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Natural variation in the cytochrome c oxidase subunit 5B OsCOX5B regulates seed vigor by altering energy production in rice
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作者 Chengwei Huang Zhijuan Ji +7 位作者 Qianqian Huang Liling Peng Wenwen Li Dandan Wang Zepeng Wu Jia Zhao Yongqi He Zhoufei Wang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2024年第9期2898-2910,共13页
Seed vigor is a crucial trait for the direct seeding of rice.Here we examined the genetic regulation of seed vigor traits in rice,including germination index(GI)and germination potential(GP),using a genome-wide associ... Seed vigor is a crucial trait for the direct seeding of rice.Here we examined the genetic regulation of seed vigor traits in rice,including germination index(GI)and germination potential(GP),using a genome-wide association study approach.One major quantitative trait locus,qGI6/qGP6,was identified simultaneously for both GI and GP.The candidate gene encoding the cytochrome c oxidase subunit 5B(OsCOX5B)was validated for qGI6/qGP6.The disruption of OsCOX5B caused the vigor traits to be significantly lower in Oscox5b mutants than in the japonica Nipponbare wild type(WT).Gene co-expression analysis revealed that OsCOX5B influences seed vigor mainly by modulating the tricarboxylic acid cycle process.The glucose levels were significantly higher while the pyruvic acid and adenosine triphosphate levels were significantly lower in Oscox5b mutants than in WT during seed germination.The elite haplotype of OsCOX5B facilitates seed vigor by increasing its expression during seed germination.Thus,we propose that OsCOX5B is a potential target for the breeding of rice varieties with enhanced seed vigor for direct seeding. 展开更多
关键词 cytochrome c oxidase natural variation RIcE seed vigor
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Cytochrome C在大鼠SAH后早期脑损伤的表达及意义
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作者 杨煌强 魏俊怀 江志贤 《医学理论与实践》 2023年第15期2521-2524,2528,共5页
目的:本实验采用枕大池注血法建立大鼠蛛网膜下腔出血动物模型,通过研究细胞色素C(Cytochrome C)在动物体内和体外表达变化,探讨c-Jun氨基末端激酶(JNK)信号传导通路是否参与了蛛网膜下腔出血(SAH)后早期脑损伤(EBI)的发生、发展,并进... 目的:本实验采用枕大池注血法建立大鼠蛛网膜下腔出血动物模型,通过研究细胞色素C(Cytochrome C)在动物体内和体外表达变化,探讨c-Jun氨基末端激酶(JNK)信号传导通路是否参与了蛛网膜下腔出血(SAH)后早期脑损伤(EBI)的发生、发展,并进一步探讨JNK在EBI中的作用及意义。方法:随机选取120只大鼠采用枕大池注血法建立标准SAH动物模型。随机将其分为6组:分别为正常组(n=20),假手术组(Sham组,n=20),SAH组(n=20),SAH+DMSO(二甲基亚砜)组(n=20),SAH+SP600125(10mg/kg)组(n=20)和SAH+SP600125(30mg/kg)组(n=20)。利用TUNEL显色法检测大脑皮层区域细胞凋亡现象情况;运用Western Blotting法动态检测脑组织Cytochrome C蛋白表达情况。结果:(1)蛛网膜下腔出血后大鼠神经行为功能异常;Western Blot法检测大脑皮质Cytochrome C表达增加;蛛网膜下腔出血后24h,通过TUNEL检测大脑皮层区脑组织细胞的异常染色、结构紊乱等凋亡征象。(2)SP600125干预后,大鼠神经行为功能异常有所好转;检测大脑皮质Cytochrome C值减少,实验组大脑皮层细胞凋亡征象减少。结论:神经元细胞凋亡途径是蛛网膜下腔出血后早期脑损伤过程中重要的病理生理机制;JNK信号传导通路可能通过诱导细胞凋亡而促进早期脑损伤的发生、发展;SP600125可能通过抑制JNK信号传导通路中Cytochrome C蛋白表达从而保护蛛网膜下腔出血后造成的早期脑损伤。 展开更多
关键词 细胞色素c JNK 细胞凋亡 早期脑损伤 蛛网膜下腔出血
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基于线粒体COⅠ基因序列的梭鲈野生群体遗传结构
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作者 鲁翠云 孙志鹏 +4 位作者 曹顶臣 耿龙武 那荣滨 吴学工 郑先虎 《水产学报》 CSCD 北大核心 2024年第1期82-92,共11页
为了解梭鲈种群的遗传结构,实验利用线粒体细胞色素c氧化酶Ⅰ亚基(COⅠ)基因部分序列分析了中国6个和中亚2个群体的遗传差异,并与欧洲群体的单倍型序列进行了比较。结果在640 bp的COⅠ基因序列中检测到5个变异位点,定义了7种单倍型,发现... 为了解梭鲈种群的遗传结构,实验利用线粒体细胞色素c氧化酶Ⅰ亚基(COⅠ)基因部分序列分析了中国6个和中亚2个群体的遗传差异,并与欧洲群体的单倍型序列进行了比较。结果在640 bp的COⅠ基因序列中检测到5个变异位点,定义了7种单倍型,发现Hap1为8个梭鲈群体的共享单倍型,且与欧洲群体的HapA相同,在中国群体所占比例(93.36%)高于中亚群体(72.58%)和欧洲群体(53.85%);Hap2和Hap3是中国群体的特异单倍型,而Hap4~Hap7为中亚群体的特异单倍型。单倍型序列的聚类图和网络图均显示Hap1/A为梭鲈群体的原始单倍型,中国和中亚群体的特异单倍型相对于原始单倍型仅有1~2个位点的变异,属于Hap1/A的亚型,与欧洲群体的特异单倍型具有较大的差异。每个群体检测到1~4种单倍型,斋桑湖(ZS)群体单倍型最多,而中国的腾格里湖(NX)、兴凯湖(XK)和鸭绿江(YJ)群体仅有1个单倍型(Hap1);塔什干(TS)群体的单倍型多样性(Hd)和核苷酸多样性(π)最高(Hd=0.514±0.069;π=0.00079±0.00011),其次是ZS群体,而中国梭鲈群体的多样性参数较低。AMOVA分析结果显示,梭鲈群体间遗传变异占20.74%,群体间遗传分化程度较高(0.15≤F_(st)=0.20736<0.25),TS群体与ZS群体和中国群体间的遗传分化极大(F_(st)>0.25),中国群体中仅黑河(HH)群体与其他群体的遗传分化较大,而中国其他5个群体间无遗传分化。基于群体间遗传距离的系统进化树显示,来自中国的6个梭鲈群体与哈萨克斯坦的ZS群体聚为一支,而乌兹别克斯坦的TS群体独立为一支。研究结果为梭鲈群体的繁殖及放流管理提供了参考。 展开更多
关键词 梭鲈 线粒体cOⅠ基因 野生群体 遗传结构
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新生儿脐血中Cyt-C和ELR及sTNFR-Ⅱ对早发型败血症发病风险的预测价值 被引量:1
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作者 杜晨 徐征 +1 位作者 夏兰兰 李宁 《中国妇幼健康研究》 2023年第8期14-18,共5页
目的 探讨新生儿脐血中细胞色素C(Cyt-C)、嗜酸性粒细胞/淋巴细胞比值(ELR)及可溶性肿瘤坏死因子受体Ⅱ(sTNFR-Ⅱ)对早发型败血症(EOS)发病风险的预测价值。方法 选取2019年1月至2021年8月在保定市儿童医院诊断为新生儿EOS患儿85例为研... 目的 探讨新生儿脐血中细胞色素C(Cyt-C)、嗜酸性粒细胞/淋巴细胞比值(ELR)及可溶性肿瘤坏死因子受体Ⅱ(sTNFR-Ⅱ)对早发型败血症(EOS)发病风险的预测价值。方法 选取2019年1月至2021年8月在保定市儿童医院诊断为新生儿EOS患儿85例为研究组,另选取同期健康新生儿85例为对照组;两组均于胎儿娩出后留取脐血样本,比较两组脐血中Cyt-C、ELR及sTNFR-Ⅱ水平,分析三者对EOS发病风险的预测价值。结果 研究组与对照组的羊水性状(χ^(2)=6.010)、母亲发热(χ^(2)=6.168)的分布,以及孕周(t=8.920)、新生儿出生体重(t=10.746)比较差异均有统计学意义(P<0.05)。研究组脐血中的Cyt-C、ELR及sTNFR-Ⅱ水平均高于对照组,经比较差异均有统计学意义(t值分别为9.578、9.487、13.472,P<0.05)。ROC曲线分析显示,新生儿脐血中Cyt-C、ELR及sTNFR-Ⅱ预测EOS发病风险的曲线下面积(AUC)分别为0.709(95%CI:0.635~0.776)、0.756(95%CI:0.684~0.818)、0.744(95%CI:0.671~0.808);三者联合预测EOS发病风险的AUC为0.932(95%CI:0.884~0.965);脐血中Cyt-C、ELR及sTNFR-Ⅱ联合预测EOS发病风险的AUC均大于各指标的单独预测结果,经比较差异均有统计学意义(Z值分别为5.065、4.266、4.329,P<0.05)。结论 新生儿EOS患儿脐血中Cyt-C、ELR及sTNFR-Ⅱ水平均明显升高,联合检测具有良好地预测EOS发病风险的价值,对临床有一定的指导意义。 展开更多
关键词 新生儿 早发型败血症 细胞色素c 嗜酸性粒细胞/淋巴细胞比值 可溶性肿瘤坏死因子受体Ⅱ 预测价值
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α-细辛醚上调细胞色素C及Caspase-3表达影响食管癌Eca-109细胞的生物学行为
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作者 黄静 储韬 《南通大学学报(医学版)》 2024年第4期342-345,共4页
目的:分析α-细辛醚上调细胞色素C(cytochrome C,cytC)及Caspase-3表达对食管癌Eca-109细胞生物学行为的影响。方法:将食管癌Eca-109细胞随机等量分为4组,即低、中及高剂量(分别给予25、50及100 mg/L的α-细辛醚),另随机取等量细胞加入... 目的:分析α-细辛醚上调细胞色素C(cytochrome C,cytC)及Caspase-3表达对食管癌Eca-109细胞生物学行为的影响。方法:将食管癌Eca-109细胞随机等量分为4组,即低、中及高剂量(分别给予25、50及100 mg/L的α-细辛醚),另随机取等量细胞加入等体积培养液作为空白组,培养48 h后通过平板克隆实验检测4组细胞增殖情况,Annexin V/PI法检测细胞凋亡情况,RT-qPCR及Western Blot法检测细胞中cytC及Caspase-3 mRNA及蛋白表达。结果:(1)细胞克隆数在空白组最高,低剂量组显著高于高剂量组;凋亡率在空白组最低,低剂量组显著低于高剂量组。(2)4组细胞迁移至小室下的细胞数空白组>低剂量组>中剂量组>高剂量组。(3)CytC及Caspase-3蛋白在高剂量组表达显著高于空白组及低剂量组,且中剂量组表达高于空白组。(4)CytC及Caspase-3 mRNA的表达:高剂量组>中剂量组>低剂量组>空白组,差异均有统计学意义(均P<0.05)。结论:α-细辛醚抑制Eca-109细胞增殖及侵袭,并且可能通过上调cytC及Caspase-3表达促进调亡。 展开更多
关键词 Α-细辛醚 细胞色素c cASPASE-3 食管癌EcA-109细胞 增殖 凋亡
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Cancer and age related colonic crypt deficiencies in cytochrome c oxidase Ⅰ 被引量:5
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作者 Carol Bernstein Alexander Facista +9 位作者 Huy Nguyen Beryl Zaitlin Nadia Hassounah Cristy Loustaunau Claire Margaret Payne Bhaskar Banerjee Steve Goldschmid V Liana Tsikitis Robert Krouse Harris Bernstein 《World Journal of Gastrointestinal Oncology》 SCIE CAS 2010年第12期429-442,共14页
AIM: To investigate whether defi ciency of expressionof cytochrome c oxidase I (CcOI) in colonic crypts is associated with colon cancer.METHODS: The pattern and level of expression of CcOI in non-neoplastic colonic cr... AIM: To investigate whether defi ciency of expressionof cytochrome c oxidase I (CcOI) in colonic crypts is associated with colon cancer.METHODS: The pattern and level of expression of CcOI in non-neoplastic colonic crypts,and in dysplastic tissues,was assessed using standard immunohis-tochemical methods.Biopsies were obtained from individuals undergoing colonoscopies for screening purposes or for a medically indicated reason.Tissue samples were also obtained from surgical colonic resections.Samples from resections were taken from colonic mucosa 1 and 10 cm from tumors and from the tumors themselves.Samples were evaluated for frequency of crypts with reduced or absent expression of CcOI.In most crypts the loss was apparent throughout the entire crypt,while in a small minority the loss was segmental.The strong immunoreactivity using this monoclonal antibody makes the scoring unambiguous.The percent of crypts with reduced or absent expression of CcOI or (infrequent) segmented loss of expression was then calculated.Data analyses were performed using SPSS statistical package 17.0.RESULTS: The average frequency of CcOI deficient crypts (CcOI-DC) is low in individuals between 20 and 39 years of age,with 0.48% ± 0.40% CcOI-DC for women and 1.80% ± 0.35% for men.CcOI-DC increases after age 40 years,so that between the ages of 40 and 44 years the average frequency of CcOI- DC goes up to 5.89% ± 0.84% in women and 2.15% ± 1.27% in men.By 80-84 years of age,the average frequency of CcOI-DC goes up in women to 15.77% ± 0.97% and in men to 22.6% ± 0.65%.The increases in CcOI-DC from ages 40-44 years compared to 80-84 years in women and men are significantly different with P < 0.01.For women over age 60 years,deficiency of CcOI expression is greater in those women who have had a cancer in their colon.The frequency of CcOI-DC,measured in men,increased in tissues adjacent to colon cancer,being 4.03% ± 0.27% in individuals free of neoplasia in the age range 55-64 yearsand 14.13% ± 0.35% in resected histologically normal tissue of men with cancer in the same age range,P < 0.001.Similar signifi cant differences were noted in older age ranges.The frequency of CcOI-DC crypts in the cecum and sigmoid colon of an individual are signifi cantly correlated,with an R2 = 0.414 for women and R2 = 0.528 for men,P < 0.001.This suggests that the factors determining the level of CcOI deficiency act throughout the colon.Most defective crypts are in clusters of two or more,a likely consequence of crypt fission.In the non-neoplastic margins of cancers,crypts are frequently defi cient for CcOI,and such crypts may appear in large clusters,some containing more than 100 defi cient crypts.CcOI defi ciency is also apparent in colon cancers and sometimes involves a large section of the tumor.Overall,CcOI deficient cells can be visualized in segments of crypts,in whole crypts that increase in frequency with age,in crypts undergoing f ission,in clusters of crypts where the clusters increase in size with age,in increased frequency near tumors,in large clusters in the intimate margins of tumors,and in the tumors themselves.There is no clear dividing line between early stages that can be considered aspects of aging and later stages that can be considered aspects of the progression to cancer.This ambiguity may re ect a rather general situation leading to adult cancer where the early stages of cellular change appear to be relatively innocuous features of the aging process but over decades may evolve into malignancy.CONCLUSION: CcOI defi cient crypts increase in frequency with age,and clusters of defi cient crypts are associated with,and may give rise to,colon cancer. 展开更多
关键词 cytochrome c OXIDASE Aging colon cRYPTS colorectal cANcER Focal lesions
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Artesunate Effect on Schistosome Thioredoxin Glutathione Reductase and Cytochrome c Peroxidase as New Molecular Targets in Schistosoma mansoni-infected Mice 被引量:2
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作者 Amany A.Abdin Dalia S.Ashour Zeinab S.Shoheib 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2013年第12期953-961,共9页
Objective To investigate the possible effect of artesunate (ART) on schistosome thioredoxin glutathione reductase (TGR) and cytochrome c peroxidase (CcP) in Schistosoma mansoni-infected mice. Methods A total of ... Objective To investigate the possible effect of artesunate (ART) on schistosome thioredoxin glutathione reductase (TGR) and cytochrome c peroxidase (CcP) in Schistosoma mansoni-infected mice. Methods A total of 200 laboratory bred male Swiss albino mice were divided into 4 groups (50 mice in each group). Group I: infected untreated group (Control group) received a vehicle of 1% sodium carbonyl methylcellulose (CMC-Na); Group II: infected then treated with artesunate; Group III infected then treated with praziquantel, and group IV: infected then treated with artesunate then praziquantel. Adult S. mansoni worms were collected by Animal Perfusion Method, tissue egg counted, TGR, and CcP mRNA Expression were estimated of in $. mansoni adult worms by semi-quantitative rt-PCR. Results Semi-quantitative rt-PCR values revealed that treatment with artesunate caused significant decrease in expression of schistosome TGR and CcP in comparison to the untreated group. In contrast, the treatment with praziquantel did not cause significant change in expression of these genes. The results showed more reduction in total worm and female worm count in combined ART-PZQ treated group than in monotherapy treated groups by either ART or PZO, Moreover, complete disappearance (100%) of tissue eggs was recorded in ART-PZQ treated group with a respective reduction rate of 95.9% and 68.4% in ART- and PZQ-treated groups. Conclusion The current study elucidated for the first time that anti-schistosomal mechanisms of artesunate is mediated via reduction in expression of schistosome TGR and CcP. Linking these findings, addition of artesunate to praziquantel could achieve complete cure outcome in treatment of schistosomiasis. 展开更多
关键词 ScHISTOSOMIASIS ARTESUNATE PRAZIQUANTEL Thioredoxin glutathione reductase cytochrome c peroxidase
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Effects of High Concentration Glucose on the Expression of NF-κB,Bax and Cytochrome C and Apoptosis of Islet Cells in Mice 被引量:2
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作者 梁瑜祯 张木勋 +2 位作者 夏宁 杨月莲 冯乐平 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2009年第4期439-444,共6页
The roles of NF-kappaB (NF-κB) expression, Bax activity and cytochrome C (Cyt C) release, apoptosis of islet cells induced by high concentration glucose were explored in vitro. Pancreatic islet cells, which were ... The roles of NF-kappaB (NF-κB) expression, Bax activity and cytochrome C (Cyt C) release, apoptosis of islet cells induced by high concentration glucose were explored in vitro. Pancreatic islet cells, which were isolated from Kunming mice, were cultured with different concentrations of glucose in DMEM, and divided into the following groups: G1, G2, G3, G4, G5, and G6 groups, corresponding to the glucose concentrations of 5.6, 7.8, 11.1, 16.7, 22.5, and 27.6 mmol/L, respectively. After culture for 120 h, insulin secretion was evaluated by radioimmunoassay, and the NF-rd3 expression was detected by immunocytochemistry. Bax activity and Cyt C release were measured by immunofluorescence, and apoptosis was examined by Hoechst33342 assay. The results showed that in GI, G2 and G3 groups, insulin secretion was enhanced with the increase of glucose concentration, and the NF-κB expression was also increased (P〈0.05), but Bax activity, Cyt C release and apoptosis rate showed no significant difference among them. However, in G4, G5, and G6 groups, apoptosis rate of islet cells, NF-rd3 expression, Bax activity, and Cyt C release were all significantly increased, and insulin secretion was impaired as compared with G1, G2, and G3 groups (P〈0.05). It was concluded that the exposure of islet cells to high glucose could induce islet cells apoptosis as well as impaired insulin secretion. The NF-κB signaling pathway and mitochondria pathway in islet cells might play some roles in the progressive loss of islet cells in diabetes. The inhibition of the NF-κB expression could be an effective strategy for protecting pancreatic islet cells. 展开更多
关键词 islet cells APOPTOSIS high concentration glucose nuclear factor-κB cytochrome c BAX
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Interaction of methylenetetrahydrofolate reductase C677T,cytochrome P4502E1 polymorphism and environment factors in esophageal cancer in Kazakh population 被引量:13
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作者 Jiang-Mei Qin Lei Yang Bo Chen Xiu-Mei Wang Feng Li Pei-Hua Liao Lin He 《World Journal of Gastroenterology》 SCIE CAS CSCD 2008年第45期6986-6992,共7页
AIM: To evaluate the association and interaction of genetic polymorphisms in methylenetetrahydrofolate reductase (MTHER) and cytochrome P4502E1 (CY- P4502E1), environment risk factors with esophageal cancer (EC... AIM: To evaluate the association and interaction of genetic polymorphisms in methylenetetrahydrofolate reductase (MTHER) and cytochrome P4502E1 (CY- P4502E1), environment risk factors with esophageal cancer (EC) in Kazakh, a high EC incidence area of Xinjiang Uygur Autonomous Region, China. METHODS: A 1:2 matched case-control study was conducted with 120 cases of EC and 240 populationor hospital-based controls. The controls were matched for sex, nationality, area of residence and age within a 5-year difference. MTHER and CYP4502E1 genotypes were identified by PCR-based restriction fragment length polymorphism (RFLP). A conditional logistic regression model was established to identify risk factors. The strata method was adopted in interaction analysis. RESULTS: Low consumption of green vegetables and fresh fruits, alcohol drinking, and unsafe water (shallow well, or river) were found to be the risk factors for EC. Individuals with the MTHFR677 (C/T + T/T) genotype had a 2.62-fold (95% CI: 1.61-4.28) risk of developing EC compared with those who carried the C/C genotype. Individuals with the CYP4502EIC1/C1 genotype had a 3.00-fold (95% CI: 1.82-4.96) risk compared with those who carried the CYP4502E1 (C1/C2 + C2/C2) genotype. Gene-environment interaction analysis showed that MTHFR677 gene polymorphism was correlated with consumption of green vegetables and fresh fruit, while CYP4502E1 C1/C1 was correlated with alcohol drinking and unsafe drinking water. MTHFR and CYP4502E1 analysis of gene-gene interaction showed that individuals with the MTHFR677 (C/T + T/T) and CYP4502EIC1/ C1 genotypes had a 7.41-fold (95% CI: 3.60-15.25) risk of developing EC compared with those who carried the MTHFR677C/C and CYP4502E1 RsaI C1/C2 + C2/C2 genes, and the interaction rate was higher than that of the two factors alone. CONCLUSION: Low consumption of green vegetables and fresh fruits, alcohol drinking, and unsafe water (shallow well, or river) and polymorphisms in MTHFR and CYP4502E1 genes are important risk factors for EC. There is a synergistic interaction among polymorphisms in MTHFR and CYP4502E1 genes and environment factors. MTHFR and CYP4502E1 genes can be used as biomarkers for prevention of EC in Kazakh, Xinjiang Uygur Autonomous Region, China. 展开更多
关键词 KAZAKH Esophageal cancer Methylenetet-rahydrofolate reductase c677T cytochrome P4502E1 Genetic polymorphism Environment risk factors INTERAcTION case control study
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成纤维细胞生长因子2通过抑制TET2/UQCRH表达拮抗血管平滑肌细胞凋亡和促进其增殖
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作者 徐睿妍 李雯 +6 位作者 柳新嫄 姚童 屈顺林 危当恒 王佐 姜志胜 李国华 《中国动脉硬化杂志》 CAS 2024年第10期843-849,共7页
[目的]探讨10-11转位蛋白2(TET2)/泛醌细胞色素C还原酶铰链蛋白(UQCRH)轴在成纤维细胞生长因子2(FGF-2)抑制血管平滑肌细胞(VSMC)凋亡中的作用。[方法]正常培养的VSMC分为对照组、FGF-2组、FGF-2+成纤维细胞生长因子受体(FGFR)泛抑制剂L... [目的]探讨10-11转位蛋白2(TET2)/泛醌细胞色素C还原酶铰链蛋白(UQCRH)轴在成纤维细胞生长因子2(FGF-2)抑制血管平滑肌细胞(VSMC)凋亡中的作用。[方法]正常培养的VSMC分为对照组、FGF-2组、FGF-2+成纤维细胞生长因子受体(FGFR)泛抑制剂LY2874455组。TET2基因过表达(OETET2)或UQCRH基因过表达(OEUQCRH)的VSMC分为对照组、FGF-2组、OETET2+FGF-2组或OEUQCRH+FGF-2组。采用Hoechst33342和PI染色检测细胞凋亡,CCK-8实验检测细胞增殖,Western blot检测凋亡相关蛋白pro-Caspase-3、cleaved Caspase-3、Bax、Bcl-2及TET2、UQCRH表达水平。运用NCBI、methprimer网站预测分析UQCRH基因启动子CpG岛位点。[结果]FGF-2可抑制VSMC凋亡、促进其增殖,下调促凋亡相关蛋白cleaved Caspase-3、Bax和TET2、UQCRH表达,上调抗凋亡蛋白Bcl-2表达(与对照组相比,P<0.05),但不影响pro-Caspase-3表达(与对照组相比,P>0.05),LY2874455可对抗FGF-2的作用(与FGF-2组相比,P<0.05)。TET2或UQCRH过表达可逆转FGF-2对VSMC抗凋亡、促增殖的作用,促进促凋亡相关蛋白表达上调,抗凋亡蛋白表达下调(与FGF-2组相比,P<0.05)。UQCRH基因启动子区域存在3个CpG岛。过表达TET2能上调FGF-2处理的VSMC中UQCRH表达(与FGF-2组相比,P<0.05)。[结论]FGF-2通过抑制TET2和UQCRH表达,减少VSMC凋亡,促进其增殖。 展开更多
关键词 成纤维细胞生长因子2 10-11转位蛋白2 泛醌细胞色素c还原酶铰链蛋白 细胞凋亡 细胞增殖
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Mechanisms of Cytochrome C Extraction by Reverse Micelles 被引量:1
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作者 YU Yan chun QIAN Bao hua +2 位作者 CHU Ying WU Zi sheng GAO Chang qing 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2001年第1期73-76,共4页
The extraction of cytochrome C was carried out by means of phase transfer technique with three different reverse micellar systems, i.e. , a CTAB micellar solution in n butyl alcohol chloroform(volume ratio 4... The extraction of cytochrome C was carried out by means of phase transfer technique with three different reverse micellar systems, i.e. , a CTAB micellar solution in n butyl alcohol chloroform(volume ratio 4∶1), an AOT micellar solution in isooctane and a SDSS D 2EHPA micellar solution in isooctane. The extraction mechanisms were studied. The results show that the extraction mechanisms for the same proteins with different types of reverse micellar systems can be distinct. The extraction of cytochrome C with CTAB and SDSS D 2EHPA reverse micellar systems are carried out according to the mechanism of electrostatic interaction. However, in the extraction of cytochrome C with the AOT reverse micellar system, the electrostatic interaction between the protein and the surfactant is not important. 展开更多
关键词 MEcHANISM cytochrome c EXTRAcTION Reverse micelles
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Structure of Cytochromec and Its Platinum-modified Derivatives by Fourier Transform Infrared Spectroscopy 被引量:1
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作者 JIANG Li-juan SUN Wei-yin +2 位作者 FANG Jiang-lin SHU Mou-hai TANG Wen-xia 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1997年第2期3-11,共9页
The secondary structures of native cytochrome c(cyt c) in both solid and solution states and four platinum modified cyt c derivatives in solution were determined by means of Fourier transform infrared spectroscopy. I... The secondary structures of native cytochrome c(cyt c) in both solid and solution states and four platinum modified cyt c derivatives in solution were determined by means of Fourier transform infrared spectroscopy. It was found that the secondary structure of cyt c in solid state is similar to that in the solution. In the cases of platinum modified cyt c derivatives, when the binding sites of platinum complex are on or near the surface of the protein, its secondary structure is similar to that of native cyt c. However, when the platinum complex binds to Met 80 ligand and causes the replacement of the second axial ligand by non native Lys 79 ligand or H 2O supplied by solvent, there is a significant difference between the structures of low or high spin state cyt c derivatives and that of native cyt c. The results suggest that axial ligand Met 80 residue plays an important role in stabilizing the secondary structure of cyt c. 展开更多
关键词 cytochrome c PLATINUM Secondary structure FT IR
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Interaction Between Cytochrome c and the Hapten 2,4-Dinitro- fluorobenzene by Electrospray Ionization Mass Spectrometry 被引量:2
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作者 Bo Wu Yan-qiu Chu +1 位作者 Zhao-yun Dai Chuan-fan Ding 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 北大核心 2008年第3期217-220,共4页
Allergic contact dermatitis is a delayed hypersensitivity reaction, which results from skin exposure to low molecular weight chemicals such as haptens. To clarify the pathogenic mechanism, electrospray ionization mass... Allergic contact dermatitis is a delayed hypersensitivity reaction, which results from skin exposure to low molecular weight chemicals such as haptens. To clarify the pathogenic mechanism, electrospray ionization mass spectrometry (ESI-MS) and hydrogen/deuterium (H/D) exchange, as well as UV spectroscopy, were applied to determine the interaction between the model protein cytochrome c (cyt c) and the hapten 2,4- dinitro-fiuorobenzene (DNFB). The ESI-MS results demonstrate that the conformation of cyt c can change from native folded state into partially unfolded state with the increase of DNFB. The equilibrium state H/D exchange followed by ESI-MS further confirms the above results. UV spectroscopy indicates that the strong- field coordination between iron of heme (prosthetic group) and His18 or Met80 of cyt c is not obviously affected by the hapten. 展开更多
关键词 INTERAcTION cytochrome c 2 4-dinitro-fluorobenzene ESI-MS
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Label-free surface-enhanced infrared spectro-electro-chemical analysis of the Redox potential shift of cytochrome c complexed with a cardiolipin-containing lipid membrane of varied composition 被引量:1
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作者 刘丽 武烈 +1 位作者 曾丽 姜秀娥 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第12期91-97,共7页
In this study, a lipid membrane was fabricated by fusing cardiolipin-phosphatidylcholine(CL_PC, 1:4) vesicles onto a hydrophobic surface of 1-dodecanethiol(DT) preadsorbed on a nanostructured gold film. By changi... In this study, a lipid membrane was fabricated by fusing cardiolipin-phosphatidylcholine(CL_PC, 1:4) vesicles onto a hydrophobic surface of 1-dodecanethiol(DT) preadsorbed on a nanostructured gold film. By changing the concentration of the DT adsorption solution, we constructed a series of CL PC-DT bilayers with different hydrophobicity to study the effects of lipid membrane characteristics on the adsorption conformation of cytochrome c(Cyt c). Electrochemical analysis showed that the formal potential is 0.24 V for Cyt c-CL_PC-DT(10), 0.2 V for Cyt c-CL_PC-DT(20), and 0.16 V for Cyt c-CL_PC-DT(40) — a gradual positive shift with the decreasing DT concentration — relative to the potential of native cyt c(0.02 V). Potential-induced surface-enhanced infrared adsorption difference spectroscopy revealed that the gradual positive shift of the formal potential of CL-bound cyt c is determined by the environment with the gradually lowered dielectric constant for the heme cofactor in CL-bound cyt c(Fe^3+). 展开更多
关键词 cytochrome c cARDIOLIPIN surface-enhanced infrared adsorption spectroscopy protein-solvent interaction
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OSW-1 Induced Apoptosis in Hepatocellular Carcinoma through Generation of ROS, Cytochrome C and Noxa Activation Independent of p53 with Non-Activation of Caspase-3 被引量:2
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作者 Xiaochen Liu Jingchao Liang +3 位作者 Jichun Jin Haiyang Li Bosheng Mei Xinglin Jin 《Chinese Medicine》 2017年第1期1-9,共9页
Aim: To study the antitumor mechanism of OSW-1 in hepatocellular carcinoma. Materials and Methods: The expression profiling microarray was carried out to extract RNA from SK-Hep-1 which suffered from OSW-1. ρ0-SK-Hep... Aim: To study the antitumor mechanism of OSW-1 in hepatocellular carcinoma. Materials and Methods: The expression profiling microarray was carried out to extract RNA from SK-Hep-1 which suffered from OSW-1. ρ0-SK-Hep-1 was maintained SK-Hep-1 in MEM containing 100 μg/L ethidium bromide (EB), 1 mM sodium pyruvate and 50 μg/ml uridine for 40 days. Then confirmed COX-I and COX-II of mitochondrial DNA were knocked out. Cells suffered from OSW-1 or doxorubicin. Then cells were washed twice with cold PBS and incubated with DCFH-DA. Fluorescent signal was recorded by using Infinite 200 Pro multimode Plate readers. Results: OSW-1 elevates generation of ROS and Cytochrome C which are associated with the induction of apoptosis in SK-Hep-1 cells. We also demonstrate that OSW-1 does not depend on p53 to up-regulate the BH3-only protein Noxa. What is more noteworthy that the Caspase-9 and FADD are down-regulated in above process. Conclusion: OSW-1 induced special apoptosis is different from the mitochondrial death pathway and the death receptor pathway and final result is not Caspase family’s activating. This provides a novel theory that nonmalignant cells are significantly less sensitive to OSW-1 than cancer cell lines. 展开更多
关键词 OSW-1 Hepatocellular cARcINOMAS ROS cytochrome c Mitochondrial Death Pathway
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Oridonin induces apoptosis in gastric cancer through Apaf-1,cytochrome c and caspase-3 signaling pathway 被引量:25
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作者 Ke-Wang Sun Ying-Yu Ma +7 位作者 Tian-Pei Guan Ying-Jie Xia Chang-Ming Shao Le-Gao Chen Ya-Jun Ren Hai-Bo Yao Qiong Yang Xu-Jun He 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第48期7166-7174,共9页
AIM:To investigate the effect and mechanism of oridonin on the gastric cancer cell line HGC-27 in vitro.METHODS:The inhibitory effect of oridonin on HGC-27 cells was detected using the 3-(4,5-dimethylthiazol2-yl)-2,5-... AIM:To investigate the effect and mechanism of oridonin on the gastric cancer cell line HGC-27 in vitro.METHODS:The inhibitory effect of oridonin on HGC-27 cells was detected using the 3-(4,5-dimethylthiazol2-yl)-2,5-diphenyl tetrazolium bromide assay.After treatment with 10 μg/mL oridonin for 24 h and 48 h,the cells were stained with acridine orange/ethidium bromide.The morphologic changes were observed under an inverted fluorescence microscope.DNA fragmen-tation(a hallmark of apoptosis) and lactate dehydrogenase activity were examined using DNA ladder assay and lactate dehydrogenase-release assay.After treated with oridonin(0,1.25,2.5,5 and 10 μg/mL),HGC-27 cells were collected for anexin V-phycoerythrin and 7-amino-actinomycin D double staining and tested by flow cytometric analysis,and oridonin-induced apoptosis in HGC-27 cells was detected.After treatment with oridonin for 24 h,the effects of oridonin on expression of Apaf-1,Bcl-2,Bax,caspase-3 and cytochrome c were also analyzed using reverse-transcript polymerase chain reaction(RT-PCR) and Western blotting.RESULTS:Oridonin significantly inhibited the proliferation of HGC-27 cells in a dose-and time-dependent manner.The inhibition rates of HGC-27 treated with four different concentrations of oridonin for 24 h(1.25,2.5,5 and 10 μg/mL) were 1.78% ± 0.36%,4.96% ± 1.59%,10.35% ± 2.76% and 41.6% ± 4.29%,respectively,which showed a significant difference(P < 0.05).The inhibition rates of HGC-27 treated with oridonin at the four concentrations for 48 h were 14.77% ± 4.21%,21.57% ± 3.75%,30.31% ± 4.91% and 61.19% ± 5.81%,with a significant difference(P < 0.05).The inhibition rates of HGC-27 treated with oridonin for 72 h at the four concentrations were 25.77% ± 4.85%,31.86% ± 3.86%,48.30% ± 4.16% and 81.80% ± 6.72%,with a significant difference(P < 0.05).Cells treated with oridonin showed typical apoptotic features with acridine orange/ethidium bromide staining.After treatment with oridonin,the cells became round,shrank,and developed small buds around the nuclear membrane while forming apoptotic bodies.Lactate dehydrogenase(LDH) release assay showed that after treated with 1.25 μg/mL and 20 μg/mL oridonin for 24 h,LDH release of HGC-27 caused by apoptosis increased from 22.94% ± 3.8% to 52.68% ± 2.4%(P < 0.001).However,the change in the release of LDH caused by necrosis was insignificant,suggesting thatthe major cause of oridonin-induced HGC-27 cell death was apoptosis.Flow cytometric analysis also revealed that oridonin induced significant apoptosis compared with the controls(P < 0.05).And the apoptosis rates of HGC-27 induced by the four different concentrations of oridonin were 5.3% ± 1.02%,12.8% ± 2.53%,28.5% ± 4.23% and 49.6% ± 3.76%,which were in a dose-dependent manner(P < 0.05).After treatment for 24 h,DNA ladder showed that oridonin induced a significant increase in DNA fragmentation in a dosedependent manner.RT-PCR revealed that mRNA expression levels were up-regulated compared with the controls in caspase-3(0.917 ± 0.103 vs 0.357 ± 0.019,P < 0.05),cytochrome c(1.429 ± 0.111 vs 1.002 ± 0.014,P < 0.05),Apaf-1(0.688 ± 0.101 vs 0.242 ± 0.037,P < 0.05) and Bax(0.856 ± 0.101 vs 0.278 ± 0.027,P < 0.05)(P < 0.05),whereas down-regulated in Bcl-2(0.085 ± 0.012 vs 0.175 ± 0.030,P < 0.05).Western blotting analysis also confirmed this result.CONCLUSION:Apoptosis of HGC-27 induced by oridonin may be associated with differential expression of Apaf-1,caspase-3 and cytochrome c,which are highly dependent upon the mitochondrial pathway. 展开更多
关键词 Oridonin Gastric cancer Proliferation Apoptosis Apaf-1/caspase-3/cytochrome c
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Effects on the Early Development of the Pearl Sac by Cytochrome c,Yolk Lecithin and Polyvinyplyrro 被引量:1
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作者 Zheng Junying Zhang Muxian +1 位作者 Liu Ting Wei Qingshan 《Wuhan University Journal of Natural Sciences》 CAS 1997年第2期111-114,共4页
Mantle pieces of Hyriopisis cumingii was treated by three kinds of solution,These mantle pieces were inserted together with paraffin nucleuses into the connective tissue of three groups of Hyriopisis cumingii.These op... Mantle pieces of Hyriopisis cumingii was treated by three kinds of solution,These mantle pieces were inserted together with paraffin nucleuses into the connective tissue of three groups of Hyriopisis cumingii.These operated animals were cultured in a pool for a month.Several pearl sacs were put out and immersed by Bouin's solution after every five days.Sections of each animals were made by histological method.Those without treatment were in a control group.Observations of these sections showed that cytochrome c and yolk lecithin have an accelerated roles on pearl sac development and pearl layer secretion.No effects on pearl sac development by polyvinyplyrrolidone(PVP). 展开更多
关键词 cytochrome c yolk lecithin PVP mantle pieces pearl sac
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核壳结构上转换发光纳米粒子的合成及用于细胞色素C的检测
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作者 董佳瑶 易静 +2 位作者 刘浏 于贺 唐宏武 《分析科学学报》 CAS CSCD 北大核心 2024年第2期125-131,共7页
本工作合成了三层核壳结构的上转换发光纳米粒子,其中第一层是惰性核,第二层为发光层,为了增强上转换发光强度,又在表面包覆了第三层惰性壳层。该材料粒径均一、分散性良好,其发光层厚度约为2.4nm,惰性壳层厚度约为2.9nm。在其表面修饰... 本工作合成了三层核壳结构的上转换发光纳米粒子,其中第一层是惰性核,第二层为发光层,为了增强上转换发光强度,又在表面包覆了第三层惰性壳层。该材料粒径均一、分散性良好,其发光层厚度约为2.4nm,惰性壳层厚度约为2.9nm。在其表面修饰了细胞色素C的适配体链及互补链,在适配体的3’端修饰了BHQ3基团,能够猝灭上转换纳米粒子在655nm波长处的发光。当细胞色素C存在时,适配体与细胞色素C结合从而离开其表面,使655nm处的发光恢复。在检测过程中,540nm处的发光强度不会发生变化,可以用作细胞色素C的比率荧光检测。结果表明,当细胞色素C浓度在5~80μmol/L范围时,发光信号恢复程度与细胞色素C浓度呈线性相关,相关系数为0.998,检出限为1μmol/L。所建立方法可为细胞色素C的荧光检测提供一种新的技术思路。 展开更多
关键词 上转换发光纳米粒子 细胞色素c 发光共振能量转移
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Cytochrome-c aptamer functionalized Pt nanoclusters for enhanced chemodynamic therapy 被引量:1
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作者 Bo Feng Dan Zhao +1 位作者 Yaowei Peng Fu Wang 《Journal of Innovative Optical Health Sciences》 SCIE EI CAS 2021年第4期64-71,共8页
Catalysis-based chemodynamic therapy(CDT)is an emerging cancer treatment strategy which uses a Fenton-like reaction to kill tumor cells by catalyzing endogenous hydrogen peroxide(H_(2)O_(2))into a toxic hydroxyl radic... Catalysis-based chemodynamic therapy(CDT)is an emerging cancer treatment strategy which uses a Fenton-like reaction to kill tumor cells by catalyzing endogenous hydrogen peroxide(H_(2)O_(2))into a toxic hydroxyl radical(·OH).The performance of CDT is greatly dependent on PDT agent.Herein,mitochondria-targeting Pt nanoclusters were synthesized using cytochrome c aptamer(CytcApt)as template.The obtained CytcApt-PtNCs can produce.OH by H_(2)O_(2)under the acidic conditions.Moreover,CytcApt-PtNCs could kill 4T1 tumor cells in a pH-dependent manner,but had no side effect on normal 293T cells.Therefore,CytcApt-PtNCs possess excellent therapeutic effect and good biosafety,indicating their great potential for CDT. 展开更多
关键词 chemodynamic therapy Pt nanoclusters cytochrome c aptamer
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Effect of matrine on HepG2 cells: role of glutathione and cytochrome c 被引量:1
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作者 Xiangdong Cheng Yian Du +2 位作者 Ling Huang Zhiming Jing Zhiguo Zheng 《The Chinese-German Journal of Clinical Oncology》 CAS 2008年第4期213-216,共4页
Objective: To investigate the death mode of human hepatoma cells exposed to matrine and the role of glutathione (GSH) and cytochrome c. Methods: The MTT test and Cell Death Detection ELISA were used to identify cell d... Objective: To investigate the death mode of human hepatoma cells exposed to matrine and the role of glutathione (GSH) and cytochrome c. Methods: The MTT test and Cell Death Detection ELISA were used to identify cell death mode and viability of cells exposed to matrine. The volume of intracellular GSH was detected by GSH reductase. Finally Western blotting was chosen to analyze the expression of cytochrome c and Caspase-9 in HepG2 cells treated by matrine. Results: The apop-totic cell death induced by matrine in Hep G2 cells dramatically increased in the time-, dose-dependent manner. Matrine can exhaust intracellular GSH effectively to change the redox state in cells. Furthermore it affect the cytotoxicity of matrine. Re-sults of Western blotting showed that matrine induced the release of cytochrome c from mitochondria to cytoplasm, and then stimulate the cleavage of Caspase-9 in a time-dependent manner. Conclusion: Matrine induced apoptosis in Hep G2 cells through the mitochondrial pathway, and oxidative stress via depletion of GSH is directly involved in the apoptotic process. 展开更多
关键词 MATRINE GLUTATHIONE cytochrome c cASPASE-9 APOPTOSIS
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