Article ; Online: MP Allosterically Activates AMPK to Enhance ABCA1 Stability by Retarding the Calpain-Mediated Degradation Pathway.
International journal of molecular sciences
2023 Volume 24, Issue 24
Abstract: It is widely recognized that macrophage cholesterol efflux mediated by the ATP-binding cassette transporter A1 (ABCA1) constitutes the initial and rate-limiting step of reverse cholesterol transport (RCT), displaying a negative correlation with the ... ...
Abstract | It is widely recognized that macrophage cholesterol efflux mediated by the ATP-binding cassette transporter A1 (ABCA1) constitutes the initial and rate-limiting step of reverse cholesterol transport (RCT), displaying a negative correlation with the development of atherosclerosis. Although the transcriptional regulation of ABCA1 has been extensively studied in previous research, the impact of post-translational regulation on its expression remains to be elucidated. In this study, we report an AMP-activated protein kinase (AMPK) agonist called ((2R,3S,4R,5R)-3,4-dihydroxy-5-(6-((3-hydroxyphenyl) amino)-9H-purin-9-yl) tetrahydrofuran-2-yl) methyl dihydrogen phosphate (MP), which enhances ABCA1 expression through post-translational regulation rather than transcriptional regulation. By integrating the findings of multiple experiments, it is confirmed that MP directly binds to AMPK with a moderate binding affinity, subsequently triggering its allosteric activation. Further investigations conducted on macrophages unveil a novel mechanism through which MP modulates ABCA1 expression. Specifically, MP downregulates the Cav1.2 channel to obstruct the influx of extracellular Ca |
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MeSH term(s) | Calpain/metabolism ; AMP-Activated Protein Kinases/metabolism ; Cholesterol/metabolism ; Macrophages/metabolism ; Proteolysis ; ATP Binding Cassette Transporter 1/genetics ; ATP Binding Cassette Transporter 1/metabolism |
Chemical Substances | Calpain (EC 3.4.22.-) ; AMP-Activated Protein Kinases (EC 2.7.11.31) ; Cholesterol (97C5T2UQ7J) ; ATP Binding Cassette Transporter 1 |
Language | English |
Publishing date | 2023-12-08 |
Publishing country | Switzerland |
Document type | Journal Article |
ZDB-ID | 2019364-6 |
ISSN | 1422-0067 ; 1422-0067 ; 1661-6596 |
ISSN (online) | 1422-0067 |
ISSN | 1422-0067 ; 1661-6596 |
DOI | 10.3390/ijms242417280 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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