SR-BI associates with ABCG1 and inhibits ABCG1-mediated cholesterol efflux from cells to high-density lipoprotein 3
<p>Abstract</p> <p>Background</p> <p>The single and combined effects of scavenger receptor-BI (SR-BI), ATP-binding cassette transporter (ABC) A1 and G1 on cholesterol efflux from Chinese Hamster Ovary (CHO) cells were investigated.</p> <p>Results</p> &...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
BMC
2012-09-01
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| Series: | Lipids in Health and Disease |
| Online Access: | http://www.lipidworld.com/content/11/1/118 |
| _version_ | 1811317951651905536 |
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| author | Song Guohua Zong Chuanlong Liu Qian Si Yanhong Liu Jie Li Wei Zhu Ping Qin Shucun |
| author_facet | Song Guohua Zong Chuanlong Liu Qian Si Yanhong Liu Jie Li Wei Zhu Ping Qin Shucun |
| author_sort | Song Guohua |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>The single and combined effects of scavenger receptor-BI (SR-BI), ATP-binding cassette transporter (ABC) A1 and G1 on cholesterol efflux from Chinese Hamster Ovary (CHO) cells were investigated.</p> <p>Results</p> <p>When apolipoproteinA-I (apoA-I) was used as an acceptor, ABCA1 overexpression led to an increase in total cholesterol (TC) in medium which is attributable to a 2-fold increase in free cholesterol (FC) content. When high-density lipoprotein 3 (HDL3) was used as an acceptor, SR-BI overexpression not only promoted FC efflux, but also promoted the uptake of cholesteryl ester (CE) into cells, resulting in no TC varieties in medium. Overexpression of ABCG1 increased both the FC and CE levels in medium. However, when apoA-I and HDL3 were both used as acceptors, coexpression of SR-BI has no effect on ABCA1-mediated increased FC and TC accumulation in medium. Interestingly, coexpression of SR-BI with ABCG1 blocked the ABCG1-mediated cholesterol efflux to HDL3, mostly by promoting the reuptake of CE from the medium. Furthermore, co-immunoprecipitation experiments revealed that SR-BI interacted with ABCG1 in BHK cells overexpressing ABCG1 and SR-BI.</p> <p>Conclusions</p> <p>We found SR-BI associates with ABCG1 and inhibits ABCG1-mediated cholesterol efflux from cells to HDL3.</p> |
| first_indexed | 2024-04-13T12:17:17Z |
| format | Article |
| id | doaj.art-801fb54dd3f84e4e83c139a2e5d782ff |
| institution | Directory Open Access Journal |
| issn | 1476-511X |
| language | English |
| last_indexed | 2024-04-13T12:17:17Z |
| publishDate | 2012-09-01 |
| publisher | BMC |
| record_format | Article |
| series | Lipids in Health and Disease |
| spelling | doaj.art-801fb54dd3f84e4e83c139a2e5d782ff2022-12-22T02:47:20ZengBMCLipids in Health and Disease1476-511X2012-09-0111111810.1186/1476-511X-11-118SR-BI associates with ABCG1 and inhibits ABCG1-mediated cholesterol efflux from cells to high-density lipoprotein 3Song GuohuaZong ChuanlongLiu QianSi YanhongLiu JieLi WeiZhu PingQin Shucun<p>Abstract</p> <p>Background</p> <p>The single and combined effects of scavenger receptor-BI (SR-BI), ATP-binding cassette transporter (ABC) A1 and G1 on cholesterol efflux from Chinese Hamster Ovary (CHO) cells were investigated.</p> <p>Results</p> <p>When apolipoproteinA-I (apoA-I) was used as an acceptor, ABCA1 overexpression led to an increase in total cholesterol (TC) in medium which is attributable to a 2-fold increase in free cholesterol (FC) content. When high-density lipoprotein 3 (HDL3) was used as an acceptor, SR-BI overexpression not only promoted FC efflux, but also promoted the uptake of cholesteryl ester (CE) into cells, resulting in no TC varieties in medium. Overexpression of ABCG1 increased both the FC and CE levels in medium. However, when apoA-I and HDL3 were both used as acceptors, coexpression of SR-BI has no effect on ABCA1-mediated increased FC and TC accumulation in medium. Interestingly, coexpression of SR-BI with ABCG1 blocked the ABCG1-mediated cholesterol efflux to HDL3, mostly by promoting the reuptake of CE from the medium. Furthermore, co-immunoprecipitation experiments revealed that SR-BI interacted with ABCG1 in BHK cells overexpressing ABCG1 and SR-BI.</p> <p>Conclusions</p> <p>We found SR-BI associates with ABCG1 and inhibits ABCG1-mediated cholesterol efflux from cells to HDL3.</p>http://www.lipidworld.com/content/11/1/118 |
| spellingShingle | Song Guohua Zong Chuanlong Liu Qian Si Yanhong Liu Jie Li Wei Zhu Ping Qin Shucun SR-BI associates with ABCG1 and inhibits ABCG1-mediated cholesterol efflux from cells to high-density lipoprotein 3 Lipids in Health and Disease |
| title | SR-BI associates with ABCG1 and inhibits ABCG1-mediated cholesterol efflux from cells to high-density lipoprotein 3 |
| title_full | SR-BI associates with ABCG1 and inhibits ABCG1-mediated cholesterol efflux from cells to high-density lipoprotein 3 |
| title_fullStr | SR-BI associates with ABCG1 and inhibits ABCG1-mediated cholesterol efflux from cells to high-density lipoprotein 3 |
| title_full_unstemmed | SR-BI associates with ABCG1 and inhibits ABCG1-mediated cholesterol efflux from cells to high-density lipoprotein 3 |
| title_short | SR-BI associates with ABCG1 and inhibits ABCG1-mediated cholesterol efflux from cells to high-density lipoprotein 3 |
| title_sort | sr bi associates with abcg1 and inhibits abcg1 mediated cholesterol efflux from cells to high density lipoprotein 3 |
| url | http://www.lipidworld.com/content/11/1/118 |
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