Marked developmental changes in heme oxygenase-1 (HO-1) expression in the mouse placenta: Correlation between HO-1 expression and placental development

被引:38
作者
Watanabe, S
Akagi, R
Mori, M
Tsuchiya, T
Sassa, S
机构
[1] Okayama Prefectural Univ, Fac Hlth & Welfare Sci, Soja, Okayama 7191197, Japan
[2] Okayama Univ, Okayama 7008530, Japan
[3] Rockefeller Univ, New York, NY 10021 USA
关键词
D O I
10.1016/j.placenta.2003.10.012
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Heme catabolism during embryonic period is not well understood. It has been Suggested that placental heme oxygenase (HO)-1, which is an inducible isoform of the rate-limiting enzyme in the heme degradation pathway, may be involved in supporting normal fetal development. In this study, we examined the distribution of HO-1 protein in the developing mouse embryo, as well as developmental changes of ho-1 gene expression, and the enzyme activity of HO and biliverdin IXalpha reductase (BVR-A) in placenta. Ectoplacental cone in embryonic day (E) 6.5 embryo already showed HO-1 protein expression, which became restricted only to trophoblastic cells after placenta formation was completed on day E14-5. The placenta of E13.5-E14.5 embryos expressed high levels of HO-1 mRNA, which was decreased significantly towards the end of pregnancy. However, HO-1 expression in placenta was significantly T higher than uterus throughout the gestational period. In contrast to HO-1, the placental level of BVR-A activity remained JOINT and did not show changes throughout the gestational period. The correlation between HO-1 expression and placental development suggests that HO-1 might be essential for normal embryonic development. (C) 2003 Elsevier Ltd. All rights reserved.
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页码:387 / 395
页数:9
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