dc.contributor.author | Bernard, Jeffrey Richard | en |
dc.contributor.author | Herr, Henry James | en |
dc.contributor.author | Limon, Jose J. | en |
dc.contributor.author | Reeder, Donald W. | en |
dc.contributor.author | Rivas, Donato A. | en |
dc.date.accessioned | 2018-07-17T00:03:00Z | |
dc.date.available | 2018-07-17T00:03:00Z | |
dc.date.issued | 2005 | en |
dc.identifier.citation | The Journal of Physiology 565(2), 627-636. (2005) | en |
dc.identifier.issn | 0022-3751 | en |
dc.identifier.uri | http://hdl.handle.net/10211.3/204846 | en |
dc.description.abstract | Several recent reports using cell lines have suggested that both Akt and atypical protein kinase C (aPKC) ζ/λ are translocated to the plasma membrane (PM) in response to insulin. However, it has yet to be determined in skeletal muscle whether: (1) insulin increases PM‐associated Akt2, aPKC ζ and/or λ protein concentration, (2) the activity of these kinases is altered by insulin at the PM, and (3) high fat feeding alters the insulin‐stimulated PM concentration and/or activity of Akt2 and aPKC ζ/λ. Sprague‐Dawley rats were randomly assigned to either normal (n= 16) or high fat (n= 16) dietary groups. Following a 12 week dietary period, animals were subjected to hind limb perfusions in the presence (n= 8 per group) or absence (n= 8 per group) of insulin. In normal skeletal muscle, total PI3‐kinase, Akt2 and aPKC ζ/λ activities were increased by insulin. PM‐associated aPKC ζ and λ, and aPKC ζ/λ activity, but not Akt2 or Akt2 activity, were increased by insulin in normal muscle. High fat feeding did not alter total skeletal muscle Akt2, aPKC ζ or aPKC λ protein concentration. Insulin‐stimulated total PI3‐kinase, Akt2 and aPKC ζ/λ activities were reduced in the high fat fed animals. Insulin‐stimulated PM aPKC ζ, aPKC λ, aPKC ζ/λ activity and GLUT4 protein concentration were also reduced in high fat fed animals. These findings suggest that in skeletal muscle, insulin stimulates translocation of aPKC ζ and λ, but not Akt2, to the PM. In addition, high fat feeding impairs insulin‐stimulated activation of total aPKC ζ/λ and Akt2, as well as PM association and activation of aPKC ζ and λ. | en |
dc.format.extent | 10 pages | en |
dc.language.iso | en | en |
dc.publisher | Wiley | en |
dc.publisher | Physciological Society | en |
dc.relation.uri | doi.org/10.1113/jphysiol.2005.086694 | en |
dc.subject | Adipose Tissue | en |
dc.subject | Animals | en |
dc.subject | Cell Membrane | en |
dc.subject | Dietary Fats | en |
dc.subject | Epididymis | en |
dc.subject | Glucose | en |
dc.subject | Glucose Transporter Type 4 | en |
dc.subject | Hypoglycemic Agents | en |
dc.subject | Insulin | en |
dc.subject | Insulin Receptor Substrate Proteins | en |
dc.subject | Isoenzymes | en |
dc.subject | Male | en |
dc.subject | Monosaccharide Transport Proteins | en |
dc.subject | Muscle Proteins | en |
dc.subject | Muscle | en |
dc.subject | Skeletal | en |
dc.subject | Phosphatidylinositol 3-Kinases | en |
dc.subject | Phosphoproteins | en |
dc.subject | Protein Kinase C | en |
dc.subject | Protein-Serine-Threonine Kinases | en |
dc.subject | Proto-Oncogene Proteins | en |
dc.subject | Proto-Oncogene Proteins c-akt | en |
dc.subject | Rats | en |
dc.subject | Rats | en |
dc.subject | Sprague-Dawley | en |
dc.subject | Dietary Fats | en |
dc.subject | Glucose Transporter Type 4 | en |
dc.subject | Hypoglycemic Agents | en |
dc.subject | Insulin | en |
dc.subject | Insulin Rece | en |
dc.title | Insulin" stimulated plasma membrane association and activation of Akt2, aPKC ζ and aPKC λ in high fat fed rodent skeletal muscle | en |
dc.type | Article | en |
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