A diurnal fluctuation in medial basal hypothalamic-preoptic area cytosol estrogen receptors in ovariectomized hamsters.
Cytosol estrogen receptors (CER) were measured in ovariectomized hamsters, kept in a light:dark schedule of 14:10. Significant diurnal fluctuations in CER occurred in medial basal hypothalamus-preoptic area, but not in amygdala, anterior pituitary or uterus. Highest levels of CER in medial basal hypothalamus-preoptic area occurred 2 h before lights went out, and lowest levels 1 h after lights went out.
D000818:Animals; D002940:Circadian Rhythm; D006224:Cricetinae; D003600:Cytosol / Q000378:metabolism*; D005260:Female; D008647:Mesocricetus; D010052:Ovariectomy; D010775:Photic Stimulation; D011301:Preoptic Area / Q000378:metabolism* / Q000502:physiology; D011960:Receptors, Estrogen / Q000502:physiology*; D013347:Subcellular Fractions / Q000378:metabolism; D013997:Time Factors
D011960:Receptors, Estrogen