Apelin Levels In Isolated Coronary Artery Ectasia
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Updated: Apr 2, 2026

Isolation of Endocardial and Coronary Endothelial Cells from the Ventricular Free Wall of the Rat Heart
Published on: April 15, 2020
Mehmet Zihni Bilik1, İbrahim Kaplan2, Abdulkadir Yıldız1
1Department of Cardiology, Medicine Faculty, Dicle University, Diyarbakır, Turkey.
Insights
Plasma apelin levels are significantly lower in patients with isolated coronary artery ectasia (CAE). This study identified a novel relationship between apelin and CAE, suggesting a potential role in its nonatherosclerotic mechanism.
Area of Science:
- Cardiology
- Biochemistry
Background:
- The exact causes of coronary artery ectasia (CAE) remain unclear.
- While often linked to atherosclerosis, isolated CAE involves nonatherosclerotic pathways.
- Previous research explored apelin's role in atherosclerotic coronary artery disease, but its function in isolated CAE was unexamined.
Purpose of the Study:
- To investigate the relationship between plasma apelin levels and isolated coronary artery ectasia (CAE).
- To determine if apelin levels differ between patients with isolated CAE and healthy controls.
Main Methods:
- A total of 54 participants were included: 26 with isolated CAE and 28 healthy controls.
- Demographic and risk factor profiles were similar between groups.
- Plasma apelin levels were quantified using an enzyme-linked immunoassay kit.
Main Results:
- Patients with isolated CAE exhibited significantly lower plasma apelin levels (0.181±0.159 ng/mL) compared to the control group (0.646±0.578 ng/mL).
- The difference in apelin levels between the groups was statistically significant (p=0.033).
- No significant differences were observed in glucose, creatinine, total cholesterol, triglyceride, LDL-C, or HDL-C levels between the groups.
Conclusions:
- This study demonstrates that individuals with isolated coronary artery ectasia have reduced plasma apelin levels.
- A significant association between plasma apelin and isolated CAE was established.
- These findings suggest apelin may play a role in the pathogenesis of isolated CAE.
Background And Objectives:
The etiopathogenesis of coronary artery ectasia (CAE) is not known completely. In most of the cases, CAE is associated with atherosclerosis; however, isolated CAE has a nonatherosclerotic mechanism. The association between atherosclerotic coronary artery disease and apelin has been examined in previous studies. However, the role of plasma apelin in isolated coronary artery ectasia has not been studied. In this study, we investigated the relationship between plasma apelin levels and isolated coronary artery ectasia.
Subjects And Methods:
The study population included a total of 54 patients. Twenty-six patients had isolated CAE (53.6±8.1 years); 28 patients with normal coronary arteries (51.6±8.8 years) and with similar risk factors and demographic characteristics served as the control group. Apelin levels were measured using an enzyme-linked immunoassay kit.
Results:
Apelin level in the CAE group was significantly lower (apelin=0.181±0.159 ng/mL) than that in the control group (apelin=0.646±0.578 ng/mL) (p=0.033). Glucose, creatinine, total cholesterol, triglyceride, low density lipoprotein cholesterol, and high density lipoprotein cholesterol levels were not significantly different between the two groups.
Conclusion:
In this study, we showed that patients with isolated CAE have decreased plasma apelin levels compared with the control group. Based on the data, a relationship between plasma apelin and isolated CAE was determined.
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