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- Title
Blood pressure and TNF-α act synergistically to increase leucocyte CD11b adhesion molecule expression in the BELFAST study: implications for better blood pressure control in ageing.
- Authors
Rea, I.; McNerlan, Susan; Alexander, Denis; Armstrong, Michelle
- Abstract
Hypertension, a key risk factor for stroke, cardiovascular disease and dementia, is associated with chronic vascular inflammation, and although poorly understood, putative mechanisms include pro-inflammatory responses induced by mechanical stretching, with cytokine release and associated up-regulated expression of adhesion molecules. Because blood pressure increases with age, we measured baseline and tumour necrosis alpha (TNF-α)-stimulated CD11b/CD18 adhesion molecule expression on leucocytes to assess any association between the two. In 38 subjects (mean age 85 years), consecutively enrolled from Belfast Elderly Longitudinal Free-Living Aging Study (BELFAST), baseline and TNF-α-stimulated CD11b/CD18 expression on separated monocytes and neutrophils increased with systolic blood pressure >120 mmHg ( p = 0.05) and for lymphocytes, with diastolic blood pressure >80 mmHg ( p < 0.05).These findings show increased potential stickiness of intravascular cells with increasing blood pressure which is accentuated by TNF-α, and suggest mechanistic reasons why better hypertension control is important.
- Subjects
BLOOD pressure; TUMOR necrosis factors; LEUCOCYTES; SYNERGETICS; CELL adhesion; GENE expression; AGING; INFLAMMATION
- Publication
Age, 2013, Vol 35, Issue 1, p197
- ISSN
0161-9152
- Publication type
Article
- DOI
10.1007/s11357-011-9326-1