Abstract:
The purpose of this research was to compare bioactive compound of bark extracts from Pinus merkusii and Pinus kesiya prepared by 4 solvents (DI water, 50% Ethanol, 95% Ethanol and Acetone). The highest extractable yields were found in 50% Ethanol extract from bark of P. merkusii and P. kesiya (19.3 ± 0.03% and 2.2 ± 0.04% respectively). Phenolic and proanthocyanidin content of 1,575.46 ± 37.45 mg GAE/g extract and 466.41 ± 17.47 mg CE/g extract were obtained from P. kesiya using 95% ethanol as solvent. It also provided the highest antioxidant activity assayed by DPPH and FRAP of IC50 0.53 ± 0.00 µg/ml and 863.70 ± 39.89 mg TEAC/g extract, respectively. However, the highest tyrosinase inhibitory activity was found in the acetone extract of bark from P. merkusii and P.kesiya (52.27 ± 0.40 and 59.38 ± 0.00 mg KE/g). The extract from P. merkusii bark at the concentrations of 0 50 µg/ml and the extract from P. kesiya bark at the concentrations of 0 20 µg/ml were not cytotoxic to the keratinocyte and fibroblast. Moreover, both of P. merkusii and P. kesiya were good sources of natural anti-inflammatory and cell proliferation agents.
The result suggested that the extract of pine bark (especially Pinus Kesiya) may be used as natural active ingredient in cosmetics.