人早孕期绒毛组织和滋养细胞趋化因子受体转录水平

Transcription of chemokine receptors in villi and trophoblasts of human first trimes-ter gestation

目的:研究早孕期绒毛组织及滋养细胞18种趋化因子受体的转录水平,以揭示趋化因子受体在母-胎界面生理性调节作用。方法:提取人早孕期绒毛组织及滋养细胞总RNA,半定量RT-PCR检测绒毛组织和滋养细胞18种趋化因子受体mRNA的表达水平。结果:CXCR4及CXCR6在绒毛组织中普遍高表达;CCR6、CCR7、XCR1及CX3CR1呈普遍中等表达;CCR1-CCR5、CCR8-CCR10、CXCR1-CXCR3在部分绒毛组织中表达,部分绒毛组织不表达或表达量很低;早孕人绒毛组织不表达CXCR5。早孕期滋养细胞表达CCR1、CCR3-CCR5、CCR8-CCR9、CXCR1-CXCR4、CXCR6、XCR1、CX3CR1;不表达CCR2、CCR6、CCR7、CCR10及CXCR5。结论:早孕期绒毛组织及滋养细胞表达多种趋化因子受体,它们在正常妊娠中具有重要的生理学意义。

Objective: To investigate the mRNA expression of chemokine receptors in human villi and trophoblasts of first trimester gestation . Methods: The authors first obtained villous tissues from fifteen women who had undergone selective termination at 5 - 10 weeks of normal gestation. Total RNA was then extracted, using the TRIzol reagent, from villous tissues or Percoll-gradient purified trophoblasts. Consequently, the expressions of chemokine receptors in villous tissues and trophoblasts were investigated by way of semi-quantitative reverse transcriptase-polymerase chain reaction.Results: The chemokine receptors, CXCR4 and CXCR6, were highly expressed in each villous tissue, while the CCR6, CCR7, XCR1 and CX3CR1 were moderately expressed in villi. The chemokine receptors, CCR1- CCR5, CCR8 - CCR10, CXCR1 -CXCR3, were expressed only in some villous samples, while no CXCR5 mRNA was found in any villous tissue. The authors also found that the freshly isolated and Percoll-purified trophoblasts expressed CCR1, CCR3 - CCR5, CCR8 - CCR9, CXCR1 - CXCR4, CXCR6, XCR1 and CX3CR1 mRNA. Conclusion: A variety of chemokine receptors were expressed in villous tissues and trophoblasts of human first trimester gestation, hence, these receptors may play an important biological role at the materno-fetal interface in normal human pregnancy.