Relaxin/insulin-like family peptide receptor 2 （RXFP2） is a robust candidate gene related to horn types in sheep. A series of independent genome-wide association studies have reported that RXFP2 underlies the existe...Relaxin/insulin-like family peptide receptor 2 （RXFP2） is a robust candidate gene related to horn types in sheep. A series of independent genome-wide association studies have reported that RXFP2 underlies the existence and lack of horns. In this study, High-Resolution Melting （HRM） analysis and DNA sequencing were employed to detect the polymorphism of RXFP2 gene in three sheep breeds from Qinghai-Tibet Plateau of China （ Tibetan sheep, Qinghai fine wool sheep and Alpine Merino sheep） and to determine the impacts of genotypes of RXFP2 on expression of horn phenotypes. The results showed that one single nucleotide pol- ymorphism （SNP） was identified as RXFP 2SNP c. 29389966 A 〉 G. The frequency of genotype AA in Alpine Merino ram （polled） was significantly higher than that in Tibetan ram （horned） and Qinghai fine wool ram （horned） Ix2（1, N= 421） = 72.25, P〈 0.001; xZ（1, N= 402） = 4.28, P〈 0.005）]; the fre- quency of genotype AA in Qinghai fine wool ewe （polled） was also much higher than that in Qinghai fine wool ewe （horned） and Tibetan ewe （horned） [x2（1, N = 196） = 42.04, P 〈 0. 001 ; x2 （ 1, N = 192） = 24. 69, P 〈 0. 005 ） ]. This mutation could potentially be exploited in marker-assisted selection （MAS） pro- grams within sheep industry to breed horned or polled animals.展开更多
目的探讨松弛素受体1(RXFP1)在石英尘致矽肺中的潜在作用。方法无特定病原体级雄性Wistar大鼠64只随机分为对照组和染尘组。采用非暴露式气管内一次性灌注法,染尘组予气管内灌入质量浓度为500 g/L德国标准石英混悬液0.1 m L,对照组予气...目的探讨松弛素受体1(RXFP1)在石英尘致矽肺中的潜在作用。方法无特定病原体级雄性Wistar大鼠64只随机分为对照组和染尘组。采用非暴露式气管内一次性灌注法,染尘组予气管内灌入质量浓度为500 g/L德国标准石英混悬液0.1 m L,对照组予气管内灌入0.9%氯化钠溶液0.1 m L。2组大鼠分别在染毒第1、7、14和28天各处死8只,以苏木精-伊红染色观察大鼠肺组织的病理学变化,分别用实时荧光定量聚合酶链反应法和免疫组织化学法分析大鼠肺组织中Rxfp1 mRNA和RXFP1蛋白的表达。结果染尘第28天,染尘组大鼠双肺肉眼可见灰白色结节,光镜下可观察到肺泡间隔断裂,局部可见明显的矽结节。染尘组大鼠肺组织Rxfp1 mRNA相对表达水平于染尘第1天升高至对照组的145%(P<0.01),于第7和14天下降至与对照组接近水平(P>0.05),于第28天下降至对照组的45%(P<0.01)。染尘组大鼠肺组织中RXFP1蛋白相对表达水平从染毒第7天开始高于对照组(P<0.01),第28天达到最高水平(P<0.01)。结论 RXFP1可能在抑制矽肺发病过程中发挥重要作用。展开更多
目的阐明压力负荷诱导的大鼠心脏松弛素受体(relaxin/insulin like family peptide receptor,RXFP1)表达下调的意义及机制。方法利用大鼠主动脉弓结扎(transvers aorta constriction,TAC)方法建立压力负荷模型,Western Blot检测RXFP1表...目的阐明压力负荷诱导的大鼠心脏松弛素受体(relaxin/insulin like family peptide receptor,RXFP1)表达下调的意义及机制。方法利用大鼠主动脉弓结扎(transvers aorta constriction,TAC)方法建立压力负荷模型,Western Blot检测RXFP1表达水平,并检测siRNA敲减RXFP1的乳大鼠成纤维细胞在松弛素作用下胶原的分泌水平。进一步采用Western Blot检测不同浓度TGFβ1孵育乳大鼠心脏成纤维细胞RXFP1的表达变化。结果 TAC组心脏松弛素受体RXFP1表达下调,敲减RXFP1后松弛素抑制乳大鼠心脏成纤维细胞胶原分泌的作用显著减弱,TGFβ1呈剂量依赖性地下调乳大鼠心脏成纤维细胞RXFP1表达。结论在压力负荷诱导的心室重塑模型中,TGFβ1介导了心脏RXFP1下调,并抑制松弛素发挥抗纤维化作用。展开更多
基金Supported by the Central Level Scientific Research Institutes for Basic R&D Special Fund Business(1610322015014)Earmarked Fund for Modern China Wool&Cashmere Technology Research System(nycytx-40-3)Engineering Research Center of Sheep and Goat Breeding of CAAS
文摘Relaxin/insulin-like family peptide receptor 2 （RXFP2） is a robust candidate gene related to horn types in sheep. A series of independent genome-wide association studies have reported that RXFP2 underlies the existence and lack of horns. In this study, High-Resolution Melting （HRM） analysis and DNA sequencing were employed to detect the polymorphism of RXFP2 gene in three sheep breeds from Qinghai-Tibet Plateau of China （ Tibetan sheep, Qinghai fine wool sheep and Alpine Merino sheep） and to determine the impacts of genotypes of RXFP2 on expression of horn phenotypes. The results showed that one single nucleotide pol- ymorphism （SNP） was identified as RXFP 2SNP c. 29389966 A 〉 G. The frequency of genotype AA in Alpine Merino ram （polled） was significantly higher than that in Tibetan ram （horned） and Qinghai fine wool ram （horned） Ix2（1, N= 421） = 72.25, P〈 0.001; xZ（1, N= 402） = 4.28, P〈 0.005）]; the fre- quency of genotype AA in Qinghai fine wool ewe （polled） was also much higher than that in Qinghai fine wool ewe （horned） and Tibetan ewe （horned） [x2（1, N = 196） = 42.04, P 〈 0. 001 ; x2 （ 1, N = 192） = 24. 69, P 〈 0. 005 ） ]. This mutation could potentially be exploited in marker-assisted selection （MAS） pro- grams within sheep industry to breed horned or polled animals.
文摘目的探讨松弛素受体1(RXFP1)在石英尘致矽肺中的潜在作用。方法无特定病原体级雄性Wistar大鼠64只随机分为对照组和染尘组。采用非暴露式气管内一次性灌注法,染尘组予气管内灌入质量浓度为500 g/L德国标准石英混悬液0.1 m L,对照组予气管内灌入0.9%氯化钠溶液0.1 m L。2组大鼠分别在染毒第1、7、14和28天各处死8只,以苏木精-伊红染色观察大鼠肺组织的病理学变化,分别用实时荧光定量聚合酶链反应法和免疫组织化学法分析大鼠肺组织中Rxfp1 mRNA和RXFP1蛋白的表达。结果染尘第28天,染尘组大鼠双肺肉眼可见灰白色结节,光镜下可观察到肺泡间隔断裂,局部可见明显的矽结节。染尘组大鼠肺组织Rxfp1 mRNA相对表达水平于染尘第1天升高至对照组的145%(P<0.01),于第7和14天下降至与对照组接近水平(P>0.05),于第28天下降至对照组的45%(P<0.01)。染尘组大鼠肺组织中RXFP1蛋白相对表达水平从染毒第7天开始高于对照组(P<0.01),第28天达到最高水平(P<0.01)。结论 RXFP1可能在抑制矽肺发病过程中发挥重要作用。
文摘目的阐明压力负荷诱导的大鼠心脏松弛素受体(relaxin/insulin like family peptide receptor,RXFP1)表达下调的意义及机制。方法利用大鼠主动脉弓结扎(transvers aorta constriction,TAC)方法建立压力负荷模型,Western Blot检测RXFP1表达水平,并检测siRNA敲减RXFP1的乳大鼠成纤维细胞在松弛素作用下胶原的分泌水平。进一步采用Western Blot检测不同浓度TGFβ1孵育乳大鼠心脏成纤维细胞RXFP1的表达变化。结果 TAC组心脏松弛素受体RXFP1表达下调,敲减RXFP1后松弛素抑制乳大鼠心脏成纤维细胞胶原分泌的作用显著减弱,TGFβ1呈剂量依赖性地下调乳大鼠心脏成纤维细胞RXFP1表达。结论在压力负荷诱导的心室重塑模型中,TGFβ1介导了心脏RXFP1下调,并抑制松弛素发挥抗纤维化作用。
