Linked Life Data

2257247

Source:http://linkedlifedata.com/resource/pubmed/id/2257247

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1991-1-29
pubmed:abstractText
The hepatic tissue of the male rat exhibits a gradual decline and ultimate loss in androgen responsiveness during in vivo aging. Appearance of the age-associated androgen insensitivity can be delayed by dietary calorie restriction, an effective means for life-span extension. The androgen receptor mRNA is detectable in the liver only in its androgen-responsive state. Pubertal appearance of hepatic androgen sensitivity is remarkably correlated with the concomitant appearance of a cytoplasmic androgen binding (CAB) protein. Androgen resistance during senescence is associated with the loss of hepatic CAB activity as well. We are investigating the molecular basis for the temporal modulation of this hormone sensitivity through studies on the differential expression of two androgen-responsive marker genes. These are the androgen-repressible SMP-2, and the androgen-inducible alpha 2u-globulin. Androgen resistance of hepatocytes during aging results in repression of the alpha 2u-globulin gene, and derepression of the SMP-2 gene. The structural organizations for both of these genes have been characterized. The role of nuclear transcription factors (androgen receptor and any other transacting factor(s) which may be involved) in the coordinate regulation of alpha 2u-globulin and SMP-2 during aging and nutritional manipulation is being explored to establish the molecular mechanism of andropause in the liver.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0960-0760
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
37
pubmed:geneSymbol
SMP-2
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
437-45
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Changes in hepatic androgen sensitivity and gene expression during aging.
pubmed:affiliation
Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio 78284.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't