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TOHRU MITSUNAGA
Faculty of Applied Biological Sciences, Gifu University. 1-1 Yanagido 501-1193 Gifu, Japan
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Diversity of medicinal plants used for skincare by Bulungan tribe in North Kalimantan, Indonesia and its melanin biosynthesis inhibition KARTINA KARTINA; IRMANIDA BATUBARA; HARLINDA KUSPRADINI; IRAWAN WIJAYA KUSUMA; WULAN TRI WAHYUNI; SAAT EGRA; TOHRU MITSUNAGA
Biodiversitas Journal of Biological Diversity Vol. 23 No. 3 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d230308

Abstract

Abstract. Kartina, Batubara I, Kuspradini H, Kusuma IW, Wahyuni WT, Egra S, Matsunaga T. 2022. Diversity of medicinal plants used for skincare by Bulungan tribe in North Kalimantan, Indonesia and its melanin biosynthesis inhibition. Biodiversitas 23: 1246-1253. Indigenous people of the Bulungan tribe in North Kalimantan, Indonesia have been utilizing plants for health purposes, including for skincare such as preventing skin from being dark due to melanin production. This study aimed to evaluate the diversity of medicinal plants utilized by the Bulungan tribe for skincare and determine the melanin biosynthesis inhibition activity. Plants having medicinal uses were investigated through literature studies and interviews with the members of Bulungan tribe in Tanjung Palas Tengah Village. Melanin biosynthesis inhibition was determined by identifying the tyrosinase inhibition potential using commercial tyrosinase enzyme, while intracellular and extracellular melanin biosynthesis production activity was determined using B16 melanoma cells. The results showed at least 19 plant species that have medicinal uses, including for skincare, with some of them having the potential for melanogenesis, both in suppressing and producing melanin. We found a plant sample with melanin suppression potential on B16 melanoma cell, namely Jatropha curcas, at 6.2 µg/ml concentration, which could decrease extracellular melanin content by 18%. Tyrosinase activity with L-tyrosine showed that Cinnamomum burmannii (root) (IC50: 3.4 ?g/mL) showed an insignificant difference with kojic acid, which served as positive control by showing an inhibitory level of (IC50: 0.14 ?g/mL). Based on the data obtained, a pharmacological study is recommended to investigate melanin biosynthesis as a skin whitening agent. We believe that this study can become basic data to discover several active compounds in future studies.
Potential of prospective medicinal plants of Rhizophoraceae from North Kalimantan, Indonesia SAAT EGRA; HARLINDA KUSPRADINI; IRAWAN WIJAYA KUSUMA; IRMANIDA BATUBARA; IMRA IMRA; NURJANNAH NURJANNAH; ETTY WAHYUNI; KOSEI YAMAUCHI; TOHRU MITSUNAGA
Biodiversitas Journal of Biological Diversity Vol. 24 No. 3 (2023)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d240303

Abstract

Abstract. Egra S, Kuspradini H, Kusuma IW, Batubara I, Imra, Nurjannah, Wahyuni E, Yamauchi K, Mitsunaga T. 2023. Potential of prospective medicinal plants of Rhizophoraceaefrom North Kalimantan, Indonesia. Biodiversitas 24: 1346-1355. The abundance of mangrove forests in the equatorial region necessitates proper management, including the sustainable use of plant parts for functional products such as food, medicine, etc. This study aimed to assess the medicinal potential of five mangrove plants through phytochemical analysis, antibacterial assays against Streptococcus sobrinus, DPPH free radicals, and toxicity assay using Artemia salina L., Bruguiera parviflora(Roxb.) Wight and Arn. ex Griff, Bruguiera cylindrica(L.) Blume, Ceriops tagal(Perr.). The plants used were Ceriops tagal (Perr.) C.B. Rob, Rhizophora mucronata Poir, and Rhizophora apiculata Blume. Plant samples were extracted with n-hexane, ethyl acetate, and methanol in that order, and then the obtained plant extracts were subjected to various assays. The results showed that B. cylindrica wood and C. tagal leaf extract had the highest antibacterial activity, with more than 50% relative inhibition. The C. tagal leaf methanolic extract had the highest antioxidant activity, by 91% relative inhibition. Followed by R. mucronata wood ethyl acetate extract and B. parviflora leaf methanolic extract, with 87% and 86%, respectively. The highest value in the cytotoxicity assay was discovered in the B. cylindrica in the very strong category with an LC50value of 22.9 µg/mL. The present study revealed the potential of mangrove plant extracts to have strong antibacterial, cytotoxic, and antioxidant properties.
Co-Authors Etty Wahyuni HARLINDA KUSPRADINI HARLINDA KUSPRADINI IMRA IMRA IRAWAN WIJAYA KUSUMA IRAWAN WIJAYA KUSUMA IRMANIDA BATUBARA Irmanida Batubara KARTINA KARTINA KOSEI YAMAUCHI NURJANNAH NURJANNAH SAAT EGRA SAAT EGRA WULAN TRI WAHYUNI