共查询到18条相似文献，搜索用时 234 毫秒
1.
旨在探究不同发育阶段湖羊生殖器官中脂联素受体(adiponectin receptor,AdpR)及睾酮(testosterone,T)分泌相关基因mRNA的表达变化及相关性分析。选取3、9、24月龄(M)湖羊各5只,颈静脉采血并收集血清,屠宰后,采集下丘脑、垂体、睾丸、附睾头、体、尾组织;ELISA技术检测各月龄湖羊血清中脂联素(adiponectin,Adp)、T、促性腺激素释放激素(gonadotropin releasing hormone,GnRH)、促性腺激素抑制激素(gonadotropin inhibitory hormone,GnIH)浓度;qRT-PCT技术检测不同发育阶段湖羊下丘脑-垂体-性腺轴(hypothalamus-pituitary-gonad axis,HPG)中AdpR1和AdpR2及T分泌关键基因mRNA表达规律;免疫组化技术对AdpR1在湖羊睾丸和附睾中进行定位分析。结果表明:不同发育阶段湖羊血清中Adp、GnRH、GnIH浓度呈现不同的变化趋势,其中Adp含量在性成熟后(9和24月龄)显著高于性成熟前(3月龄)(P0.05)。AdpR1mRNA表达量在各个月龄睾丸和附睾尾中均显著高于AdpR2(P0.05),其中AdpR1mRNA表达量在二者中呈上升趋势,且差异显著(P0.05),而在附睾头、体差异不显著(P0.05)。AdpR1存在于睾丸间质细胞、生精细胞、曲精细管管壁肌样细胞、精子细胞以及附睾头、体、尾的上皮细胞。血清中Adp与T含量呈显著正相关(P0.05);Adp含量与GnIH负相关以及与GnRH正相关,但差异不显著(P0.05);AdpR1mRNA表达水平与StAR、3β-HSD mRNA表达水平呈显著正相关(P0.05)。综上表明,在湖羊生殖器官发育过程中,Adp通过与其受体AdpR1结合,促进T的产生,进而影响湖羊睾丸发育。 相似文献
2.
脂联素（Adp）是主要由脂肪组织分泌的细胞因子,有重要的生理作用。本试验旨在研究重组脂联素（rAdp）对皖南花猪脂肪细胞脂联素及其受体2,AMP激活蛋白激酶（AMPK）、过氧化物增殖剂活化受体α（PPARα）mR-NA表达的影响。选择10d皖南花猪皮下脂肪组织分离前体脂肪细胞,增殖培养至80%融合后换分化培养基培养,细胞分化后用0、2和10mg/L rAdp分别处理12和48h。油红O染色法鉴定脂肪细胞,MTT方法检测细胞活力;酶法测定培养液中甘油释放量,荧光定量RT-PCR方法检测脂肪细胞脂联素（Adp）、脂联素受体1（AdpR1）、脂联素受体2（AdpR2）、PPARα和AMPK mRNA表达。结果显示,rAdp处理后,脂肪细胞活力总体有降低趋势,10mg/L处理48h达到显著水平（P〈0.05）;rAdp处理对甘油释放的抑制作用未达到差异水平。rAdp处理12h后,脂肪细胞AdpR1和AdpR2mRNA表达显著升高（P〈0.01）,但无剂量依赖性;rAdp处理48h后,脂肪细胞AdpmRNA表达显著下降（P〈0.05）。rAdp处理12h后,脂肪细胞PPARαmRNA表达显著升高（P〈0.01）,且有剂量效应性;而AMP AMPK mRNA表达均无显著性变化。结果提示,重组脂联素处理猪原代脂肪细胞有降低细胞活力和抑制脂肪细胞甘油释放量的趋势,能显著上调AdpR1、AdpR2和PPARα基因的表达,从而刺激脂肪酸氧化和甘油三酯的水解作用。 相似文献
3.
为了研究孕鼠在孕期暴露双酚A（bisphenol A,BPA）对仔鼠生殖激素及相关基因的影响,试验将40只昆明孕鼠随机分为A、B、C、D共4组,每组10只。其中A组为对照组,饲喂普通鼠粮;B、C、D组孕鼠整个妊娠期（妊娠1 d至分娩）分别按每只鼠每天50、500、2 500 mg/kg体重给予BPA,待孕鼠自然分娩,观察记录仔鼠死亡情况。至仔鼠性成熟（56日龄）剖杀仔鼠,摘取睾丸或卵巢称重并计算脏器指数,HE染色观察卵巢或睾丸组织结构的变化,ELISA试剂盒分析仔鼠血清睾酮（T）、促卵泡素（FSH）及雌二醇（E2）水平,免疫组织化学方法检测仔鼠睾丸或卵巢Bax、Bcl-2蛋白的表达,实时荧光定量PCR检测仔鼠睾丸StAR、CYP11a或卵巢AMH、Kitlg mRNA表达。结果显示,孕鼠暴露BPA极显著增加了仔鼠死亡率（P<0.01）,显著降低了仔鼠睾丸重（P<0.05）。ELISA检测结果表明,孕鼠暴露BPA极显著降低了仔鼠T（♂）及FSH（♀）含量（P<0.01）,极显著升高了仔鼠（♀） E2水平（P<0.01）。HE染色结果显示,随BPA剂量增加,仔鼠睾丸组织损伤严重,间质细胞减少;卵巢组织结构随BPA剂量增大,空泡逐渐增多,黄体颗粒数量逐渐减少。免疫组化结果显示,孕鼠暴露BPA增加了仔鼠睾丸或卵巢组织中Bax阳性蛋白表达,减少了Bcl-2阳性蛋白表达,显著降低了雄性仔鼠StAR mRNA表达量（P<0.05）;B、D组雄性仔鼠CYP11a mRNA表达量极显著降低（P<0.01）,而C组CYP11a mRNA表达量极显著升高（P<0.01）;C、D组雌鼠Kitlg mRNA表达极显著降低（P<0.01）,AMH mRNA表达量显著升高（P<0.05）。本试验结果表明,孕鼠妊娠期暴露不同剂量BPA增加了仔鼠死亡率,扰乱了生殖激素平衡和睾丸/卵巢中相关凋亡蛋白及生殖基因表达。 相似文献
4.
《中国畜牧兽医》2019,(11)
本研究旨在探究促卵泡素(follicle stimulating hormone,FSH)处理对体外培养的牛有腔卵泡颗粒细胞和膜细胞类固醇激素合成相关基因表达的影响。采集牛卵巢表面直径9～11 mm的有腔卵泡,用含不同浓度FSH的DMEM/F12体外培养牛有腔卵泡24 h。提取卵泡颗粒细胞、膜细胞RNA并反转录成cDNA,利用实时荧光定量PCR检测卵泡颗粒细胞、膜细胞中类固醇激素合成酶基因(CYP11A1、3β-HSD、CYP17A1、CYP19A1、17β-HSD)和促性腺激素受体基因(FSHR、LHR)的表达水平。结果显示,FSH处理上调了颗粒细胞中CYP11A1、3β-HSD和CYP19A1基因表达,其中,25 ng/mL FSH处理极显著上调了CYP11A1基因表达(P0.01),10 ng/mL FSH处理显著上调了3β-HSD基因表达(P0.05),50 ng/mL FSH处理显著上调了CYP19A1基因表达(P0.05);50 ng/mL FSH处理显著或极显著上调了膜细胞中CYP11A1、3β-HSD和CYP17A1基因表达(P0.05;P0.01),但在10和25 ng/mL FSH处理组中CYP11A1、3β-HSD和CYP17A1基因表达显著或极显著下调(P0.05;P0.01)。对FSHR、LHR基因研究结果显示,不同浓度FSH处理对颗粒细胞中FSHR、LHR基因的表达均无显著影响(P0.05),只有25和50 ng/mL FSH处理显著或极显著上调了膜细胞中LHR基因表达水平(P0.05;P0.01),且不同处理组之间膜细胞中CYP11A1、3β-HSD和CYP17A1基因的表达变化与LHR基因表达变化趋势较一致。结果表明,FSH处理可提高牛有腔卵泡颗粒细胞中CYP11A1、3β-HSD和CYP17A1基因的表达,膜细胞中CYP11A1、3β-HSD和CYP17A1基因对LH的刺激更敏感,FSH可能通过影响LHR基因的表达来调节膜细胞中类固醇合成酶基因的表达。 相似文献
5.
摘要：为探讨皖南花猪骨骼肌组织中脂联素受体（AdpRl、AdpR2）和不同类型肌球蛋白重链（MyHC）mRNA的发育性变化及性别差异,选择0（出生当天）、30、45、90、180日龄的皖南花猪公母各5头,以B～Actin为内标,采用△△Ct相对定量实时荧光PCR方法对背最长肌和半腱肌中AdpRl、AdpR2、MyHCI、MyHC2a、MyHC2b和My-HC2xmRNA进行定量分析。结果显示,背最长肌和半腱肌AdpRl、AdpR2、MyHCl、MyHC2a、MyHC2b和My—HC2XmRNA的表达都有显著或极显著的发育变化规律（P〈0．05或P〈0．01）。总体上AdpRl、AdpR2、My—HC2a、MyHC2b和MyHC2XmRNA在背最长肌显著或极显著高于半腱肌（P〈0．05或P〈0．01）;MyHClmRNA在背最长肌极显著低于半腱肌（P〈0．01）。半腱肌MyHClmRNA在母猪显著大于公猪（P〈0．05）,而MyHC2amRNA在母猪显著小于公猪（P〈0．05）。背最长肌和半腱肌AdpR2mRNA的表达分别与MyHCl正相关（P〈0．05）,半腱肌AdpRlmRNA的表达与MyHC2x正相关（P〈0．05）。结果表明,皖南花猪骨骼肌组织中AdpR和MyHC的基因表达有特定的发育模式和组织特异性,且有一定性别差异。 相似文献
6.
《畜牧兽医学报》2017,(1)
旨在探究奶牛胎盘组织中脂联素(Adiponectin)、瘦素(Leptin)、内脂素(Visfatin)与犊牛初生重的相关性。选取规模化养殖场正常分娩奶牛56头,按犊牛初生重划分为A(≤40kg)、B(40~45kg)、C(≥45kg)3组,分娩后立即手术采集胎盘组织,用RT-PCR和ELISA检测胎盘组织脂联素、瘦素和内脂素mRNA和蛋白表达水平,分析其与犊牛初生重的相关性。结果表明,随着犊牛初生重增加,奶牛胎盘组织脂联素、内脂素mRNA和蛋白表达水平均逐渐上升,瘦素先降低再升高;C组瘦素mRNA表达水平显著高于B组(P0.05),A组和B组、C组间差异均不显著(P0.05),脂联素和内脂素在A、B、C 3组间差异不显著(P0.05);A、B组脂联素蛋白表达水平差异不显著(P0.05),C组脂联素显著高于A组和B组(P0.05),瘦素和内脂素在A、B、C 3组间表达水平差异不显著(P0.05);母牛胎盘脂联素、瘦素mRNA和蛋白表达水平均与犊牛初生重极显著正相关(P0.01),母牛胎盘内脂素mRNA和蛋白表达水平均与犊牛初生重相关性不显著(P0.05);母牛胎盘脂联素、瘦素、内脂素mRNA和蛋白表达水平两两之间均呈极显著正相关(P0.01)。综上表明,奶牛胎盘中均有脂联素、瘦素和内脂素表达,胎盘脂联素、瘦素、内脂素相互协调对犊牛宫内生长发育发挥作用,其中脂联素和瘦素对犊牛初生重影响较大而内脂素影响较小。本研究结果为进一步研究奶牛胎盘组织中脂联素、瘦素、内脂素对犊牛初生重的作用机理提供参考。 相似文献
7.
《畜牧兽医学报》2016,(6)
旨在探讨促性腺激素释放激素(Gonadotropin releasing hormone,GnRH)主动免疫对公猪体内粪臭素代谢的影响。36只公猪随机分为免疫组(10周龄时初免,18周龄加免)、手术去势组(1周龄外科阉割)及完整对照组(不作任何处理)。应用ELISA检测血清中睾酮、雌二醇及雄烯酮含量,采用高效液相色谱检测脂肪中粪臭素、雄烯酮和血液中雄烯酮含量,荧光定量PCR检测肝中粪臭素代谢相关基因mRNA表达量,ELISA检测肝中粪臭素代谢相关蛋白表达。结果显示,GnRH主动免疫后,血清睾酮浓度显著下降(P0.05),睾丸严重萎缩。免疫组和手术组公猪血清中睾酮、雌二醇、雄烯酮浓度和脂肪中粪臭素、雄烯酮含量相似(P0.05),均显著低于对照组(P0.05)。免疫组公猪肝中CAR、COUP-TF1、CYP2E1、CYB5A、CYP2C49、GSTO2mRNA表达变化与手术组相似(P0.05),均显著高于对照组(P0.05);CYP2A19mRNA表达量手术组显著高于免疫组(P0.05),免疫组显著高于对照组(P0.05);而PXR、SULT1A1mRNA表达量在3组间无明显差异(P0.05)。免疫组公猪肝中CYP2A19、CYP2C49和GSTO2蛋白表达变化与手术组相似(P0.05),均显著高于对照组(P0.05);CYP2E1和CYB5A蛋白表达量在手术组最高,对照组最低,免疫组介于两组之间,与两组均有显著性差异(P0.05);而SULT1A1蛋白表达量在3组间无明显差异(P0.05)。综上表明,GnRH主动免疫降低公猪血清中睾酮、雌二醇和雄烯酮含量,上调肝CYP450s和GSTO2基因和蛋白表达,加速粪臭素在肝中的代谢,从而降低公猪膻味。 相似文献
8.
《畜牧兽医学报》2017,(9)
本试验旨在研究RNA干扰抑制素α亚基(Inhibinα-subunit,INHα)基因和添加抑制素A(InhibinA)对绵羊颗粒细胞雌激素(Estrogen,E2)和孕酮(Progesterone,P)分泌及相关基因表达的影响,以探索抑制素在绵羊颗粒细胞E2和P分泌中的作用。从1.0~1.5岁小尾寒羊的卵泡(3~7mm)中分离培养颗粒细胞,分为2个处理组:干扰组(脂质体介导法转染颗粒细胞)和InhibinA添加组(200ng·mL~(-1))。利用ELISA试剂盒检测E2和P的分泌,荧光定量RT-PCR检测E2和P的分泌相关基因(CYP11、3β-HSD和CYP19)的表达量。结果表明,与对照组相比,干扰组siRNA转染颗粒细胞48h后,INHα基因的抑制率达87%,E2和P的分泌量显著降低(P0.05);InhibinA添加组E2和P的分泌水平显著升高(P0.05);干扰组3β-HSD和CYP19的mRNA表达量显著降低(P0.05),CYP11的表达量显著升高(P0.05);InhibinA添加组CYP19、CYP11和3β-HSD的mRNA表达水平均显著升高(P0.05)。综上表明,抑制素在绵羊颗粒细胞中起关键调控作用,通过调节绵羊颗粒细胞类固醇激素的分泌参与调控卵泡发育和排卵过程。 相似文献
9.
试验旨在研究精索上神经（superior spermatic nerve,SSN）对睾丸功能的影响,25只成年Wistar大鼠随机分为2组,试验组左右睾丸切除精索上神经,手术30 d后两组大鼠同时处死取样分析。结果显示,睾丸去精索上神经不影响睾丸指数的大小但使附睾尾精子数极显著降低（P＜0.01）,平均日增重显著增加（P＜0.05）。增殖细胞核抗原（PCNA）免疫组织化学染色结果显示,睾丸去精索上神经不影响曲细精管精原细胞和初级精母细胞的增殖,但影响曲细精管的形态和生殖细胞的规则排列。RT-PCR结果显示,睾丸去精索上神经明显上调β1AR mRNA的表达,下调β2AR mRNA的表达;另外切除精索上神经不影响睾丸3β-羟胆固醇脱氢酶（3β-HSD）mRNA表达,但显著抑制类固醇快速调节蛋白（StAR）、胆固醇侧链裂解酶（P450scc）mRNA表达（P＜0.05）。结果表明,支配睾丸的精索上神经通过调节肾上腺素能受体β1AR和β2AR的表达及StAR和P450scc影响睾丸睾酮的合成和精子的发生。 相似文献
10.
本试验旨在对沙子岭猪不同组织中脂联素(ADIPOQ)、脂联素受体(ADIPOR)及其相关基因的mRNA和蛋白表达量的发育性变化规律进行研究。选取12头沙子岭猪(1、28、140日龄各4头),测定不同组织器官中ADIPOQ、ADIPOR1、ADIPOR2的mRNA和蛋白及2型拓扑异构酶β型(TOP2Β)、TATA结合蛋白(TBP) mRNA的发育性变化。结果表明:猪不同组织中ADIPOQ、ADIPOR1、ADIPOR2、TOP2β和TBP的mRNA表达量基本随着猪的生长而逐渐升高,140日龄时大部分组织器官中这几种基因的mRNA表达量显著或极显著高于1日龄(P 0.05或P0.01)。大部分组织器官中ADIPOQ、ADIPOR1和ADIPOR2的蛋白表达量呈现出降低的趋势。由此可见,ADIPOQ及相关基因mRNA和蛋白的表达量与猪的脂肪沉积呈负相关,机体能根据自身需要对其进行调节。 相似文献
11.
对不同时期仔猪血浆睾酮含量和睾丸组织c-jun mRNA表达量进行了检测,以初步推测c-jun mRNA表达与睾酮分泌的关系,为进一步体外研究原癌基因c-jun对睾酮分泌的影响奠定基础。试验选择1、3、5周龄仔猪作为研究对象,利用睾酮ELISA检测试剂盒检测血浆中睾酮含量;采用SYBR GreenⅠ实时荧光定量PCR检测睾丸组织c-jun mRNA的表达。结果表明,仔猪血浆睾酮水平随周龄增加而显著升高,其中3周龄时睾酮含量最高;c-jun在各周龄睾丸组织中均有表达,其中3周龄仔猪睾丸组织c-jun mRNA表达量最高。因此,仔猪睾酮分泌与c-jun mRNA表达量可能存在相关性。 相似文献
12.
Yoshihisa OHTANI Tomo YONEZAWA Sang‐Houn SONG Tatsuyuki TAKAHASHI Astrid ARDIYANTI Katsuyoshi SATO Akihiko HAGINO Sang‐gun ROH Kazuo KATOH 《Animal Science Journal》2011,82(1):99-106
Although the functions of adiponectin, a differentiated adipocyte‐derived hormone, in regulating glucose and fatty acid metabolism are regulated by two subtypes of adiponectin receptors (AdipoRs; AdipoR1 and AdipoR2), those in ruminants remain unclear. Therefore we examined the messenger RNA (mRNA) expression levels of adiponectin and its receptors in various bovine tissues and mammary glands among different lactation stages, and the effects of lactogenic hormones (insulin, dexamethasone and prolactin) and growth hormone (GH) on mRNA expression of the AdipoRs in cultured bovine mammary epithelial cells (BMEC). AdipoRs mRNAs were widely expressed in various bovine tissues, but adiponectin mRNA expression was significantly higher in adipose tissue than in other tissues. In the mammary gland, although adiponectin mRNA expression was significantly decreased at lactation, AdipoR1 mRNA expression was significantly higher at peak lactation than at the dry‐off stage. In BMEC, lactogenic hormones and GH upregulated AdipoR2 mRNA expression but did not change that of AdipoR1. In conclusion, adiponectin and its receptor mRNA were expressed in various bovine tissues and the adiponectin mRNA level was decreased during lactation. These results suggest that adiponectin and its receptors ware changed in mammary glands by lactation and that AdipoRs mRNA expression was regulated by different pathways in BMEC. 相似文献
13.
Cloning, expression and chromosome localization of porcine adiponectin and adiponectin receptors genes 总被引：7，自引：0，他引：7
Dai MH Xia T Zhang GD Chen XD Gan L Feng SQ Qiu H Peng Y Yang ZQ 《Domestic animal endocrinology》2006,30(2):117-125
Adiponectin is a cytokine secreted specifically by adipocytes that has been proposed to enhance insulin sensitivity and prevent atherosclerosis. Adiponectin receptors (adipoR1 and adipoR2) are recently found in mice which act as receptors for globular and full-length adiponectin to mediate the fatty-acid oxidation and glucose uptake in muscle and liver. The primary goal of this study was to examine chromosome localization of porcine adiponectin and adiponectin receptors and the gene expression pattern in various tissues of pigs of the three genes. Radiation hybrid mapping demonstrated that porcine adiponectin, adipoR1 and adipoR2 were located to chromosome13q36-41, 10p11 and 5q25, in the regions that were syntenic to the homologs of human genes, respectively. Semi-quantitative RT-PCR showed that porcine adiponectin mRNA was specifically expressed in adipose tissue and porcine adipoR1 and adipoR2 mRNA were ubiquitously expressed in many tissues except brain. Comparison to adipoR2 mRNA which was highly expressed in liver, heart, kidney, adipose tissues and lung, adipoR1 mRNA was expressed at relatively high levels in porcine muscle, leukocytes and epididymis. Our data provide basic molecular information useful for the further investigation on the function of the three genes. 相似文献
14.
Chen G Bourneuf E Marklund S Zamaratskaia G Madej A Lundström K 《Journal of animal science》2007,85(10):2457-2463
Androstenone is one of the main compounds responsible for boar taint, and 3beta-hydroxysteroid dehydrogenase (3betaHSD) might be involved in its metabolism. In this study, the gene expression of 3betaHSD and 17beta-hydroxysteroid dehydrogenase (17betaHSD) were determined by real-time PCR analysis and related to the concentrations of androstenone, testosterone, and estrone sulphate (E1S). The experiments were performed on gonadally intact male pigs classified based on high or low fat androstenone concentrations, as predetermined by HPLC, as well as on immunocastrated and surgically castrated male pigs. The male pigs with high androstenone concentrations in fat had low 3betaHSD gene expression in liver and testis. Moreover, the 17betaHSD gene expression in liver, but not in testis, varied negatively with fat androstenone concentrations. Immunocastrated and surgically castrated male pigs had nondetectable concentrations of fat androstenone and plasma testosterone and E1S, and the castration procedure induced a significant increase of 3betaHSD and 17betaHSD gene expression. The mRNA expression was generally much greater from the 3betaHSD than from the 17betaHSD gene. Furthermore, fat androstenone was negatively correlated with liver 3betaHSD gene expression (Pearson correlation, r = -0.69; P < 0.05), and the 17betaHSD gene expression in liver was negatively correlated with plasma E1S (r = -0.95; P < 0.001), indicating an important role of liver 17betaHSD in the estrogen metabolism of gonadally intact male pigs. Another strong correlation was found between 3betaHSD and 17betaHSD gene expression in liver of the gonadally intact male pigs (r = 0.86; P < 0.01), possibly reflecting similar regulation mechanisms of these genes. 相似文献
15.
Liu BH Wang PH Wang YC Cheng WM Mersmann HJ Ding ST 《Journal of animal science》2008,86(12):3377-3384
Adiponectin is an adipocyte-derived hormone that can improve insulin sensitivity. Its functions in regulating glucose utilization and fatty acid metabolism in mammals are mediated by 2 subtypes of adiponectin receptors (AdipoR1 and AdipoR2). This study was conducted to determine the effect of fasting on the expression of adiponectin and its receptors. The expression of adiponectin was not affected in s.c. adipose tissue, but adiponectin expression increased in visceral adipose tissue after fasting. In contrast, expression of both AdipoR mRNA was increased in the liver and s.c. adipose tissue of 24-h-fasted pigs compared with fed pigs, but the mRNA in muscle and visceral adipose tissue was not affected by fasting. A third putative adiponectin receptor, T-cadherin, was cloned and the mRNA expression was determined. T-Cadherin has been recognized to act as a vascular adiponectin receptor in vascular endothelial and smooth muscle cells. Our data showed that the expression of T-cadherin was decreased in the muscle of fasted pigs, suggesting that the expression of T-cadherin can be regulated by feeding status. In summary, in young pigs, adiponectin mRNA was up-regulated by fasting in visceral, but not s.c., adipose tissue, whereas AdipoR1 and AdipoR2 mRNA were increased in s.c., but not visceral, adipose tissue. The adiponectin receptor, T-cadherin, was expressed in s.c. and visceral adipose tissue and in muscle, but only muscle mRNA expression was decreased by fasting. 相似文献
16.
冷应激条件下猪脂肪组织中脂联素及其受体 mRNA水平的表达变化 总被引：2，自引：2，他引：0
为了研究冷应激对脂肪代谢的影响,本试验分别在-15~-10 ℃、-10~-5 ℃、-5~0 ℃、15~18 ℃温度条件下采取猪颈部、背部皮下和内脏系膜脂肪组织,通过荧光定量RT-PCR方法检测脂联素及其受体mRNA的表达水平。结果显示,随着冷应激强度的逐渐加大,在颈部、背部皮下、内脏系膜Adiponectin mRNA的表达量逐渐降低,差异显著(P＜0.05);内脏系膜中AdipoR 1和AdipoR 2 mRNA表达量先逐渐升高后恢复正常,且差异极显著(P＜0.01);背部皮下AdipoR 2 mRNA表达量先逐渐降低后恢复正常,差异极显著(P＜0.01),AdipoR 1 mRNA表达量没有明显变化;颈部皮下AdipoR 2 mRNA的表达量先逐渐升高后恢复正常,差异极显著(P＜0.01),AdipoR 1 mRNA的表达量先升高后恢复正常,而后又升高,差异极显著(P＜0.01)。结果表明,脂联素及其受体参与冷应激过程,它们可能与冷应激条件下脂肪组织的重新分布有重要的关系。 相似文献
17.
旨在研究不同饲喂水平对绵羊睾丸发育、睾酮（T）合成相关基因与雄激素受体（androgen receptor, AR）表达的影响。本研究采用单因素完全随机试验设计,将18只健康、体重相近（（35±0.5） kg）的杜泊羊（♂）×晋中绵羊（♀）杂F1代4月龄公羔随机分为3组,每组6只,分别按照自由采食（AL组）、自由采食量的65%（AL65组）和自由采食量的40%（AL40组）3个水平进行饲喂。当AL组任意1只羔羊体重达到50 kg时全部屠宰,测定睾丸的周径与长度后采集睾丸组织,通过苏木精-伊红（hematoxylin-eosin,H-E）染色观察曲精细管生精上皮结构;酶联免疫（enzyme linked immunosorbent assay,ELISA）法测定睾酮（testosterone,T）的水平;用定量PCR（quantitative real-time PCR,qRT-PCR）检测T合成相关基因和AR mRNA的表达情况;通过免疫组化和Western blotting的方法对绵羊睾丸组织中的AR进行定位与定量分析。结果表明,AL40组羔羊睾丸周径和长度显著低于AL组（P<0.05）,但与AL65组差异不显著（P>0.05）;AL40组曲精细管生精上皮厚度与AL65组差异不显著（P>0.05）,但均显著低于AL组（P<0.05）。随着饲喂水平的提高,生精细胞和间质细胞密度显著增加（P<0.05）,T水平和STAR、3β-HSD基因以及AR mRNA和蛋白表达量均显著提高（P<0.05）;睾丸间质细胞、初级精母细胞、精子细胞、管壁肌样细胞层和间质血管平滑肌细胞中均观察到AR阳性产物。综上所述,绵羊的睾丸发育、T含量、T合成相关基因和AR的表达均受到日粮营养水平的调控。日粮营养水平可能通过改变T水平和生精细胞对T的敏感性来调控精子发生过程,从而影响其性成熟和繁殖性能。 相似文献