Bioguided Fractionation and Purification of Natural Bioactives Obtained from<i>Alpinia conchigera</i> Water Extract with Melanin Inhibition Activity
- 1 Natural Product and Cosmetics Program, SIRIM Bhd. No. 1, Persiaran Dato Menteri, Shah Alam, Malaysia;
- 2 Natural Product and Cosmetics Program, SIRIM Bhd. No. 1, Persiaran Dato Menteri, Shah Alam, Malaysia;
- 3 Natural Product and Cosmetics Program, SIRIM Bhd. No. 1, Persiaran Dato Menteri, Shah Alam, Malaysia;
- 4 Natural Product and Cosmetics Program, SIRIM Bhd. No. 1, Persiaran Dato Menteri, Shah Alam, Malaysia;
- 5 Natural Product and Cosmetics Program, SIRIM Bhd. No. 1, Persiaran Dato Menteri, Shah Alam, Malaysia;
- 6 Industrial Biotechnol- ogy Research Centre, SIRIM Bhd. No. 1, Persiaran Dato Menteri, Shah Alam, Malaysia;
- 7 3Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia; Sime Darby Technology Centre Sdn. Bhd., UPM-MTDC Technology Centre III, Universiti Putra Malaysia, Serdang, Malaysia.
Abstract
Crude extracts of Alpinia conchigera a species from the Malaysian Ginger (Zingiberaceae) family and its fractions ob tained from various extraction methods were assayed for melanogenesis inhibition activity and cell viability. The crude extract obtained from the ethanolic extraction and the super critical fluid extraction did not exhibit significant melanin inhibition activity and was shown to be toxic to the melanocyte cells in comparison to the water extract. The crude aqueous extracts displayed melanin inhibition of 96.38 ± 1.60% and cell viability 109.90 ± 8.32% at a concentration of 5 00 μg/m L . Bioassay guided fractionation was performed on the water extracts to isolate the active compounds. The actives were identified as trans-cinnamaldehyde and chavicol glucopyranoside with both compound showing potent anti-melanogenesis activity. At 4.9 μg/ml, both trans-cinnamaldehyde and chavicol glucopyranoside gave 85% inhibi tion of melanin formation in vitro with 77% and 97% cell viability respectively. In comparison, kojic acid, a known skin lightening agent showed 90.0% inhibition at 100 μg/mL. The bioactive composition comprising the extract, active fraction, purified compounds or mixture thereof of Alpinia conchigera may be used for cosmetic and pharmaceutical applications, particularly for the purposes of reducing skin pigmentation.
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