Effect of 2, 6-Dichlorobenzonitrile on Amoebicidal Activity of Multipurpose Contact Lens Disinfecting Solutions
10.3347/kjp.2018.56.5.491
- Author:
Eun Kyung MOON
1
;
Seungeun LEE
;
Fu Shi QUAN
;
Hyun Hee KONG
Author Information
1. Department of Medical Zoology, Kyung Hee University School of Medicine, Seoul 02447, Korea.
- Publication Type:Brief Communication
- Keywords:
Acanthamoeba;
amoebicidal effect;
MPDS;
DCB;
cytotoxicity
- MeSH:
Acanthamoeba;
Cellulose;
Disinfection;
Epithelial Cells;
Humans;
In Vitro Techniques
- From:The Korean Journal of Parasitology
2018;56(5):491-494
- CountryRepublic of Korea
- Language:English
-
Abstract:
Multipurpose contact lens disinfecting solutions (MPDS) are widely used to cleanse and disinfect microorganisms. However, disinfection efficacy of these MPDS against Acanthamoeba cyst remain insufficient. 2, 6-dichlorobenzonitrile (DCB), a cellulose synthesis inhibitor, is capable of increasing the amoebical effect against Acanthamoeba by inhibiting its encystation. In this study, we investigated the possibility of DCB as a disinfecting agent to improve the amoebicidal activity of MPDS against Acanthamoeba cyst. Eight commercial MPDS (from a to h) were assessed, all of which displayed insufficient amoebicidal activity against the mature cysts. Solution e, f, and h showed strong amoebicidal effect on the immature cysts. Amoebicidal efficacy against mature cysts remained inadequate even when the 8 MPDS were combined with 100 μM DCB. However, 4 kinds of MPDS (solution d, e, f, and h) including 100 μM DCB demonstrated strong amoebicidal activity against the immature cysts. The amoebicidal activity of solution d was increased by addition of DCB. Cytotoxicity was absent in human corneal epithelial cells treated with either DCB or mixture of DCB with MPDS. These results suggested that DCB can enhance the amoebicical activity of MPDS against Acanthamoeba immature cyst in vitro.
