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Variable number of tandem repeats of 9 Plasmodium vivax genes among Southeast Asian isolates
Wang, B.,Nyunt, M.H.,Yun, S.G.,Lu, F.,Cheng, Y.,Han, J.H.,Ha, K.S.,Park, W.S.,Hong, S.H.,Lim, C.S.,Cao, J.,Sattabongkot, J.,Kyaw, M.P.,Cui, L.,Han, E.T. Verlag fur Recht und Gesellschaft 2017 Acta tropica Vol.170 No.-
<P>The variable number of tandem repeats (VNTRs) provides valuable information about both the functional and evolutionary aspects of genetic diversity. Comparative analysis of 3 Plasmodium falciparum genomes has shown that more than 9% of its open reading frames (ORFs) harbor VNTRs. Although microsatellites and VNTR genes of P. vivax were reported, the VNTR polymorphism of genes has not been examined widely. In this study, 230 P. vivax genes were analyzed for VNTRs by SERV, and 33 kinds of TR deletions or insertions from 29P. vivax genes (12.6%) were found. Of these, 9 VNTR fragments from 8 P. vivax genes were used for PCR amplification and sequence analysis to examine the genetic diversity among 134 isolates from four Southeast Asian countries (China, Republic of Korea, Thailand, and Myanmar) with different malaria endemicity. We confirmed the existence of extensive polymorphism of VNTR fragments in field isolates. This detection provides several suitable markers for analysis of the molecular epidemiology of P. vivax field isolates. (C) 2017 Elsevier B.V. All rights reserved.</P>