1,8-cineole in Java cardamom essential oil selectively inhibits orexin receptors (OX1R/OX2R): Molecular docking and dynamics

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Sentot Joko Raharjo, Ernanin Dyah Wijayanti, Dewi Ratih Tirto Sari, Yantty Maryanty, Ita Trisnowati

2025 Tropical Journal of Pharmaceutical Research Vol. 24 Issue 8 Article Cited by 0 SDG 3SDG 17 Quartile

Abstract

Purpose: To determine the insomnia therapeutic potential of compounds contained in Java cardamom essential oil (JCEO) by targeting orexin-1/2 (OX-1/OX-2) receptors using molecular docking and dynamics. Methods: Forty compounds from GC-MS analysis of Java cardamom essential oil were retrieved from the database, docked with orexin-1 and 2 receptors, and their interactions analyzed. Molecular dynamics simulations were carried out to study the inhibitor binding interactions of the compounds with the best docking score using OpenMM in Google Colab. Results: Java cardamom essential oil compounds are bound to the sites where native ligands bind on orexin-1 (OX-1) and orexin-2 (OX-2) receptors. The binding affinity of JCEO compounds tends to be relatively selective towards orexin-2 (OX2R). 1,8-cineole is the best in its selectivity towards orexin-2 and the most stable. Conclusion: 1,8-cineole in JCEO could treat insomnia through selective inhibition of OX2R. © 2025 The authors.

Affiliations

Health Polytechnique of Putra Indonesia Malang, Indonesia; Research Center of Smart Molecule of Natural Genetics Resource, Brawijaya University, Indonesia; Pharmacy Department, Faculty of Health Science, Ibrahimy University, Situbondo, Indonesia; State Polytechnic of Malang, Indonesia; Balatif, PT, Malang, Indonesia

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