Potent and Selective Inhibitors of Human Monoamine Oxidase A from an Endogenous Lichen Fungus Diaporthe mahothocarpus
- 주제(키워드) endogenous lichen fungus , Diaporthe mahothocarpus , alternariol , 5-hydroxy-alternariol , mycoepoxydiene , selective monoamine oxidase A inhibitor , docking simulation
- 주제(기타) Microbiology; Mycology
- 설명문(일반) [Jeong, Geum Seok; Park, Jong-Eun; Kim, Hoon] Sunchon Natl Univ, Res Inst Life Pharmaceut Sci, Dept Pharm, Sunchon 57922, South Korea; [Hillman, Prima F.; Nam, Sang-Jip] Ewha Womans Univ, Dept Chem & Nanosci, Seoul 03760, South Korea; [Kang, Myung-Gyun; Hwang, Sungbo; Park, Daeui] Korea Inst Toxicol, Dept Predict Toxicol, Daejeon 34114, South Korea
- 등재 SCIE, SCOPUS
- OA유형 Green Published, gold
- 발행기관 MDPI
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000183760
- 본문언어 영어
- Published As http://dx.doi.org/10.3390/jof7100876
- PubMed https://pubmed.ncbi.nlm.nih.gov/34682298
초록/요약
Using 126 endogenous lichen fungus (ELF) extracts, inhibitory activities against monoamine oxidases (MAOs) and cholinesterases (ChEs) were evaluated. Among them, extract ELF29 of the endogenous fungus Diaporthe mahothocarpus of the lichen Cladonia symphycarpia showed the highest inhibitory activity against hMAO-A. Compounds alternariol (AT), 5 & PRIME;-hydroxy-alternariol (HAT), and mycoepoxydiene (MED), isolated from the extract, had potent inhibitory activities against hMAO-A with IC50 values of 0.020, 0.31, and 8.68 mu M, respectively. AT, HAT, and MED are reversible competitive inhibitors of hMAO-A with K-i values of 0.0075, 0.116, and 3.76 mu M, respectively. The molecular docking studies suggested that AT, HAT, and MED had higher binding affinities for hMAO-A (-9.1, -6.9, and -5.6 kcal/mol, respectively) than for hMAO-B (-6.3, -5.2, and -3.7 kcal/mol, respectively). The relative tight binding might result from a hydrogen bond interaction of the three compounds with a Tyr444 residue in hMAO-A, whereas no hydrogen bond interaction was proposed in hMAO-B. In silico pharmacokinetics, the three compounds showed high gastrointestinal absorption without violating Lipinski's five rules, but only MED showed high probability to cross the blood-brain barrier. These results suggest that AT, HAT, and MED are candidates for treating neuropsychiatric disorders, such as depression and cardiovascular disease.</p>
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