Work

Faculty Opinions recommendation of Role of the T cell in the genesis of angiotensin II induced hypertension and vascular dysfunction.

Year: 2007

Type: peer-review

Abstract: Hypertension promotes atherosclerosis and is a major source of morbidity and mortality. We show that mice lacking T and B cells (RAG-1-/- mice) have blunted hypertension and do not develop abnormalities of vascular function during angiotensin II infusion or desoxycorticosterone acetate (DOCA)-salt. Adoptive transfer of T, but not B, cells restored these abnormalities. Angiotensin II is known to stimulate reactive oxygen species production via the nicotinamide adenosine dinucleotide phosphate (NADPH) oxidase in several cells, including some immune cells. Accordingly, adoptive transfer of T cells lacking the angiotensin type I receptor or a functional NADPH oxidase resulted in blunted angiotensin II-dependent hypertension and decreased aortic superoxide production. Angiotensin II increased T cell markers of activation and tissue homing in wild-type, but not NADPH oxidase-deficient, mice. Angiotensin II markedly increased T cells in the perivascular adipose tissue (periadventitial fat) and, to a lesser extent the adventitia. These cells expressed high levels of CC chemokine receptor 5 and were commonly double negative (CD3+CD4-CD8-). This infiltration was associated with an increase in intercellular adhesion molecule-1 and RANTES in the aorta. Hypertension also increased T lymphocyte production of tumor necrosis factor (TNF) alpha, and treatment with the TNFalpha antagonist etanercept prevented the hypertension and increase in vascular superoxide caused by angiotensin II. These studies identify a previously undefined role for T cells in the genesis of hypertension and support a role of inflammation in the basis of this prevalent disease. T cells might represent a novel therapeutic target for the treatment of high blood pressure. PMID: 17875676 Funding information This work was supported by: NEI NIH HHS, United States Grant ID: R01 EY011916 NHLBI NIH HHS, United States Grant ID: HL 63919 NHLBI NIH HHS, United States Grant ID: HL58000 NHLBI NIH HHS, United States Grant ID: P01 HL058000 NHLBI NIH HHS, United States Grant ID: HL59248 NHLBI NIH HHS, United States Grant ID: R01 HL063919 NEI NIH HHS, United States Grant ID: EY 11916 NHLBI NIH HHS, United States Grant ID: HL390006 More Less keyboard_arrow_down

Source: Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature

DOI: 10.3410/f.1092796.549905

Author: Klaus Ley

Institution: La Jolla Institute for Immunology

Language: English

Topic: Renin-Angiotensin System Studies

Subfield: Cardiology and Cardiovascular Medicine

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funders: U.S. Department of Veterans Affairs, National Institutes of Health