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NCT Number: NCT05562687

Association Between Some Polymorphisms in Apelin/ Apelin Receptor Genes and Coronary Artery Disease in Syrian Patients

The apelin-APJ signaling pathway has emerged as an important novel mediator of cardiovascular control and blood pressure homeostasis. Genetic variation in apelin and its receptors likely contributes to essential hypertension, in addition to a range of traditional risk factors. Thus, a study will be conducted on Syrian patients with hypertension and coronary artery disease to investigate some of the single polymorphisms in the apelin gene and its receptor that may be responsible for the development of these diseases, and to link the levels of this peptide and its receptor in the blood with these polymorphisms and the percentage of these diseases (as shown by many Modern Global Reference Studies).

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Key information

Conditions

Coronary Artery Disease Arterial Occlusive Diseases Arteriosclerosis Cardiovascular Diseases Coronary Disease Heart Diseases Hypertension Myocardial Ischemia Vascular Diseases

Age range

30 year–78 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Damascus University- Faculty of Pharmacy- Research and Graduate Studies Laboratory

Damascus, 011, Syria

About this study

Blood levels of apelin and its receptor will be determined in patients and controls, and correlated with hypertension and coronary artery disease. And the allelic and genotypic frequencies of the G212A single polymorphism nucleotide of the apelin receptor gene and the -1860T>C single polymorphism nucleotide of the apelin gene in the study groups. And evaluation the functional role of A allele in hypertension. As well as investigating the association between: the genotypes of the apelin gene and the levels of apelin in the plasma, the genotypes of the apelin receptor gene and the levels of APJ in the plasma in the study groups. And link the polymorphism of the apelin gene with the polymorphism of the apelin receptor gene. And to determine the correlation between the presence of the studied SNPs and some traditional risk factors for coronary artery disease, which are age, hypertension, the onset age of hypertension, smoking, BMI, cholesterol and triglyceride levels in the blood, and family history of CAD.

Who can participate

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Control group: the subjects were characterized by no history of angina and other heart disease or hypertension, and do not have other chronic or inflammatory diseases.

They represent a normal resting ECG and normal exercise ECG stress testing. And the angiography showed the absence of any stenosis of the coronary arteries.

They were matched with CAD patients according to age, gender and ethnicity.

  • CAD group with essential hypertension: the subjects were characterized by at least 70% stenosis in any coronary artery and high blood pressure (the average of three blood pressure readings was at least 140 mmHg systolic or 90 mmHg diastolic).
  • CAD group without essential hypertension: the subjects were characterized by at least 70% stenosis in any coronary artery and normal blood pressure.
  • Hypertension group without CAD: the subjects were characterized by the normal coronary artery and high blood pressure. And they were characterized by no history of angina and other heart disease or hypertension, and do not have other chronic or inflammatory diseases.

Exclusion criteria

  • Individuals with valvular heart disease, cardiomyopathy, chronic kidney disease, diabetes, and inflammatory disease were excluded

Treatment and study plan

Primary outcomes

  1. Blood apelin concentrations

    Time frame: Collecting blood samples before angiography

    Blood samples will be obtained after a 10-h overnight fast before angiography and centrifuged at 1000 g for 10 min, then plasma specimens were stored at -80°C until analysis.

  2. Blood apelin receptor (APJ) concentrations

    Time frame: Collecting blood samples before angiography

    Blood samples will be obtained after a 10-h overnight fast before angiography and centrifuged at 1000 g for 10 min, then plasma specimens were stored at -80°C until analysis

  3. The allelic and genotypic frequencies of the -1860T>C single polymorphism nucleotides of the apelin genes

    Time frame: Collecting blood samples before angiography

    Genomic DNA will be extracted from peripheral blood sample, after that DNA will be stored in a deep freezer (-80°C) until the genetic analysis

  4. The allelic and genotypic frequencies of the G212A single polymorphism nucleotides of the apelin receptor genes

    Time frame: Collecting blood samples before angiography

    Genomic DNA will be extracted from peripheral blood sample, after that DNA will be stored in a deep freezer (-80°C) until the genetic analysis.

Secondary outcomes

  1. BMI

    Time frame: before angiography

    measurement of body weight and height will be recorded to calculate the body mass index

  2. Measurement of blood pressure

    Time frame: before angiography

    Hypertension was diagnosed when the average of three blood pressure readings was at least 140 mmHg systolic or 90 mmHg diastolic, or in the event the individuals were taking antihypertensive medication

  3. Plasma levels of triglycerides (TG)

    Time frame: Collecting blood samples before angiography

    Blood samples will be obtained after a 10-h overnight fast before angiography and centrifuged at 3000 g for 10 min, then plasma specimens were stored at -80°C until analysis

  4. total cholesterol (TC) levels in plasma

    Time frame: Collecting blood samples before angiography

    Blood samples will be obtained after a 10-h overnight fast before angiography and centrifuged at 3000 g for 10 min, then plasma specimens were stored at -80°C until analysis

  5. high-density lipoprotein cholesterol (HDL-C) levels in plasma

    Time frame: Collecting blood samples before angiography

    Blood samples will be obtained after a 10-h overnight fast before angiography and centrifuged at 3000 g for 10 min, then plasma specimens were stored at -80°C until analysis

  6. low-density lipoprotein cholesterol (LDL-C)

    Time frame: Collecting blood samples before angiography

    Blood samples will be obtained after a 10-h overnight fast before angiography and centrifuged at 3000 g for 10 min, then plasma specimens were stored at -80°C until analysis

Sponsors and collaborators

Lead sponsor

Damascus University

Other

Registry information

Official study title

Investigation of Association Between Single Nucleotide Polymorphisms in Genes of the Apelin/ APJ System (-1860T>C & G212A) and CAD Risk and Hypertension in Syrian Patients

Important dates

Study start
2019
Primary completion
2022
Study completion
2022
First posted
Oct 3, 2022
Registry last updated
Apr 1, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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