Exploring the Roles of CREBRF and TRIM2 in the Regulation of Angiogenesis by High-Density Lipoproteins

Exploring the Roles of CREBRF and TRIM2 in the Regulation of Angiogenesis by High-Density Lipoproteins.

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Item Type: Article
Status: Published
Official URL: https://doi.org/10.3390/ijms19071903
Journal or Publication Title: International Journal of Molecular Sciences
Volume: 19
Number: 7
Page Range: p. 1903
Date: 2018
Divisions: Molecular Cardiology
Depositing User: General Admin
Identification Number: 10.3390/ijms19071903
ISSN: 1422-0067
Date Deposited: 04 Jan 2021 23:29

Angiogenesis, the process of forming new blood vessels, is crucial in the physiological response to ischemia, though it can be detrimental as part of inflammation and tumorigenesis. We have previously shown that high-density lipoproteins (HDL) modulate angiogenesis in a context-specific manner via distinct classical signalling pathways, enhancing hypoxia-induced angiogenesis while suppressing inflammatory-driven angiogenesis. Whether additional novel targets exist to account for these effects are unknown. A microarray approach identified two novel genes, cyclic-adenosine-monophosphate-response-element-binding protein 3 regulatory factor (CREBRF) and tripartite motif-containing protein 2 (TRIM2) that were upregulated by reconstituted HDL (rHDL). We measured CREBRF and TRIM2 expression in human coronary artery endothelial cells following incubation with rHDL and exposure to either hypoxia or an inflammatory stimulus. We found that CREBRF and TRIM2 mRNA were significantly upregulated by rHDL, particularly in response to its phospholipid component 1-palmitoyl-2-linoleoyl-phosphatidylcholine, however, protein expression was not significantly altered. Knockdown of TRIM2 impaired endothelial cell tubulogenesis in vitro in both hypoxia and inflammation, implying a necessary role in angiogenesis. Furthermore, TRIM2 knockdown attenuated rHDL-induced tubule formation in hypoxia, suggesting that it is important in mediating the pro-angiogenic action of rHDL. Our study has implications for understanding the regulation of angiogenesis in both of these pathophysiological contexts by HDL.

Wong, Nathan
Cheung, Helena
Solly, Emma
Vanags, Laura
Ritchie, William
Nicholls, Stephen
Ng, Martin
Bursill, Christina
Tan, Joanne
Last Modified: 04 Jan 2021 23:29
URI: https://eprints.centenary.org.au/id/eprint/575

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