共查询到18条相似文献，搜索用时 125 毫秒
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为探讨绒山羊皮肤组织中催乳素受体(prolactin receptor,PRLR)基因mRNA表达水平与绒山羊绒毛生长的关系,通过埋植褪黑激素(me-latonin,MT)刺激绒毛提前生长,利用实时荧光定量聚合酶链式反应(Real-time PCR)技术检测绒山羊从绒毛开始萌发到绒毛快速生长期间皮肤组织中PRLR基因mRNA表达量的变化。结果显示:在内蒙古白绒山羊皮肤中总的催乳素受体(T-PRLR)基因mRNA表达量从6至11月逐渐降低,而MT埋植组的短型催乳素受体(S-PRLR)mRNA表达水平在绒毛快速生长的7、8、9月份显著高于对照组(P<0.05)。结果表明,山羊绒毛生长可能与S-PRLR mRNA表达水平升高有直接的关系。 相似文献
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为研究不同光周期对肉鸡胸腺和脾脏褪黑激素受体(Mel1a、Mel1b、Mel1c)表达的影响，阐明光周期影响肉鸡免疫功能的可能途径，本试验选用0日龄雄性817肉鸡45只，按照光照∶黑暗为8 h∶16 h、12 h∶12 h、16 h∶8 h三种不同的光周期随机分为Ⅰ、Ⅱ、Ⅲ组。饲养2周后取肉鸡胸腺和脾脏组织，测定其器官指数，采用反转录聚合酶链式反应(RT-PCR)方法检测其褪黑激素受体Mel1a、Mel1b和Mel1c基因的相对表达水平。结果显示，与Ⅱ组和Ⅲ组相比，Ⅰ组胸腺指数分别提高了16.13%(P<0.05)和22.03%(P<0.05),脾脏指数分别提高了19.40%(P>0.05)和21.21%(P<0.05),胸腺Mel1a基因相对表达水平分别升高了27.25%(P<0.05)和88.56%(P<0.05),脾脏Mel1a基因相对表达水平分别升高了11.53%(P<0.05)和19.08%(P<0.05),胸腺Mel1b基因相对表达水平分别升高了15.59%(P>0.05)和30.65%(P<0.05),脾脏Mel... 相似文献
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本试验从内蒙古绒山羊脑垂体中提取总RNA,根据已发表的相近物种褪黑激素受体1a(melatonin receptor 1 a,MTNR1a)基因序列设计引物,利用实时荧光定量逆转录多聚酶链反应(real-time quantitative,RT-PCR)技术、组织原位杂交技术检测MTNR1a基因在内蒙古绒山羊垂体中的表达。结果显示,通过RT-PCR方法检测到MTNR1a基因在内蒙古绒山羊垂体中表达,利用原位杂交技术进一步确定MTNR1a基因在垂体中表达分布。结果提示,垂体是褪黑激素作用的靶器官,褪黑激素对绒山羊季节性繁殖的影响有可能是与垂体分泌的某些激素相互作用而发挥作用的。 相似文献
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本实验旨在探明绒山羊从绒毛生长前到绒毛生长旺盛期总的催乳素受体(T-PRLR)基因和短型催乳素受体(S-PRLR)基因mRNA在皮肤中表达量的变化,为进一步探明山羊绒毛生长机理奠定基础。实验选用18只年龄、体重相近的内蒙古白绒山羊,随机分为2组,每组9只,其中一组皮下埋植褪黑激素(M T)刺激山羊绒毛提前萌发和降低血液中催乳素(PR L)浓度。mRNA的表达量利用实时荧光定量聚合酶链式反应技术检测。结果表明:在内蒙古白绒山羊皮肤当中T-PRLR基因mRNA表达量从6—11月呈现逐渐降低的规律,但S-PRLR mRNA相对T-PRLR mRNA表达水平呈现上升趋势。本实验结果显示,伴随着绒毛生长速度的改变PRLR基因的可变剪接率也发生了改变,在绒山羊绒毛生长过程中S-PRLR起了主要作用。 相似文献
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Rajesh Kumar Kharwar Vaishali Singh Chandana Haldar 《Anatomia, histologia, embryologia》2020,49(4):457-463
The role of circulatory steroid hormone along with melatonin in lung of any seasonally breeding bird has never been explored so far. This could be interesting because steroid hormones are immunosuppressive while melatonin is immunostimulatory in nature. In our present study, we report the effect of exogenous melatonin and testosterone on expression of melatonin receptor subtypes (Mel1a and Mel1b) and androgen receptor in lung of a tropical bird Perdicula asiatica. Birds were collected from vicinity of Varanasi and acclimatized in laboratory with sufficient food and water. The birds were treated with melatonin and testosterone at dose of 25 µg/100 g B.wt./day and 1 mg/100 g B.wt./day, respectively, for 28 days. At the end of the experiment, the birds were sacrificed and lung tissue and blood sample were collected for immunohistochemistry, Western blot analysis and hormonal assay. Testosterone treatment increased circulatory testosterone and upregulated expression of androgen receptors whereas downregulated expression of melatonin receptor subtypes Mel1a and Mel1b. Melatonin administration increased peripheral melatonin and upregulated expression of melatonin receptor subtypes Mel1a and Mel1b while downregulated androgen receptor. Thus, our results suggest that a trade-off relationship between melatonin and testosterone exists in regulation of their receptors in lung of Perdicula asiatica. 相似文献
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Hasan Riaz Muhammad Rizwan Yousuf Aixin Liang Guo Hua Hua Liguo Yang 《Animal Science Journal》2019,90(4):473-480
This study was aimed to address melatonin receptor expression, mRNA level of hypothalamus and hypophysis hormone receptors (GnRHR, FSHR, and LHR), steroidogenesis, cell cycle, apoptosis, and their regulatory factors after addition of melatonin for 24 hr in cultured buffalo granulosa cells (GCs). The results revealed that direct addition of different concentrations of melatonin (100 pM, 1 nM, and 100 nM) resulted in significant upregulation (p < 0.05) of mRNA level of melatonin receptor 1a (MT1) without affecting melatonin receptor 1b (MT2). Melatonin treatment significantly downregulated (p < 0.05) mRNA level of FSH and GnRH receptors, whereas 100 nM dose of melatonin significantly increased mRNA level of LH receptor. Treatment with 100 nM of melatonin significantly decreased the basal progesterone production with significant decrease (p < 0.05) in mRNA levels of StAR and p450ssc, and lower mRNA level of genes (Insig1, Lipe, and Scrab1) that affect cholesterol availability. Melatonin supplementation suppressed apoptosis (100 nM, p < 0.05) and enhanced G2/M phase (1 nM, 100 nM, p < 0.05) of cell cycle progression which was further corroborated by decrease in protein expression of caspase‐3, p21, and p27 and increase in bcl2. Our results demonstrate that melatonin regulates gonadotrophin receptors and ovarian steroidogenesis through MT1. Furthermore, the notion of its incorporation in apoptosis and proliferation of buffalo GCs extends its role in buffalo ovaries. 相似文献
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《中国畜牧杂志》2019,(4)
为研究核受体RORα对小鼠睾丸间质细胞凋亡的作用,实验使用褪黑素(MT)、核受体RORα拮抗剂SR1001、MT+SR1001、无血清培养液处理小鼠睾丸间质细胞36 h,检测细胞活力、细胞凋亡率以及凋亡相关基因Bcl2、Bax mRNA表达量。结果表明:与对照组相比,褪黑素可极显著降低细胞凋亡率、提高细胞活力及抗凋亡基因Bcl2 mRNA表达量(P<0.01),抑制促凋亡基因Bax mRNA表达量(P<0.05);与MT组相比,MT+SR1001处理后细胞活力(P<0.05)及Bcl2表达量(P<0.01)降低,细胞凋亡率极显著上升(P<0.01),Bax表达量显著上升(P<0.05)。结果提示,褪黑素可通过RORα途径抑制小鼠睾丸间质细胞凋亡。 相似文献
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Ji Hyeon Ahn Joon Ha Park In Hye Kim Jae-Chul Lee Bing Chun Yan Min Sik Yong Choong Hyun Lee Jung Hoon Choi Ki-Yeon Yoo In Koo Hwang Seung Myung Moon Hyung-Cheul Shin Moo-Ho Won 《Journal of veterinary science (Suw?n-si, Korea)》2014,15(3):335-342
Melatonin affects diverse physiological functions through its receptor and plays an important role in the central nervous system. In the present study, we compared immunoreactivity patterns of arylalkylamine N-acetyltransferase (AANAT), an enzyme essential for melatonin synthesis, and melatonin receptor type 1B (MT2) in the spinal cord of young adult (2~3 years) and aged (10~12 years) beagle dogs using immunohistochemistry and Western blotting. AANAT-specific immunoreactivity was observed in the nuclei of spinal neurons, and was significantly increased in aged dog spinal neurons compared to young adult spinal neurons. MT2-specific immunoreactivity was found in the cytoplasm of spinal neurons, and was predominantly increased in the margin of the neuron cytoplasm in aged spinal cord compared to that in the young adult dogs. These increased levels of AANAT and MT2 immunoreactivity in aged spinal cord might be a feature of normal aging and associated with a feedback mechanism that compensates for decreased production of melatonin during aging. 相似文献
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为了从分子水平上了解鸡褪黑激素受体（MTNR）基因在开产前后不同组织中的表达差异,以β-actin基因为内标基因,运用实时荧光定量PCR方法,比较了MTNR1A、MTNR1B和MTNR1C这3个受体基因在心脏、肝脏、输卵管、卵巢、脑和视交叉各组织及在鸡开产前后表达量的差异。结果表明,MTNR1A只在开产后各组织中的表达量存在差异,其中以卵巢组织表达量最高,心脏中表达量最低。MTNR1B和MTNR1C的表达量在开产前或开产后均表现出组织间的显著差异;在开产前后的各组织中,MTNR1B的表达量均以视交叉为最高,卵巢为最低;而MTNR1C的表达量在开产前以心脏中最高,开产后在视交叉中最高,在卵巢组织中的表达量开产前后均为最低。同一组织开产后与开产前比较,MTNR1C基因在心脏、输卵管和脑组织中的表达量呈显著下调趋势。因此,3个受体基因在鸡的不同组织和生理时期存在表达差异。 相似文献
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Larissa Zetouni Gregório Miguel Ferreira de Camargo Patricia Dias da Silva Fonseca Diercles Francisco Cardoso Fernanda Maria Monsalves Gil Naudin Alejandro Hurtado-Lugo Rusbel Raul Aspilcueta-Borquis Marcelo Cervini Humberto Tonhati 《Tropical animal health and production》2014,46(2):337-340
The main environmental factor that affects the regulation of reproductive seasonality is photoperiod through its effects on melatonin secretion. The melatonin receptor MTRN1A appears to be involved in regulating the reproductive seasonality and milk production in the period. The aim of this study was to identify polymorphisms in the MTRN1A gene and their possible associations with milk, fat and protein productions, fat and protein percentages, age at first calving, and first calving interval in buffaloes. Three genotypes (CC, CT, and TT) were identified by PCR-RFLP, and there was a significant association with protein percentage (P?<?0.0001). Further studies are necessary to better understand the influence of melatonin gene and their receptors in the productive functions of buffaloes. 相似文献
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Sandra Soto‐Heras Maria‐Gracia Catal Montserrat Roura Irene Menndez‐Blanco Anna‐Rita Piras Dolors Izquierdo Maria‐Teresa Paramio 《Reproduction in domestic animals》2019,54(2):381-390
Melatonin enhances in vitro embryo development in several species by improving the oocyte developmental competence during in vitro maturation (IVM). Melatonin has a wide range of actions, from scavenging reactive oxygen species (ROS) to regulating gene expression, and it can also act by way of melatonin receptors. The aim of this study was to determine the mechanism of action of melatonin during the IVM of juvenile goat oocytes and the role of the membrane receptors. Melatonin receptor 1 was immunolocalized in cumulus cells and oocytes before and after 24 hr of IVM. The effect of melatonin on oocyte developmental competence was tested in three experimental IVM groups: (a) control, (b) 10?7 M melatonin, and (c) 10?7 M melatonin +10?7 M luzindole (an inhibitor of both melatonin receptors). After IVM oocytes were assessed for ROS levels, mitochondrial activity, adenosine 5′‐triphosphate (ATP) concentration and relative gene expression (ACTB, SLC1A1, SOD1, GPx1, BAX, DNMT1, GCLC and GDF9). IVM‐oocytes were in vitro fertilized and cultured under conventional conditions. Blastocyst rate and quality (differential cell count) were assessed at 8 days post‐fertilization. Melatonin decreased ROS levels, increased mitochondrial activity and ATP content and increased blastocyst quality compared to control group (55.8 vs. 30.4 inner cell mass ICM, p < 0.05). There was no effect on the relative gene expression due to treatment with melatonin. In conclusion, we have showed that melatonin improves oocyte developmental competence in juvenile goats by reducing ROS levels and improving mitochondrial activity. 相似文献
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Sundaresan NR Marcus Leo MD Subramani J Anish D Sudhagar M Ahmed KA Saxena M Tyagi JS Sastry KV Saxena VK 《Veterinary research communications》2009,33(1):49-56
Melatonin (N-acetyl-5-methoxytryptamine), an indole hormone, regulates various biological functions through three different receptor subtypes
(Mel-1a, Mel-1b, and Mel-1c). However, the distribution of different melatonin receptor subtypes in chicken reproductive tissues
was not known. In the present investigation, the partial sequences of ovarian melatonin receptor subtypes (Mel-1a, Mel-1b,
and Mel-1c) were characterized. Further, the expression profile of melatonin receptor subtypes in the granulosa and theca
layers of different preovulatory and postovulatory follicles (POF) were studied by semi-quantitative RT-PCR. The expression
of all three subtypes of melatonin receptors were observed in the ovary of domestic chicken. Analysis of partial sequences
of ovarian melatonin receptors revealed that the melatonin subtypes were identical to the brain receptors. In small white
ovary follicles, we observed only the expression of mel-1b receptors, but not mel-1a or mel-1c receptors. In yellow follicles,
all the three subtypes of receptors expression were noticed. Interestingly, we observed the expression of mel-1a receptor
only in thecal layer, but not in granulosa layer. In contrast, mel-1b and -1c receptors were expressed in both granulosa and
thecal layer. During the regression of POF, we observed significant upregulation of melatonin receptors (mel-1a and 1c) expression,
that downregulated in the later stages of regression. We assume that the expression of melatonin receptors might have been
influenced by the atresia or apoptosis of different follicular layers in POF. Our findings suggest that the differential distribution
of melatonin receptor subtypes might have distinct downstream cellular functions in the ovarian tissues. 相似文献