alexa Parasiticidal activity of human alpha-defensin-5 against Toxoplasma gondii.
Microbiology

Microbiology

Journal of Microbial & Biochemical Technology

Author(s): Tanaka T, Rahman MM, Battur B, Boldbaatar D, Liao M,

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Abstract Human defensins play a fundamental role in the initiation of innate immune responses to some microbial pathogens. In this paper, we show that human alpha-defensin-5 displays a parasiticidal role against Toxoplasma gondii, the causative agent of toxoplasmosis. Exposure of the tachyzoite form of T. gondii to defensin induced aggregation and significantly reduced parasite viability in a concentration-dependent peptide. Pre-incubation of tachyzoites with human alpha-defensin-5 followed by exposure to a mouse embryonal cell line (NIH/3T3) significantly reduced T. gondii infection in these cells. Thus, human alpha-defensin-5 is an innate immune molecule that causes severe toxocity to T. gondii and plays an important role in reducing cellular infection. This is the first report showing that human alpha-defensin-5 causes aggregation, leading to Toxoplasma destruction. This article was published in In Vitro Cell Dev Biol Anim and referenced in Journal of Microbial & Biochemical Technology

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