共查询到20条相似文献，搜索用时 250 毫秒
1.
《畜牧与兽医》2017,(1):6-11
旨在研究雌激素与前列腺素受体对奶牛输卵管上皮细胞输卵管蛋白合成与分泌的调控作用。用荧光定量PCR检测了奶牛输卵管上皮细胞输卵管蛋白mRNA的表达;采用Western blot检测了奶牛输卵管上皮细胞输卵管蛋白的表达。同时,加入雌激素(10~(-10)mol/L)和butaprost(PE受体激动剂,10~(-6)mol/L),雌激素(10~(-10)mol/L)和fluprostenol(PF受体激动剂,10-6mol/L),分别观察对输卵管蛋白表达的影响。结果表明:雌激素与PGE_2受体对奶牛输卵管上皮细胞输卵管蛋白的分泌调控具有协同作用;雌激素与PGF_(2α)受体对奶牛输卵管上皮细胞输卵管蛋白的分泌调控具有间接拮抗作用。 相似文献
2.
《中国兽医学报》2017,(2):345-351
为验证前列腺素类化合物对输卵管分泌细胞因子有调控作用,以前列腺素F2α受体激动剂fluprostenol对奶牛输卵管上皮细胞合成分泌细胞因子TGF-α、TGF-β3、FGF-2、LIF和GM-CSF的调控机制为研究对象,采用实时荧光定量PCR技术检测吲哚美辛(10-5 mol/L)作用不同时间(2,4,8,16,24,48h)对奶牛输卵管上皮细胞TGF-α、TGF-β3、FGF-2、LIF和GM-CSF mRNA表达的影响。结果显示,fluprostenol对奶牛输卵管上皮细胞中TGF-α和FGF-2mRNA有正调控的作用,均在4h时mRNA的表达量达到峰值;fluprostenol对奶牛输卵管上皮细胞中LIF和GMCSF mRNA有双重调控作用,均是先短暂显著促进(P<0.05)其mRNA的表达,之后表现为极显著抑制(P<0.01),并均在2h时达到表达量峰值;fluprostenol对奶牛输卵管上皮细胞中TGF-β3mRNA起到正调控作用,作用48h时与空白对照组相比极显著升高(P<0.01),达到峰值。 相似文献
3.
《中国畜牧兽医》2015,(6)
本试验旨在观察前列腺素E2受体激动剂(布他前列腺素(butaprost))与雌激素对奶牛输卵管上皮细胞中转化生长因子β3(TGFβ3)表达的影响,阐明butaprost和雌激素对奶牛输卵管上皮细胞TGFβ3有无协同调控作用。采用胰酶消化法及机械法分离培养奶牛输卵管上皮细胞,分别将butaprost和雌激素作用于体外培养的奶牛输卵管上皮细胞,采用实时荧光定量PCR技术检测butaprost和雌激素对奶牛输卵管上皮细胞中TGFβ3mRNA表达的影响。结果显示,与0h作用组相比,雌激素作用16、24和48h时对奶牛输卵管上皮细胞TGFβ3的表达量均极显著升高(P0.01),4h的表达量极显著降低(P0.01);且受体激动剂butaprost和雌激素有协同调控TGFβ3的效应;加入吲哚美辛后能有效抑制内源性前列腺素对TGFβ3表达的作用。结果表明,butaprost和雌激素可调控奶牛输卵管上皮细胞TGFβ3mRNA的表达。 相似文献
4.
本试验旨在观察前列腺素E2受体激动剂(布他前列腺素(butaprost))与雌激素对奶牛输卵管上皮细胞中转化生长因子β3(TGFβ3)表达的影响,阐明butaprost和雌激素对奶牛输卵管上皮细胞TGFβ3有无协同调控作用.采用胰酶消化法及机械法分离培养奶牛输卵管上皮细胞,分别将butaprost和雌激素作用于体外培养的奶牛输卵管上皮细胞,采用实时荧光定量PCR技术检测butaprost和雌激素对奶牛输卵管上皮细胞中TGFβ3 mRNA表达的影响.结果显示,与0 h作用组相比,雌激素作用16、24和48 h时对奶牛输卵管上皮细胞TGFβ3的表达量均极显著升高(P< 0.01),4 h的表达量极显著降低(P< 0.01);且受体激动剂butaprost和雌激素有协同调控TGFβ3的效应;加入吲哚美辛后能有效抑制内源性前列腺素对TGFβ3表达的作用.结果表明,butaprost和雌激素可调控奶牛输卵管上皮细胞TGFβ3 mRNA 的表达. 相似文献
5.
研究孕酮(P4)对绵羊输卵管上皮细胞β-防御素2(SBD2)基因表达的影响,探讨P4调节SBD2表达的潜在机制。建立绵羊输卵管上皮细胞体外培养体系,用不同浓度(10^-6、10^-7、10^-8、10^-9、10^-10mol/L)P4分别处理绵羊输卵管上皮细胞0、2、6、12、24、48h,筛选P4诱导绵羊输卵管上皮细胞SBD2mRNA表达的最佳条件。然后使用10-6mol/L孕激素核受体拮抗剂RU486,50μmol/L蛋白激酶C(PKC)信号通路阻断剂H7预处理细胞1h,再使用P4诱导SBD2mRNA表达的最佳条件处理细胞,同时设只添加阻断剂(RU486和H7)处理组、只添加孕酮(P4)处理组和空白对照组,通过RT-qPCR技术检测SBD2mRNA的表达变化。10-9mol/LP4诱导绵羊输卵管上皮细胞6h和24h时SBD2mRNA表达显著高于对照组(P<0.01),且与P4组相比,添加RU486和H7后显著抑制了P4诱导的SBD2mRNA的表达水平(P<0.01)。P4以浓度和时间依赖性方式显著增加SBD2mRNA表达,并且诱导可能通过孕酮核受体(PR)介导的基因组途径以及PKC信号通路来提高绵羊输卵管上皮的先天免疫防御能力。 相似文献
6.
7.
试验旨在阐明雌激素(E2)对体外培养的奶牛输卵管组织中环氧合酶-1(cyclooxygenase-1,COX-1)与环氧合酶-2(cyclooxygenase-2,COX-2)基因表达的影响。分离培养奶牛输卵管组织,用不同浓度的E2作用于奶牛输卵管组织,采用实时荧光定量PCR与Western blotting检测COX-1与COX-2 mRNA和蛋白的表达量。结果表明,E2作用浓度为10-11 mol/L时奶牛输卵管组织中的COX-1与COX-2 mRNA相对表达量达到高峰;E2作用时间为8 h时COX-1 mRNA的相对表达量达到高峰,E2作用时间为2 h时COX-2 mRNA的相对表达量达到高峰;浓度为10-11 mol/L的E2作用不同时间后,COX-1蛋白的相对表达量在8~48 h显著升高;没有检测到COX-2蛋白的表达。 相似文献
8.
《中国兽医学报》2015,(9):1553-1556
观察雌激素(β-雌二醇)对奶牛输卵管上皮细胞膜结合型前列腺素E2合酶-1(mPGES-1)表达的影响,并探讨β-雌二醇对奶牛输卵管上皮细胞合成分泌PGs调控的作用机制。采用胰酶消化法及机械法分离培养奶牛输卵管上皮细胞,应用荧光定量RT-PCR技术检测β-雌二醇对奶牛输卵管上皮细胞mPGES-1 mRNA表达的影响,应用Incell Western技术检测β-雌二醇对奶牛输卵管上皮细胞mPGES-1蛋白表达的影响。结果显示,与空白对照相比,β-雌二醇能够显著和极显著地促进奶牛输卵管上皮细胞中mPGES-1基因和蛋白的表达。本试验结果表明,β-雌二醇能够对奶牛输卵管上皮细胞中mPGES-1产生调节作用。 相似文献
9.
绵羊在发情周期中各生殖激素浓度变化与卵泡发育、成熟和排卵有着密切的关系。为了研究巴美肉羊血清生殖激素的动态变化及其与排卵数关系,试验采用电化学法,测定了12只成年母羊发情期血清中2种类固醇激素(E2和P4)的浓度水平,分析其动态变化规律,并用SAS 9.0的方差分析程序分析激素浓度与排卵数的关系。结果表明,两种激素在排单卵组和排双卵组绵羊间变化规律不同,E2在排单卵组表现为先下降后升高的变化趋势,在排双卵组表现为持续下降趋势;P4在排单卵组表现为持续上升的趋势,在排双卵组为先上升后下降的变化趋势。排单卵和排双卵组绵羊在各时间点的E2和P4激素浓度差异均不显著(P＞0.05)。 相似文献
10.
[目的]探讨17β-雌二醇(E2)对体外培养的绵羊输卵管上皮细胞内抗菌肽SBD-2基因表达的影响。[方法]根据E2添加剂量设10-6mol/L组、10-7mol/L组、10-8mol/L组、10-9mol/L组和10-10mol/L组,各组细胞于加药后2、6、12、24及48 h,分别采用real-time RT-PCR技术检测E2对绵羊输卵管上皮细胞内SBD-2 m RNA表达量的影响,同时设相应的对照组。[结果]以剂量为10-8mol/L的E2处理输卵管上皮细胞6 h后,其SBD-2的表达量达到极值,极显著高于对照组(P0.01),以剂量为10-10mol/L的E2处理输卵管上皮细胞24 h和48 h后,也能显著促进SBD-2的表达(P0.01,P0.05),之后随着各时间段E2剂量的增加,SBD-2 m RNA的表达量呈逐渐降低趋势。[结论]一定剂量的E2能够在处理细胞后的特定时间促进绵羊输卵管上皮细胞中SBD-2 m RNA的表达,E2对输卵管上皮细胞SBD-2 m RNA表达的调节作用存在时间效应与剂量依赖关系。 相似文献
11.
Takagi M Yamamoto D Ogawa S Otoi T Ohtani M Miyamoto A 《Veterinary journal (London, England : 1997)》2008,177(3):398-404
The bovine placenta contains local vasoactive-related systems, including angiotensin-converting enzyme (ACE), endothelin-1 (ET-1), ET-A receptor (ETAR) and ET-B receptor (ETBR), as well as arachidonic acid (AA) cascade-related enzymes, such as cyclooxygenase-2 (Cox-2), prostaglandin E-synthase (PGES) and prostaglandin F-synthase (PGFS). The mRNA expression of these molecules was examined in bovine placentomes (caruncles and cotyledons) collected immediately (0 h) and 6h after spontaneous parturition from 15 cows with early (fetal membranes released within 6 h of parturition) or late (fetal membranes released 6-12 h after parturition) detachment, as well as from 15 pregnant cows at a slaughterhouse. Significant differences were observed in expression of ET-1, ETAR and ETBR mRNAs between gestation and the postpartum period in both caruncles and cotyledons. Significant differences were also found between 0 and 6 h postpartum in the expression of ETBR mRNA in the early detachment group and PGES mRNA in the early and late detachment groups. Compared to PGFS, both Cox-2 and PGES exhibited opposite mRNA expression patterns during gestation and the postpartum period. The vasoactive-related peptide systems and AA cascade-related enzymes may mediate placental development and fetal membrane detachment after parturition in cattle. 相似文献
12.
Increased secretion of prostaglandin F2α (PGF2α) within the uterus because of uterine inflammation can cause luteolysis and result in early embryonic loss. Supplementation with polyunsaturated fatty acids (PUFAs) has been shown to influence PG production in many species, although the effects on the mare remain unknown. The present study aimed to determine fatty acid uptake in equine endometrial explants and evaluate their influence on PG secretion and expression of enzymes involved in PG synthesis in vitro. Equine endometrial explants were treated with 100 μM arachidonic acid, eicosapentaenoic acid, or docosahexaenoic acid and then challenged with oxytocin (250 nM) or lipopolysaccharide (LPS; 1 μg/mL). Production of PGF2α and PG E2 (PGE2) was measured, and mRNA expression of enzymes involved in PG synthesis was determined with quantitative real-time PCR. Media concentrations of PGF2α and PGE2 were higher (P < 0.0001) from endometrial explants challenged with oxytocin or LPS compared with controls despite which fatty acid was added. Only DHA lowered (P < 0.0001) media concentrations of PGF2α and PGE2 from explants. Endometrial explants stimulated with oxytocin had increased expression of PG-endoperoxide synthase 1 (PTGS1; P < 0.02), PG-endoperoxide synthase 2 (PTGS2; P < 0.001), PG F2α synthase (PGFS; P < 0.01), PG E2 synthase (PGES; P < 0.01), and phospholipase A2 (PLA2; P < 0.005) compared with controls and regardless of fatty acid treatment; whereas stimulation with LPS increased expression of PTGS2 (P < 0.004), PGFS (P < 0.03), PGES (P < 0.01), and PLA2 (P < 0.01) compared with controls and regardless of fatty acid treatment. Treatment with PUFAs, specifically DHA, can influence PG secretion in vitro through mechanisms other than enzyme expression. 相似文献
13.
14.
Monika Jamioł Jacek Wawrzykowski Marta Kankofer 《Reproduction in domestic animals》2021,56(7):1040-1049
One of the most important processes determining the proper course of gestation and its physiological termination in cows is the adhesion of epithelial cells allowing for direct contact of maternal and foetal parts of the placenta. Throughout pregnancy, placental cells are under strict hormonal control, which among others regulates the concentration and activity of specific proteins participating in the extracellular matrix remodelling of foetal membranes. The aim of the study was to evaluate the influence of progesterone and prostaglandin F2α on the adhesion of epithelial cells at early-mid pregnancy in cows. Additionally, the impact of selected hormones on anti-adhesive properties of decorin was evaluated. Caruncular epithelial cells were isolated from healthy cows during pregnancy, immediately after slaughter. Primary cell cultures derived from the 2nd and 4th month of gestation were used in the experiments. The viability of cells was assessed by MTT assay. The adhesion of cells to fibronectin was measured spectrophotometrically. The activity of metalloproteinases was confirmed by the metalloproteinase assay. Progesterone (10–5 and 10–7 mol/L) and prostaglandin F2α (10–4, 10–5 and 10–7 mol/L) increased the viability of bovine caruncular epithelial cells in the 2nd month of pregnancy. The treatment with prostaglandin F2α significantly reduced the number of adherent cells from the 2nd month of gestation at the doses of 10–4 and 10–5 mol/L. Both progesterone and prostaglandin F2α were shown to have an effect of decorin resulting in both a decrease in metalloproteinase activity and an increase in adhesion of cells to fibronectin. 相似文献
15.
Concentration effect of prostaglandin E2 on the growth factor expression and cell proliferation in bovine endometrial explants and their kinetic characteristics 
下载免费PDF全文
下载免费PDF全文 S Zhang W Mao Q Li R Gao Y Zhang L Gao C Fu J Wu Y Deng Y Shen T Li B Liu J Cao 《Reproduction in domestic animals》2018,53(1):143-151
Bovine endometrium undergoes various physiological and histological changes that are necessary for blastocyst implantation during oestrous cycle. From pro‐oestrus to late‐oestrus, endometrium thickens gradually for implantation preparation and exhibits remarkable capacity for self‐repair after uterine lining shedding while implantation does not occur. The prostaglandin E2 (PGE 2) secretion pattern is synchronized with endometrial growth during oestrous cycles in bovine endometrium; however, limited information is available regarding the association between PGE 2 secretion and endometrial growth. In this study, the concentration (10?9 to 10?5 M) and time effect (2–36 hr) of PGE 2 treatment on a series of growth factors are essential for endometrial growth including connective tissue growth factor (CTGF ), fibroblast growth factor‐2 (FGF ‐2), interleukin‐8 (IL ‐8), transforming growth factor‐β1 (TGF ‐β1), matrix metalloproteinase‐2 (MMP ‐2), and vascular endothelial growth factor A (VEGFA ) mRNA and protein expression, and proliferation of epithelial and fibroblast cells was investigated in bovine endometrial explants in vitro. The results indicated that PGE 2 at concentration about 10?7 to 10?5 M could up‐regulate CTGF , FGF ‐2, IL ‐8, MMP ‐2, TGF ‐β1, VEGFA mRNA and protein expression, and could induce the proliferation of epithelial and fibroblast cells and reduce the proapoptotic factor (caspase‐3) expression in bovine endometrial explants in vitro. These results collectively improved the possibility of PGE 2 functions in endometrial growth during oestrous cycles. 相似文献
16.
Ahmed EZZAT AHMED Hayato SAITO Tatsuru SAWADA Tomoyoshi YAEGASHI Jin JIN Ken SAWAI Tetsuro YAMASHITA Tsutomu HASHIZUME 《Animal Science Journal》2011,82(1):73-77
The aims of the present study were to clarify the effect of kisspeptin10 (Kp10) on the secretion of growth hormone (GH) from bovine anterior pituitary (AP) cells, and evaluate the ability of sex steroid hormones to enhance the sensitivity of somatotrophic cells to Kp10. AP cells prepared from 8–11‐month‐old castrated calves were incubated for 12 h with estradiol (E2, 10?8 mol/L),progesterone (P4, 10?8 mol/L), testosterone (T, 10?8 mol/L), or vehicle only (control), and then for 2 h with Kp10. The amount of GH released in the medium was measured by a time‐resolved fluoroimmunoassay. Kp10 (10?6 or 10?5 mol/L) significantly stimulated the secretion of GH from the AP cells regardless of steroid treatments (P < 0.05), and E2, P4, and T had no effect on this response. The GH‐releasing response to growth hormone‐releasing hormone (GHRH, 10?8 mol/L) was significantly greater than that to Kp10 (P < 0.05). The present results suggest that Kp10 directly stimulates the release of GH from somatotrophic cells and sex steroid hormones do not enhance the sensitivity of these cells to Kp10. Furthermore, they suggest that the GH‐releasing effect of Kp10 is less potent than that of GHRH. 相似文献
17.
Szóstek AZ Siemieniuch MJ Deptula K Woclawek-Potocka I Majewska M Okuda K Skarzynski DJ 《Domestic animal endocrinology》2011,41(1):14-23
Ovarian steroids assure an optimum environment for the final maturation of oocytes, gamete transport, fertilization, and early embryonic development. The aim of experiment 1 was to examine the influence of ovarian steroids on tumor necrosis factor-α (TNF-α)- or nitric oxide (NO)-regulated prostaglandin (PG), and nitrite/nitrate (NO2/NO3) secretion by cultured bovine oviductal epithelial cells (BOECs). BOECs were pretreated with 17β-estradiol (E2; 10−9 M) and/or progesterone (P4; 10−7 M) for 24 h. For the next 24 h, BOECs were treated with TNF-α (10 ng/mL) or spermine nitric oxide complex (NONOate; 10−5 M). Prostaglandin F2α and PGE2 secretion was measured in medium by ELISA. The pretreatment of cells with P4 (progesterone), E2 (17 β-estradiol), or E2/P4 augmented TNF-α-induced PGF2α and PGE2 secretion (P < 0.01). The pretreatment of cells with E2 or E2/P4 increased NONOate-induced PGF2α and PGE2 secretion (P < 0.01). TNF-α induced NO2/NO3 production by BOECs. The pretreatment of cells with E2 augmented only TNF-α-induced NO2/NO3 production (P < 0.05). The aim of experiment 2 was to examine the influence of TNF-α, NO, and ovarian steroids on the protein content of enzymes specifically involved in PG and NO production, PG synthases, and NO synthases (NOSs). BOECs were treated with TNF-α (10 ng/mL) or NONOate (10−5 M). TNF-α increased the protein content of PGG/H synthase, PGF synthase, and PGE synthase (P < 0.05) and endothelial and inducible NOSs (P < 0.05). Nitric oxide increased the protein content of PGF synthase, PGE synthase, endothelial NOS, and inducible NOS (P < 0.05). These results show possible linkage between TNF-α and NO, modulated by ovarian steroids, in the regulation of PG synthesis by BOECs that may be important for triggering the process of oviductal contractions. 相似文献
18.
[目的]观察EP2受体激动剂Butaprost对奶牛子宫内膜上皮细胞中血管内皮生长因子(vascular endothelial growth factor,VEGF)基因表达的影响,探讨前列腺素类化合物对奶牛子宫内膜组织修复的机制。[方法]分离培养奶牛子宫内膜上皮细胞,采用荧光定量PCR技术检测EP2受体激动剂Butaprost对奶牛子宫内膜上皮细胞中VEGFmRNA表达的影响。[结果]10-6mol/L的Butaprost作用于奶牛子宫内膜上皮细胞4、8、16、24h可显著(P<0.05)或极显著(P<0.01)地促进VEGFmRNA的表达。[结论]EP2受体激动剂Butaprost能够促进奶牛子宫内膜上皮细胞中VEGF基因的表达。 相似文献
19.
Claudia Maria Bertan Membrive Pauline Martins da Cunha Flávio Vieira Meirelles Mario Binelli 《畜牧与生物技术杂志(英文版)》2014,5(1):25
Background
Estradiol (E2) is required for luteolysis in cows and its injection stimulates prostaglandin F2α (PGF2α) release. The main goal of our study was to investigate the ability of endometrial explants and cells treated with E2 and the calcium ionophore (CI) A23187 to synthesize PGF2α.Results
Treatment with E2in vivo resulted in a 48.4% increase of PGF2α production by endometrial explants treated in vitro with A23187. Production of PGF2α was better stimulated with A23187 at concentrations of 10-6 and 10-5 mol/L compared with other concentrations used. The concentration of PGF2α for untreated bovine endometrial cell cultures was 33.1 pg/mL, while for cultures treated with E2, A23187, or a combination of E2 and A23187, the PGF2α concentration was 32.5, 92.4 and 145.6 pg/mL, respectively.Conclusions
Treatment with A23187 tended to stimulate PGF2α production. In the presence of E2, A23187 significantly stimulated PGF2α synthesis. It appears that A23187 potentiates the effects of E2 with respect to synthesis of endometrial PGF2α in cattle. 相似文献20.
The responses of the vasculature of isolated, non-sensitized, bovine external ears to histamine and serotonin (5-HT) were evaluated while they were being perfused with Krebs-Henseleit solution, Histamine (10–5 mol/L to 5×10–3 mol/L) and 5-hydroxytryptamine (5-HT) (10–9 mol/L to 10–2 mol/L) caused increased vascular resistance. Mepyramine (10–7 mol/L), cimetidine (10–5 mol/L) and atropine (10–6 mol/L) inhibited the responses to histamine. The responses to 5-HT were inhibited by methysergide (10–9 mol/L) and potentiated by morphine (10–5 mol/L). These results suggest the presence of H1 and H2 histamine, and 5-HT receptors in bovine auricular vessels, all of which cause net vasoconstriction. 相似文献