HOP/NECC1, A Novel Regulator of Mouse Trophoblast Differentiation

Homeodomain-only protein/not expressed in choriocarcinoma clone 1 (HOP/NECC1) is a newly identified gene that modifies the expression of cardiac-specific genes and thereby regulates heart development. More recently, HOP/NECC1 was reported to be a suppressor of choriocarcinogenesis. Here, we examined...

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Veröffentlicht in:The Journal of biological chemistry 2007-08, Vol.282 (33), p.24065-24074
Hauptverfasser: Asanoma, Kazuo, Kato, Hidenori, Yamaguchi, Shinichiro, Shin, Chong Hyun, Liu, Zhi-Ping, Kato, Kiyoko, Inoue, Takafumi, Miyanari, Yoko, Yoshikawa, Koji, Sonoda, Kenzo, Fukushima, Kotaro, Wake, Norio
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container_end_page 24074
container_issue 33
container_start_page 24065
container_title The Journal of biological chemistry
container_volume 282
creator Asanoma, Kazuo
Kato, Hidenori
Yamaguchi, Shinichiro
Shin, Chong Hyun
Liu, Zhi-Ping
Kato, Kiyoko
Inoue, Takafumi
Miyanari, Yoko
Yoshikawa, Koji
Sonoda, Kenzo
Fukushima, Kotaro
Wake, Norio
description Homeodomain-only protein/not expressed in choriocarcinoma clone 1 (HOP/NECC1) is a newly identified gene that modifies the expression of cardiac-specific genes and thereby regulates heart development. More recently, HOP/NECC1 was reported to be a suppressor of choriocarcinogenesis. Here, we examined the temporal expression profile of HOP/NECC1 in wild-type mouse placenta. We found that E8.5–E9.5 wild-type placenta expressed HOP/NECC1 in the giant cell and spongiotrophoblast layers. HOP/NECC1 (-/-) placenta exhibited marked propagation of giant cell layers and, in turn reduction of spongiotrophoblast formation. We demonstrated SRF transcriptional activity increased in the differentiating trophoblasts and forced expression of SRF in a trophoblast stem (TS) cell line induces the differentiation into giant cells. Negative regulation of SRF (serum response factor) by the binding of HOP/NECC1 protein contributed at least in part to the generation of these placental defects. Gradual induction of HOP/NECC1 in response to differentiation stimuli may result in the decision to differentiate into a particular type of trophoblastic cell lineage and result in non-lethal defects shown by the HOP/NECC1 (-/-) placentas.
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subjects Animals
Cell Differentiation
Cell Lineage
Female
Gene Expression Profiling
Genotype
Homeodomain Proteins - genetics
Homeodomain Proteins - physiology
Humans
Mice
Mice, Knockout
Mice, Transgenic
Time Factors
Trophoblasts - cytology
Tumor Suppressor Proteins - genetics
Tumor Suppressor Proteins - physiology
title HOP/NECC1, A Novel Regulator of Mouse Trophoblast Differentiation
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