Abstract
The time course of changes in lipoprotein metabolism of obese offspring of mildly diabetic rats was studied with respect to serum lipoprotein composition as well as LCAT and tissue lipoprotein lipase (LPL) activities. Mild hyperglycemia in pregnant rats was induced by intraperitoneal injection of streptozotocin on day 5 of gestation. Control pregnant rats were injected with citrate buffer. At birth, obese pups had higher serum glucose, insulin, and lipoprotein (VLDL, LDL-HDL1, HDL2–3) levels than control pups. After 1 mon of life, all of these parameters in obese rats became similar to those of controls. However, LCAT, adipose tissue LPL, and hepatic triacylglycerol lipase activities were high. At 2 mon of age, VLDL-TAG levels were higher in obese females than in controls. By the age of 3 mon, obese offspring had developed insulin resistance with hyperglycemia, hyperinsulinemia, and higher serum lipoprotein concentrations. Indeed, qualitative abnormalities of lipoproteins were seen and were typical of obese and diabetic human beings. Fetal hyperinsulinemia should be considered as a risk factor for later metabolic diseases, including dyslipoproteinemia.
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Abbreviations
- Apo:
-
apolipoproteins
- EC:
-
esterified cholesterol
- HTGL:
-
hepatic triacylglycerol lipase
- LPL:
-
lipoprotein lipase
- PL:
-
phospholipid
- TAG:
-
triacylglycerol
- UC:
-
unesterified cholesterol
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Merzouk, H., Madani, S., Hichami, A. et al. Impaired lipoprotein metabolism in obese offspring of streptozotocin-induced diabetic rats. Lipids 37, 773–781 (2002). https://doi.org/10.1007/s11745-002-0960-9
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DOI: https://doi.org/10.1007/s11745-002-0960-9