• Applied Biological Chemistry
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• 제47권2호
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• pp.283-286
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• 2004

In the course of screening for reactive oxygen species scavengers from natural products, two antioxidants were isolated from the edible mushroom Polyozellus multiflex and identified as polyozellin and thelephoric acid. Thelephoric acid inhibited 45.7% of the super oxide anion radical, 74.6% of the hydroxyl radical, and 44.0% of the DPPH radical at 0.1 mM, while the positive control ${\alpha}-tocopherol$ did 22.1%, 75.6%, and 26.5% of each radical, respectively. Polyozellin, the reductive acetylated form of thelephoric acid, showed almost same scavenging activity against above mentioned radicals. The isolated compounds showed scavenging activity on the superoxide anion radical in the ESR method ($IC_{50}$ of polyozellin and thelephoric acid were $218.0\;{\mu}M$ and $21.1\;{\mu}M$, respenctively). However, they showed no significant activity on the hydrogen peroxide radical.

• Biomolecules & Therapeutics
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• 제22권2호
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• pp.155-160
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• 2014

Thelephoric acid is an antioxidant produced by the hydrolysis of polyozellin, which is isolated from Polyozellus multiplex. In the present study, the inhibitory effects of polyozellin and thelephoric acid on 9 cytochrome P450 (CYP) family members (CYP1A2, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, CYP2E1, and CYP3A4) were examined in pooled human liver microsomes (HLMs) using a cocktail probe assay. Polyozellin exhibited weak inhibitory effects on the activities of all 9 CYPs examined, whereas thelephoric acid exhibited dose- and time-dependent inhibition of all 9 CYP isoforms ($IC_{50}$ values, $3.2-33.7{\mu}M$). Dixon plots of CYP inhibition indicated that thelephoric acid was a competitive inhibitor of CYP1A2 and CYP3A4. In contrast, thelephoric acid was a noncompetitive inhibitor of CYP2D6. Our findings indicate that thelephoric acid may be a novel, non-specific CYP inhibitor, suggesting that it could replace SKF-525A in inhibitory studies designed to investigate the effects of CYP enzymes on the metabolism of given compounds.

• 한국균학회지
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• 제26권4호통권87호
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• pp.519-524
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• 1998

국내 자생버섯인 까치버섯(Polyozellus multiflex의 메탄을 추출물로부터 이 버섯이 생산하는 2차 대사산물을 조사한 결과 기 보고된 주 2차 대사산물인 polyozellin 이외에 미량 2차 대사산물로서 4가지 화합물이 단리되었으며 이들은 각종 spectral analysis에 의하여 각각 ergost-4,6,8,22-tetraen-3-one, 4-methoxy-6-methyl-2H-pyran-2-one, p-anisic acid, 및 p-hydroxybenzoic acid로 동정되었다. 이들에 대하여 prolyl endopeptidase 및 acetylcholine esterase에 대한 저해 활성을 측정하였으나 최고 100 ppm의 농도에서도 저해활성을 나타내지 못하였다.