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).
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.
Study Type
OBSERVATIONAL
Enrollment
223
Damascus University- Faculty of Pharmacy- Research and Graduate Studies Laboratory
Damascus, Syria
Blood apelin concentrations
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.
Time frame: Collecting blood samples before angiography
Blood apelin receptor (APJ) concentrations
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
Time frame: Collecting blood samples before angiography
The allelic and genotypic frequencies of the -1860T>C single polymorphism nucleotides of the apelin genes
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
Time frame: Collecting blood samples before angiography
The allelic and genotypic frequencies of the G212A single polymorphism nucleotides of the apelin receptor genes
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.
Time frame: Collecting blood samples before angiography
BMI
measurement of body weight and height will be recorded to calculate the body mass index
Time frame: before angiography
Measurement of blood pressure
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
Time frame: before angiography
Plasma levels of triglycerides (TG)
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
Time frame: Collecting blood samples before angiography
total cholesterol (TC) levels in plasma
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
Time frame: Collecting blood samples before angiography
high-density lipoprotein cholesterol (HDL-C) levels in plasma
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
Time frame: Collecting blood samples before angiography
low-density lipoprotein cholesterol (LDL-C)
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
Time frame: Collecting blood samples before angiography
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