Streptozotocin-induced diabetic rats / mice (STZ)

STREPTOZOTOCIN-INDUCED DIABETIC RATS / MICE (STZ)

Streptozotocin-induced-diabetic-rats-mice-STZ

Click to view
logo_ok
UFR Simone Veil - Santé
Université de Versailles St Quentin en Yvelines
2 Avenue de la Source de la Bièvre - 78180 Montigny-Le-Bretonneux FRANCE
Posted in Metabolic Syndrome and Diabetes and tagged ,
Comments Off on Streptozotocin-induced diabetic rats / mice (STZ)

Zucker diabetic fatty (ZDF) rats_Type II diabetes

Zucker diabetic fatty (ZDF) rats_Type II diabetes

MODEL ADVANTAGES

The Zucker Diabetic Fatty (ZDF) rat fed a lipid-rich diet, closely mimics human adult onset of type II diabetes and its related complications. In time, ZDF rats evolve from a model of metabolic syndrome to a type II diabetic rat based on impaired glucose tolerance caused by the inherited obesity gene mutation which leads to insulin resistance.

 

PATHOPHYSIOLOGICAL FEATURES

Metabolic features

  • Age-dependent evolution from insulin resistance to type II Diabetes mellitus (figure 1)
  • Variable hyperinsulinemia
  • Hyperglycemia
  • Hypertriglyceridemia / Hypercholesterolemia
Figure 1: Age-dependent evolution of glucose metabolism in ZDF rats.
Figure 1: Age-dependent evolution of glucose metabolism in ZDF rats.

Cardiovascular features

  • Vascular endothelial dysfunction (aorta, superior mesenteric artery, …) from 20 weeks of age (figure 2)
Figure 2: Comparison of endothelium-dependent relaxations in ZDF and in their control (Lean) obtained in in vitro experiments performed in aortic and superior mesenteric artery rings. (2-way ANOVA, ***P<0.001) (Pelvipharm, internal data).
Figure 2: Comparison of endothelium-dependent relaxations in ZDF and in their control (Lean) obtained in in vitro experiments performed in aortic and superior mesenteric artery rings. (2-way ANOVA, ***P<0.001) (Pelvipharm, internal data).

Other pathophysiological features

  • Nephropathy
  • Neuropathy
  • Blindness
  • Impaired wound healing

 

SUMMARIZED METHODOLOGY

  • ZDF: homozygous for non-functional leptin receptors (ZDF/Gmi fa/fa)
  • Lean controls: homozygous for normal receptors remain lean and normoglycaemic
    (ZDF/Gmi +/?)
logo_ok
UFR Simone Veil - Santé
Université de Versailles St Quentin en Yvelines
2 Avenue de la Source de la Bièvre - 78180 Montigny-Le-Bretonneux FRANCE
Posted in Uncategorized and tagged
Comments Off on Zucker diabetic fatty (ZDF) rats_Type II diabetes