Linked Life Data

8990265

Source:http://linkedlifedata.com/resource/pubmed/id/8990265

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1997-2-5
pubmed:abstractText
A spontaneous dwarf rat derived from a colony of Sprague-Dawley (SD) strain has no detectable level of growth hormone (GH) in pituitary, although it contained other hormones like prolactin and ACTH. Hepatic profile of cytochrome P450 (P450) differed clearly between dwarf and normal SD rats. A male-specific form of P450, CYP2C11, was detected in dwarf male rat livers, while the level was one-third of the normal SD livers. This P450 was also detected in dwarf females. Other male-specific CYP3A2 and CYP3A18 were also contained in both sexes of dwarf rats, whereas a female-specific form, CYP2C12, was not detectable in dwarf females. Phenobarbital-inducible CYP2B1 and CYP2B2 were constitutively expressed in dwarf rats, although substantially absent in normal SD rats. To assess the role of GH on hepatic P450 expression, GH was given to dwarf rats for 7 to 9 days. The intermittent injection (mimicking the male secretory pattern) resulted in the elevation of CYP2C11 to a level as observed in normal SD males. Continuous infusion of GH (mimicking the female secretory pattern) evoked CYP2C12 in livers of both sexes of dwarf rats, whereas the treatment decreased levels of CYP3A2, CYP3A18, and CYP2B1. These results clearly demonstrate that specific defect of GH, but not pituitary, cause the clear changes in hepatic P450 forms including sex-specific forms. The present study provides evidence further to strengthen the principal role of GH on the regulation of expression of P450 in rat livers.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0003-9861
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
337
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
34-42
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
A specific loss of growth hormone abolished sex-dependent expression of hepatic cytochrome P450 in dwarf rats: reversal of the profiles by growth hormone-treatment.
pubmed:affiliation
Division of Drug Metabolism and Molecular Toxicology, Faculty of Pharmaceutical Sciences, Tohoku University, Sendai, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't