Biomaterial Database

Experience with a radioimmunoassay of luteinizing hormone-releasing hormone (LH-RH) in biological material of man. 1979

W Patschew, and W Rohde, and G Dörner

A radioimmunoassay of LH-RH with a sensitivity of 7.8 pg/ml is described. Labelling and purification techniques, methods for extraction of LH-RH and separation techniques of bound and free labelled hormone are compared. Determination of LH-RH levels in serum after administration of synthetic LH-RH by different routes and measurements of endogenous LH-RH levels in serum of normal subjects and patients with different endocrine diseases as well as in cerebrospinal fluid of normal men are performed. The measurement of exogenously administered LH-RH in serum reflects the disappearance of synthetic LH-RH from peripheral circulation in dependence upon the kind of administration route. The level of endogenous LH-RH was found to be under the limit of the assay in all samples of cerebrospinal fluid and of serum of normal male subjects. The results obtained in the patient groups show that the radioimmunological estimation of endogenous LH-RH in peripheral body fluids does not reflect the hypophysiotrophic role of this hypothalamic peptide.

UI	MeSH Term	Description	Entries
D007006	Hypogonadism	Condition resulting from deficient gonadal functions, such as GAMETOGENESIS and the production of GONADAL STEROID HORMONES. It is characterized by delay in GROWTH, germ cell maturation, and development of secondary sex characteristics. Hypogonadism can be due to a deficiency of GONADOTROPINS (hypogonadotropic hypogonadism) or due to primary gonadal failure (hypergonadotropic hypogonadism).	Hypergonadotropic Hypogonadism,Hypogonadism, Isolated Hypogonadotropic,Hypogonadotropic Hypogonadism,Hypogonadism, Hypergonadotropic,Hypogonadism, Hypogonadotropic
D007018	Hypopituitarism	Diminution or cessation of secretion of one or more hormones from the anterior pituitary gland (including LH; FOLLICLE STIMULATING HORMONE; SOMATOTROPIN; and CORTICOTROPIN). This may result from surgical or radiation ablation, non-secretory PITUITARY NEOPLASMS, metastatic tumors, infarction, PITUITARY APOPLEXY, infiltrative or granulomatous processes, and other conditions.	Adenohypophyseal Hyposecretion,Anterior Pituitary Hyposecretion Syndrome,Sheehan Syndrome,Simmonds Disease,Hyposecretion Syndrome, Anterior Pituitary,Hyposecretion, Adenohypophyseal,Pituitary Insufficiency,Postpartum Hypopituitarism,Postpartum Panhypopituitarism,Postpartum Pituitary Insufficiency,Sheehan's Syndrome,Simmonds' Disease,Disease, Simmonds,Hypopituitarism, Postpartum,Insufficiency, Pituitary,Panhypopituitarism, Postpartum,Pituitary Insufficiency, Postpartum,Sheehans Syndrome,Simmond's Disease,Syndrome, Sheehan,Syndrome, Sheehan's
D007457	Iodine Radioisotopes	Unstable isotopes of iodine that decay or disintegrate emitting radiation. I atoms with atomic weights 117-139, except I 127, are radioactive iodine isotopes.	Radioisotopes, Iodine
D007553	Isotope Labeling	Techniques for labeling a substance with a stable or radioactive isotope. It is not used for articles involving labeled substances unless the methods of labeling are substantively discussed. Tracers that may be labeled include chemical substances, cells, or microorganisms.	Isotope Labeling, Stable,Isotope-Coded Affinity Tagging,Isotopically-Coded Affinity Tagging,Affinity Tagging, Isotope-Coded,Affinity Tagging, Isotopically-Coded,Isotope Coded Affinity Tagging,Labeling, Isotope,Labeling, Stable Isotope,Stable Isotope Labeling,Tagging, Isotope-Coded Affinity,Tagging, Isotopically-Coded Affinity
D007987	Gonadotropin-Releasing Hormone	A decapeptide that stimulates the synthesis and secretion of both pituitary gonadotropins, LUTEINIZING HORMONE and FOLLICLE STIMULATING HORMONE. GnRH is produced by neurons in the septum PREOPTIC AREA of the HYPOTHALAMUS and released into the pituitary portal blood, leading to stimulation of GONADOTROPHS in the ANTERIOR PITUITARY GLAND.	FSH-Releasing Hormone,GnRH,Gonadoliberin,Gonadorelin,LH-FSH Releasing Hormone,LHRH,Luliberin,Luteinizing Hormone-Releasing Hormone,Cystorelin,Dirigestran,Factrel,Gn-RH,Gonadorelin Acetate,Gonadorelin Hydrochloride,Kryptocur,LFRH,LH-RH,LH-Releasing Hormone,LHFSH Releasing Hormone,LHFSHRH,FSH Releasing Hormone,Gonadotropin Releasing Hormone,LH FSH Releasing Hormone,LH Releasing Hormone,Luteinizing Hormone Releasing Hormone,Releasing Hormone, LHFSH
D008297	Male		Males
D011629	Puberty, Precocious	Development of SEXUAL MATURATION in boys and girls at a chronological age that is 2.5 standard deviations below the mean age at onset of PUBERTY in the population. This early maturation of the hypothalamic-pituitary-gonadal axis results in sexual precocity, elevated serum levels of GONADOTROPINS and GONADAL STEROID HORMONES such as ESTRADIOL and TESTOSTERONE.	Familial Precocious Puberty,Idiopathic Sexual Precocity,Precocious Puberty,Precocious Puberty, Central,Precocious Puberty, Male Limited,Precocious Puberty, Male-Limited,Pubertas Praecox,Sexual Precocity,Testotoxicosis,Central Precocious Puberties,Central Precocious Puberty,Familial Precocious Puberties,Idiopathic Sexual Precocities,Male-Limited Precocious Puberties,Male-Limited Precocious Puberty,Praecox, Pubertas,Precocious Puberties,Precocious Puberties, Central,Precocious Puberties, Familial,Precocious Puberties, Male-Limited,Precocious Puberty, Familial,Precocities, Idiopathic Sexual,Precocities, Sexual,Precocity, Idiopathic Sexual,Precocity, Sexual,Puberties, Central Precocious,Puberties, Familial Precocious,Puberties, Male-Limited Precocious,Puberties, Precocious,Puberty, Central Precocious,Puberty, Familial Precocious,Puberty, Male-Limited Precocious,Sexual Precocities,Sexual Precocities, Idiopathic,Sexual Precocity, Idiopathic
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
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D005260	Female		Females