Background Uterine aging is a key factor contributing to the deterioration of egg quality and reproductive performance in laying hens.Despite its importance,the molecular mechanisms underlying uterine aging remain poo...Background Uterine aging is a key factor contributing to the deterioration of egg quality and reproductive performance in laying hens.Despite its importance,the molecular mechanisms underlying uterine aging remain poorly defined.This study aimed to characterize gene expression and regulatory changes associated with uterine aging in hens at different life stages.Results Transcriptomic Analysis of uterine tissue from hens aged 350,500,And 700 d revealed dynamic changes in gene expression patterns during aging.A significant upregulation of genes involved in cellular senescence was observed,including increased expression of the p53 signaling pathway And markers associated with inflammation And cell cycle arrest.The most notable changes occurred between 350 And 500 d of age,suggesting this as a critical window for the onset of uterine aging.MicroRNA sequencing identified miR-210a-5p as significantly reduced with age.Target prediction and experimental validation showed that miR-210a-5p directly suppresses the expression of RASL11B,a Ras-like small GTPase that activates the MAPK signaling pathway.In primary uterine epithelial cells,reduced miR-210a-5p levels led to elevated RASL11B expression,increased activation of B-Raf,MEK,and ERK proteins,and enhanced expression of aging-related genes and inflammatory factors.In contrast,overexpression of miR-210a-5p or inhibition of the MAPK pathway delayed senescence and reduced inflammatory signaling.RASL11B overexpression was sufficient to induce aging phenotypes,confirming its central role in promoting uterine cellular aging.Conclusions This study identifies a novel regulatory pathway in which miR-210a-5p modulates uterine aging through the RASL11B-MAPK signaling cascade.The findings provide mechanistic insight into age-related reproductive decline in hens and suggest that targeting this pathway may offer new strategies for maintaining uterine function and extending reproductive lifespan in poultry.展开更多
目的:探讨醛固酮瘤中CYP11B2,CYP11B1基因多态性与CYP11B2基因mRNA表达及术前血浆醛固酮浓度、收缩压、舒张压等临床表型的关系。方法:20例正常肾上腺和69例醛固酮瘤组织标本,分别取自2006年5月～2007年11月在华中科技大学同济医学院附...目的:探讨醛固酮瘤中CYP11B2,CYP11B1基因多态性与CYP11B2基因mRNA表达及术前血浆醛固酮浓度、收缩压、舒张压等临床表型的关系。方法:20例正常肾上腺和69例醛固酮瘤组织标本,分别取自2006年5月～2007年11月在华中科技大学同济医学院附属同济医院泌尿外科行肾癌根治术和肾上腺手术切除的患者。采用Taqman探针法检测DNA多态性,包括CYP11B2基因的rs1799998、rs4539及CYP11B1基因的rs6410和rs6387;采用两对独立的PCR检测CYP11B2基因intron2多态性(野生型/转位型)。采用syb greenReal time RT-PCR检测CYP11B2基因mRNA表达。在Rstatistics program 2.7.0程序包中使用SNPassoc 1.5-3和Haplo.stats 1.3.8分析CYP11B2和CYP11B1基因多态性及单体型与CYP11B2基因表达量和血浆醛固酮浓度、收缩压、舒张压等临床表型的关系。结果:单体型分型中,Global Score统计显示:CYP11B2-CYP11B1单体型与CYP11B2mRNA表达量增加相关(global-stat=16.175,df=8,P=0.04),与血清醛固酮水平相关(global-stat=20.407,df=8,P=0.009)。但与收缩压和舒张压不相关(分别P=0.34,P=0.54);多元回归分析中发现单体型H1(AGAConvT)和H3(AGAWtC)与CYP11B2基因mRNA的表达上调相关(经过Bonferroni校正后分别P=0.002;P=0.003),而H6(AGGWtT)、H10(AAAWtT)和H16(GAAWtT)与过多的醛固酮分泌相关(经过Bonferroni校正后分别P<0.0005;P=0.002;P=0.0015);但未见有单体型与收缩压和舒张压相关(均P>0.05)。结论:CYP11B2和CYP11B1基因多态性可能通过上调CYP11B2的表达,导致醛固酮瘤患者血清醛固酮水平的升高。展开更多
以耐盐碱野生大豆(Glycine soja L.G07256)为材料,采用同源克隆方法和RT-PCR技术获得一个TIFY类基因的全长cDNA(命名为GsTIFY11b)。进化树分析表明,与其他物种相比,GsTIFY11b与拟南芥的AtTIFY11a基因相似性最高,达到56%;序列分析表明GsT...以耐盐碱野生大豆(Glycine soja L.G07256)为材料,采用同源克隆方法和RT-PCR技术获得一个TIFY类基因的全长cDNA(命名为GsTIFY11b)。进化树分析表明,与其他物种相比,GsTIFY11b与拟南芥的AtTIFY11a基因相似性最高,达到56%;序列分析表明GsTIFY11b蛋白除具有TIFY保守结构域外,还具有一个N端保守结构域和一个C端保守的Jas结构域;实时荧光定量PCR结果显示该基因受盐和碱胁迫诱导表达;将GsTIFY11b转化拟南芥来验证其耐盐碱功能,获得两个转基因纯合体株系,盐碱胁迫分析结果表明,GsTIFY11b的超量表达没能提高拟南芥对盐碱胁迫的耐性,并且与野生型相比,转基因植株在种子萌发期和苗期表现出对盐胁迫更加敏感。盐胁迫信号通路相关marker基因在转基因拟南芥中的表达特性分析表明,GsTIFY11b可以调控RD29B、KIN1、DREB等基因的转录。在洋葱表皮细胞中瞬时表达GsTIFY11b-GFP融合蛋白的结果表明,GsTIFY11b定位于细胞核中。上述结果表明,该基因在细胞核中起着转录调节子的作用,可能是通过调控盐胁迫信号通路中关键基因的表达来改变植物对盐胁迫的耐受性。展开更多
基金funded by the National Key Research and Development Program of China,grant number 2021YFD1300600Sichuan Science and Technology Program(2024YFNH0025,2022YFYZ0005,2021YFYZ0031)China Agriculture Research System of MOF and MARA(CARS-40).
文摘Background Uterine aging is a key factor contributing to the deterioration of egg quality and reproductive performance in laying hens.Despite its importance,the molecular mechanisms underlying uterine aging remain poorly defined.This study aimed to characterize gene expression and regulatory changes associated with uterine aging in hens at different life stages.Results Transcriptomic Analysis of uterine tissue from hens aged 350,500,And 700 d revealed dynamic changes in gene expression patterns during aging.A significant upregulation of genes involved in cellular senescence was observed,including increased expression of the p53 signaling pathway And markers associated with inflammation And cell cycle arrest.The most notable changes occurred between 350 And 500 d of age,suggesting this as a critical window for the onset of uterine aging.MicroRNA sequencing identified miR-210a-5p as significantly reduced with age.Target prediction and experimental validation showed that miR-210a-5p directly suppresses the expression of RASL11B,a Ras-like small GTPase that activates the MAPK signaling pathway.In primary uterine epithelial cells,reduced miR-210a-5p levels led to elevated RASL11B expression,increased activation of B-Raf,MEK,and ERK proteins,and enhanced expression of aging-related genes and inflammatory factors.In contrast,overexpression of miR-210a-5p or inhibition of the MAPK pathway delayed senescence and reduced inflammatory signaling.RASL11B overexpression was sufficient to induce aging phenotypes,confirming its central role in promoting uterine cellular aging.Conclusions This study identifies a novel regulatory pathway in which miR-210a-5p modulates uterine aging through the RASL11B-MAPK signaling cascade.The findings provide mechanistic insight into age-related reproductive decline in hens and suggest that targeting this pathway may offer new strategies for maintaining uterine function and extending reproductive lifespan in poultry.
文摘目的:探讨醛固酮瘤中CYP11B2,CYP11B1基因多态性与CYP11B2基因mRNA表达及术前血浆醛固酮浓度、收缩压、舒张压等临床表型的关系。方法:20例正常肾上腺和69例醛固酮瘤组织标本,分别取自2006年5月～2007年11月在华中科技大学同济医学院附属同济医院泌尿外科行肾癌根治术和肾上腺手术切除的患者。采用Taqman探针法检测DNA多态性,包括CYP11B2基因的rs1799998、rs4539及CYP11B1基因的rs6410和rs6387;采用两对独立的PCR检测CYP11B2基因intron2多态性(野生型/转位型)。采用syb greenReal time RT-PCR检测CYP11B2基因mRNA表达。在Rstatistics program 2.7.0程序包中使用SNPassoc 1.5-3和Haplo.stats 1.3.8分析CYP11B2和CYP11B1基因多态性及单体型与CYP11B2基因表达量和血浆醛固酮浓度、收缩压、舒张压等临床表型的关系。结果:单体型分型中,Global Score统计显示:CYP11B2-CYP11B1单体型与CYP11B2mRNA表达量增加相关(global-stat=16.175,df=8,P=0.04),与血清醛固酮水平相关(global-stat=20.407,df=8,P=0.009)。但与收缩压和舒张压不相关(分别P=0.34,P=0.54);多元回归分析中发现单体型H1(AGAConvT)和H3(AGAWtC)与CYP11B2基因mRNA的表达上调相关(经过Bonferroni校正后分别P=0.002;P=0.003),而H6(AGGWtT)、H10(AAAWtT)和H16(GAAWtT)与过多的醛固酮分泌相关(经过Bonferroni校正后分别P<0.0005;P=0.002;P=0.0015);但未见有单体型与收缩压和舒张压相关(均P>0.05)。结论:CYP11B2和CYP11B1基因多态性可能通过上调CYP11B2的表达,导致醛固酮瘤患者血清醛固酮水平的升高。
文摘以耐盐碱野生大豆(Glycine soja L.G07256)为材料,采用同源克隆方法和RT-PCR技术获得一个TIFY类基因的全长cDNA(命名为GsTIFY11b)。进化树分析表明,与其他物种相比,GsTIFY11b与拟南芥的AtTIFY11a基因相似性最高,达到56%;序列分析表明GsTIFY11b蛋白除具有TIFY保守结构域外,还具有一个N端保守结构域和一个C端保守的Jas结构域;实时荧光定量PCR结果显示该基因受盐和碱胁迫诱导表达;将GsTIFY11b转化拟南芥来验证其耐盐碱功能,获得两个转基因纯合体株系,盐碱胁迫分析结果表明,GsTIFY11b的超量表达没能提高拟南芥对盐碱胁迫的耐性,并且与野生型相比,转基因植株在种子萌发期和苗期表现出对盐胁迫更加敏感。盐胁迫信号通路相关marker基因在转基因拟南芥中的表达特性分析表明,GsTIFY11b可以调控RD29B、KIN1、DREB等基因的转录。在洋葱表皮细胞中瞬时表达GsTIFY11b-GFP融合蛋白的结果表明,GsTIFY11b定位于细胞核中。上述结果表明,该基因在细胞核中起着转录调节子的作用,可能是通过调控盐胁迫信号通路中关键基因的表达来改变植物对盐胁迫的耐受性。
