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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
4
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pubmed:dateCreated |
1995-4-25
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pubmed:abstractText |
The effects of insulin to stimulate metabolic and mitogenic responses were examined in Rat 1 fibroblast cells that overexpressed either normal (HIRc) or kinase-deficient human insulin receptors. When studied at the optimal growth stage for each cell line, insulin-stimulated responses measured in cells containing kinase-defective receptors with a Lys1018-Ala1018 substitution in the ATP-binding site of the kinase domain (A/K1018). Maximal insulin responsiveness for all these effects, measured as fold-increase over basal, was comparable in parental and HIRc cells (1.8- to 2.4-fold increases). Relative insulin responsiveness for all effects was greatest in A/K 1018 cells. One clone (AK-I) expressing a similar number of kinase-inactive receptors as in the HIRc cells displayed maximal responsiveness of 3.6- to 5.5-fold increases. A second A/K cell line containing 1/10 the number of kinase-inactive receptors displayed responsiveness intermediate between AK-I and parental or HIRc cells (1.5- to 4.8-fold increases). Both clones of kinase-deficient A/K1018 cells displayed impaired insulin sensitivity compared with HIRc cells. These findings suggest that expression of insulin receptor kinase activity is a determinant of insulin sensitivity but not necessarily of the final biological responsiveness of cells to insulin.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
AIM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/DNA,
http://linkedlifedata.com/resource/pubmed/chemical/Deoxyglucose,
http://linkedlifedata.com/resource/pubmed/chemical/Glucose,
http://linkedlifedata.com/resource/pubmed/chemical/Glycogen Synthase,
http://linkedlifedata.com/resource/pubmed/chemical/Insulin,
http://linkedlifedata.com/resource/pubmed/chemical/Insulin-Like Growth Factor I,
http://linkedlifedata.com/resource/pubmed/chemical/Phosphotyrosine,
http://linkedlifedata.com/resource/pubmed/chemical/Receptor, Insulin,
http://linkedlifedata.com/resource/pubmed/chemical/Tyrosine
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pubmed:status |
MEDLINE
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pubmed:month |
Apr
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pubmed:issn |
0013-7227
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
136
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
1459-67
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pubmed:dateRevised |
2011-11-17
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pubmed:meshHeading |
pubmed-meshheading:7534700-Animals,
pubmed-meshheading:7534700-Biological Transport,
pubmed-meshheading:7534700-Cell Line,
pubmed-meshheading:7534700-DNA,
pubmed-meshheading:7534700-Deoxyglucose,
pubmed-meshheading:7534700-Embryo, Mammalian,
pubmed-meshheading:7534700-Enzyme Activation,
pubmed-meshheading:7534700-Fibroblasts,
pubmed-meshheading:7534700-Glucose,
pubmed-meshheading:7534700-Glycogen Synthase,
pubmed-meshheading:7534700-Humans,
pubmed-meshheading:7534700-Insulin,
pubmed-meshheading:7534700-Insulin-Like Growth Factor I,
pubmed-meshheading:7534700-Phosphotyrosine,
pubmed-meshheading:7534700-Rats,
pubmed-meshheading:7534700-Receptor, Insulin,
pubmed-meshheading:7534700-Tyrosine
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pubmed:year |
1995
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pubmed:articleTitle |
Rat fibroblast cells overexpressing kinase-inactive human insulin receptors are insulin responsive: influence of growth conditions.
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pubmed:affiliation |
Department of Biochemistry, National University of Singapore, Kent Ridge.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't
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