| Project/Area Number |
01480289
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
内分泌・代謝学
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| Research Institution | Osaka University |
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Principal Investigator |
MATSUZAWA Yuji Osaka University Medical School Lecturer, 医学部, 講師 (70116101)
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| Co-Investigator(Kenkyū-buntansha) |
FUNAHASHI Tohru Osaka University University Hospital Staff, 医学部・附属病院, 医員
KUBO Masaharu Osaka University Medical School Assistant, 医学部, 助手 (50161667)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥6,700,000 (Direct Cost: ¥6,700,000)
Fiscal Year 1990: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1989: ¥4,000,000 (Direct Cost: ¥4,000,000)
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| Keywords | Cholestaryl ester travster protein / Reverse cholesterol transport / Hyper HDL cholesherolemia / Atherosc lerosis / High density lipoprotein / Low density lipoprotein / CETP gene / コレステロ-ルエステル転送蛋白 / HDL / LDL / 動脈硬化防御機構 / 肝性リパ-ゼ / 角膜混濁 / LDL-レセプタ- |
|---|
| Research Abstract |
High density lipoprotein has been believed to play an important role in protecting atherosclerosis and the deficiency of HDL causes premature atherosclerosis. However, we have reported some types of hyper HDL cholesterolemia may be accompanied with lipid storage including coronary atherosclerosis and corneal opacities similar to HDL deficiency. In this study, we found the cases with hyper HDL cholesterolemia with Chdesterol Ester Transfer Protein (CETP) deficiency and studied the lipoprotein metabolism in this metabolic disorder to clarify physiological roles of CETP in the preventive system against atherosclerosis. HDL pasticles were shown to be markidly enlarged with high content of cholesteryl ester (CE) and apolipoprotein E. We demonstrated that LDL penticles also became abnormal in CETP deficiency. Namely, particles became polydisperse and consist of two groups different in size. These result suggests that CETP may play an important role in transferring CE from HDL to LDL and forming mature and homogeneous LDL.
The defect of this process may result in cholesterol transport system from peripheral tissues to liver and finally cause the impairment of prevention against lipid storage in tissues.
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