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Multiple connexins participate in preimplantation mouse development.

机译:多种连接蛋白参与植入前小鼠的发育。

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摘要

This study attempted to identify connexins present in preimplantation mouse embryos. Transcripts for Cx30.3, Cx31, Cx31.1, Cx40, Cx43, and Cx45 were detected by RT-PCR in the blastocyst. These connexins are transcribed after fertilization, and show differences in onset of accumulation. Cx31, Cx43, and Cx45 accumulate continuously from the 2- to 4-cell stage while Cx30.3, Cx31, and Cx40 accumulate beginning in the 8-cell stage. All six mRNAs were found to cosediment with polyribosomes, indicating they are translated. Immunocytochemistry detected Cx31.1, Cx40, Cx43, and Cx45 in pre- and post-compaction embryos. Cx31.1 was detected in gap junctions in 8-cell embryos and morulae, while Cx31.1, Cx43 and Cx45 were detected in gap junctions of compacted morulae. Only Cx31.1 and Cx43 were detected in blastocyst gap junctions with Cx40 and Cx45 remaining localized in the cytoplasm. Expression of multiple connexin genes during early embryogenesis raises new questions about their functional significance in preimplantation development.
机译:这项研究试图确定存在于植入前小鼠胚胎中的连接蛋白。通过RT-PCR在胚泡中检测到Cx30.3,Cx31,Cx31.1,Cx40,Cx43和Cx45的转录本。这些连接蛋白在受精后被转录,并显示出积累开始的差异。 Cx31,Cx43和Cx45从2单元阶段到4单元阶段持续累积,而Cx30.3,Cx31和​​Cx40从8单元阶段开始累积。发现所有六个mRNA与多核糖体共沉淀,表明它们已被翻译。免疫细胞化学检测了致密化前后胚胎中的Cx31.1,Cx40,Cx43和Cx45。在8细胞胚胎和桑ula的间隙连接中检测到Cx31.1,而在紧密桑的间隙连接中检测到Cx31.1,Cx43和Cx45。在胚泡间隙连接中仅检测到Cx31.1和Cx43,而Cx40和Cx45仍位于细胞质中。在胚胎早期发育过程中多种连接蛋白基因的表达提出了有关其在植入前发育中的功能意义的新问题。

著录项

  • 作者

    Davies, Tyler Cameron.;

  • 作者单位

    The University of Western Ontario (Canada).;

  • 授予单位 The University of Western Ontario (Canada).;
  • 学科 Biology Animal Physiology.;Health Sciences Human Development.
  • 学位 M.Sc.
  • 年度 1996
  • 页码 139 p.
  • 总页数 139
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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