Kuswandani Faisal, Wilar Gofarana, Wahyuni Indah Suasani, Megantara Sandra, Pitaloka Dian Ayu Eka, Levita Jutti, Jiranusornkul Supat
Doctoral Program in Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang, West Java, Indonesia.
Department of Oral Biology, Faculty of Dentistry, Universitas Padjadjaran, Sumedang, West Java, Indonesia.
J Exp Pharmacol. 2025 Jun 17;17:359-374. doi: 10.2147/JEP.S524890. eCollection 2025.
BACKGROUND: Gingerols and shogaols are the main active constituents in var. Valeton has been reported for its anti-anxiety activity. Anti-anxiety drugs, such as benzodiazepines, alleviate anxiety disorders by enhancing the activity of gamma-aminobutyric acid type A (GABA) receptors through positive allosteric regulation at the α1/γ2 interface extracellular domain. PURPOSE: To elucidate the binding energy and stability of gingerols and shogaols toward human GABA receptor (hGABAR), compared to their known allosteric agonist (diazepam), and further phytochemical analysis in the ethanol extract of var. Valeton rhizome (EEZO). METHODS: The ligands, namely gingerols (6-, 8-, and 10-gingerol) and shogaols (6-, 8-, and 10-shogaol), were evaluated by pre-ADMET screening tools and molecular docking simulation towards hGABAR α1/γ2 subtype (PDB ID: 6X3X). Compounds with the best pre-ADMET profile and affinity were subjected to a 200 ns molecular dynamics (MD) simulation. The UPLC analysis was performed to detect and quantify gingerol and shogaol in EEZO. RESULTS: The best pre-ADMET prediction was shown by 6-gingerol, whereas the molecular docking simulations revealed that the best binding affinity and stability were shown by 6-gingerol (-7.41 kcal/mol) and 10-shogaol (-8.24 kcal/mol), which are comparable to that of diazepam. They build hydrogen bonds with α1 Ser206 and pi interaction with γ2 Phe77. The MD simulation confirmed that the stability of the 10-shogaol/hGABAR and 6-gingerol/hGABAR complexes is equal to that of diazepam/hGABAR. The UPLC analysis resulted in a level of 44.98 µg/mL for 6-gingerol and 2.52 µg/mL for 10-shogaol. CONCLUSION: 6-Gingerol and 10-shogaol of EEZO may have the potential to be developed as novel allosteric agonists of human GABA receptors, thus explaining their anti-anxiety activity. However, the activity towards the human GABA receptor is lower than diazepam, its known allosteric agonist.
背景:姜辣素和姜烯酚是姜黄变种中的主要活性成分。已报道姜黄变种具有抗焦虑活性。抗焦虑药物,如苯二氮䓬类药物,通过在α1/γ2界面细胞外结构域进行正变构调节来增强γ-氨基丁酸A型(GABA)受体的活性,从而缓解焦虑症。 目的:与已知的变构激动剂(地西泮)相比,阐明姜辣素和姜烯酚对人GABA受体(hGABAR)的结合能和稳定性,并对姜黄变种根茎乙醇提取物(EEZO)进行进一步的植物化学分析。 方法:通过预ADMET筛选工具和针对hGABAR α1/γ2亚型(PDB ID:6X3X)的分子对接模拟,对配体,即姜辣素(6-、8-和10-姜辣素)和姜烯酚(6-、8-和10-姜烯酚)进行评估。对具有最佳预ADMET特征和亲和力的化合物进行200 ns的分子动力学(MD)模拟。进行超高效液相色谱(UPLC)分析以检测和定量EEZO中的姜辣素和姜烯酚。 结果:6-姜辣素显示出最佳的预ADMET预测结果,而分子对接模拟表明,6-姜辣素(-7.41 kcal/mol)和10-姜烯酚(-8.24 kcal/mol)表现出最佳的结合亲和力和稳定性,与地西泮相当。它们与α1 Ser206形成氢键,并与γ2 Phe77形成π相互作用。MD模拟证实,10-姜烯酚/hGABAR和6-姜辣素/hGABAR复合物的稳定性与地西泮/hGABAR的稳定性相当。UPLC分析得出6-姜辣素的含量为44.98 μg/mL,10-姜烯酚的含量为2.52 μg/mL。 结论:EEZO中的6-姜辣素和10-姜烯酚可能有潜力被开发为新型人GABA受体变构激动剂,从而解释它们的抗焦虑活性。然而,它们对人GABA受体的活性低于其已知的变构激动剂地西泮。
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