title: Expression of the estrogen-related receptor 1 (ERR-1) orphan receptor during mouse development.
abstract: We studied the expression of the estrogen-related receptor 1 (ERR-1) during mouse embryonic development. ERR-1 is expressed at very early stages in ES cells and at E8.5 in the mesodermal cells of the visceral yolk sac. ERR-1 continues to be expressed later in mesodermal tissues and particularly in heart and in skeletal muscles. This expression persists during all the embryonic development and in adult stage. ERR-1 transcripts level increases during muscle differentiation. Accordingly, we show that ERR-1 expression increases during the myoblast to myotube transition in differentiating C2 myoblastic cells. ERR-1 has also been detected in the nervous system during embryonic development. At E10.5, a high level of ERR-1 transcripts can be observed in differentiated cells of the intermediate zone of the spinal cord which also suggests a role of ERR-1 in the differentiation of the nervous system. The same is observed in the telencephalon vesicules at E13.5. Later, at E15.5 and E17.5, expression persists in the spinal cord but decreases dramatically in the central nervous system. Moreover, ERR-1 expression increases during skin formation and is detected in the stratum spinosum which contains differentiated Malpighian cells. Finally, we also observed ERR-1 in endodermal derivatives such as the epithelium of intestine and urogenital system. The DNA target of ERR-1 has been identified to be the SF-1/FTZ-F1 responsive element (SFRE) and we show in this paper that SF-1/FTZ-F1 and ERR-1 bind to and activate transcription independently through the SFRE element. Our study suggests that ERR-1 may be implicated in numerous physiological or developmental functions, particularly in the muscle, the central and peripheral nervous system and the epidermis. Interestingly, in these various systems ERR-1 expression is correlated with post-mitotic cells stage, suggesting that ERR-1 may play a role in the differentiation process.
authors.affiliation: CNRS UMR 319, Mécanismes du développement et de la cancérisation, Institut de Biologie de Lille, France.
authors.forename: E
authors.initials: E
authors.lastname: Bonnelye
authors.forename: J M
authors.initials: JM
authors.lastname: Vanacker
authors.forename: N
authors.initials: N
authors.lastname: Spruyt
authors.forename: S
authors.initials: S
authors.lastname: Alric
authors.forename: B
authors.initials: B
authors.lastname: Fournier
authors.forename: X
authors.initials: X
authors.lastname: Desbiens
authors.forename: V
authors.initials: V
authors.lastname: Laudet
mesh_terms: D000818:Animals; D005314:Embryonic and Fetal Development; D005260:Female; D018507:Gene Expression Regulation, Developmental; D017403:In Situ Hybridization; D051379:Mice; D011247:Pregnancy; D012333:RNA, Messenger / Q000032:analysis / Q000096:biosynthesis; D018160:Receptors, Cytoplasmic and Nuclear / Q000096:biosynthesis* / Q000235:genetics*; D011960:Receptors, Estrogen / Q000096:biosynthesis* / Q000235:genetics*; D000097983:ERRalpha Estrogen-Related Receptor
chemical_list: D012333:RNA, Messenger; D018160:Receptors, Cytoplasmic and Nuclear; D011960:Receptors, Estrogen; D000097983:ERRalpha Estrogen-Related Receptor