共查询到19条相似文献,搜索用时 234 毫秒
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MicroRNA(miRNA)作为重要的后转录调节因子参与多种生理活动。孕酮(Progesterone,P4)是重要的甾类激素,通过结合特异性受体——孕酮受体(Progesterone receptors , PGR)发挥生理作用。PGR作为核受体超家族的一员参与调控生殖相关组织或非生殖相关组织的功能。P4/PGR和miRNA可单独在雌性生殖中发挥调控作用。然而,在雌性生殖过程中,miRNA和P4/PGR的相互作用对调控排卵等雌性生殖活动起到非常重要的作用,但作用机制还未阐明。本文综述了miRNA调节P4产生、PGR基因表达以及P4/PGR调节miRNA表达的可能作用方式,为更好地研究miRNA和P4/PGR在雌性生殖中的作用提供理论基础。 相似文献
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磷脂酶A2、环氧合酶以及前列腺素E合成酶是前列腺素E合成途径中顺序起作用的重要酶类,其中前列腺素E合成酶有两种不同的亚型,分别介导不同的前列腺素E合成反应。前列腺素E可与其受体特异性结合,并通过旁分泌和自分泌两种形式调节细胞反应,参与多种生理过程。近来研究发现,前列腺素E受体不仅存于质膜,而在核膜上也大量存在。前列腺素E核受体介导的信号转导途径与膜受体介导的信号途径不同,对于基因转录的调控机制也不同。本文综述并探讨了上述分子所组成的网络系统在哺乳动物生殖,尤其是雌性生殖过程中所发挥的重要作用。 相似文献
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芳香烃受体及芳香烃基因串在氧化应激和细胞凋亡中的作用 总被引:2,自引:0,他引:2
杨桂香 《国外医学:分子生物学分册》2001,23(5):292-295
目前已发现至少有6个受芳香烃受体(aryl hydrocarbon receptor,AHR)调控的下游靶基因,这6个基因统称为芳香烃基因串,芳香烃基因串在哺乳动物细胞的表达产物能通过互相对话,调节细胞氧化应激反应和细胞凋亡过程,是芳香烃受体介导芳香烃化合物产生多种生物效应的分子机理。 相似文献
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《中国细胞生物学学报》2017,(9)
雌激素受体(estrogen receptor,ER)属于核受体超家族成员,主要通过与雌激素结合的方式诱导下游靶基因转录,从而发挥其重要的生物学功能。在此过程中,ER招募一系列辅调节因子参与其介导的基因转录调控。ER不仅在促进性器官成熟、副性征发育及维持性功能中起重要作用,在多种性激素受体相关癌症的发生发展中也扮演着重要角色。其中,甲状腺癌的发生女性比男性更普遍,是一种有性别倾向的肿瘤,并与性激素受体功能有相关性。研究证实,ER辅调节因子通过参与ER下游靶基因的转录调控,在雌激素受体相关肿瘤中发挥不可或缺的作用,另外,各种环境刺激和细胞活动也参与了ER对肿瘤的调控。该文主要对近年来雌激素受体在甲状腺癌中的作用及机制进行综述,试图为甲状腺癌的治疗和预防提供新思路和新靶点。 相似文献
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《生命科学》2016,(11)
雄激素受体(androgen receptor,AR)是核受体超家族中的成员,主要以雄激素依赖的方式诱导下游靶基因转录。在此过程中,AR招募辅调节因子参与调控下游靶基因转录,从而发挥其生物学功能。近年研究证实,AR在肝细胞肝癌(hepatocellular carcinoma,HCC)发生发展中发挥重要作用。一方面,AR介导的下游靶基因(TGF-β1、VEGF、CCRK等)的异常表达影响HCC细胞的生长、增殖、血管形成等进程。乙肝病毒HBV X蛋白通过激活c-Src激酶等途径上调AR的转录活性,从而促进HCC的发展。另一方面,还有研究证实,AR可抑制HCC细胞的转移。现主要综述AR介导的基因转录调控在HCC中作用的分子机制,这将为HCC的早期发现及治疗提供理论依据和新的思路。 相似文献
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Martinez S Grandy R Pasten P Montecinos H Montecino M Olate J Hinrichs MV 《Journal of cellular biochemistry》2006,99(3):853-859
Xenopus laevis oocyte maturation is induced by the steroid hormone progesterone through a non-genomic mechanism initiated at the cell membrane. Recently, two Xenopus oocyte progesterone receptors have been cloned; one is the classical progesterone receptor (xPR-1) involved in genomic actions and the other a putative seven-transmembrane-G-protein-couple receptor. Both receptors are postulated to be mediating the steroid-induced maturation process in the frog oocyte. In this study, we tested the hypothesis that the classical progesterone receptor, associated to the oocyte plasma membrane, is participating in the reinitiation of the cell cycle. Addition of a myristoilation and palmytoilation signal at the amino terminus of xPR-1 (mp xPR-1), increased the amount of receptor associated to the oocyte plasma membrane and most importantly, significantly potentiated progesterone-induced oocyte maturation sensitivity. These findings suggest that the classical xPR-1, located at the plasma membrane, is mediating through a non-genomic mechanism, the reinitiation of the meiotic cell cycle in the X. laevis oocyte. 相似文献
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雌激素的非基因组途径在哺乳动物雌性生殖过程中的作用机制 总被引:1,自引:0,他引:1
雌激素的非基因组调节模式在雌性生殖系统中广泛存在.雌激素通过基因组、非基因组及两种调节模式的整合在不同组织中行使多种生理功能.卵巢中雌激素能通过非基因组效应对卵细胞起到保护作用.子宫中雌激素对多种基因的表达都是通过非基因组模式.对雌激素非基因组效应的研究将有利于进一步了解雌激素的作用机制. 相似文献
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Progesterone is an endogenous immunomodulator, and can suppress T-cell activation during pregnancy. When analyzed under a genome time scale, the classic steroid receptor pathway does not have any effect on ion fluxes. Therefore, the aim of this study was to investigate whether the non-genomic effects on ion fluxes by progesterone could immunosuppress phytohemagglutinin (PHA)-induced human peripheral T-cell activation. The new findings indicated that, first, only progesterone stimulated both [Ca2+]i elevation and pHi decrease; in contrast, estradiol or testosterone stimulated [Ca2+]i elevation and hydrocortisone or dexamethasone stimulated pHi decrease. Secondly, the [Ca2+]i increase by progesterone was dependent on Ca2+ influx, and the acidification was blocked by Na+/H+ exchange (NHE) inhibitor, 3-methylsulphonyl-4-piperidinobenzoyl, guanidine hydrochloride (HOE-694) but not by 5-(N,N-dimethyl)-amiloride (DMA). Thirdly, progesterone blocked phorbol 12-myristate 13-acetate (PMA) or PHA-induced alkalinization, but PHA did not prevent progesterone-induced acidification. Fourthly, progesterone did not induce T-cell proliferation; however, co-stimulation progesterone with PHA was able to suppress PHA-induced IL-2 or IL-4 secretion and proliferation. When progesterone was applied 72 h after PHA stimulation, progesterone could suppress PHA-induced T-cell proliferation. Finally, immobilization of progesterone by conjugation to a large carrier molecule (BSA) also stimulated a rapid [Ca2+]i elevation, pHi decrease, and suppressed PHA-induced proliferation. These results suggested that the non-genomic effects of progesterone, especially acidification, are exerted via plasma membrane sites and suppress the genomic responses to PHA. Progesterone might act directly through membrane specific nonclassical steroid receptors to cause immunomodulation and suppression of T-cell activation during pregnancy. 相似文献