Relative roles of the epithelial and stromal tissue compartment(s) in mediating the actions of relaxin and estrogen on cell proliferation and apoptosis in the mouse lower reproductive tract.

Relative roles of the epithelial and stromal tissue compartment(s) in mediating the actions of relaxin and estrogen on cell proliferation and apoptosis in the mouse lower reproductive tract.
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上皮和基质组织区室在介导松弛素和雌激素对小鼠下生殖道细胞增殖和凋亡的作用中的相对作用。

DOI:
10.1111/j.1749-6632.2008.03799.x
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发表时间:
2009
影响因子:
5.2
通讯作者:
Sherwood,ODavid
Sherwood,ODavid
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Yao,Lijuan;Agoulnik,AlexanderI;Cooke,PaulS;Meling,DarylD;Sherwood,ODavid

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松弛素和雌激素在大鼠和小鼠妊娠后半期由卵巢分泌。松弛素促进显着增长的下生殖道在这两个物种。松弛素通过刺激细胞增殖和抑制细胞凋亡促进宫颈和阴道上皮和基质细胞的积累。雌激素通过雌激素受体α(ERα)发挥作用,在松弛素的作用中起着重要的许可作用。了解松弛素和雌激素作用的一个基本步骤是确定启动其作用的组织隔室。使用针对人松弛素受体(LGR 7,RXFP 1)的抗体或LGR 7基因中的IRES-LacZ报告盒的有限研究揭示了上皮下基质细胞和平滑肌细胞中的松弛素受体,但在啮齿动物阴道和/或宫颈组织中的上皮细胞中没有。ERα在啮齿类动物生殖道的间质和上皮细胞中均有表达。本章描述了正在进行的研究,使用松弛素生物活性作为一种手段,确定组织室(S),启动松弛素和雌激素的行动,对下生殖道。具体而言,最初使用与LGR 7敲除小鼠组合的组织分离-重组方法来获得功能证据,即基质LGR 7对于促进小鼠子宫颈和阴道中的基质细胞和上皮细胞的增殖和抑制细胞凋亡是必要的和足够的。组织分离-重组方法目前正与ERα基因敲除小鼠联合使用,以确定雌激素对松弛素诱导的细胞增殖的强制性允许作用是否通过间质和/或上皮ERα发生。
Relaxin and estrogen are secreted by the ovary during the second half of pregnancy in rats and mice. Relaxin promotes marked growth of the lower reproductive tract in both species. Relaxin promotes accumulation of epithelial and stromal cells in the cervix and vagina by both stimulating cell proliferation and inhibiting apoptosis. Estrogen acting through estrogen receptor alpha (ERα) plays an essential permissive role in relaxin's actions. A fundamental step toward understanding the actions of relaxin and estrogen is to identify the tissue compartments that initiate their effects. Limited studies using either antibodies to human relaxin receptor (LGR7, RXFP1) or an IRES‐LacZ reporter cassette in the LGR7 gene revealed relaxin receptors in subepithelial stroma cells and smooth muscle cells but not in epithelial cells in rodent vaginal and/or cervical tissues. ERα has been reported in both stromal and epithelial compartments in the rodent reproductive tract. This chapter describes ongoing studies that use relaxin bioactivity as a means of identifying the tissue compartment(s) that initiates the actions of relaxin and estrogen on the lower reproductive tract. Specifically, a tissue separation–recombination methodology in combination with LGR7 knockout mice was initially used to obtain functional evidence that stromal LGR7 is both necessary and sufficient to promote proliferation and inhibit apoptosis in both stromal and epithelial cells in mouse cervix and vagina. The tissue separation–recombination method is currently being used in conjunction with ERα knockout mice to determine if the obligatory permissive effect of estrogen on relaxin‐induced cell proliferation occurs through stromal and/or epithelial ERα.
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发表时间: 1973-01-01
影响因子: --
作者:
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期刊: Journal of experimental psychology. Learning, memory, and cognition
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