Biomaterial Database

Human growth hormone (hGH)-(44-191), a reportedly diabetogenic fragment of hGH, circulates in human blood: measurement by radioimmunoassay. 1994

Y N Sinha, and B P Jacobsen

Department of Biochemistry and Clinical Physiology, Whittier Institute for Diabetes and Endocrinology, La Jolla, California 92037.

The purpose of these experiments was to determine whether a 17-kilodalton (K) fragment of human GH (hGH), hGH-(44-191), a peptide 10 times more potent than intact hGH in causing glucose intolerance in an animal model, circulates in human blood. Analysis of pituitary extracts and sera by Western blotting revealed the presence of a 17K hGH-immunoreactive band in both samples. Monoclonal antibodies to recombinant hGH-(44-191) cross-reacted with the 17K hGH-immunoreactive band of the pituitary. A RIA specific for hGH-(44-191) was developed using recombinant hGH-(44-191) as the tracer and standard, and a mouse anti-hGH-(44-191) serum as the source of antibody. The RIA detected hGH-(44-191) in human sera and pituitary extracts. The concentration of hGH-(44-191) in pituitary glands was 1/100th to 1/500th of the hGH concentration, but in serum its concentration averaged 1-2 times higher than that of hGH. Serum hGH-(44-191) concentrations were higher in pregnant than in nonpregnant women. The data document the existence of hGH-(44-191) in human pituitary gland and serum, and provide initial evidence that it may be physiologically produced. As its concentration is affected by the physiological state of the individual, it may play a role in the expression of the physiological and pathological actions of hGH.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008807	Mice, Inbred BALB C	An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research.	BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D010446	Peptide Fragments	Partial proteins formed by partial hydrolysis of complete proteins or generated through PROTEIN ENGINEERING techniques.	Peptide Fragment,Fragment, Peptide,Fragments, Peptide
D010902	Pituitary Gland	A small, unpaired gland situated in the SELLA TURCICA. It is connected to the HYPOTHALAMUS by a short stalk which is called the INFUNDIBULUM.	Hypophysis,Hypothalamus, Infundibular,Infundibular Stalk,Infundibular Stem,Infundibulum (Hypophysis),Infundibulum, Hypophyseal,Pituitary Stalk,Hypophyseal Infundibulum,Hypophyseal Stalk,Hypophysis Cerebri,Infundibulum,Cerebri, Hypophysis,Cerebrus, Hypophysis,Gland, Pituitary,Glands, Pituitary,Hypophyseal Stalks,Hypophyses,Hypophysis Cerebrus,Infundibular Hypothalamus,Infundibular Stalks,Infundibulums,Pituitary Glands,Pituitary Stalks,Stalk, Hypophyseal,Stalk, Infundibular,Stalks, Hypophyseal,Stalks, Infundibular
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
D011487	Protein Conformation	The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).	Conformation, Protein,Conformations, Protein,Protein Conformations
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
D011994	Recombinant Proteins	Proteins prepared by recombinant DNA technology.	Biosynthetic Protein,Biosynthetic Proteins,DNA Recombinant Proteins,Recombinant Protein,Proteins, Biosynthetic,Proteins, Recombinant DNA,DNA Proteins, Recombinant,Protein, Biosynthetic,Protein, Recombinant,Proteins, DNA Recombinant,Proteins, Recombinant,Recombinant DNA Proteins,Recombinant Proteins, DNA
D003429	Cross Reactions	Serological reactions in which an antiserum against one antigen reacts with a non-identical but closely related antigen.	Cross Reaction,Reaction, Cross,Reactions, Cross
D005260	Female		Females