An Acetophenone Derivative, Clavatol, and a Benzodiazepine Alkaloid, Circumdatin A, from the Marine-Derived Fungus Cladosporium
An Acetophenone Derivative, Clavatol, and a Benzodiazepine Alkaloid, Circumdatin A, from the Marine-Derived Fungus Cladosporium
Guohua Yang(부경대학교); Xavier N. Siwe(Pukyong National University); Alain S. Leutou(Pukyong National University); Zhile Feng(Pukyong National University); 장대해(부경대학교); Hong Dae Choi(동의대학교); 강정숙(부산대학교); 손병화(부경대학교); Viviane N. Nenkep(부경대학교)
15권 3호, 130~133쪽
초록
The crude extract of the mycelium of Cladosporium was found to exhibit antimicrobial activity against the Staphylococcus aureus, methicillin-resistant S. aureus, and multidrug-resistant S. aureus. Bioassayguided fractionation of an organic extract led to the isolation of an acetophenone derivative, clavatol (2',4'- dihydroxy-3',5'-dimethylacetophenone) (1), and a benzodiazepine alkaloid, circumdatin A (2). Compound 1 showed moderate antibacterial activity against S. aureus, methicillin-resistant S. aureus, and multidrug-resistant S. aureus with minimum inhibitory concentration (MIC) values of 62.5, 62.5, 31.0 µg/mL, respectively, but compound 2 was inactive. Compounds 1 and 2 exhibited UV-A protection activity with ED50 values of 227.0 and 82.0 µM, respectively, indicating that they were more potent than the positive control, oxybenzone (ED50 350 µM), a common sunscreen agent.
Abstract
The crude extract of the mycelium of Cladosporium was found to exhibit antimicrobial activity against the Staphylococcus aureus, methicillin-resistant S. aureus, and multidrug-resistant S. aureus. Bioassayguided fractionation of an organic extract led to the isolation of an acetophenone derivative, clavatol (2',4'- dihydroxy-3',5'-dimethylacetophenone) (1), and a benzodiazepine alkaloid, circumdatin A (2). Compound 1 showed moderate antibacterial activity against S. aureus, methicillin-resistant S. aureus, and multidrug-resistant S. aureus with minimum inhibitory concentration (MIC) values of 62.5, 62.5, 31.0 µg/mL, respectively, but compound 2 was inactive. Compounds 1 and 2 exhibited UV-A protection activity with ED50 values of 227.0 and 82.0 µM, respectively, indicating that they were more potent than the positive control, oxybenzone (ED50 350 µM), a common sunscreen agent.
- 발행기관:
- 한국생약학회
- 분류:
- 약학