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Published on: January 28, 2020
Circulating plasma cortisol concentrations are not associated with coronary artery disease or peripheral vascular
R M Reynolds1, B Ilyas, J F Price
1Centre for Cardiovascular Sciences, University of Edinburgh, Queen's Medical Research Institute, Edinburgh, Scotland, UK. R.Reynolds@ed.ac.uk
Insights
Basal cortisol levels do not reliably predict coronary artery disease or peripheral vascular disease. Further research into the hypothalamic-pituitary-adrenal (HPA) axis is needed to understand its role in atherosclerosis.
Area of Science:
- Endocrinology
- Cardiovascular Medicine
- Metabolic Syndrome
Background:
- The obesity epidemic and metabolic syndrome may counteract declining cardiovascular disease (CVD) rates.
- The role of hypothalamic-pituitary-adrenal (HPA) axis activation and circulating cortisol in vascular disease pathogenesis remains unclear.
- Conflicting previous studies highlight the need to differentiate basal cortisol from HPA axis responsiveness.
Purpose of the Study:
- To investigate if basal circulating cortisol levels predict coronary artery disease (CAD) or peripheral vascular disease.
- To assess the association between cortisol levels and vascular disease severity and symptoms.
Main Methods:
- Basal plasma cortisol levels were measured in 278 subjects undergoing coronary angiography for suspected CAD.
- Cortisol levels were also assessed in 76 cases and 85 controls with or without peripheral vascular disease.
Main Results:
- Circulating cortisol levels showed a trend towards being lower in subjects with confirmed coronary vessel disease (P = 0.10) and those requiring intervention (P = 0.07).
- Lower cortisol levels were significantly associated with increased angina symptoms (P = 0.01).
- No significant difference in cortisol levels was observed between subjects with and without peripheral vascular disease.
Conclusions:
- A single measurement of basal circulating cortisol is insufficient for predicting vascular disease.
- Comprehensive characterization of the HPA axis, including its stress responsiveness, is crucial for understanding the role of glucocorticoids in atherosclerosis.
Background:
Although the prevalence of cardiovascular disease is declining, the obesity epidemic with associated metabolic syndrome may reverse this trend. Hypothalamic-pituitary-adrenal (HPA) axis activation may underlie the metabolic syndrome, but whether circulating cortisol levels predict vascular disease is less clear. A recent study reported a positive correlation between cortisol levels measured prior to coronary angiography and disease severity, but others have not demonstrated such a relationship. This may be due to different sampling conditions, reflecting basal cortisol levels, vs. responsiveness of HPA axis activity, which may have diverse influences on the pathogenesis of atherosclerosis.
Aims:
To determine whether basal circulating cortisol levels predict coronary artery (CAD) or peripheral vascular disease.
Methods:
Basal plasma cortisol levels were measured in 278 subjects with suspected CAD, who had undergone elective coronary angiography and in 76 cases and 85 controls with and without peripheral vascular disease, respectively.
Results:
After adjustment for potential confounding factors, circulating cortisol levels tended to be lower in those with confirmed coronary vessel disease at angiography (P = 0.10), and in those requiring intervention following angiography (P = 0.07). Lower cortisol levels also predicted those with more symptoms of angina (P = 0.01). Cortisol levels were no different in those with or without peripheral vascular disease.
Conclusion:
A single measurement of circulating cortisol is a poor predictor of vascular disease. More detailed characterization of the HPA axis is necessary to determine the role of circulating endogenous glucocorticoids and their responsiveness to stress in atherosclerosis.
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