Diabetes, Vol 37, Issue 11 1505-1508, Copyright © 1988 by American Diabetes Association
Prevention of sugar-induced cataractogenesis in rats by butylated hydroxytoluene
SK Srivastava and NH Ansari
Department of Human Biological Chemistry and Genetics, University of Texas Medical Branch, Galveston 77550.
Senile cataractogenesis advanced by diabetes, thought mainly to be due to
accumulation of polyols, is one of the major causes of blindness throughout
the world. Rats fed a 50% galactose diet developed mature cataracts in 23
days, whereas rats fed a 50% galactose diet with 0.4% butylated
hydroxytoluene (BHT) had clear lenses. On day 10, both groups had
comparable galactitol levels in the lens, but hydration in the former
group, as determined by the lens weight, was approximately 10% more than in
the latter. On day 23, galactitol levels in the latter group were 92%
higher (approximately 85 mM) than in the former group, but lens weight was
lower. These results indicate that sugar-induced cataractogenesis in rats
is not solely due to polyol accumulation. Oxidative damage is probably a
major cause of the advancement of cataractogenesis.