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Published on: January 28, 2020
Biochemical markers for cardiovascular risk following treatment in endogenous Cushing's syndrome
1Section of Endocrinology, Research Institute of Internal Medicine, University of Oslo, Oslo, Norway. cybele.kristo@rikshospitalet.no
Insights
This study investigated inflammation markers in Cushing's syndrome (CS) patients, finding elevated interleukin-8 and osteoprotegerin levels that decreased post-surgery, suggesting a complex role in cardiovascular disease risk.
Area of Science:
- Endocrinology
- Cardiovascular Medicine
- Immunology
Background:
- Cardiovascular disease (CVD) is more prevalent in Cushing's syndrome (CS) patients.
- Inflammation is implicated in atherogenesis, but its role in CS-associated CVD is unclear.
- This study aimed to clarify the role of inflammation in CS by measuring inflammatory markers.
Purpose of the Study:
- To assess inflammatory markers in patients with endogenous Cushing's syndrome.
- To evaluate changes in these markers after surgical treatment and potential cure.
- To understand the link between inflammation and cardiovascular risk in CS.
Main Methods:
- Twenty-eight CS patients were studied at baseline and post-surgery.
- Twenty-one patients were followed longitudinally for a mean of 33 months.
- Twenty-four healthy individuals served as controls.
Main Results:
- Interleukin-8 (IL-8) and osteoprotegerin (OPG) were elevated in CS patients pre-operatively and decreased post-surgery.
- C-reactive protein (CRP) and soluble intercellular adhesion molecule 1 (sICAM) were decreased at baseline and normalized post-surgery.
- Soluble CD40 ligand, a marker of platelet-mediated inflammation, was elevated during follow-up.
Conclusions:
- Cushing's syndrome exhibits a complex interaction with inflammation.
- Elevated IL-8 and OPG in CS patients may indicate an inflammatory and pro-atherogenic phenotype.
- Further research is needed to clarify the clinical significance of these inflammatory findings.
Objective:
Cardiovascular disease has been reported to be more common in patients with endogenous Cushing's syndrome (CS) compared to the normal population. In addition to altered lipid profile, inflammation seems to play an important pathogenic role in atherogenesis, but the role of inflammation in CS-associated cardiovascular disease is still not clear. To further elucidate these issues we measured several markers of inflammation in CS patients at baseline and following operative treatment and potential cure.
Subjects:
Twenty-eight CS patients (22 women, 6 men) were included in the study and 21 of these patients (15 women, 6 men) were also followed longitudinally for a mean 33 months (range 5-69 months) after operative treatment. For comparison, blood samples were also collected from 24 healthy controls (21 women, 3 men).
Results:
We show a distinct cytokine profile in CS patients before and after operative treatment. Thus, while interleukin (IL)-8 and osteoprotegerin (OPG) were significantly increased in CS patients before operation and fell during follow-up, levels of C-reactive protein (CRP) and soluble intracellular adhesion molecule 1 (sICAM) were significantly decreased at baseline, reaching normal levels after operation. While soluble CD40 ligand was within normal limit at baseline, this marker of platelet-mediated inflammation was markedly elevated during follow-up.
Conclusions:
Our findings suggest a complex interaction between CS and inflammation. In particular, the raised levels of IL-8 and OPG in CS patients, despite glucocorticoid excess, may represent an inflammatory and pro-atherogenic phenotype. However, the clinical relevance of these findings will have to be clarified.
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