Abstract
It is known that low testosterone (T) and high cortisol levels are associated with hypertension as well as with chronic stress, linking stress with elevated blood pressure (BP). However, the association between acute stress-, chronic stress responses and BP is not clear in Africans. Therefore, we examined the association between cortisol, psychological distress and BP responses in low- and high-T male subgroups. Beat-to-beat and ambulatory blood pressure (ABPM) and electrocardiogram measures were obtained. Serum samples were collected and analyzed for sex hormones and cortisol. Chronic psychological distress was verified with the General Health Questionnaire and acute stress with the cold pressor test. More chronic psychological distress was observed in both low- and high-T Africans compared with the Caucasians. The low-T Africans tended to have more ischemic events (P=0.06) and ABPM values (P⩽0.01) than any of the other groups. Both chronic distress (cortisol) and acute stress (total peripheral resistance cold pressor responses) were associated with ABPM in the low-T African group. Acute and chronic stress may contribute to increased BP in low-T African men. Their cortisol and vascular responses supported a tendency for ischemia, increasing their risk for coronary artery disease.
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Acknowledgements
The Sympathetic activity and Ambulatory Blood Pressure in African study is funded by the North-West University, the National Research Foundation (UID 65607), Roche Diagnostics, South Africa, South African Medical Research Council and the Metabolic Syndrome Institute, France. The funders played no role in the design and conduct of the study, collection, management, analysis and interpretation of the data; and preparation, review or approval of the manuscript. The views expressed in this article are those of the authors and not necessarily of the funding bodies.
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NTM had full access to the data, takes responsibility for the integrity of the data and accuracy of the data analyses. All authors contributed to the concept and design of study, drafting and critical revision of the manuscript.
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Malan, N., Stalder, T., Schlaich, M. et al. Chronic distress and acute vascular stress responses associated with ambulatory blood pressure in low-testosterone African men: the SABPA Study. J Hum Hypertens 28, 393–398 (2014). https://doi.org/10.1038/jhh.2013.124
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DOI: https://doi.org/10.1038/jhh.2013.124