Abstract
The plant allelochemical l-mimosine (β-[N-(3-hydroxy-4-pyridone)]-α-aminopropionic acid; leucenol) resembles the nonessential amino acid, tyrosine. Because the obligate intracellular alphaproteobacterium, Wolbachia pipientis, metabolizes amino acids derived from host cells, the effects of mimosine on infected and uninfected mosquito cells were investigated. The EC50 for mimosine was 6–7 μM with Aedes albopictus C7-10 and C/wStr cell lines, and was not influenced by infection status. Mosquito cells responded to concentrations of mimosine substantially lower than those used to synchronize the mammalian cell cycle; at concentrations of 30–35 μM, mimosine reversibly arrested the mosquito cell cycle at the G1/S boundary and inhibited growth of Wolbachia strain wStr. Although lower concentrations of mimosine slightly increased wStr abundance, concentrations that suppressed the cell cycle reduced Wolbachia levels.
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This work was supported by NIH grant AI 081322 and by the University of Minnesota Agricultural Experiment Station, St. Paul, MN.
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Editor: T. Okamoto
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Fallon, A.M. Effects of mimosine on Wolbachia in mosquito cells: cell cycle suppression reduces bacterial abundance. In Vitro Cell.Dev.Biol.-Animal 51, 958–963 (2015). https://doi.org/10.1007/s11626-015-9918-7
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DOI: https://doi.org/10.1007/s11626-015-9918-7