title: Frequency of paraoxonase 192/55 polymorphism in an Iranian population.
abstract: Paraoxonase (PON1) is a serum enzyme that plays an important role in prevention of atherosclerosis and also protects against organophosphate-induced neurotoxicity. PON1 displays a high variability in human populations. In this study, PON1-192 and -55 polymorphisms and correlation to serum PON1 activity were investigated in 132 healthy Iranian individuals from Isfahan province. The genotype frequencies for PON1-192 were approximately 48% (QQ), 42.% (QR), and 10% (RR) and for PON1-55 17% (MM), 48% (ML), and 35% (LL). Thus, the frequencies of alleles R and L were 0.31 and 0.59, respectively. PON1 activity toward paraoxon was markedly affected in both polymorphic populations in the following order QQ < QR < RR genotype for PON1-192 and MM < ML < LL genotype for PON1-55. Neither polymorphism significantly affected PON1 activity toward phenylacetate. The RR/LL individuals had the highest PON1 activity and QQ/MM individuals the least. The QR/ML haplotype was the most frequent seen in Iranians, and the RR/MM and QR/MM haplotypes were absent in this population. In conclusion, the frequencies of PON1-192 and -55 polymorphisms in this Iranian population were different from those seen in other Asian populations from Japan and China but similar to those for European Caucasians.
authors.affiliation: Institute of Biochemistry and Biophysics, Tehran University, Tehran, Iran.
authors.forename: Farideh
authors.initials: F
authors.lastname: Sepahvand
authors.forename: Parvaneh
authors.initials: P
authors.lastname: Rahimi-Moghaddam
authors.forename: Massoumeh
authors.initials: M
authors.lastname: Shafiei
authors.forename: Seyed Mahmood
authors.initials: SM
authors.lastname: Ghaffari
authors.forename: Mehran
authors.initials: M
authors.lastname: Rostam-Shirazi
authors.forename: Massoud
authors.initials: M
authors.lastname: Mahmoudian
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D043303:Aryldialkylphosphatase / Q000235:genetics* / Q000378:metabolism; D050197:Atherosclerosis / Q000235:genetics; D005260:Female; D005828:Genetics, Population; D005838:Genotype; D006801:Humans; D007492:Iran; D008297:Male; D008875:Middle Aged; D010755:Organophosphates / Q000378:metabolism; D011110:Polymorphism, Genetic
chemical_list: D010755:Organophosphates; D043303:Aryldialkylphosphatase; C468406:PON1 protein, human