Cholesteryl ester transfer protein expression prevents diet-induced atherosclerotic lesions in male db/db mice.
OBJECTIVE
Accompanying more atherogenic lipoprotein profiles and an increased incidence of atherosclerosis, plasma cholesteryl ester transfer protein (CETP) is depressed in diabetic obese patients compared with nondiabetic obese counterparts. The depressed levels of CETP in the plasma of diabetic obese individuals may contribute to the development of an atherogenic lipoprotein profile and atherogenesis. We have examined the effect of CETP expression on vascular health in the db/db model of diabetic obesity.


RESULTS
Transgenic mice expressing the human CETP minigene were crossed with db/db strain, and 3 groups of offspring (CETP, db, and db/CETP) were placed on an atherogenic diet for 16 weeks. The proximal aorta was then excised and examined for the presence of atherosclerotic plaques. In db mice, 9 of 11 had intimal lesions with a mean area of 26 098+/-7486 microm2. No lesions greater than 1000 microm2 were observed in db/CETP or CETP mice. CETP-expressing mice had lower circulating cholesterol concentrations than db mice. Fractionating plasma lipids by FPLC indicated that the difference in total cholesterol was primarily attributable to differences in VLDL and LDL.


CONCLUSIONS
The expression of human CETP in db/db mice prevented the formation of diet-induced lesions, suggesting an antiatherogenic effect of CETP in the context of diabetic obesity.
MacLean
Paul S
PS
Department of Biochemistry, Brody School of Medicine, East Carolina University, Greenville, NC, USA. Paul.MacLean@UCHSC.edu
Bower
Joseph F
JF
Vadlamudi
Satyaprasad
S
Osborne
Jody N
JN
Bradfield
John F
JF
Burden
Hubert W
HW
Bensch
William H
WH
Kauffman
Raymond F
RF
Barakat
Hisham A
HA
D000818:Animals; D001161:Arteriosclerosis / Q000150:complications / Q000378:metabolism* / Q000517:prevention & control*; D002352:Carrier Proteins / Q000378:metabolism*; D002784:Cholesterol / Q000097:blood; D053480:Cholesterol Ester Transfer Proteins; D008078:Cholesterol, LDL / Q000097:blood; D015243:Cholesterol, VLDL / Q000097:blood; D048909:Diabetes Complications; D003920:Diabetes Mellitus / Q000378:metabolism*; D006023:Glycoproteins; D051379:Mice; D008822:Mice, Transgenic; D009765:Obesity / Q000150:complications / Q000378:metabolism*; D014280:Triglycerides / Q000097:blood
C506642:CETP protein, human; D002352:Carrier Proteins; D053480:Cholesterol Ester Transfer Proteins; D008078:Cholesterol, LDL; D015243:Cholesterol, VLDL; D006023:Glycoproteins; D014280:Triglycerides; D002784:Cholesterol