Journal
JOURNAL OF CELLULAR AND MOLECULAR MEDICINE
Volume 24, Issue 6, Pages 3292-3302Publisher
WILEY
DOI: 10.1111/jcmm.15002
Keywords
Atherosclerosis; CD36; degradation; foam cell; USP14
Categories
Funding
- National Natural Science Foundation of China [81400231, 81873474, 81570259]
- Natural Science Foundation of Guangdong Province [2017A030313796]
- Guangzhou health and family planning science and technology project [20181A011066, 20162A011018]
- Education Features Innovative Project of Guangdong Province [2016KQNCX134]
- Guangzhou Education Commission, the Key Medical Disciplines and Specialties Program of Guangzhou (2017-2019) [1201610098]
- Guangzhou Medical University [2016C17]
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Atherosclerosis is regarded as a chronic progressive inflammatory disease and is a basic pathophysiological process in coronary artery disease which is life threatening in clinic. The formation of foam cell plays a key role in the pathogenesis of atherosclerosis. OxLDL is a significant factor in progression of coronary artery disease. Our studies have demonstrated that USP14 promotes cancer development and mediates progression of cardiac hypertrophy and LPS-induced inflammation. However, the underlying mechanism of USP14 is unknown. In this study, we found that the inhibition of USP14 significantly suppressed the oxLDL uptake, subsequently decreased the foam cell formation. Surprisingly, USP14 has an effect on the expression of CD36 but not SR-A, ABCA1, Lox-1, ABCG1 and SR-Bl. Furthermore, USP14 stabilizes CD36 protein via cleaving the ubiquitin chain on CD36. Blocking CD36 activation using antibody-dependent blocking assay remarkably attenuated the function of USP14 on the formation of foam cell. In summary, our results suggested that the inhibition of USP14 decreases foam cell formation by down-regulating CD36-mediated lipid uptake and provides a potential therapeutic target for atherosclerosis.
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