Biomaterial Database

[Validation of the radioimmunoassay for rat luteinizing hormone (LH) (author's transl)]. 1980

A M Aranda Iriarte

A rat LH radioimmunoassay (RIA) using the immunoreactants provided by Dr Parlow on behalf of the Rat Pituitary Hormone Program of the NIAMDD of the NIH is described. The instructions suggested by the NIH have been modified in order to reach a higher sensitivity. It is possible to use prepipetted frozen standards and the same labelled antigen over a period of 1 month, or longer, after labelling, provided the preparation is purified immediately prior to its use. These procedures, as well as the addition of antibody and buffer simultaneously, shorten considerably the time spent on a given RIA and decrease the inter- and intra-assay variability. The specificity of the method is also described. There is good parallelism between the standard curve and serial dilutions of plasmas and hypophyses of rats. The RIA was validated physiologically by LH determination on plasmas obtained from animals submitted to different experimental situations in which a decrease (hypophysectomy) or increase (ovariectomy, LH-RH treatment, etc.) of this hormone is expected.

UI	MeSH Term	Description	Entries
D007016	Hypophysectomy	Surgical removal or destruction of the hypophysis, or pituitary gland. (Dorland, 28th ed)	Hypophysectomies
D007986	Luteinizing Hormone	A major gonadotropin secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR). Luteinizing hormone regulates steroid production by the interstitial cells of the TESTIS and the OVARY. The preovulatory LUTEINIZING HORMONE surge in females induces OVULATION, and subsequent LUTEINIZATION of the follicle. LUTEINIZING HORMONE consists of two noncovalently linked subunits, alpha and beta. Within a species, the alpha subunit is common in the three pituitary glycoprotein hormones (TSH, LH and FSH), but the beta subunit is unique and confers its biological specificity.	ICSH (Interstitial Cell Stimulating Hormone),Interstitial Cell-Stimulating Hormone,LH (Luteinizing Hormone),Lutropin,Luteoziman,Luteozyman,Hormone, Interstitial Cell-Stimulating,Hormone, Luteinizing,Interstitial Cell Stimulating Hormone
D010053	Ovary	The reproductive organ (GONADS) in female animals. In vertebrates, the ovary contains two functional parts: the OVARIAN FOLLICLE for the production of female germ cells (OOGENESIS); and the endocrine cells (GRANULOSA CELLS; THECA CELLS; and LUTEAL CELLS) for the production of ESTROGENS and PROGESTERONE.	Ovaries
D011863	Radioimmunoassay	Classic quantitative assay for detection of antigen-antibody reactions using a radioactively labeled substance (radioligand) either directly or indirectly to measure the binding of the unlabeled substance to a specific antibody or other receptor system. Non-immunogenic substances (e.g., haptens) can be measured if coupled to larger carrier proteins (e.g., bovine gamma-globulin or human serum albumin) capable of inducing antibody formation.	Radioimmunoassays
D002369	Castration	Surgical removal or artificial destruction of gonads.	Gonadectomy,Castrations,Gonadectomies
D004348	Drug Labeling	Use of written, printed, or graphic materials upon or accompanying a drug container or wrapper. It includes contents, indications, effects, dosages, routes, methods, frequency and duration of administration, warnings, hazards, contraindications, side effects, precautions, and other relevant information.	Labeling, Drug,Package Inserts, Drug,Product Labeling, Drug,Black Box Warning,Boxed Warning,Drug Labelling,Black Box Warnings,Box Warning, Black,Box Warnings, Black,Boxed Warnings,Drug Package Insert,Drug Package Inserts,Drug Product Labeling,Insert, Drug Package,Inserts, Drug Package,Labeling, Drug Product,Labelling, Drug,Package Insert, Drug,Warning, Black Box,Warning, Boxed,Warnings, Black Box,Warnings, Boxed
D005260	Female		Females
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
D051381	Rats	The common name for the genus Rattus.	Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus