Ontogeny of the rat hepatic adrenoceptors
Abstract
Hepatic alpha-1, alpha-2, and beta-2 adrenoceptors were characterized during development of the rat through Scatchard analysis of (/sup 3/H)-prazosin, (/sup 3/H)-rauwolscine and (/sup 125/I)-pindolol binding to washed particle membrane preparations. Major changes in adrenoceptor number occur shortly before birth and at weaning. The fetal rat liver is characterized by a large number of alpha-2 adrenoceptors which falls 10-20 fold at birth. The number of hepatic beta adrenoceptors decreases 30-50% during the third week after birth increases slightly at weaning, then decreases gradually in the adult. Hepatic alpha-1 adrenoceptor number increases 3-5 fold at weaning to become the predominant adrenoceptor in the adult rat liver. The basis for the fall in alpha-2 number at birth remains unclear. The fall in beta receptor number at the end of the second week post-natally appears dependent on increased insulin and corticosterone secretion as well as increased NE release form nerve terminals. The basis for the increase in beta number at weaning and the sex-dependent loss of beta function but not receptor number in the adult rat remains unknown. The dramatic increases in alpha-1 number and function at weaning are dependent on increased adrenocortical secretion, adrenalectomy prevents the normal. This effect of adrenocorticoids might bemore »
- Authors:
- Publication Date:
- Research Org.:
- Duke Univ., Durham, NC (USA)
- OSTI Identifier:
- 6703837
- Resource Type:
- Thesis/Dissertation
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; ADRENAL HORMONES; RECEPTORS; FETAL MEMBRANES; CELL DIFFERENTIATION; BIOCHEMICAL REACTION KINETICS; CELL MEMBRANES; FETUSES; GLYCOGEN; IODINE 125; LABELLED COMPOUNDS; LIVER; RADIORECEPTOR ASSAY; RATS; TRITIUM COMPOUNDS; ANIMALS; BETA DECAY RADIOISOTOPES; BODY; CARBOHYDRATES; CELL CONSTITUENTS; DAYS LIVING RADIOISOTOPES; DIGESTIVE SYSTEM; ELECTRON CAPTURE RADIOISOTOPES; GLANDS; HORMONES; INTERMEDIATE MASS NUCLEI; IODINE ISOTOPES; ISOTOPE APPLICATIONS; ISOTOPES; KINETICS; MAMMALS; MEMBRANE PROTEINS; MEMBRANES; NUCLEI; ODD-EVEN NUCLEI; ORGANIC COMPOUNDS; ORGANS; POLYSACCHARIDES; PROTEINS; RADIOISOTOPES; REACTION KINETICS; RODENTS; SACCHARIDES; STEROID HORMONES; TRACER TECHNIQUES; VERTEBRATES; 550301* - Cytology- Tracer Techniques
Citation Formats
McMillian, M K. Ontogeny of the rat hepatic adrenoceptors. United States: N. p., 1985.
Web.
McMillian, M K. Ontogeny of the rat hepatic adrenoceptors. United States.
McMillian, M K. 1985.
"Ontogeny of the rat hepatic adrenoceptors". United States.
@article{osti_6703837,
title = {Ontogeny of the rat hepatic adrenoceptors},
author = {McMillian, M K},
abstractNote = {Hepatic alpha-1, alpha-2, and beta-2 adrenoceptors were characterized during development of the rat through Scatchard analysis of (/sup 3/H)-prazosin, (/sup 3/H)-rauwolscine and (/sup 125/I)-pindolol binding to washed particle membrane preparations. Major changes in adrenoceptor number occur shortly before birth and at weaning. The fetal rat liver is characterized by a large number of alpha-2 adrenoceptors which falls 10-20 fold at birth. The number of hepatic beta adrenoceptors decreases 30-50% during the third week after birth increases slightly at weaning, then decreases gradually in the adult. Hepatic alpha-1 adrenoceptor number increases 3-5 fold at weaning to become the predominant adrenoceptor in the adult rat liver. The basis for the fall in alpha-2 number at birth remains unclear. The fall in beta receptor number at the end of the second week post-natally appears dependent on increased insulin and corticosterone secretion as well as increased NE release form nerve terminals. The basis for the increase in beta number at weaning and the sex-dependent loss of beta function but not receptor number in the adult rat remains unknown. The dramatic increases in alpha-1 number and function at weaning are dependent on increased adrenocortical secretion, adrenalectomy prevents the normal. This effect of adrenocorticoids might be mediated through glycogen, as glycogen depletion during fasting decreases alpha-1 receptor number and function at weaning are dependent on increased adrenocortical secretion, adrenalectomy prevents the normal. This effect of adrenocorticoids might be mediated through glycogen, as glycogen depletion during fasting decreases alpha-1 receptor number and function. These findings suggest that hepatic adrenoceptor number adapts from the low carbohydrate diet of the suckling rat to the high carbohydrate diet of the adult at weaning.},
doi = {},
url = {https://www.osti.gov/biblio/6703837},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1985},
month = {Tue Jan 01 00:00:00 EST 1985}
}