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1.
旨在探究死亡受体Fas在镉致大鼠肾上腺嗜铬细胞瘤细胞（PC12）凋亡中的作用及其对线粒体通路的调控机制,用10 μmol·L-1镉处理Fas基因沉默的PC12细胞株12 h,通过Western blot检测BH3相互作用域死亡激动剂（BID）、半胱氨酸蛋白酶-9（caspase-9）、半胱氨酸蛋白酶-3（caspase-3）、多聚二磷酸腺苷核糖聚合酶（PARP）的活化情况,Bcl-2相关X蛋白（Bax）、B细胞淋巴瘤/白血病-2基因（Bcl-2）、凋亡诱导因子（AIF）、核酸内切酶G（Endo G）的表达情况,以及细胞色素C（Cyt C）在细胞内的分布情况,免疫荧光染色检测AIF核转位。结果显示,镉极显著上调tBID/BID比值和Bax/Bcl-2比值,诱导Cyt C从线粒体释放到细胞质,激活caspase-9、caspase-3和PARP,增加AIF和Endo G蛋白表达水平（P<0.01）,并诱导AIF核转位;沉默Fas极显著抑制镉引起的tBID/BID比值和Bax/Bcl-2比值升高,Cyt C从线粒体释放到胞浆,caspase-3、PARP蛋白活化和AIF、Endo G蛋白表达水平极显著升高（P<0.01）,显著抑制镉激活的caspase-9（P<0.05）,并抑制AIF核转位。综上表明,Fas通过调控线粒体通路参与镉致PC12细胞凋亡。 相似文献
2.
线粒体与细胞凋亡的关系 总被引：1，自引：0，他引：1
线粒体是细胞能量合成和贮存及物质代谢、能量转化的重要场所,不仅能诱导细胞凋亡,还是细胞凋亡的执行者。在细胞凋亡过程中,与凋亡相关的活性物质,如细胞色素C（Cyt·c）、凋亡诱导因子（AIF）、B细胞淋巴瘤基因-2（Bcl-2）等从线粒体释放到膜间隙中,使线粒体膜通透性转换孔（mitochondrion permeability transition pore,MPTP）开放,削弱线粒体膜两侧的质子梯度,导致线粒体膜电位降低,诱导细胞凋亡。同时线粒体内的Bcl-2家族对细胞凋亡具有调节作用。笔者就MPTP、Cyt·c、AIF、Bcl-2与细胞凋亡的关系进行了综述。 相似文献
3.
《中国兽医学报》2014,(10):1672-1675
为研究α-硫辛酸(α-lipoid acid,α-LA)对镉致PC12细胞线粒体凋亡途径的保护作用。10μmol/L醋酸镉和100μmol/Lα-LA单独或联合作用PC12细胞24h,流式细胞术检测细胞凋亡率,Western blot法检测cleaved caspase-3、Bcl-2和Bax蛋白的表达量和细胞色素C(cytochrome c,Cyt C)的释放。结果表明,镉引起细胞凋亡率上升,cleaved caspase-3表达上调,Bcl-2/Bax比值极显著下降(P<0.01),Cyt C从线粒体释放进入胞浆中(P<0.01);α-LA联合Cd处理,细胞凋亡率下降,cleaved caspase-3表达量下降,Bcl-2/Bax比值升高,并且能抑制线粒体中Cyt C的释放。表明α-LA对于镉诱导的PC12细胞凋亡的线粒体途径具有一定的保护作用。 相似文献
4.
为探讨Fas/FasL在镉致PC12细胞凋亡线粒体通路中的作用,用10μmol/L CdAc_2和10 mg/L Anti-FasL单独或联合处理PC12细胞12 h,通过Hoechst 33258染色检测细胞的凋亡形态学变化,流式细胞术检测线粒体膜电位的变化情况,Western blot检测BID、caspase-9、caspase-3、PARP的活化情况,Bax和Bcl-2的表达情况。结果:与对照组相比,Cd处理组细胞凋亡率、tBID/BID比值、Bax/Bcl-2比值、cleaved caspase-9、cleaved caspase-3、cleaved PARP蛋白表达量均极显著升高(P0.01),线粒体膜电位极显著降低(P0.01);与Cd处理组相比,Anti-FasL与Cd共处理组细胞凋亡率、tBID/BID比值、Bax/Bcl-2比值、cleaved caspase-9、cleaved caspase-3、cleaved PARP蛋白表达量均极显著降低(P0.01),线粒体膜电位极显著升高(P0.01)。结果表明,Fas/FasL在镉致PC12细胞凋亡线粒体通路中具有重要作用。 相似文献
5.
在细胞凋亡的过程中,线粒体起着主要的作用。线粒体外膜(OMM)上的VDAC-ANT复合物是线粒体通透性转换孔(PTP)的主要成分,调节着膜两侧的电位,是线粒体凋亡蛋白释放的主要通道。线粒体中细胞色素C(Cyt C)的释放可通过一种新的通道MAC直接进入胞质,而且OMM的结构不发生破裂。另外,其他因子诸如Bcl-2族因子、Cyt C、AIF等能够直接或间接地调节PTP或线粒体凋亡通道(MAC),令线粒体的通透性改变,将各种促凋亡因子释放,从而激活caspase的水解反应,诱导细胞的凋亡。 相似文献
6.
《中国兽医学报》2020,(8)
为在细胞水平探讨皮质酮(CORT)诱导HT22细胞凋亡的机制,以模拟冷应激过程中机体分泌的糖皮质激素对海马神经元的作用。试验组HT22细胞用500μmol/L CORT处理3 h,对照组不予处理。用CCK8法检测CORT对HT22细胞活力的影响,Annexin/PI流式细胞术检测细胞凋亡率。为了进一步研究CORT引起的海马神经元凋亡是否是由线粒体凋亡通路介导的,用JC-1探针检测线粒体膜电位的变化,免疫蛋白印迹(Western blot)检测凋亡相关蛋白细胞色素c(Cyt-c)、Bcl-2、Bax、Caspase-3的表达。结果显示,与对照组相比,500μmol/L CORT处理组细胞生存率显著降低,细胞凋亡率显著升高,线粒体膜电位显著下降,Cyt-c、Bax/Bcl-2及活化的Caspase-3表达水平显著升高。结果表明,500μmol/L CORT处理3 h会导致HT22细胞凋亡,并且线粒体凋亡通路在该过程中发挥重要作用。 相似文献
7.
线粒体与细胞凋亡 总被引：7，自引：0，他引：7
细胞凋亡是一种由基因控制的细胞自杀性死亡过程,是机体维持自身稳定的一种基本生理机制。机体通过细胞凋亡清除损伤、衰老与突变的细胞,维持生理平衡。通过对细胞凋亡的研究发现,线粒体在调节细胞凋亡中发挥着关键作用。尤其是被称为细胞凋亡主开关的线粒体通透性改变孔(MitochondrionPermeabilitytransitionPore,MPTP),它是细胞色素C、Smac、AIF等凋亡诱导因子的主要来源。本文以MPTP的开放、细胞色素C、AIF在细胞凋亡中的作用以及Bcl-2家族对细胞凋亡的调控做一综述,以便广大读者能系统地了解线粒体在细胞凋亡中的作用。 相似文献
8.
以不同浓度的玉米赤霉烯酮(Zearalenone,ZEA)对大鼠睾丸间质细胞(Leydig)细胞进行染毒,采用噻唑蓝比色法观察了ZEA对Leydig细胞活力的影响;流式细胞术分析检测了ZEA对细胞的凋亡率、线粒体膜电位变化的影响;Western blotting等技术检测了Bax、Bcl-2、caspase-3、caspase-9、PARP蛋白的表达情况。结果显示,ZEA可明显抑制睾丸Leydig细胞的活力(染毒各组与对照组比较P<0.05),40mg/L染毒组相对活力为40.67%;与对照组比较,5、10、20mg/L ZEA染毒组睾丸Leydig细胞凋亡率均极显著升高(P<0.05),呈明显剂量关系;线粒体膜电位变化测定显示,各染毒组与对照组比,线粒体膜电位均下降(P<0.05),且有明显的剂量关系;Western blotting分析显示,与对照组比较,5、10、20mg/L ZEA染毒组Bax、caspase-9、caspase-3、PARP蛋白表达均上调,bcl-2蛋白表达均下调。结果表明,ZEA能诱导大鼠睾丸间质细胞发生凋亡,Bax、Bcl-2、caspase-9、caspase-3等基因参与ZEA诱导Leydig细胞凋亡的调控。 相似文献
9.
为探讨玉米赤霉烯酮(zearalenon,ZEA)雄性生殖毒性作用机理,研究ZEA诱导大鼠睾丸支持细胞(sertoli cell,SC)的凋亡途径,试验选取大鼠原代SC为研究材料,用不同浓度ZEA(0、5、10、20μmol/L)处理SC 24 h后,采用实时荧光定量PCR法检测Bax和Bcl-2 mRNA表达水平;用Western blotting法检测Bax、Bcl-2等线粒体凋亡途径相关蛋白表达;同时检测了20μmol/L ZEA联合Caspase-8抑制剂(Z-IETD-FMK)处理对SC凋亡率和线粒体凋亡相关蛋白的影响。结果显示,与对照组相比,20μmol/L ZEA组细胞Bcl-2转录水平显著下降(P<0.05),Bax转录水平显著上升(P<0.05);10、20μmol/L ZEA组Bax/Bcl-2比值及Cyto-CytC、Cleaved Caspase-9、Cleaved Caspase-3表达量极显著上升(P<0.01),而Mito-CytC表达量极显著下降(P<0.01);与ZEA组相比,ZEA与Z-IETD-FMK联合处理可使ZEA诱导的SC凋亡率极显著下降(P<0.01),tBid/Bid、Bax/Bcl-2、Cyto-CytC、Cleaved-Caspase3、Cleaved-Caspase9蛋白表达显著或极显著下降(P<0.05;P<0.01),而Mito-CytC表达量极显著上升(P<0.01)。综合试验结果,ZEA能够通过线粒体途径诱导大鼠SC发生凋亡。 相似文献
10.
《中国兽医学报》2017,(10):1957-1963
为探讨中药复方参术汤干预猪传染性胃肠炎病毒(transmissible gastroenteritis virus,TGEV)诱导猪小肠黏膜上皮细胞(SIEC)凋亡的机制。本试验用TGEV感染SIEC进行体外试验。试验分为复方参术汤组、对照组、TGEV组、苦参碱组,分别于加药后2,4,8,12,24,48,72h收集样本,应用qRT-PCR检测Bcl-2与Bax mRNA转录水平,Western blot检测Bcl-2、Bax、Bid、Cyt-c、Caspase-9和Caspase-3的蛋白表达水平。结果显示,与TGEV组相比,复方参术汤下调TGEV感染SIEC的Bax、Caspase-9、Caspase-3、Cyt c及Bid蛋白表达;复方参术汤极显著上调Bcl-2mRNA的转录(P<0.01),极显著下调Bax mRNA的转录(P<0.01)。结果表明,复方参术汤能够抑制引起细胞凋亡的线粒体通路,从而预防TGEV引起的SIEC凋亡。 相似文献
11.
Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1986,27(9):324-328
In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%).
Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada.
相似文献12.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(6):504-508
In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%). 相似文献
13.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1985,26(10):323-327
In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal.
Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection.
相似文献14.
15.
Slocombe JO Villeneuve A 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(10):630-633
In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium. 相似文献
16.
In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated.
Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively.
相似文献17.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(8):641-646
In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%). 相似文献
18.
Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):491-495
In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%).
Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada.
相似文献19.
20.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1984,25(9):347-350
In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario.
Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously.
相似文献