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- Title
AMPD1: a novel therapeutic target for reversing insulin resistance.
- Authors
Jidong Cheng; Hiroko Morisaki; Keiko Toyama; Naomi Sugimoto; Takuya Shintani; Andreas Tandelilin; Tetsuaki Hirase; Edward W Holmes; Takayuki Morisaki
- Abstract
Background Insulin resistance is one of the hallmark manifestations of obesity and Type II diabetes and reversal of this pathogenic abnormality is an attractive target for new therapies for Type II diabetes. A recent report that metformin, a drug known to reverse insulin resistance, demonstrated in vitro the metformin can inhibit AMP deaminase (AMPD) activity. Skeletal muscle is one of the primary organs contributing to insulin resistance and that the AMPD1 gene is selectively expressed at high levels in skeletal muscle. Methods Recognizing the background above, we asked if genetic disruption of the AMPD1 gene might ameliorate the manifestations of insulin resistance. AMPD1 deficient homozygous mice and control mice fed normal chow diet or a high-fat diet, and blood analysis, glucose tolerance test and insulin tolerance test were performed. Also, skeletal muscle metabolism and gene expression including nucleotide levels and activation of AMP activated protein kinase (AMP kinase) were evaluated in both conditions. Results Disruption of the AMPD1 gene leads to a less severe state of insulin resistance, improved glucose tolerance and enhanced insulin clearance in mice fed a high fat diet. Given the central role of AMP kinase in insulin action, and its response to changes in AMP concentrations in the cell, we examined the skeletal muscle of the AMPD1 deficient mice and found that they have greater AMP kinase activity as evidenced by higher levels of phosphorylated AMP kinase. Conclusions Taken together these data suggest that AMPD may be a new drug target for the reversal of insulin resistance and the treatment of Type II diabetes.
- Subjects
INSULIN resistance; TYPE 2 diabetes treatment; ADIPOSE tissues; ANIMAL experimentation; BLOOD testing; CHOLESTEROL; COMPUTED tomography; DIFFUSION of innovations; ENDOCRINE diseases; FATTY acids; INSULIN; MICE; TYPE 2 diabetes; OBESITY; SERIAL publications; TRIGLYCERIDES; VITAMIN B complex; WESTERN immunoblotting; LEPTIN; CONTROL groups; METFORMIN; ADIPONECTIN; IN vitro studies; PREVENTION
- Publication
BMC Endocrine Disorders, 2014, Vol 14, Issue 1, p45
- ISSN
1472-6823
- Publication type
Article
- DOI
10.1186/1472-6823-14-96