No relation between angiotensin-converting enzyme gene polymorphism and smoking dependence

Area of Science:

• Genetics
• Cardiovascular Disease Research
• Oncology

Background:

• Smoking is a significant risk factor for cancer and cardiovascular disease.
• Genetic factors are believed to contribute to smoking susceptibility.
• The angiotensin-converting enzyme (ACE) gene is a candidate for genetic influence on smoking behavior.

Purpose of the Study:

• To investigate the association between the ACE gene's insertion/deletion (I/D) polymorphism and smoking status.
• To determine if ACE I/D polymorphism correlates with the number of cigarettes smoked weekly.

Main Methods:

• Polymerase chain reaction (PCR) was used to genotype the ACE I/D polymorphism.
• The study included 1204 males and 1375 females from a representative Caucasian population.
• Smoking status and weekly cigarette consumption were assessed via questionnaire.

Main Results:

• Allele and genotype frequencies of the ACE I/D polymorphism showed no significant differences between smokers, past smokers, and never-smokers.
• No association was observed between ACE I/D polymorphism and the number of cigarettes smoked per week in either males or females.

Conclusions:

• The insertion/deletion (I/D) polymorphism in the ACE gene is not implicated in the genetic predisposition to smoking.
• These findings indicate that ACE I/D polymorphism does not play a role in determining smoking behavior or susceptibility.