Curcuma longa ethanol extract and Curcumin inhibit the growth of Acanthamoeba triangularis trophozoites and cysts isolated from water reservoirs at Walailak University, Thailand
authors Mitsuwan, W; Bunsuwansakul, C; Leonard, TE; Laohaprapanon, S; Hounkong, K; Bunluepuech, K; Chalermpol, K; Mahboob, T; Raju, CS; Dhobi, M; Pereira, MD; Mohammad, N; Wiart, C; Siyadatpanah, A; Norouzi, R; Nissapatorn, V
nationality International
author keywords Acanthamoeba triangularis; anti-Acanthamoeba activity; Curcuma longa extract; Curcumin; Cysts; Trophozoites
abstract Curcuma longa (C. longa) rhizome extract has been traditionally used to treat many infections. Curcumin, a pure compound isolated from the plant, has been documented to possess a wide spectrum of pharmacological effects. The present study aimed to investigate the effects of Thai medicinal plant extracts including C. longa extract and Curcumin on Acanthamoeba triangularis, a causative agent of human Acanthamoeba keratitis. The parasite was isolated from the recreational reservoir at Walailak University, Thailand. The organism was identified as A. triangularis using morphology and 18S rDNA nucleotide sequences. The pathogen was tested for their susceptibility to ethanol extracts of Thai medicinal plants based on eye infection treatment. The ethanol C. longa extract showed the strongest anti-Acanthamoeba activity against both the trophozoites and cysts, followed by Coscinium fenestratum, Coccinia grandis, and Acmella oleracea extracts, respectively. After 24 h, 95% reduction of trophozoite viability was significantly decreased following the treatment with C. longa extract at 125 mu g/mL, compared with the control (P < 0.05). The extract at 1,000 mu g/mL inhibited 90% viability of Acanthamoeba cyst within 24 h, compared with the control. It was found that the cysts treated with C. longa extract at 500 mu g/mL demonstrated abnormal shape after 24 h. The MIC values of C. longa extract and Curcumin against the trophozoites were 125 and 62.5 mu g/mL, respectively. While MICs of the extract and curcumin against the cysts were 500 and 1,000 mu g/mL, respectively. The results suggested the potential medicinal benefits of C. longa extract and Curcumin as the alternative treatment of Acanthamoeba infections.
issn 2047-7724
isbn 2047-7732
year published 2020
volume 114
issue 4
beginning page 194
ending page 204
digital object identifier (doi) 10.1080/20477724.2020.1755551
web of science category Public, Environmental & Occupational Health; Parasitology; Tropical Medicine
subject category Public, Environmental & Occupational Health; Parasitology; Tropical Medicine
unique article identifier WOS:000528180400001
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