| First Author | Buchheiser A | Year | 2011 |
| Journal | Cardiovasc Res | Volume | 92 |
| Issue | 2 | Pages | 338-47 |
| PubMed ID | 21955554 | Mgi Jnum | J:191695 |
| Mgi Id | MGI:5462322 | Doi | 10.1093/cvr/cvr218 |
| Citation | Buchheiser A, et al. (2011) Inactivation of CD73 promotes atherogenesis in apolipoprotein E-deficient mice. Cardiovasc Res 92(2):338-47 |
| abstractText | AIMS: CD73 (ecto-5'-nucleotidase) is expressed by a broad range of immune cells and attenuates inflammation in several acute disease models. This study therefore explored the role of CD73-derived adenosine in a model of chronic vascular inflammation such as atherogenesis. METHODS AND RESULTS: CD73(-/-) mice were backcrossed into the apolipoprotein E (ApoE(-/-)) background. In CD73(-/-)/ApoE(-/-) double mutants, atherosclerotic lesion formation was increased by approximately 50% compared with ApoE(-/-). However, the cellular composition and extracellular matrix of the plaques did not differ. Surprisingly, we found significant activity and expression of CD73 in the plaque of ApoE(-/-) mice which increased over time. CD73 co-localized with macrophages, Tregs, and cells of mesenchymal origin. Genome-wide microarray analysis of the aorta lacking CD73 revealed upregulation of endothelin-1 (Edn1) mRNA together with changes of genes in lipid metabolism and the Wnt and nuclear factor kappa B pathways. Measurement of plasma levels verified the upregulation of Edn1 in CD73(-/-) and double mutants. Plasma triglycerides (TG) were also found to be significantly elevated in the CD73(-/-)/ApoE(-/-) mice compared with ApoE(-/-) controls. CONCLUSION: Lack of CD73 promotes atherogenesis most likely by de-inhibition of resident macrophages and T cells. Elevated Edn1 and TG levels may have contributed. This establishes CD73-derived adenosine as a direct or indirect regulator of atherogenesis. |
