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Safety precautions prior to contact lens usage is essential for preventing Acanthamoeba keratitis. Contact lens disinfecting solutions containing 3% hydrogen peroxide (HO) are known to exert amoebicidal effect against Acanthamoeba. Yet, these solutions need to be neutralized to prevent ocular irritation, which consequently may result in incomplete disinfection. In this study, amoebicidal effect of tert-butyl hydroperoxide (tBHP) was investigated and its efficacy was compared to those of hydrogen peroxide (HO). HO and tBHP showed dose dependent amoebicidal effect, however high concentration of these compounds demonstrated cytotoxicity in human corneal epithelial (HCE) cells. To reduce their cytotoxicity, the concentrations of both compounds were diluted to 50 μM and subsequently combined with 10 μM vorinostat to enhance amoebicidal effect. Addition of vorinostat induced high amoebicidal effect against Acanthamoeba trophozoites, even at low concentrations of HO or tBHP. Cellular damage induced by combined treatment of HO or tBHP with vorinostat in Acanthamoeba were determined by assessing cell cycle arrest and apoptosis via FACS analysis. While 50 μM HO combined with 10 μM vorinostat showed 36.26% cytotoxicity on HCE cells during 24 h exposure, 50 μM tBHP with 10 μM vorinostat did not show cytotoxicity on HCE cells. These findings suggest that the application of tBHP and vorinostat for Acanthamoeba keratitis treatment and contact lens disinfection system is highly plausible.
This article was published in the following journal.
Name: Experimental parasitology
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An isomer of butanol that contains a tertiary butyl group that consists of three methyl groups, each separately attached to a central (tertiary) carbon.
A di-tert-butyl PHENOL with antioxidant properties.
Mixture of 2- and 3-tert-butyl-4-methoxyphenols that is used as an antioxidant in foods, cosmetics, and pharmaceuticals.
DITERPENES with three LACTONES and a unique tert-butyl group, which are found in GINKGO plants along with BILOBALIDES.
A degraded form of GINKGOLIDES that have three LACTONES and a unique tert-butyl group which are found in GINKGO plants.