Association of plasma leptin, homocysteine and nitric oxide levels with the presence and unstability of coronary artery disease.
OBJECTIVE
Leptin and total homocysteine (tHcy) may participate in the pathogenesis of coronary artery disease (CAD) through nitric oxide (NO) depletion. We sought to investigate whether leptin, tHcy and NO are suitable predictors of CAD.


METHODS
This study contained 50 control subjects and 50 stable and 50 unstable angina patients. Plasma leptin, tHcy and NO levels were determined using enzyme immunoassay, HPLC fluorescence and spectrophotometric methods, respectively. Other conventional risk factors were also determined.


RESULTS
Leptin and tHcy levels were highest in unstable angina patients, followed by stable angina patients and then controls (p < 0.001). Controls had significantly higher NO than patients (p <0.001). Leptin and tHcy had a positive and NO a negative association with the presence of CAD.


CONCLUSIONS
Some athrogenic effects of leptin may be mediated by affecting tHcy and NO levels. Plasma leptin, tHcy and NO levels showed significant contribution to CAD prediction and discrimination.
Department of Clinical Biochemistry, Faculty of Allied Medical Sciences, Ilam University of Medical Sciences, Ilam, Iran.
Gholam
G
Basati
Amirnader Emami
AE
Razavi
Soheila
S
Abdi
Nizal
N
Sarrafzedegan
Nisal
N
Sarrafzedegan
D000368:Aged; D060050:Angina, Stable / Q000097:blood / Q000150:complications / Q000175:diagnosis; D000789:Angina, Unstable / Q000097:blood / Q000150:complications / Q000175:diagnosis; D002851:Chromatography, High Pressure Liquid; D003324:Coronary Artery Disease / Q000097:blood* / Q000209:etiology*; D005260:Female; D006710:Homocysteine / Q000097:blood*; D006801:Humans; D007124:Immunoenzyme Techniques; D020738:Leptin / Q000097:blood*; D008297:Male; D008875:Middle Aged; D009569:Nitric Oxide / Q000097:blood*; D016017:Odds Ratio; D012372:ROC Curve; D012307:Risk Factors; D013050:Spectrometry, Fluorescence
D020738:Leptin; D006710:Homocysteine; D009569:Nitric Oxide