Abstract
A typical clinical feature of patients with fasting hyperglycemia in diabetes is well correlated with accelerated hepatic glucose production which is determined by elevated FFA-induced gluconeogenesis. Therefore, to treat fasting hyperglycemia, inhibition of both FFA release and fatty acid oxidation in the liver may be efficient modalities of treatment. (1) Inhibitor of FFA release: a novel selective adenosine Al agonist, SDZ WAG 994 is a potent inhibitor of adenosine deaminase-induced lipolysis. Twenty-three-week old, male GK rats showing glucose intolerance were treated with WAG 994 (1000 μg/kg body weight) for 16 days. Plasma glucose level at 0 time in WAG group was significantly ( P < 0.01) less than that of the control. Both plasma FFA and triglyceride concentrations also decreased by 54% and 74%, respectively (vs. control GK rats). (2) Inhibition of hepatic fatty acid oxidation: β-aminobetaine (emeriamine) is a water-soluble carnitine analog and inhibition of CPT-1 in isolated hepatocytes is 100 times more sensitive than that in isolated cardiocytes and it suppresses both gluconeogenesis and ketogenesis by 60-80%. However, it may be possible that this drug may induce fat deposition in the liver. An inhibitor of elevated fatty acid release from adipose tissue in concomitant with liver-specific and reversible inhibition of fatty acid oxidation may be an effective agent with hypoglycemic and hypolipidemic action for the treatment of diabetes mellitus.
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