Biomaterial Database

Human chorionic gonadotrophin and subunits--heterogeneity in serum of male patients with tumours of the genital tract. 1985

R J Norman, and C Lowings, and T Oliver, and T Chard

The pattern of secretion of human chorionic gonadotrophin (hCG) and its subunits in male subjects with tumours of the genital tract was examined by gel filtration, radioimmunoassay, immunoradiometric assay, bioassay and binding to Concanavalin A. The predominant form of hCG was the intact molecule but all patients had increased levels of free beta subunit. The intact hCG was active in a mouse Leydig cell bioassay and was normally glycosylated. High concentrations of free alpha subunit were not found and the ratio of alpha subunit: beta subunit was less than that in normal pregnancy. It is concluded that hCG-secreting tumours of the male genital tract are similar to choriocarcinoma in the female in that large quantities of intact hormone are produced with a disproportionate increase in free beta sub-unit.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D010446	Peptide Fragments	Partial proteins formed by partial hydrolysis of complete proteins or generated through PROTEIN ENGINEERING techniques.	Peptide Fragment,Fragment, Peptide,Fragments, Peptide
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
D011485	Protein Binding	The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.	Plasma Protein Binding Capacity,Binding, Protein
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
D002850	Chromatography, Gel	Chromatography on non-ionic gels without regard to the mechanism of solute discrimination.	Chromatography, Exclusion,Chromatography, Gel Permeation,Chromatography, Molecular Sieve,Gel Filtration,Gel Filtration Chromatography,Chromatography, Size Exclusion,Exclusion Chromatography,Gel Chromatography,Gel Permeation Chromatography,Molecular Sieve Chromatography,Chromatography, Gel Filtration,Exclusion Chromatography, Size,Filtration Chromatography, Gel,Filtration, Gel,Sieve Chromatography, Molecular,Size Exclusion Chromatography
D003208	Concanavalin A	A MANNOSE/GLUCOSE binding lectin isolated from the jack bean (Canavalia ensiformis). It is a potent mitogen used to stimulate cell proliferation in lymphocytes, primarily T-lymphocyte, cultures.
D005260	Female		Females
D005834	Genital Neoplasms, Male	Tumor or cancer of the MALE GENITALIA.	Male Genital Neoplasms,Neoplasms, Male Genital,Genital Neoplasm, Male,Male Genital Neoplasm,Neoplasm, Male Genital