| Title |
Mutual amplification of corticosteroids and angiotensin systems in human vascular smooth muscle cells and carotid atheroma
|
|---|---|
| Published in |
Journal of Molecular Medicine, August 2014
|
| DOI | 10.1007/s00109-014-1193-7 |
| Pubmed ID | |
| Authors |
Hanène Ayari, Liliana Legedz, Catherine Cerutti, Pierre Lantelme, Patrick Feugier, Marie-Paule Gustin, Olivier Lohez, Ali Nehme, Jacques Yuan Li, Jouda Gharbi-Chihi, Giampiero Bricca |
| Abstract |
The involvement of the renin-angiotensin-aldosterone system (RAAS) and cortisol in increased cardiovascular risk is well known. If numerous relationships between RAAS and corticosteroids have been described, their interactions within the arterial wall, especially during the transdifferentiation of vascular smooth muscle cells (VSMCs) and the atheroma formation, are not established. Here, we clarified the relationships between mRNA levels of corticosteroid and angiotensin system components using cortisol, fludrocortisone, and angiotensin II treatments of cultured VSMCs maintained in a contractile phenotype or induced to a lipid storing phenotype. We then determined the quantitative relationships between the mRNA content of these components measured with reverse transcription polymerase chain reaction (RT-PCR), in the atheroma plaque and nearby macroscopically intact tissue (MIT) from 27 human carotid endarterectomy samples. In both VSMC phenotypes, cortisol markedly increased both angiotensinogen (AGT) and AT1-receptor (AT1R) mRNA levels. These effects of cortisol were mediated via glucocorticoid receptor-α (GRα) without any illicit activation of the mineralocorticoid receptor (MR). Angiotensin II increased GRα, 11βHSD1, CYP11B1, as well as CYP11B2 mRNAs and decreased AT1R in contractile VSMC; only GRα and CYP11B2 were increased in lipid storing VSMCs, while MR and AGT mRNAs decreased. In endarterectomy specimens, positive correlations between mRNA levels of AGT and aldosterone synthase or 11βHSD1 in MIT and of AT1R and MR in atheroma were detected. The arterial tissue angiotensin system is a target for local glucocorticoids and arterial glucocorticoids for angiotensin II. Both systems appear activated in lipid storing VSMCs and strongly correlated in vivo, and their mutual amplification may contribute to the development of atheroma. |
X Demographics
The data shown below were collected from the profiles of 3 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 2 | 67% |
| Australia | 1 | 33% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 3 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 15 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 15 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 4 | 27% |
| Student > Ph. D. Student | 2 | 13% |
| Student > Doctoral Student | 2 | 13% |
| Student > Bachelor | 1 | 7% |
| Unknown | 6 | 40% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 5 | 33% |
| Pharmacology, Toxicology and Pharmaceutical Science | 3 | 20% |
| Sports and Recreations | 1 | 7% |
| Biochemistry, Genetics and Molecular Biology | 1 | 7% |
| Unknown | 5 | 33% |
Attention Score in Context
This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 06 August 2022.
All research outputs
#14,979,439
of 23,041,514 outputs
Outputs from Journal of Molecular Medicine
#1,102
of 1,554 outputs
Outputs of similar age
#127,537
of 230,884 outputs
Outputs of similar age from Journal of Molecular Medicine
#14
of 17 outputs
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