 Kb containing part of the coding sequence.Deletion studies indicated that the 97 KDa protein bound only to a subclone of about 300 bp segment .Furthermore,gel shifting experiment supported its DNA-protein binding.
