ABSTRACT
Association studies between attention-deficit hyperactivity disorder (ADHD) and the 10-repeat allele of a polymorphism (a 40 bp variable number of tandem repeats) in the dopamine transporter gene (DAT1) have resulted in mixed findings in different populations. We performed a case/control study to clarify the contribution of this allele with ADHD in the Iranian population. No association was observed between the 10-allele and disease (chi(2) = 0.081, P < 0.9). Furthermore, no significant difference was observed in the homozygosity of this allele between the case and control groups (chi(2) = 0.022, P < 0.9). Implication of the dopamine transporter gene in the pathophysiology of ADHD warrants investigation of other functional polymorphisms within this gene in the Iranian ADHD patients.
Subject(s)
Alleles , Attention Deficit Disorder with Hyperactivity/genetics , Dopamine Plasma Membrane Transport Proteins/genetics , Adolescent , Attention Deficit Disorder with Hyperactivity/ethnology , Case-Control Studies , Child , Female , Genetic Predisposition to Disease , Humans , Iran , Male , Polymorphism, Genetic , Population Groups/geneticsABSTRACT
BACKGROUND: Tuberculosis is one of the most common infectious diseases in the world. In recent years, genetically approach has been developed. One of the interesting gene for investigator is IFN-gammaR1. AIM: Determination of susceptibility to tuberculosis with polymorphism of IFN-gammaR1 gene. MATERIAL AND METHOD: Study was prospective case-control. Fifty patients with smear positive tuberculosis have been chosen randomly. They were matched with 54 healthy controls with no history of TB. Polymorphism at 395 codon of IFN-gammaR1 gene was detected with Newport method. Data were analysed with SPSS version 11. RESULTS: Mean age of patients and control were 55+/-20 and 53+/-13.5 years, respectively. Demographic characteristic had no difference within two groups. One patient in case group had heterozygote mutation at IFN-gammaR1 gene. In control group there were no mutations. CONCLUSION: Genetically susceptibility to TB is not in 395 colon of IFN-gammaR1 in Iranian TB sample and polymorphism of this loci has occur in 2% of TB patients and 0.96% of total study population.