[ Objective] To clone follicle-stimulating hormone receptor (FSHR) promoter in the Jintang black goat, study its transcriptional activity, and provide a basis for alternative splicing of FSHR gene. [Method] The tota...[ Objective] To clone follicle-stimulating hormone receptor (FSHR) promoter in the Jintang black goat, study its transcriptional activity, and provide a basis for alternative splicing of FSHR gene. [Method] The total DNA were extracted from the womb of Jintang black goat, and one pair of primers were designed for amplification of FSHR promoter fragments, then the sequences and homology were analyzed. The FSHR promoter fragment was inserted into the pcFSHRB1 expression vector to substitute the CMV promoter and construct the pcFSHRB2 expression vector. The pcFSHRB1 and pcFSHRB2 expression vectors were transformed into HEK293 cells, respectively. Then these cells were collected after 24 and 48 h treatment with 2 mlU/ml follicle-stimulating hormone (FSH), and the cAMP levels were detected. [Result] The FSHR promoter sequence of Jin- tang black goat had 34.2% homology to that of chicken and 41.6% to that of rat, respectively. The transcription initial site of FSHR was at -576 bp and its upstream sequences contained two TATA-boxes, four CAAT-boxes, one E-box and one Wl-box. After treating for 24 and 48 h, the cAMP levels of pcFSHRB2 were respectively 299.581 3 and 125.528 1 pmol/L; and that of pcFSHRB1 were respectively 120.057 1 and 109.940 7 pmoVL. [Conclusion] The FSHR promoter of Jintang black goat is a typical type 2 eukaryotic promoter, and it is also a strong promoter.展开更多
为筛选检测金堂黑山羊不同组织转录水平的荧光定量PCR方法中的最佳内参基因,本实验首先利用荧光定量PCR(qPCR)检测16个候选基因在金堂黑山羊心、肝、脾、瘤胃、背最长肌和臀肌中的转录水平,并利用geNorm、NormFinder、BestKeeper程序分...为筛选检测金堂黑山羊不同组织转录水平的荧光定量PCR方法中的最佳内参基因,本实验首先利用荧光定量PCR(qPCR)检测16个候选基因在金堂黑山羊心、肝、脾、瘤胃、背最长肌和臀肌中的转录水平,并利用geNorm、NormFinder、BestKeeper程序分析候选基因转录水平的稳定性。再以最佳内参基因组合、最佳内参基因和2个转录水平稳定性相对最差的候选基因作为内参基因,经qPCR检测黑山羊心、脾和臀肌中相容性复合体Ⅱ类基因(MHC class II DQ-beta 1 chain gene,DQB1)的转录水平,验证筛选基因的稳定性。结果显示,不同候选基因在不同组织中的转录水平稳定性存在一定的差异性。经geNorm、NormFinder、BestKeeper程序分析得出最稳定内参基因为PPIB和YWHAZ,相对最不稳定内参基因为18S rRNA、TOP2β和EIF3K。以最佳内参基因组合(PPIB和YWHAZ)、最佳内参基因(PPIB)和两个最不稳定基因(TOP2β和EIF3K)作为内参基因检测DQB1在黑山羊心、脾和臀肌中转录水平,前两者分别与后两者所得到的DQB1转录水平差异显著(p<0.05),验证了本实验所筛选内参基因的稳定性。本实验首次筛选出了金堂黑山羊最佳内参基因组合为PPIB和YWHAZ,为金堂黑山羊不同组织qPCR分析中的内参基因选择提供参考。展开更多
为探究金堂黑山羊主要组织相容性复合体II类基因(MHC class II DQ-beta 1 chain gene,DQB1)的结构与功能,及其组织表达特征。本研究采用PCR扩增DQB1基因并对其进行生物信息学分析,同时采用荧光定量PCR技术检测其在金堂黑山羊不同组织中...为探究金堂黑山羊主要组织相容性复合体II类基因(MHC class II DQ-beta 1 chain gene,DQB1)的结构与功能,及其组织表达特征。本研究采用PCR扩增DQB1基因并对其进行生物信息学分析,同时采用荧光定量PCR技术检测其在金堂黑山羊不同组织中的转录情况。结果显示:金堂黑山羊DQB1基因长度为786 bp,编码261个氨基酸。同源性分析显示金堂黑山羊DQB1基因与8个物种的相应基因同源性均达到85%以上,表明DQB1基因具有较高的保守性。荧光定量PCR结果显示,该基因在金堂黑山羊心脏组织中转录水平显著高于其在脾、肌肉、肠的转录水平(p<0.01),表明DQB1基因在不同组织中的转录水平存在一定差异。本研究为进一步探究DQB1的免疫功能提供参考依据。展开更多
基金supported by Poultry and Aqua Breeding Project of Sichuan Province
文摘[ Objective] To clone follicle-stimulating hormone receptor (FSHR) promoter in the Jintang black goat, study its transcriptional activity, and provide a basis for alternative splicing of FSHR gene. [Method] The total DNA were extracted from the womb of Jintang black goat, and one pair of primers were designed for amplification of FSHR promoter fragments, then the sequences and homology were analyzed. The FSHR promoter fragment was inserted into the pcFSHRB1 expression vector to substitute the CMV promoter and construct the pcFSHRB2 expression vector. The pcFSHRB1 and pcFSHRB2 expression vectors were transformed into HEK293 cells, respectively. Then these cells were collected after 24 and 48 h treatment with 2 mlU/ml follicle-stimulating hormone (FSH), and the cAMP levels were detected. [Result] The FSHR promoter sequence of Jin- tang black goat had 34.2% homology to that of chicken and 41.6% to that of rat, respectively. The transcription initial site of FSHR was at -576 bp and its upstream sequences contained two TATA-boxes, four CAAT-boxes, one E-box and one Wl-box. After treating for 24 and 48 h, the cAMP levels of pcFSHRB2 were respectively 299.581 3 and 125.528 1 pmol/L; and that of pcFSHRB1 were respectively 120.057 1 and 109.940 7 pmoVL. [Conclusion] The FSHR promoter of Jintang black goat is a typical type 2 eukaryotic promoter, and it is also a strong promoter.
文摘为筛选检测金堂黑山羊不同组织转录水平的荧光定量PCR方法中的最佳内参基因,本实验首先利用荧光定量PCR(qPCR)检测16个候选基因在金堂黑山羊心、肝、脾、瘤胃、背最长肌和臀肌中的转录水平,并利用geNorm、NormFinder、BestKeeper程序分析候选基因转录水平的稳定性。再以最佳内参基因组合、最佳内参基因和2个转录水平稳定性相对最差的候选基因作为内参基因,经qPCR检测黑山羊心、脾和臀肌中相容性复合体Ⅱ类基因(MHC class II DQ-beta 1 chain gene,DQB1)的转录水平,验证筛选基因的稳定性。结果显示,不同候选基因在不同组织中的转录水平稳定性存在一定的差异性。经geNorm、NormFinder、BestKeeper程序分析得出最稳定内参基因为PPIB和YWHAZ,相对最不稳定内参基因为18S rRNA、TOP2β和EIF3K。以最佳内参基因组合(PPIB和YWHAZ)、最佳内参基因(PPIB)和两个最不稳定基因(TOP2β和EIF3K)作为内参基因检测DQB1在黑山羊心、脾和臀肌中转录水平,前两者分别与后两者所得到的DQB1转录水平差异显著(p<0.05),验证了本实验所筛选内参基因的稳定性。本实验首次筛选出了金堂黑山羊最佳内参基因组合为PPIB和YWHAZ,为金堂黑山羊不同组织qPCR分析中的内参基因选择提供参考。
文摘为探究金堂黑山羊主要组织相容性复合体II类基因(MHC class II DQ-beta 1 chain gene,DQB1)的结构与功能,及其组织表达特征。本研究采用PCR扩增DQB1基因并对其进行生物信息学分析,同时采用荧光定量PCR技术检测其在金堂黑山羊不同组织中的转录情况。结果显示:金堂黑山羊DQB1基因长度为786 bp,编码261个氨基酸。同源性分析显示金堂黑山羊DQB1基因与8个物种的相应基因同源性均达到85%以上,表明DQB1基因具有较高的保守性。荧光定量PCR结果显示,该基因在金堂黑山羊心脏组织中转录水平显著高于其在脾、肌肉、肠的转录水平(p<0.01),表明DQB1基因在不同组织中的转录水平存在一定差异。本研究为进一步探究DQB1的免疫功能提供参考依据。