Documenta Ophthalmologica

, Volume 117, Issue 3, pp 191–196

Electroretinographic study of spontaneously diabetic Torii rats

  • Takashi Okuno
  • Hidehiro Oku
  • Tetsuya Sugiyama
  • Tsunehiko Ikeda
Original Research Article

DOI: 10.1007/s10633-008-9122-0

Cite this article as:
Okuno, T., Oku, H., Sugiyama, T. et al. Doc Ophthalmol (2008) 117: 191. doi:10.1007/s10633-008-9122-0

Abstract

Spontaneously diabetic Torii (SDT) rats are an inbred strain of rats with a non-obese type 2 diabetes mellitus that were isolated from an outbred colony of Sprague–Dawley (SD) rats. Electroretinograms (ERGs) were recorded from SDT and SD (controls) rats at 10- and 44-weeks-of-age to determine their retinal function. The amplitudes and implicit times of the ERGs of the right and left eyes were not significantly different indicating that the intra-individual variation was small. Both amplitudes and implicit times of the ERGs in the SDT rats were not significantly different from those of SD rats at 10-weeks-of-age. At 44-weeks-of-age, however, the a- and b-waves and the oscillatory potentials were significantly reduced with prolonged implicit times in the SDT rats compared to SD rats. These depressed ERGs may reflect vascular and neuronal damage throughout the retina as are seen in the advanced stages of human diabetic retinopathy. Thus, the SDT rat can be used to study the retinal physiology of diabetic retinopathy.

Keywords

Spontaneously diabetic Torii ratsElectroretinogram

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Takashi Okuno
    • 1
  • Hidehiro Oku
    • 1
  • Tetsuya Sugiyama
    • 1
  • Tsunehiko Ikeda
    • 1
  1. 1.Department of OphthalmologyOsaka Medical CollegeOsakaJapan