Diabetes, Vol 38, Issue 5 648-652, Copyright © 1989 by American Diabetes Association
Normalization of insulin sensitivity with lithium in diabetic rats
L Rossetti
Diabetes/Endocrinology Division, Yale University School of Medicine, New Haven, Connecticut.
Lithium salts are commonly used in psychiatric patients and have been shown
to have an insulinlike action in vitro. To define the impact of lithium ion
on in vivo glucose metabolism, the effect of 2 wk of lithium treatment on
plasma glucose and insulin concentrations, insulin-mediated glucose
disposal, and skeletal muscle glycogen synthesis in normal and diabetic
rats was examined. Our results demonstrated the ability of lithium ions to
completely restore insulin sensitivity to normal in diabetic rats. The
insulin-mimetic activity of the cation seems to be highly specific for the
glycogenic pathway in skeletal muscle. These results raise the possibility
that lithium ion may prove effective in reversing the defect in glycogen
storage that characterizes non-insulin-dependent diabetes mellitus in
humans.