Research articles
ScienceAsia (): 163-168 |doi:
10.2306/scienceasia1513-1874...163
Phenotype-based screening of selected mangrove methanolic crude extracts with anti-melanogenic activity using zebrafish (Danioÿrerio) as a model
MarkÿAndreÿC.ÿGrisola, RollyÿG.ÿFuentes*
ABSTRACT: Novel skin hypopigmenting agents are important due to the unwanted side effects of existing therapies and treatments. In this study, the melanogenic effects of crude extracts of selected mangroves, namely, Avicennia marina, Excoecaria agallocha, Rhizophora apiculata, and Sonneratia alba were screened using zebrafish as a model organism. During the screening process, 50ÿµg/ml and 100ÿµg/ml concentrations of the extracts were applied to the zebrafish embryos at 9ÿh post fertilization and effects were observed at 55ÿh post fertilization. Among the extracts, S.ÿalba bark extract displayed the best results in terms of its effect on melanogenesis and toxicity. It was further investigated and was found to have a dose-dependent effect on the pigmentation of embryos. Higher dosages of S.ÿalba bark extract such as 400ÿµg/ml and 500ÿµg/ml caused profound effects on embryo melanogenesis. ImageJ analysis revealed that higher dosages remarkably decreased the ocular melanin content of the embryos. Results suggest that S.ÿalba is a potent source of compounds with anti-melanogenic properties.
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| DivisionÿofÿNaturalÿSciencesÿandÿMathematics, UniversityÿofÿtheÿPhilippinesÿVisayasÿTaclobanÿCollege, 6500ÿTaclobanÿCity, Philippines |
* Corresponding author, E-mail: rgfuentes@up.edu.ph
Received 5 Mar 2016, Accepted 2 Jul 2017
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