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为了研究交感神经对小鼠胚胎着床和发育的作用机制,本文筛选出合适的L-苯丙氨酸浓度(320 mg/kg体重),处理孕鼠,观察胚胎着床和发育,通过甲苯胺蓝染色检测子宫局部肥大细胞的变化.研究结果显示,320 mg/kg体重L-苯丙氨酸能显著降低胚胎着床数目,分别下降了45％ (E7)和58％(E9),并且显著延缓胚胎的发育；与对照组相比,着床后子宫局部肥大细胞数目显著降低,分别在E5～E9降低了36.62％、64.59％和23.30％,差异显著.由本研究结果可以推断一定浓度的L-苯丙氨酸可以激活交感神经,影响妊娠早期子宫局部肥大细胞数量,从而改变子宫局部微环境,影响胚胎着床和发育. 相似文献
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《畜牧兽医学报》2018,(11)
本研究旨在以肥大细胞和组织胺为指标探讨大鼠围着床期植物性神经与子宫局部细胞免疫的关系。选择180日龄,体重为300～350g的性成熟Wistar雌性大鼠90只,随机分为对照、假手术处理和手术处理(n=30)3组,手术处理为孕前切除支配子宫的植物性神经(肠系膜后神经节节后纤维和盆神经丛节前纤维),伤口愈合,开始合笼试验。在妊娠4～6d,无菌条件下,取出大鼠子宫和卵巢,观察排卵、胚胎着床情况变化,通过细胞染色和ELISA方法测定肥大细胞数量和组织胺释放量。结果表明:正常大鼠子宫中组织胺自发释放量和总含量在着床(d5)时最低。肥大细胞数量也呈现相似的变化。神经切除后,自发释放组织胺量在妊娠4～6d数值明显下降,且在妊娠4、6d与对照组相比较差异显著(P0.05);可释放组织胺总含量在着床前(d4)极显著降低(P0.01),且胚胎着床数量明显减少或延迟;肥大细胞数量在着床前后与组织胺总含量有相似的变化。这些结果说明,切除神经降低了着床前肥大细胞数量和组织胺水平,改变了子宫局部免疫水平,进而引起了胚胎着床减少或延迟。综上表明,支配子宫的植物性神经可在着床前上调子宫肥大细胞数量和组织胺水平,控制子宫局部免疫水平,在胚胎着床中起重要调控作用。 相似文献
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为研究妊娠早期子宫内交感神经对PCNA的调控效应,选取180~200日龄健康的性成熟Wistar雌性大鼠36只,随机分为对照组和处理组,处理组采用静脉注射6-OHDA损毁交感神经。采用免疫组化法和qRT-PCR法,观察和分析交感神经对妊娠早期大鼠子宫内膜组织学结构以及PCNA分布的影响。结果表明,PCNA阳性物质主要分布在固有层浅层的蜕膜细胞及肌层的外纵肌细胞核内存在。损毁交感神经后,子宫腺较正常的妊娠状态减少,腺上皮变薄,PCNA免疫阳性细胞减少,子宫内膜的蜕膜细胞及平滑肌细胞等的PCNA发生异常表达,特别是着床前的妊娠第4天(处理组)大鼠子宫腺数量减少,但腺上皮内PCNA免疫阳性细胞增强,子宫正常的组织学微环境被打乱,导致囊胚不能与子宫建立联系,出现着床数下降而排卵数基本正常的状况。免疫组化观察和mRNA相对表达量的统计分析均显示损毁支配子宫的交感神经后,导致子宫组织的蜕膜细胞及平滑肌细胞等的PCNA发生异常表达,打破了正常生理状态下子宫内膜发育与胚泡发育的同步性,影响妊娠早期的胚泡着床。 相似文献
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《中国兽医学报》2017,(2):291-296
为研究大鼠副交感神经对妊娠早期子宫内组织胺(HA)和血清白血病抑制因子(LIF)的影响,选取180~200日龄健康性成熟Wistar雌性大鼠20只,随机分为对照组和处理组,处理组采用腹腔注射阿托品阻断副交感神经,对照组腹腔注射0.9%生理盐水。结果表明:阿托品处理后妊娠5d子宫囊胚数量明显减少、囊胚发育延迟;妊娠6d虽然囊胚数量接近正常对照组数量,但胚胎凸起仍小于正常妊娠6d状态。子宫肥大细胞(MC)释放HA结果显示,阻断副交感神经激发MC释放的HA量显著高于正常状态,且与MC自发释放的HA变化趋势不同;正常对照组血清LIF含量的变化趋势是随着妊娠时间的增加而减少,而处理组出现相反的趋势。试验结果提示,在着床窗口期副交感神经通过对MC释放HA等介质调控子宫的生理功能,HA和LIF分泌规律紊乱对胚胎着床的影响更为显著,导致囊胚发育延迟,甚至丢失。 相似文献
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为了研究交感神经对妊娠的调控作用,给小鼠连续5 d腹腔注射交感神经化学损毁剂——6-OHDA(100 mg/kg),将交感神经化学性损毁,然后通过阴道涂片法和显微解剖的方法,对交感神经损毁后小鼠发情周期的变化、排卵的数量和妊娠发生后胚胎数量及大小进行了观察。结果表明:交感神经化学损毁后发情周期和排卵的数量没有明显的变化,但是胚胎的数量明显减少,小鼠胚胎数量在妊娠第7天比对照组同期减少了64.4%,在妊娠第9天比对照组同期减少了69.9%;对胚胎的大小进行测量时发现,交感神经损毁组在妊娠第7天与对照组同期相比,长径减小了0.51 mm,短径减小了0.56 mm;妊娠第9天时,交感神经损毁组与对照组同期相比,长径减小了0.37 mm,短径减小了0.47 mm,差异显著(P<0.05)。说明交感神经主要影响胚胎的早期发育,对发情周期和排卵没有明显的影响。 相似文献
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《中国兽医学报》2017,(7):1300-1308
为研究交感神经对妊娠早期子宫内DKK-1和Wnt-1的调控作用,选取180~200日龄健康的性成熟Wistar雌性大鼠,随机分为对照组和处理组,处理组采用静脉注射6-OHDA损毁交感神经,用免疫组化法和qRT-PCR法,观察和分析交感神经对妊娠早期大鼠子宫内膜的DKK-1和Wnt-1蛋白及mRNA相对表达量的影响。结果显示:6-OHDA损毁交感神经后,对卵巢排卵数无显著性影响,但子宫囊胚数量显著下降、囊胚发育延迟,导致子宫腔上皮和腺上皮细胞自分泌DKK-1和Wnt-1紊乱,呈现与正常状态相反的变化趋势。结果表明:在着床窗口期,交感神经通过影响DKK-1对Wnt-1信号分子的调控作用而影响囊胚着床、发育。 相似文献
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着床是指胚胎发育到胚泡阶段 ,与此同时子宫增殖和分化到可接受状态的同步化发育 ,并最后形成胎盘的过程。猪、马、牛、羊等都是表面着床 ,胚泡与子宫内膜只是表面接触 ,并未嵌入子宫内膜中。黄体产生的孕酮对于妊娠维持、子宫内膜接受态的建立以及着床后的妊娠维持都很重要。妊娠早期胚胎诱导母体的内分泌变化以维持卵巢黄体孕酮的持续分泌 ,这是母体对妊娠最早的生理反应 ,以使妊娠与正常的卵巢周期相区别 ,称为母体妊娠识别 ,它是着床起始必不可少的环节。最近证实 ,雌激素启动着床是通过诱导子宫上皮分泌细胞因子、生长因子以及粘蛋白等… 相似文献
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为了研究交感神经对小鼠妊娠早期(妊娠第1～9天)子宫内膜发育的影响,本试验采用交感神经阻断剂6-羟多巴胺(6-OHDA,100 mg·kg~(-1)体质量)腹腔注射成年雌性昆明小白鼠,损毁外周交感神经.利用放射免疫分析法、组织学和免疫组织化学技术,检测了小鼠妊娠早期血清17β-雌二醇水平、子宫腺发育和子宫内膜细胞增殖的变化.结果显示:(1)在妊娠第1天(E1)、E5和E7 6-OHDA处理组血清中17β-雌二醇的含量分别降低了63.4%(P<0.01)、35.7%(P<0.05)和25.5%(P<0.05),而在E3和E9分别升高了79.3%(P<0.05)和156.7%(P<0.01);(2)6-OHDA处理降低了妊娠早期子宫腺的比例,与同期对照组相比分别下降了37.5%、38.6%、41.8%、61.4%和58.1%(P<0.01);(3)6-OHDA处理降低了妊娠早期子宫内膜细胞的增殖,使E1、E3、E5、E7和E9子宫内膜增殖细胞分别减少了27.2%、30.2%、40.7%、27.2%和27.7%(P<0.01).上述结果表明,交感神经对雌激素的分泌以及妊娠早期子宫组织结构的重建具有重要的调控作用,进而调节动物早期胚胎的着床和发育. 相似文献
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选用成年雌性 Wistar大鼠 ,采用外科手术方法分别在妊娠前和妊娠后切断支配大鼠子宫的植物性神经 ,观察了切断神经对 Wistar大鼠着床的影响 ,并用常规组织学方法观察了子宫肥大细胞 ( MC)数的变化。结果表明 :( 1 )切断神经后再配种的大鼠不易怀孕 ,绝大部分鼠经交配 3次以上仍不怀孕 ,其他鼠推迟着床。对妊娠后大鼠切断神经并不影响妊娠的维持 ;( 2 )切断神经的大鼠子宫 MC总数与对照组相比有所增加 ,经 t检验未见显著差异 ,提示神经影响着床不完全是通过 MC数的改变起作用 ,可能通过改变 MC介质的释放起作用。本试验结果提示 ,支配子宫的植物性神经可能参与大鼠胚胎着床的建立 ,而对胚胎着床后影响并不重要 相似文献
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生殖周期小鼠细胞免疫功能的探讨──外周血T细胞和子宫肥大细胞的观察 总被引：7，自引：0，他引：7
本实验用甲苯胺蓝染色法和非特异性酯酶染色法，分别探讨了小鼠生殖周期中子宫肥大细胞和外周血Ｔ细胞的消长情况。结果发现，以间情期为基准，无论是子宫肥大细胞数量，还是外周血Ｔ细胞数量，在发情期明显降低，妊娠期维持较低水平，临产前反弹，分娩后１ｄ减少（与发情期相当），分娩后２～３ｄ恢复间情期水平。发情期、妊娠期肥大细胞和Ｔ细胞的减少，有利于附植、妊娠，也可能是精子和胎儿不被母体排斥的原因之一。临产前反弹，揭示分娩时母体对胎儿可能发生排斥反应。 相似文献
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Lei FAN Menghan SHA Wei LI Qingling KANG Jianli WU Suhua CHEN Nan YU 《The Journal of reproduction and development》2021,67(6):359
Immune imbalance of Treg/Th17 cells may contribute to recurrent implantation failure (RIF) during in vitro fertilization and embryo transfer (IVF-ET). In this study, we sought to determine the effect of intrauterine administration of mouse PBMCs prior to embryo implantation on endometrial receptivity and embryo implantation, and examine the underlying mechanism of Treg/Th17 cell balance following intrauterine administration of PBMCs. Pregnant mice were randomly divided into three groups: control group, embryo implantation dysfunction (EID) group, and EID with PBMCs group, and the number of embryo implantation sites was recorded during early pregnancy (Pd7.5). The balance of Treg/Th17 cells in the peripheral blood, spleen, and local implantation sites was detected during the peri-implantation period (Pd4.0) and early pregnancy (Pd7.5). The EID group demonstrated a significant decrease in the number of embryo implantation sites, while the EID with PBMCs group demonstrated higher number of embryo implantation sites compared to the EID group. The balance of Treg/Th17 cells in the peripheral blood and spleen tissues was not significantly different between the aforementioned groups. However, the local uterine ratio of the Treg/Th17 cells increased in the EID with PBMCs group compared to that in the EID group. Collectively, we found that intrauterine administration of PBMCs prior to embryo implantation effectively promotes embryo implantation rates. This may be attributed to the improvement in the local immune balance of Treg and Th17 cells compared with the overall immune balance. 相似文献
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中药成分小檗碱对小鼠2-细胞胚胎体外培养及移植效果的研究 总被引：3，自引：0，他引：3
以添加抗菌素的mCZB液为对照组,筛选比较了中药有效成分小檗碱不同浓度对小鼠2-细胞胚胎体外培养效果的影响,并计数所培养的孵化胚胎细胞数目,观察中药有效成分对胚胎细胞数目增殖的作用;通过将体外培养发育的囊胚进行移植,进一步验证其对小鼠胚胎移植效果和产仔发育的影响。结果表明:小檗碱最佳浓度为0.10μg/mL,120h孵化胚胎发育率和孵化胚胎细胞数目(89.9%,83.7±9.10)极显著高于对照组(50.7%,69.5±7.14)(P<0.01);小檗碱组培养囊胚移植妊娠率(66.7%)和离窝成活率(55.8%)均显著高于对照组(50.0%,45.2%)(P<0.05),其组间产仔率、初产仔鼠平均体重、离窝小鼠平均体重无显著差异(P>0.05)。其结果说明,小檗碱对体外胚胎生长发育和细胞增殖有促进作用,对胚胎附植及初生仔鼠无不良影响。 相似文献
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Variations of mast cell number, histamine concentration and oestrogen receptor (ER) expression in mammary glands with the fluctuation of plasma oestradiol level were identified either in the intact rats at different oestrous stages or in the ovary-ectomized rats administrated with different doses of oestradiol benzoate. The results showed that the number of mast cells and histamine concentration fluctuated concomitantly with plasma oestradiol level during the oestrous cycle. More mast cell number and higher histamine concentrations were observed in the oestrous stage than that in the prooestrous and dioestrous stages. Ovariectomy decreased the mast cell number and histamine concentration, which were reconstituted by exogenous oestradiol. ER was mainly found in the nuclear of epithelial cells and interstitial cells of mammary glands. In addition, ER was also expressed in the cytoplasm of some stromal cells. These stromal cells were verified to be mast cells. In conclusion, our results suggested that oestradiol modulated mast cell number and its degranulation in the mammary gland through the ERs pathway. 相似文献
15.
Terakawa J Wakitani S Sugiyama M Inoue N Ohmori Y Kiso Y Hosaka YZ Hondo E 《The Journal of reproduction and development》2011,57(6):700-707
Leukemia inhibitory factor (LIF) is essential for embryo implantation in mice and plays an important role in other mammals including humans. Intraperitoneal (i.p.) injections with anti-LIF antibody (7.5 μg/g body weight, 3 times) between D3 (D1 = day of vaginal plug detection) and D4 effectively blocked embryo implantation; complete inhibition was achieved in C57BL/6J mice, and implantation was dramatically reduced in ICR mice (reduced to 27%). Normal rabbit IgG used as the control did not disturb embryo implantation. Anti-LIF antibody was localized not only in the stroma, but also in the luminal epithelium and the glandular lumen after i.p. injections. Growth-arrested blastocysts were recovered from the uterus without any implantation sites in both strains. Blastocysts made contact with the LE on the antimesometrial side; however, uterine stromal cells did not undergo secondary decidual reaction, and the uterine lumen was open, even at D7. Several regions of decidualization in ICR mice treated with anti-LIF antibody were smaller than those of the control, and development of blastocysts was delayed. The expression of LIF-regulated genes, such as immune-responsive gene-1 and insulin-like growth factor binding protein-3, was significantly decreased in C57BL/6J mice treated with anti-LIF antibody compared with the control, but not in ICR mice. The present study demonstrated that simple ip injections of an antibody are sufficient to block one of the important factors involved in embryo implantation in mice, and this method should also be easily applicable to the investigation of other factors involved in implantation. 相似文献
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Ján BURKU? Martina KA?MAROVá Janka KUBANDOVá Natália KOKO?OVá Kamila FABIANOVá Du?an FABIAN Juraj KOPPEL ?tefan ?IKO? 《The Journal of reproduction and development》2015,61(4):325-331
We found retardation of preimplantation embryo growth after exposure to maternal restraint stress during the preimplantation period in our previous study. In the present study, we evaluated the impact of preimplantation maternal restraint stress on the distribution of inner cell mass (ICM) and trophectoderm (TE) cells in mouse blastocysts, and its possible effect on physiological development of offspring. We exposed spontaneously ovulating female mice to restraint stress for 30 min three times a day during the preimplantation period, and this treatment caused a significant increase in blood serum corticosterone concentration. Microscopic evaluation of embryos showed that restraint stress significantly decreased cell counts per blastocyst. Comparing the effect of restraint stress on the two blastocyst cell lineages, we found that the reduction in TE cells was more substantial than the reduction in ICM cells, which resulted in an increased ICM/TE ratio in blastocysts isolated
from stressed dams compared with controls. Restraint stress reduced the number of implantation sites in uteri, significantly delayed eye opening in delivered mice, and altered their behavior in terms of two parameters (scratching on the base of an open field test apparatus, time spent in central zone) as well. Moreover, prenatally stressed offspring had significantly lower body weights and in 5-week old females delivered from stressed dams, fat deposits were significantly lower. Our results indicate that exposure to stress during very early pregnancy can have a negative impact on embryonic development with consequences reaching into postnatal life. 相似文献
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丁酸钠对肉鸡小肠黏膜免疫相关细胞的影响 总被引：4，自引：0，他引：4
本试验通过日粮中添加丁酸钠研究其对肉鸡小肠黏膜免疫相关细胞的影响.将32只1日龄健康AA肉鸡随机分为4个处理组:A组(对照组:基础日粮)、B组(丁酸钠组:基础日粮 500mg/kg丁酸钠)、C组(丁酸钠 芽孢杆菌组:基础日粮 100 mg/kg丁酸钠 200 mg/kg芽孢杆菌)和D组(丁酸钠 酶制剂组:基础日粮 100 mg/kg丁酸钠 500 mg/kg酶制剂).试验7周后,采用组织学技术研究肉鸡小肠黏膜免疫相关细胞的分布变化.结果显示:(1)与对照组比较,小肠肥大细胞、上皮内淋巴细胞及杯状细胞的形态无明显变化,肥大细胞多存在于肠腺周围和肠绒毛固有层,(2)各试验组的小肠肥大细胞、上皮内淋巴细胞及杯状细胞数均显著高于对照组(P<0.05);(3)各试验组和对照组小肠肥大细胞和上皮内淋巴细胞数均从前向后逐渐减少,十二指肠的肥大细胞最多,空肠的次之,回肠的较少;杯状细胞数则与之相反.由此可知,3种添加剂可不同程度地改善肉鸡小肠黏膜结构,且将丁酸钠分别与芽孢杆菌和酶制剂混合饲喂,效果在一定程度上好于单独饲喂丁酸钠. 相似文献