Genetic analysis of mefloquine-resistant mechanism of Plasmodium falciparum.

Yuko Nishiyama, Yohei Okuda, Hye Sook Kim, Takahisa Huruta, Mikio Kimura, Yusuke Wataya

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We studied DNA sequence polymorphism, expression level of pfmdr1 gene and sensitivity of major antimalarial drugs in both mefloquine sensitive and resistant strains to elucidate mechanism of mefloquine resistance. Mefloquine-resistant 523a R/24 strain exhibited decreased susceptibility to mefloquine, artemisinin and halofantrine whereas increased susceptibility to chloroquine. We found a novel point mutation in pfmdr1 gene of 523a R/24 strain. Moreover, overexpression of mRNA of pfmdr1 has been observed in this strain. In addition, functional analysis by pfmdr1 antisense revealed correlation of mefloquine sensitivity with expression level of pfmdr1. We suggest that gene mutation and overexpression of pfmdr1 may be associated with mechanism of mefloquine resistance.

Original languageEnglish
Pages (from-to)163-164
Number of pages2
JournalNucleic acids symposium series (2004)
Issue number48
Publication statusPublished - 2004

ASJC Scopus subject areas

  • Medicine(all)


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