A flow cytometry-based quantitative drug sensitivity assay for all plasmodium falciparum gametocyte stages

Zenglei Wang, Min Liu, Xiaoying Liang, Salil Siriwat, Xiaolian Li, Xiaoguang Chen, Daniel M. Parker, Jun Miao, Liwang Cui

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Background: Malaria elimination/eradication campaigns emphasize interruption of parasite transmission as a priority strategy. Screening for new drugs and vaccines against gametocytes is therefore urgently needed. However, current methods for sexual stage drug assays, usually performed by counting or via fluorescent markers are either laborious or restricted to a certain stage. Here we describe the use of a transgenic parasite line for assaying drug sensitivity in all gametocyte stages. Methods: A transgenic parasite line expressing green fluorescence protein (GFP) under the control of the gametocytespecific gene α-tubulin II promoter was generated. This parasite line expresses GFP in all gametocyte stages. Using this transgenic line, we developed a flow cytometry-based assay to determine drug sensitivity of all gametocyte stages, and tested the gametocytocidal activities of four antimalarial drugs. Findings: This assay proved to be suitable for determining drug sensitivity of all sexual stages and can be automated. A Z' factor of 0.7960.02 indicated that this assay could be further optimized for high-throughput screening. The daily sensitivity of gametocytes to three antimalarial drugs (chloroquine, dihydroartemisinin and pyronaridine) showed a drastic decrease from stage III on, whereas it remained relatively steady for primaquine. Conclusions: A drug assay was developed to use a single transgenic parasite line for determining drug susceptibility of all gametocyte stages. This assay may be further automated into a high-throughput platform for screening compound libraries against P. falciparum gametocytes.

Original languageEnglish (US)
Article numbere93825
JournalPloS one
Volume9
Issue number4
DOIs
StatePublished - Apr 15 2014

Fingerprint

gametocytes
Flow cytometry
Plasmodium falciparum
flow cytometry
Assays
Flow Cytometry
Parasites
drugs
assays
Pharmaceutical Preparations
parasites
genetically modified organisms
dihydroartemisinin
teleomorphs
Antimalarials
Screening
antimalarials
screening
Tubulin Modulators
Fluorescence

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

Cite this

Wang, Zenglei ; Liu, Min ; Liang, Xiaoying ; Siriwat, Salil ; Li, Xiaolian ; Chen, Xiaoguang ; Parker, Daniel M. ; Miao, Jun ; Cui, Liwang. / A flow cytometry-based quantitative drug sensitivity assay for all plasmodium falciparum gametocyte stages. In: PloS one. 2014 ; Vol. 9, No. 4.
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abstract = "Background: Malaria elimination/eradication campaigns emphasize interruption of parasite transmission as a priority strategy. Screening for new drugs and vaccines against gametocytes is therefore urgently needed. However, current methods for sexual stage drug assays, usually performed by counting or via fluorescent markers are either laborious or restricted to a certain stage. Here we describe the use of a transgenic parasite line for assaying drug sensitivity in all gametocyte stages. Methods: A transgenic parasite line expressing green fluorescence protein (GFP) under the control of the gametocytespecific gene α-tubulin II promoter was generated. This parasite line expresses GFP in all gametocyte stages. Using this transgenic line, we developed a flow cytometry-based assay to determine drug sensitivity of all gametocyte stages, and tested the gametocytocidal activities of four antimalarial drugs. Findings: This assay proved to be suitable for determining drug sensitivity of all sexual stages and can be automated. A Z' factor of 0.7960.02 indicated that this assay could be further optimized for high-throughput screening. The daily sensitivity of gametocytes to three antimalarial drugs (chloroquine, dihydroartemisinin and pyronaridine) showed a drastic decrease from stage III on, whereas it remained relatively steady for primaquine. Conclusions: A drug assay was developed to use a single transgenic parasite line for determining drug susceptibility of all gametocyte stages. This assay may be further automated into a high-throughput platform for screening compound libraries against P. falciparum gametocytes.",
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Wang, Z, Liu, M, Liang, X, Siriwat, S, Li, X, Chen, X, Parker, DM, Miao, J & Cui, L 2014, 'A flow cytometry-based quantitative drug sensitivity assay for all plasmodium falciparum gametocyte stages', PloS one, vol. 9, no. 4, e93825. https://doi.org/10.1371/journal.pone.0093825

A flow cytometry-based quantitative drug sensitivity assay for all plasmodium falciparum gametocyte stages. / Wang, Zenglei; Liu, Min; Liang, Xiaoying; Siriwat, Salil; Li, Xiaolian; Chen, Xiaoguang; Parker, Daniel M.; Miao, Jun; Cui, Liwang.

In: PloS one, Vol. 9, No. 4, e93825, 15.04.2014.

Research output: Contribution to journalArticle

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AU - Wang, Zenglei

AU - Liu, Min

AU - Liang, Xiaoying

AU - Siriwat, Salil

AU - Li, Xiaolian

AU - Chen, Xiaoguang

AU - Parker, Daniel M.

AU - Miao, Jun

AU - Cui, Liwang

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