Characterization of Diabetic Neuropathy in the Zucker Diabetic Sprague-Dawley Rat: a New Animal Model for Type 2 Diabetes

Overview

Journal J Diabetes Res

Publisher Wiley

Specialty Endocrinology

Date 2014 Nov 6

PMID 25371906

Citations 16

Authors

Eric P Davidson

Lawrence J Coppey

Amey Holmes

Sergey Lupachyk

Brian L Dake

Christine L Oltman

Richard G Peterson

Mark A Yorek

Affiliations

Soon will be listed here.

Abstract

Recently a new rat model for type 2 diabetes the Zucker diabetic Sprague-Dawley (ZDSD/Pco) was created. In this study we sought to characterize the development of diabetic neuropathy in ZDSD rats using age-matched Sprague-Dawley rats as a control. Rats were examined at 34 weeks of age 12 weeks after the onset of hyperglycemia in ZDSD rats. At this time ZDSD rats were severely insulin resistant with slowing of both motor and sensory nerve conduction velocities. ZDSD rats also had fatty livers, elevated serum free fatty acids, triglycerides, and cholesterol, and elevated sciatic nerve nitrotyrosine levels. The corneas of ZDSD rats exhibited a decrease in subbasal epithelial corneal nerves and sensitivity. ZDSD rats were hypoalgesic but intraepidermal nerve fibers in the skin of the hindpaw were normal compared to Sprague-Dawley rats. However, the number of Langerhans cells was decreased. Vascular reactivity of epineurial arterioles, blood vessels that provide circulation to the sciatic nerve, to acetylcholine and calcitonin gene-related peptide was impaired in ZDSD rats. These data indicate that ZDSD rats develop many of the neural complications associated with type 2 diabetes and are a good animal model for preclinical investigations of drug development for diabetic neuropathy.

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