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J Biol Chem, Vol. 275, Issue 12, 8456-8460, March 24, 2000
Mechanism of Insulin Resistance in A-ZIP/F-1 Fatless Mice*
Jason K.
Kim §,
Oksana
Gavrilova¶,
Yan
Chen ,
Marc L.
Reitman¶, and
Gerald I.
Shulman
From the Howard Hughes Medical Institute and the
Department of Internal Medicine, Yale University School of Medicine,
New Haven, Connecticut 06536 and the ¶ Diabetes Branch, NIDDK,
National Institutes of Health, Bethesda, Maryland 20892
Insulin resistance is a major factor in the
pathogenesis of type 2 diabetes and may be related to alterations in
fat metabolism. Fatless mice have been created using dominant-negative
protein (A-ZIP/F-1) targeted gene expression in the adipocyte and shown to develop diabetes. To understand the mechanism responsible for the
insulin resistance in these mice, we conducted
hyperinsulinemic-euglycemic clamps in awake fatless and wild type
littermates before the development of diabetes and examined insulin
action and signaling in muscle and liver. We found the fatless mice to
be severely insulin-resistant, which could be attributed to defects in
insulin action in muscle and liver. Both of these abnormalities were
associated with defects in insulin activation of insulin receptor
substrate-1 and -2-associated phosphatidylinositol 3-kinase activity
and a 2-fold increase in muscle and liver triglyceride content. We also
show that upon transplantation of fat tissue into these mice,
triglyceride content in muscle and liver returned to normal as does
insulin signaling and action. In conclusion, these results suggest that
the development of insulin resistance in type 2 diabetes may be due to
alterations in the partitioning of fat between the adipocyte and
muscle/liver leading to accumulation of triglyceride in the latter
tissues with subsequent impairment of insulin signaling and action.
*
This study was supported by United States Public Health
Service Grants R01 DK-40936 and P30 DK-45735.The costs of publication of this
article were defrayed in part by the
payment of page charges. The article
must therefore be hereby marked
"advertisement" in accordance with 18 U.S.C. Section
1734 solely to indicate this fact.
§
Research associate of the Howard Hughes Medical Institute.
Investigator of the Howard Hughes Medical Institute. To whom
correspondence should be addressed: Howard Hughes Medical Institute, Yale University School of Medicine, Boyer Center for Molecular Medicine, 295 Congress Ave., BCMM 254C, Box 9812, New Haven, CT 06536-8012. Tel.: 203-737-1115; Fax: 203-737-4059; E-mail: gerald. shulman{at}yale.edu.
Copyright © 2000 by The American Society for Biochemistry and Molecular Biology, Inc.

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A. Seppala-Lindroos, S. Vehkavaara, A.-M. Hakkinen, T. Goto, J. Westerbacka, A. Sovijarvi, J. Halavaara, and H. Yki-Jarvinen
Fat Accumulation in the Liver Is Associated with Defects in Insulin Suppression of Glucose Production and Serum Free Fatty Acids Independent of Obesity in Normal Men
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M. Haluzik, K. R. Dietz, J. K. Kim, B. Marcus-Samuels, G. I. Shulman, O. Gavrilova, and M. L. Reitman
Adrenalectomy Improves Diabetes in A-ZIP/F-1 Lipoatrophic Mice by Increasing Both Liver and Muscle Insulin Sensitivity
Diabetes,
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J. G. Geisler, W. Zawalich, K. Zawalich, J. R.T. Lakey, H. Stukenbrok, A. J. Milici, and W. C. Soeller
Estrogen Can Prevent or Reverse Obesity and Diabetes in Mice Expressing Human Islet Amyloid Polypeptide
Diabetes,
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C. J. Chou, M. Haluzik, C. Gregory, K. R. Dietz, C. Vinson, O. Gavrilova, and M. L. Reitman
WY14,643, a Peroxisome Proliferator-activated Receptor alpha (PPARalpha ) Agonist, Improves Hepatic and Muscle Steatosis and Reverses Insulin Resistance in Lipoatrophic A-ZIP/F-1 Mice
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A. S. Attele, Y.-P. Zhou, J.-T. Xie, J. A. Wu, L. Zhang, L. Dey, W. Pugh, P. A. Rue, K. S. Polonsky, and C.-S. Yuan
Antidiabetic Effects of Panax ginseng Berry Extract and the Identification of an Effective Component
Diabetes,
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[Abstract]
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G. F. Lewis, A. Carpentier, K. Adeli, and A. Giacca
Disordered Fat Storage and Mobilization in the Pathogenesis of Insulin Resistance and Type 2 Diabetes
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A. B. Mayerson, R. S. Hundal, S. Dufour, V. Lebon, D. Befroy, G. W. Cline, S. Enocksson, S. E. Inzucchi, G. I. Shulman, and K. F. Petersen
The Effects of Rosiglitazone on Insulin Sensitivity, Lipolysis, and Hepatic and Skeletal Muscle Triglyceride Content in Patients With Type 2 Diabetes
Diabetes,
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P. J. Voshol, M. C. Jong, V. E.H. Dahlmans, D. Kratky, S. Levak-Frank, R. Zechner, J. A. Romijn, and L. M. Havekes
In Muscle-Specific Lipoprotein Lipase-Overexpressing Mice, Muscle Triglyceride Content Is Increased Without Inhibition of Insulin-Stimulated Whole-Body and Muscle-Specific Glucose Uptake
Diabetes,
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A. Virkamaki, E. Korsheninnikova, A. Seppala-Lindroos, S. Vehkavaara, T. Goto, J. Halavaara, A.-M. Hakkinen, and H. Yki-Jarvinen
Intramyocellular Lipid Is Associated With Resistance to In Vivo Insulin Actions on Glucose Uptake, Antilipolysis, and Early Insulin Signaling Pathways in Human Skeletal Muscle
Diabetes,
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H. Cho, J. Mu, J. K. Kim, J. L. Thorvaldsen, Q. Chu, E. B. Crenshaw III, K. H. Kaestner, M. S. Bartolomei, G. I. Shulman, and M. J. Birnbaum
Insulin Resistance and a Diabetes Mellitus-Like Syndrome in Mice Lacking the Protein Kinase Akt2 (PKBbeta )
Science,
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K. Ebihara, Y. Ogawa, H. Masuzaki, M. Shintani, F. Miyanaga, M. Aizawa-Abe, T. Hayashi, K. Hosoda, G. Inoue, Y. Yoshimasa, et al.
Transgenic Overexpression of Leptin Rescues Insulin Resistance and Diabetes in a Mouse Model of Lipoatrophic Diabetes
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J. K. Kim, J. J. Fillmore, Y. Chen, C. Yu, I. K. Moore, M. Pypaert, E. P. Lutz, Y. Kako, W. Velez-Carrasco, I. J. Goldberg, et al.
Tissue-specific overexpression of lipoprotein lipase causes tissue-specific insulin resistance
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J. M. Zabolotny, Y.-B. Kim, O. D. Peroni, J. K. Kim, M. A. Pani, O. Boss, L. D. Klaman, S. Kamatkar, G. I. Shulman, B. B. Kahn, et al.
Overexpression of the LAR (leukocyte antigen-related) protein-tyrosine phosphatase in muscle causes insulin resistance
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R. H. UNGER and L. ORCI
Diseases of liporegulation: new perspective on obesity and related disorders
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S. F. Previs, D. J. Withers, J.-M. Ren, M. F. White, and G. I. Shulman
Contrasting Effects of IRS-1 Versus IRS-2 Gene Disruption on Carbohydrate and Lipid Metabolism in Vivo
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L. L. Listenberger, D. S. Ory, and J. E. Schaffer
Palmitate-induced Apoptosis Can Occur through a Ceramide-independent Pathway
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J. M. Zabolotny, Y.-B. Kim, O. D. Peroni, J. K. Kim, M. A. Pani, O. Boss, L. D. Klaman, S. Kamatkar, G. I. Shulman, B. B. Kahn, et al.
Overexpression of the LAR (leukocyte antigen-related) protein-tyrosine phosphatase in muscle causes insulin resistance
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J. K. Kim, J. J. Fillmore, Y. Chen, C. Yu, I. K. Moore, M. Pypaert, E. P. Lutz, Y. Kako, W. Velez-Carrasco, I. J. Goldberg, et al.
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S. Neschen, I. Moore, W. Regittnig, C. L. Yu, Y. Wang, M. Pypaert, K. F. Petersen, and G. I. Shulman
Contrasting effects of fish oil and safflower oil on hepatic peroxisomal and tissue lipid content
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Copyright © 2000 by the American Society for Biochemistry and Molecular Biology.
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