RGD Reference Report - Modulation of adipoinsular axis in prediabetic zucker diabetic fatty rats by diazoxide. - Rat Genome Database

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Modulation of adipoinsular axis in prediabetic zucker diabetic fatty rats by diazoxide.

Authors: Alemzadeh, R  Tushaus, KM 
Citation: Alemzadeh R and Tushaus KM, Endocrinology 2004 Dec;145(12):5476-84. Epub 2004 Aug 19.
RGD ID: 1354693
Pubmed: PMID:15319354   (View Abstract at PubMed)
DOI: DOI:10.1210/en.2003-1523   (Journal Full-text)

Dysregulation of the adipoinsular axis in male obese Zucker diabetic fatty (ZDF; fa/fa) rats, a model of type 2 diabetes, results in chronic hyperinsulinemia and increased de novo lipogenesis in islets, leading to beta-cell failure and diabetes. Diazoxide (DZ; 150 mg/kg.d), an inhibitor of insulin secretion, was administered to prediabetic ZDF animals for 8 wk as a strategy for prevention of diabetes. DZ reduced food intake (P < 0.02) and rate of weight gain only in ZDF rats (P < 0.01). Plasma insulin response to glucose load was attenuated in DZ-Zucker lean rats (ZL; P < 0.01), whereas DZ-ZDF had higher insulin response to glucose than controls (P < 0.001). DZ improved hemoglobin A1c (P < 0.001) and glucose tolerance in ZDF (P < 0.001), but deteriorated hemoglobin A1c in ZL rats (P < 0.02) despite normal tolerance in the fasted state. DZ lowered plasma leptin (P < 0.001), free fatty acid, and triglyceride (P < 0.001) levels, but increased adiponectin levels (P < 0.02) only in ZDF rats. DZ enhanced beta3-adrenoreceptor mRNA (P < 0.005) and adenylate cyclase activity (P < 0.01) in adipose tissue from ZDF rats only, whereas it enhanced islet beta3- adrenergic receptor mRNA (P < 0.005) but paradoxically decreased islet adenylate cyclase activity (P < 0.005) in these animals. Islet fatty acid synthase mRNA (P < 0.03), acyl coenzyme A carboxylase mRNA (P < 0.01), uncoupling protein-2 mRNA (P < 0.01), and triglyceride content (P < 0.005) were only decreased in DZ-ZDF rats, whereas islet insulin mRNA and insulin content were increased in DZ-ZDF (P < 0.01) and DZ-ZL rats (P < 0.03). DZ-induced beta-cell rest improved the lipid profile, enhanced the metabolic efficiency of insulin, and prevented beta-cell dysfunction and diabetes in diabetes-prone animals. This therapeutic strategy may be beneficial in preventing beta-cell failure and progression to diabetes in humans.



RGD Manual Disease Annotations    Click to see Annotation Detail View

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
Crl:ZUC-LeprfaRattype 2 diabetes mellitus  IAGP  RGD 
ZDF-Leprfa/DrtRattype 2 diabetes mellitus MODEL: spontaneousIAGP  RGD 

Phenotype Annotations    Click to see Annotation Detail View

Mammalian Phenotype

Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
ZDF-Leprfa/DrtRatdecreased body weight inducedIAGPdiazoxide or Pair-fed diet RGD 
ZDF-Leprfa/DrtRatdecreased circulating free fatty acids level inducedIAGPdiazoxidecompared to ZDF-Leprfa/Drt and ZDF-Leprfa/Drt pair-fedRGD 
ZDF-Leprfa/DrtRatdecreased circulating insulin level  IAGPPair-fed dietcompared to ZDF-Leprfa/DrtRGD 
ZDF-Leprfa/DrtRatdecreased circulating leptin level inducedIAGPdiazoxidecompared to ZDF-Leprfa/Drt and ZDF-Leprfa/Drt pair-fedRGD 
ZDF-Leprfa/DrtRatdecreased circulating triglyceride level inducedIAGPdiazoxidecompared to ZDF-Leprfa/Drt and ZDF-Leprfa/Drt pair-fedRGD 
ZDF-Leprfa/DrtRatdecreased fasting circulating glucose level inducedIAGPdiazoxide or Pair-fed diet RGD 
ZDF-Leprfa/DrtRatdecreased food intake inducedIAGPdiazoxide or Pair-fed diet RGD 
ZDF-Leprfa/DrtRatdecreased glycosylated hemoglobin level inducedIAGPdiazoxidecompared to ZDF-Leprfa/Drt and ZDF-Leprfa/Drt pair-fedRGD 
ZDF-Leprfa/DrtRatdecreased susceptibility to non-insulin-dependent diabetes inducedIAGPdiazoxide RGD 
ZDF-Leprfa/DrtRatdecreased susceptibility to weight gain inducedIAGPdiazoxide or Pair-fed diet RGD 
ZDF-Leprfa/DrtRatincreased body weight inducedIAGPdiazoxide or Pair-fed diet RGD 
ZDF-Leprfa/DrtRatincreased body weight  IAGP compared to Zucker Lean more ...RGD 
ZDF-Leprfa/DrtRatincreased circulating adiponectin level inducedIAGPdiazoxidecompared to ZDF-Leprfa/Drt and ZDF-Leprfa/Drt pair-fedRGD 
ZDF-Leprfa/DrtRatincreased circulating free fatty acids level inducedIAGPdiazoxide or Pair-fed diet RGD 
ZDF-Leprfa/DrtRatincreased circulating free fatty acids level  IAGP compared to Zucker Lean more ...RGD 
ZDF-Leprfa/DrtRatincreased circulating insulin level inducedIAGPdiazoxide or Pair-fed diet RGD 
ZDF-Leprfa/DrtRatincreased circulating insulin level  IAGP compared to Zucker Lean more ...RGD 
ZDF-Leprfa/DrtRatincreased circulating leptin level inducedIAGPdiazoxidecompared to Zucker Lean more ...RGD 
ZDF-Leprfa/DrtRatincreased circulating leptin level  IAGP compared to Zucker Lean more ...RGD 
ZDF-Leprfa/DrtRatincreased circulating triglyceride level inducedIAGPdiazoxidecompared to Zucker Lean more ...RGD 
ZDF-Leprfa/DrtRatincreased circulating triglyceride level  IAGP compared to Zucker LeanRGD 
ZDF-Leprfa/DrtRatincreased fasting circulating glucose level  IAGPPair-fed dietcompared to Zucker Lean more ...RGD 
ZDF-Leprfa/DrtRatincreased fasting circulating glucose level  IAGP compared to Zucker Lean more ...RGD 
ZDF-Leprfa/DrtRatincreased food intake inducedIAGPdiazoxide or Pair-fed diet RGD 
ZDF-Leprfa/DrtRatincreased food intake  IAGP compared to Zucker Lean more ...RGD 
ZDF-Leprfa/DrtRatincreased insulin sensitivity inducedIAGPdiazoxidecompared to ZDF-Leprfa/DrtRGD 
ZDF-Leprfa/DrtRatincreased susceptibility to weight gain inducedIAGPdiazoxide or Pair-fed diet RGD 
ZDF-Leprfa/DrtRatincreased susceptibility to weight gain  IAGP compared to Zucker Lean more ...RGD 
Objects Annotated

Strains
Crl:ZUC-Leprfa  (Zucker rats)
ZDF-Leprfa/Drt  (Zucker Diabetic Fatty Rat)


Additional Information