Expression and localization of aquaporin 1 and 3 in human fetal membranes

被引:88
作者
Mann, SE
Ricke, EA
Yang, BA
Verkman, AS
Taylor, RN
机构
[1] Univ Calif San Francisco, Sch Med, Dept Obstet Gynecol & Reprod Sci, San Francisco, CA 94143 USA
[2] Univ Calif San Francisco, Sch Med, Dept Med, San Francisco, CA 94143 USA
关键词
amnion; chorion; intramembranous pathway; aquaporin; 1; 3;
D O I
10.1067/mob.2002.127168
中图分类号
R71 [妇产科学];
学科分类号
100211 [妇产科学];
摘要
OBJECTIVES: Aquaporins are a family of water-selective channels that facilitate fluid movement across cell membranes. Specifically, aquaporin 1 (AQP1) and aquaporin 3 (AQP3) have been found to be important in osmotic water movement across membranes. Our goal in this study was (1) to determine whether AQP1 or AQP3 messenger RNA are expressed in the chorioamniotic membrane and. if present, (2) to determine the precise membrane location of these aquaporins. STUDY DESIGN: Placentas were collected from women with intact membranes not in labor who underwent elective cesarean sections at term (37-40 weeks). The membranes (amnion and chorion) directly overlying the placenta were sampled as well as the free-floating reflected membranes. RNA and protein were isolated from the amnion and chorion. Reverse transcriptase-polymerase chain reaction. Western analysis, and immunohistochemistry were used to determine expression and localization of AQP1 and AQP3. RESULTS: AQP1 messenger RNA was found in amnion and chorion from both membrane locations. Western analysis also yielded positive results for amnion and chorion from both locations, Immunohistochemical localization of AQP1 showed it to be present on the apical aspect of the chorionic plate amnion. AQP3 protein was not found in the fetal membranes. CONCLUSIONS: AQP1 is present in the fetal membranes. AQP1 may play a role in water movement from the amniotic cavity across the placenta into the fetal circulation. Further studies are needed to clarify our understanding of the role of fetal membrane aquaporins in amniotic fluid homeostasis.
引用
收藏
页码:902 / 907
页数:6
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