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Non-classical mechanisms of steroid sensing in the ovary: lessons from the bovine oxytocin model

Ivell, Richard; Dai, Yanzhenzi; Mann, Navdeep; Anand-Ivell, Ravinder


Richard Ivell

Yanzhenzi Dai

Navdeep Mann


Steroidogenic tissues such as the ovary, testes or adrenal glands are paradoxical in that they often indicate actions of steroid hormones within a dynamic range of ligand concentration in a high nanomolar or even micromolar level, i.e. at the natural concentrations existing within those organs. Yet ligand-activated nuclear steroid receptors act classically by direct interaction with DNA in the picomolar or low nanomolar range. Moreover, global genomic studies suggest that less than 40% of steroid-regulated genes involve classical responsive elements in gene promoter regions. The bovine oxytocin gene is a key element in the maternal recognition of pregnancy in ruminants and is regulated via an SF1 site in its proximal promoter. This gene is also regulated by steroids acting in a non-classical manner, involving nuclear receptors which do not interact directly with DNA. Dose-response relationships for these actions are in the high nanomolar range. Similar ‘steroid sensing’ mechanisms may prevail for other SF1-regulated genes and predict alternative pathways by which environmental endocrine disruptors might influence the functioning of steroid-producing organs and hence indirectly the steroid-dependent control of physiology and development.

Journal Article Type Article
Publication Date Jan 25, 2014
Journal Molecular and Cellular Endocrinology
Print ISSN 0303-7207
Electronic ISSN 1872-8057
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 382
Issue 1
APA6 Citation Ivell, R., Dai, Y., Mann, N., & Anand-Ivell, R. (2014). Non-classical mechanisms of steroid sensing in the ovary: lessons from the bovine oxytocin model. Molecular and Cellular Endocrinology, 382(1), doi:10.1016/j.mce.2013.04.016
Keywords Oxytocin ; Non-classical steroid signaling ;Oxytocin receptor ; Estrogen receptor-alpha ; Estrogen receptor-beta ;Bovine ovary
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Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf