Relationship Between Heme Oxygenase 1 Enzyme Level and Coronary SYNTAX Score

NCT ID: NCT04070014

Last Updated: 2020-06-22

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 159 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2019-10-01
• Study Completion Date: 2020-03-30

Brief Summary

Aim of this study is to investigate the relationship between heme oxygenase-1 enzyme level and angiographically determined SYNTAX score in patients with suspected stable coronary artery disease. Consecutive patients who are deemed to undergo coronary angiography due to high pre test probability or evidence of cardiac ischemia in imaging studies will be included in the study. Patients with coronary artery bypass surgery history and severe comorbid illnesses such as active malignancy, chronic obstructive lung disease, stage 3-5 chronic renal failure will be excluded. Serum heme oxygenase levels will be measured by ELISA method and SYNTAX score will be calculated from coronary angiography.

Detailed Description

Heme oxygenase-1(HO-1) is an enzyme found throughout the body with highest concentrations in tissues of reticuloendothelial system. It degrades heme to biliverdin and produces ferrous iron and carbon monoxide. It is an inducible anti oxidant enzyme production of which increases during high levels of oxidative stress. Synthesis of HO-1 is regulated mainly on transcriptional level.

Coronary artery disease is characterized by high oxidative stress levels. Initiation of atherosclerosis as well as progression and vulnerable plaque formation are shown to be linked to oxidation-anti oxidation imbalance.

Several studies showed a correlation between heme oxygenase-1 level, activity and coronary artery disease. Measuring heme oxygenase-1 activity from peripheral blood samples is technically challenging. Bilirubin levels are used as a marker of heme oxygenase activity and are showed to be related to coronary artery disease. As previously mentioned HO-1 is an inducible enzyme so the increased levels reveal a high oxidative stress situation. High levels of serum HO-1 are found also in other clinical settings such as interstitial pneumonia, malignancies, acute kidney injury.

Burden of coronary artery disease is highly correlated with adverse prognosis in patients with stable coronary artery disease and acute coronary syndrome. SYNTAX score is a well established tool to determine the extent of coronary artery disease. Severity and location of coronary stenoses as well as calcification and morphology are considered in SYNTAX score. Clinical SYNTAX score also incorporates clinical characteristics of patients including age, creatinine clearance, diabetes etc. High SYNTAX score is associated with increased total and cardiovascular mortality.

The aim of this study is to investigate serum heme oxygenase-1 level and SYNTAX score in patients with suspected coronary artery disease. Patients will be recruited from a single center consecutively. Blood samples will be drawn before coronary angiography. SYNTAX score will be calculated for each patient. Demographical and clinical characteristics of patients will also be recorded. Patients without coronary artery disease will be used as control group. Primary outcome measure will be to determine the relationship between HO-1 levels and SYNTAX score.

Conditions

Coronary Artery Disease; Oxidative Stress

Study Design

• Observational Model Type: CASE_CONTROL
• Study Time Perspective: CROSS_SECTIONAL

Eligibility Criteria

Inclusion Criteria

• Patients with suspected stable coronary artery disease who are deemed to undergo coronary angiographic evaluation

Exclusion Criteria

• Patients with history of coronary bypass or other cardiac surgery
• Patients with acute coronary syndrome
• Patients with severe comorbid illnesses including active malignancies, stage 3-5 chronic renal failure, chronic obstructive lung disease
• Patients with clinically overt infectious or inflammatory diseases
• Patients taking medications that possibly interact with heme metabolism
• patients with hemoglobinopathies

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Yeditepe University Hospital

OTHER

Sponsor Role: lead

Responsible Party

Mustafa Aytek Simsek

Assistant Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Yeditepe University Hospital

Istanbul, , Turkey (Türkiye)

Countries

Turkey (Türkiye)

Other Identifiers

YeditepUH

Identifier Type: -

Identifier Source: org_study_id