Analysis of methionine synthase (rs1805087) gene polymorphism in autism patients in Northern Iran

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Acta Neurobiologiae Experimentalis

Nencki Institute of Experimental Biology

Polish Neuroscience Society

Subject: Behavioral Sciences , Biomedical Sciences & Nutrition , Life Sciences , Medicine , Neurosciences

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ISSN: 0065-1400
eISSN: 1689-0035

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VOLUME 76 , ISSUE 4 (December 2016) > List of articles

Advertisement Analysis of methionine synthase (rs1805087) gene polymorphism in autism patients in Northern Iran

Rosa Haghiri / Farhad Mashayekhi * / Elham Bidabadi / Zivar Salehi

Keywords : autism, MTR A2756G, gene polymorphism, PCR‑RFLP

Citation Information : Acta Neurobiologiae Experimentalis. VOLUME 76 , ISSUE 4 , ISSN (Online) 1689-0035, DOI: 10.21307/ane-2017-030, December 2016

License : (CC BY 4.0)

Published Online: 31-July-2017

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ABSTRACT

Autism is characterized by impairment in reciprocal communication and speech, repetitive behaviors, and social communication. The genetic and environmental factors play roles in the pathogenesis of autism. It was recently shown that the genes involved in the folate/homocysteine pathway may be risk factors for autistic children. One of the genes that may be the risk factor for autism is Methionine synthase (MTR). MTR is responsible for the regeneration of methionine from homocysteine. The aim of this study was to analyze the association of MTR A2756G gene polymorphism (rs1805087) and the risk of autism in a population in northern Iran. The prevalence of MTR A2756G polymorphism was determined in 108 children with autism and 130 controls in northern Iran. Genotypes and allele frequencies were determined in patients and controls by polymerase chain reaction‑restriction fragment length polymorphism (PCR‑RFLP). The prevalence of genotype frequencies of AA, AG and GG in autistic children were 57.41%, 22.22% and 20.37%, respectively, while in controls were 61.54%, 32.31% and 6.15%, respectively. There was significant difference between the MTR polymorphism distribution in control and patient groups. The prevalence of allele frequencies of A and G in autistic children were 0.69 and 0.31, respectively and in controls were 0.78 and 0.22, respectively (P=0.03). The MTR G allele conferred a 1.6‑fold increased risk to autism relative to the A allele (95% CI=1.06–2.41, P=0.02). The present study suggests that the G allele of MTR A2756G polymorphism is associated with an increased risk of autism.

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