Changes in activities of enzymes related to energy metabolism in peripheral leukocytes of diabetic dogs with glycemic control by intensive insulin treatment.
Changes in plasma glucose, immunoreactive insulin (IRI), and free fatty acids (FFA) concentrations and activities of enzymes related to energy metabolism in peripheral leukocytes were measured in type 1 diabetic dogs induced by streptozotocin administration before and after intensive insulin treatments. Before the insulin treatment, the plasma glucose concentrations were over 16.7 mmol/L and the activities of enzymes remarkably decreased in leukocytes of the diabetic dogs. In particular, malate dehydrogenase (MDH) activities decreased significantly. After glycemic control was achieved by insulin treatment, the plasma glucose concentrations were maintained between 6.8 and 7.7 mmol/L and the activities of enzymes restored to those in the control dogs. The changes in ML ratio (cytosolic MDH/lactate dehydrogenase specific activity ratio) reflected faithfully to metabolic conditions of animals and were considered to be a useful parameter to evaluate glycemic control and the effect of injected insulin in the diabetic dogs.
Division of Veterinary Biochemistry, Department of Veterinary Science, Nippon Veterinary and Animal Science University, Kyonancho, Musashino, Tokyo 180-8602, Japan. tarai@nvau.ac.jp
T
T
Arai
M
M
Nakamura
E
E
Magori
H
H
Fukuda
H
H
Mizutani
E
E
Kawakami
T
T
Sako
D000818:Animals; D001786:Blood Glucose / Q000032:analysis*; D003921:Diabetes Mellitus, Experimental / Q000097:blood / Q000139:chemically induced / Q000201:enzymology / Q000378:metabolism*; D004283:Dog Diseases / Q000097:blood / Q000201:enzymology / Q000378:metabolism; D004285:Dogs; D004734:Energy Metabolism / Q000187:drug effects*; D005230:Fatty Acids, Nonesterified / Q000032:analysis; D005260:Female; D007328:Insulin / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use*; D007770:L-Lactate Dehydrogenase / Q000378:metabolism*; D007962:Leukocytes / Q000201:enzymology*; D008291:Malate Dehydrogenase / Q000378:metabolism*; D008297:Male; D013311:Streptozocin
D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D007328:Insulin; D013311:Streptozocin; D007770:L-Lactate Dehydrogenase; D008291:Malate Dehydrogenase