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  • Title: Mutation spectrum of phenylketonuria in Iranian population.
    Author: Zare-Karizi Sh, Hosseini-Mazinani SM, Khazaei-Koohpar Z, Seifati SM, Shahsavan-Behboodi B, Akbari MT, Koochmeshgi J.
    Journal: Mol Genet Metab; 2011 Jan; 102(1):29-32. PubMed ID: 20920871.
    Abstract:
    Identification of molecular basis of phenylketonuria (PKU) in Iran has been accomplished through the analysis of 248 unrelated chromosomes from 124 Iranian classic PKU subjects. Phenylalanine hydroxylase (PAH) gene mutations were analyzed through a combined approach in which p.S67P, p.R252W, p.R261Q, p.R261X, p.L333F, IVS10-11G>A, IVS11+1G>C, p.L364del, p.R408Q and p.R408W mutations were first screened by PCR of PAH gene exons 3, 7, 10, 11 and 12, followed by digestion with the appropriate digestion enzymes. Subsequently SSCP analysis for exons 2, 6, 7 and 11 of the PAH gene and finally, sequencing of 13 PAH gene exons have been used to study uncharacterized PKU chromosomes. 26 different mutations were found. The predominant mutation in this population sample was IVS10-11G>A, with a frequency of 24.6%. Nine mutations (IVS10-11G>A, p.R261Q, p.P281L, IVS11+1G>C, p.K363>NFS, p.R243X, IVS2+5G>C, p.R261X and p.R252W) represent almost 84% of all PKU chromosomes studied. IVS10-11G>A mutation is the major PKU-causing mutation throughout the Mediterranean region. The finding of the high prevalence of this mutation in Iranian population is consistent with the historical and geographical links between Iranian and Mediterranean populations.
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