Abstract
High-density lipoprotein (HDL) exerts antiatherogenic effects by various mechanisms. The protective effect of HDL is thought to involve the reverse transport of cholesterol from cells in the arterial wall to the liver for disposal. We previously identified human scavenger receptor BI (hSR-BI/CLA-1) as a receptor for human HDL, but did not examine the expression of hSR-BI/CLA-1 in smooth-muscle cells. In this present study, a human aortic intima smooth-muscle cell line immortalized with SV 40 DNA was established, and the expression of hSR-BI/CLA-1 in this cell line analyzed by Western blot and RT-PCR. HSR-BI/CLA-1 mRNA and protein were detected in both this cell line and primary human aortic smooth-muscle cells. A cytokine, interferon-gamma (IFN-gamma) inhibited the hSR-BI/CLA-1 protein expression, but not mRNA expression. This observation confirmed that selective cholesterol ester uptake from HDL was inhibited by IFN-gamma. These results indicated that hSR-BI/CLA-1 may be expressed in human smooth-muscle cells, and the expression may be modulated by IFN-gamma. HSR-BI/CLA-1 on smooth-muscle cells could play an important role in atherogenesis.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et metabolisme
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
