Biomaterial Database

Diurnal variation in the inducibility of luteal 20 alpha-hydroxysteroid dehydrogenase in pregnant rats. 1980

D Hickman-Smith, and N J Kuhn

Luteolysis was induced in rats during late pregnancy by fetoplacental removal, and was monitored by the increased activity of luteal 20 alpha-hydroxysteroid dehydrogenase (20 alpha-OHSDH). The extent of enzyme induction over a given length of time varied according to the time of day at which the fetuses and placentae were removed, 11.00 and 21.00 h appearing to give optimal and minimal enzyme activities respectively. The 20 alpha-OHSDH was more readily induced on day 19 than on day 18.

UI	MeSH Term	Description	Entries
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D011270	Pregnancy, Animal	The process of bearing developing young (EMBRYOS or FETUSES) in utero in non-human mammals, beginning from FERTILIZATION to BIRTH.	Animal Pregnancies,Animal Pregnancy,Pregnancies, Animal
D002940	Circadian Rhythm	The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs or environmental and physiological stimuli.	Diurnal Rhythm,Nyctohemeral Rhythm,Twenty-Four Hour Rhythm,Nycthemeral Rhythm,Circadian Rhythms,Diurnal Rhythms,Nycthemeral Rhythms,Nyctohemeral Rhythms,Rhythm, Circadian,Rhythm, Diurnal,Rhythm, Nycthemeral,Rhythm, Nyctohemeral,Rhythm, Twenty-Four Hour,Rhythms, Circadian,Rhythms, Diurnal,Rhythms, Nycthemeral,Rhythms, Nyctohemeral,Rhythms, Twenty-Four Hour,Twenty Four Hour Rhythm,Twenty-Four Hour Rhythms
D003338	Corpus Luteum	The yellow body derived from the ruptured OVARIAN FOLLICLE after OVULATION. The process of corpus luteum formation, LUTEINIZATION, is regulated by LUTEINIZING HORMONE.	Corpora Lutea,Lutea, Corpora
D003341	Luteolysis	Degradation of CORPUS LUTEUM. In the absence of pregnancy and diminishing trophic hormones, the corpus luteum undergoes luteolysis which is characterized by the involution and cessation of its endocrine function.	Corpus Luteum Regression,Luteal Regression,Regression, Corpus Luteum,Regression, Luteal
D004790	Enzyme Induction	An increase in the rate of synthesis of an enzyme due to the presence of an inducer which acts to derepress the gene responsible for enzyme synthesis.	Induction, Enzyme
D005260	Female		Females
D000028	Abortion, Induced	Intentional removal of a fetus from the uterus by any of a number of techniques. (POPLINE, 1978)	Embryotomy,Abortion (Induced),Abortion Failure,Abortion History,Abortion Rate,Abortion Technics,Abortion Techniques,Abortion, Drug-Induced,Abortion, Rivanol,Abortion, Saline-Solution,Abortion, Soap-Solution,Anti-Abortion Groups,Fertility Control, Postconception,Induced Abortion,Previous Abortion,Abortion Failures,Abortion Histories,Abortion Rates,Abortion Technic,Abortion Technique,Abortion, Drug Induced,Abortion, Previous,Abortion, Saline Solution,Abortion, Soap Solution,Abortions (Induced),Abortions, Drug-Induced,Abortions, Induced,Abortions, Previous,Abortions, Rivanol,Abortions, Saline-Solution,Abortions, Soap-Solution,Anti Abortion Groups,Anti-Abortion Group,Drug-Induced Abortion,Drug-Induced Abortions,Embryotomies,Failure, Abortion,Failures, Abortion,Group, Anti-Abortion,Groups, Anti-Abortion,Histories, Abortion,History, Abortion,Induced Abortions,Postconception Fertility Control,Previous Abortions,Rate, Abortion,Rates, Abortion,Rivanol Abortion,Rivanol Abortions,Saline-Solution Abortion,Saline-Solution Abortions,Soap-Solution Abortion,Soap-Solution Abortions,Technic, Abortion,Technics, Abortion,Technique, Abortion,Techniques, Abortion
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D015089	20-Hydroxysteroid Dehydrogenases	A group of enzymes that catalyze the reversible reduction-oxidation reaction of 20-hydroxysteroids, such as from a 20-ketosteroid to a 20-alpha-hydroxysteroid (EC 1.1.1.149) or to a 20-beta-hydroxysteroid (EC 1.1.1.53).	20 Hydroxysteroid Dehydrogenases,Dehydrogenases, 20 Hydroxysteroid,Dehydrogenases, 20-Hydroxysteroid,Hydroxysteroid Dehydrogenases, 20