旨在探究缺氧诱导基因1C(HIG1 hypoxia inducible domain family member 1C,HIGD1C)对牦牛睾丸支持细胞凋亡的影响。本研究分别选择3头3~6岁龄健康状况良好的公牦牛和隐睾症公牦牛,以其睾丸组织作为研究材料。通过HE染色、牦牛睾丸支持...旨在探究缺氧诱导基因1C(HIG1 hypoxia inducible domain family member 1C,HIGD1C)对牦牛睾丸支持细胞凋亡的影响。本研究分别选择3头3~6岁龄健康状况良好的公牦牛和隐睾症公牦牛,以其睾丸组织作为研究材料。通过HE染色、牦牛睾丸支持细胞分离培养、间接免疫荧光、RT-qPCR、Western blot、HIGD1C过表达与干扰载体构建及体外细胞转染等技术,探究HIGD1C对牦牛睾丸支持细胞凋亡的调控机制。结果显示:正常睾丸基底膜及间质组织完整,曲细精管、管周肌细胞及支持细胞等排列紧密,隐睾中曲细精管断裂萎缩且HIGD1C在牦牛隐睾组织中转录及蛋白的表达水平极显著于高于正常睾丸组织(P<0.01);HIGD1C蛋白主要分布在睾丸间质细胞和支持细胞;成功分离培养出牦牛睾丸支持细胞且HIGD1C蛋白定位于原代睾丸支持细胞胞核;HIGD1C过表达支持细胞后,Bcl-2 mRNA表达水平显著上调(P<0.05),蛋白表达水平极显著上调(P<0.01),Bax和Caspase-3 mRNA和蛋白表达水平均极显著上调(P<0.01),流式细胞术结果显示过表达HIGD1C组支持细胞凋亡率极显著上升(P<0.01);反之,HIGD1C敲除后,Bax、Bcl-2和Caspase-3 mRNA和蛋白表达水平均极显著下调(P<0.01),流式细胞术结果显示HIGD1C敲除组支持细胞凋亡率极显著下调(P<0.01)。本研究结果表明:正常睾丸组织结构完整,隐睾间质疏松,且HIGD1C在牦牛隐睾组织中高表达。体外细胞试验表明上调HIGD1C,可以激活促凋亡蛋白,促进牦牛支持细胞凋亡;反之,下调HIGD1C表达水平会抑制支持细胞凋亡。提示HIGD1C参与调控牦牛睾丸支持细胞的凋亡,为揭示牦牛隐睾的发生机制提供了参考。展开更多
为了探究NUPR1基因在奶牛乳房炎中的表达及分布规律,通过构建脂磷壁酸(LTA)诱导奶牛乳腺上皮细胞(MAC-T)体外炎症模型,以奶牛核蛋白1(Nucleus Protein 1,NUPR1)基因为研究对象,利用免疫组织化学技术(IHC)测定NUPR1在患病奶牛乳腺组织中...为了探究NUPR1基因在奶牛乳房炎中的表达及分布规律,通过构建脂磷壁酸(LTA)诱导奶牛乳腺上皮细胞(MAC-T)体外炎症模型,以奶牛核蛋白1(Nucleus Protein 1,NUPR1)基因为研究对象,利用免疫组织化学技术(IHC)测定NUPR1在患病奶牛乳腺组织中的分布情况。通过实时荧光定量PCR(qRT-PCR)及蛋白免疫印迹(WB)检测炎症相关因子、NUPR1基因及其上下游基因在奶牛乳腺炎组织及乳腺上皮细胞炎症模型中的表达规律。qRT-PCR和WB结果显示,IL-1β、IL-6、IL-8和TNF-α在乳腺病理组织及细胞炎症模型中均极显著上调表达(P<0.01),NUPR1在奶牛乳房炎病理乳腺组织及乳腺上皮细胞炎症模型中均显著或极显著上调表达(P<0.05,P<0.01),同时,DNMT1下调表达,KLF4、SESN2和SOCS3基因上调极显著表达(P<0.01)。IHC结果显示,NUPR1主要表达于奶牛乳腺上皮细胞中,并且在奶牛患病乳腺组织中的表达量高于正常组。本研究结果为进一步探究NUPR1基因在乳房炎病理进程中的调控机理提供了试验和理论基础。展开更多
[Objective] The aim of this study is to evaluate the safety and bacteriostasis of Yandureqing(AEE)and its microemulsion(AEE-ME).[Method]The acute toxicity was tested in mice by intragastric administration,and median l...[Objective] The aim of this study is to evaluate the safety and bacteriostasis of Yandureqing(AEE)and its microemulsion(AEE-ME).[Method]The acute toxicity was tested in mice by intragastric administration,and median lethal dose(LD50)as well as its 95% confidence interval was calculated by modified Karber method;the bacteriostasis was investigated by cylinder plate method.[Result]LD50 of AEE in mice was 10.937 g/kg with the 95% confidence interval of 9.309-12.850 g/kg;and LD50 of AEE-ME in mice was 5.357 g/kg with the 95% confidence interval of 4.388-6.566 g/kg.The MICs of AEE to Escherichia coli O149 from swine,Staphylococcus aureus,Salmonella pullorum and Streptococcus agalactiae were 10.00,20.00,20.00 and 10.00 mg/ml,respectively;while the MICs of AEE-ME to the 4 kinds of bacteria mentioned above were 5.00,10.00,5.00 and 5.00 mg/ml in turn,and that to Pseudomonas aeruginosa is 20.00 mg/ml.[Conclusion]AEE is an actually nontoxic drug and AEE-ME belongs to the low toxic preparation.AEE and AEE-ME have obvious bacteriostasis,in which AEE-ME is superior to AEE.展开更多
文摘为了探究NUPR1基因在奶牛乳房炎中的表达及分布规律,通过构建脂磷壁酸(LTA)诱导奶牛乳腺上皮细胞(MAC-T)体外炎症模型,以奶牛核蛋白1(Nucleus Protein 1,NUPR1)基因为研究对象,利用免疫组织化学技术(IHC)测定NUPR1在患病奶牛乳腺组织中的分布情况。通过实时荧光定量PCR(qRT-PCR)及蛋白免疫印迹(WB)检测炎症相关因子、NUPR1基因及其上下游基因在奶牛乳腺炎组织及乳腺上皮细胞炎症模型中的表达规律。qRT-PCR和WB结果显示,IL-1β、IL-6、IL-8和TNF-α在乳腺病理组织及细胞炎症模型中均极显著上调表达(P<0.01),NUPR1在奶牛乳房炎病理乳腺组织及乳腺上皮细胞炎症模型中均显著或极显著上调表达(P<0.05,P<0.01),同时,DNMT1下调表达,KLF4、SESN2和SOCS3基因上调极显著表达(P<0.01)。IHC结果显示,NUPR1主要表达于奶牛乳腺上皮细胞中,并且在奶牛患病乳腺组织中的表达量高于正常组。本研究结果为进一步探究NUPR1基因在乳房炎病理进程中的调控机理提供了试验和理论基础。
文摘以经产荷斯坦奶牛外周血白细胞为材料,分离Poly(A)+ RNA,反转录合成单链及双链cDNA,经酶切成平均大小为400~600 bp的片段,将患乳房炎奶牛cDNA分成2组,分别与2种不同的接头连接,再与健康奶牛cDNA进行2次消减杂交和2次抑制性PCR扩增,将第2次PCR产物与pGEM-T载体连接,转化大肠杆菌TOP10感受态细胞进行文库扩增,构建了具有高消减效率的奶牛乳房炎抗性相关cDNA文库.文库扩增后得到610个白色阳性克隆,随机挑选克隆进行PCR鉴定,插入片段主要分布在250~750 bp 之间.文库的成功构建为进一步筛选、克隆与奶牛乳房炎抗性相关的基因奠定了基础,对研究奶牛乳房炎抗性的分子机制以及乳房炎的综合防制具有重要意义.
基金Supported by Specific Program Funded by Basic Scientific Research Operating Expenses of Central Public Scientific Research Institutes(BRF060403)Key Project of Scientific and Technical Supporting Pro-grams of Gansu Province(0804NKCA074)~~
文摘[Objective] The aim of this study is to evaluate the safety and bacteriostasis of Yandureqing(AEE)and its microemulsion(AEE-ME).[Method]The acute toxicity was tested in mice by intragastric administration,and median lethal dose(LD50)as well as its 95% confidence interval was calculated by modified Karber method;the bacteriostasis was investigated by cylinder plate method.[Result]LD50 of AEE in mice was 10.937 g/kg with the 95% confidence interval of 9.309-12.850 g/kg;and LD50 of AEE-ME in mice was 5.357 g/kg with the 95% confidence interval of 4.388-6.566 g/kg.The MICs of AEE to Escherichia coli O149 from swine,Staphylococcus aureus,Salmonella pullorum and Streptococcus agalactiae were 10.00,20.00,20.00 and 10.00 mg/ml,respectively;while the MICs of AEE-ME to the 4 kinds of bacteria mentioned above were 5.00,10.00,5.00 and 5.00 mg/ml in turn,and that to Pseudomonas aeruginosa is 20.00 mg/ml.[Conclusion]AEE is an actually nontoxic drug and AEE-ME belongs to the low toxic preparation.AEE and AEE-ME have obvious bacteriostasis,in which AEE-ME is superior to AEE.