Rissyelly, Syaikhul Aziz, Frangky Sangande, Agung Wibawa Mahatva Yodha, Krisyanti Budipramana, Elfahmi, Sukrasno
Fern is one of the groups of primitive plants rich in secondary metabolites that are commonly used to treat various diseases, including antioxidant, anti-hyaluronidase, anti-inflammation, and respiratory disease but less investigated. Flavonoid is one of the secondary metabolites abundantly present in ferns. This study aims to isolate major compounds found in Blechnum orientale act as 15-lipoxygenase (15-LOX) inhibitors. Inhibition of lipoxygenase decrease the production of leukotriene that induces bronchoconstriction in asthma. Isoquercitrin (Quercetin-3-O-β-glucopyranoside) and trifolin (kaempferol-3-O-β-D-galactoside) have been successfully isolated from Blechnum orientale. Further in silico study was performed to explain the binding mode between flavonoid pyranoside or galactoside and flavonoid aglycone in the 15-LOX cavity and their amino acid residues interaction. Isoquercitrin binds with Ile663, Ile400, Leu408, Leu597, Ala404, and Arg403 in the 15-LOX cavity as a lipoxygenase inhibitor. Trifolin binds the same amino acids as isoquercetin with addition His366, Gln596, and Phe175. Both isoquercitrin and trifolin act as competitive inhibitors against lipoxygenase enzymes. © 2022, Bogor Agricultural University. All rights reserved.
Pharmaceutical Biology Research Group, School of Pharmacy, Bandung Institute of Technology, Bandung, Indonesia; Faculty of Pharmacy, University of Indonesia, Depok, Indonesia; Departement of Pharmacy, Faculty of Science, Sumatera Institute of Technology, Lampung, Indonesia; Study Program of Pharmacy, Faculty of Science and Technology, Universitas Prisma, Manado, Indonesia; Politeknik Bina Husada Kendari, Sulawesi Tenggara, Kendari, Indonesia; Department of Pharmaceutical Biology, Faculty of Pharmacy, University of Surabaya, Surabaya, Indonesia
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