• Mycobiology
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• 제40권2호
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• pp.142-144
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• 2012

During the search for neuraminidase inhibitors from medicinal fungi, we found that the culture broth of Phellinus linteus exhibited potent inhibitory activity. Solvent partition, Sephadex LH-20 column chromatography, and high-performance liquid chromatography (HPLC) were performed for purification of two active substances from the culture broth. According to $^1H$ NMR measurements and comparison of HPLC retention times with those of authentic compounds, their chemical structures were identified as hispidin and hypholomine B. Compounds (hispidin) 1 and 2 (hypholomine B) inhibited neuraminidase, with $IC_{50}$ values of 13.1 and 0.03 ${\mu}M$, respectively.

• Journal of Microbiology and Biotechnology
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• 제18권1호
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• pp.107-109
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• 2008

Medicinal fungi, Phellinus linteus and Inonotus xeranticus, produce a cluster of yellow pigment in their fermentation broth that acts as an important element of biological activity. The pigment is composed of diverse polyphenols with a styrylpyrone moiety, mainly hispidin and its dimers, 3,14'-bihispidinyl, hypholomine B, and 1,1-distyrylpyrylethan. Although dimeric hispidins were proposed to be biosynthesized from two molecules of monomer via oxidative coupling by ligninolytic enzymes, laccase and peroxidase, the details of this process remain unknown. In this preliminary study, we attempted to achieve enzymatic synthesis of the hispidin dimer from hispidin by using commercially available horseradish peroxidase (HRP). Consequently, a hispidin dimer, 3,14'-bihispidinyl, was synthesized, whereas the other dimers, hypholomine B and 1,1-distyrylpyrylethan, were not produced. This result suggested that the oxidative coupling at the C-3 and C-14' positions of hispidins was dominant in the process of dimerization by HRP, and indicated that additional catalysts or substrates would be needed to synthesize other hispidin dimers present in the fungal metabolite.

• 한국버섯학회지
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• 제18권1호
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• pp.29-36
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• 2020

P. linteus(품종명: 고려상황, PLKS)와 P. baumii (장수상황, PBJS)를 동일한 조건하에서 인공재배하여 얻어진 자실체를 70% 메탄올, 60% 에탄올, 열수추출하여 폴리페놀과 플라보노이드 측정 시 함량은 60%에탄올 추출물에서 가장 높게 나타났다. 60%에탄올을 용매로 PLKS와 PBJS의 자실체를 추출하여 농도별로 DPPH (2,2-diphenyl-1-picrylhydrazyl), ABTS (2,2'-azino-bis (3-ethylbisthiazoline-6-sulfonic acid) 라디칼 소거능을 측정한 결과 PLKS와 PBJS는 거의 유사한 항산화 활성을 보였으며 자실체가 균사체보다 2-3배 이상 높은 항산화 활성이 측정되었으나 FRAP (ferric reducing antioxidant power)분석에서는 자실체와 균사체 간에 큰 차이가 없는 것을 확인하였다. PLKS와 PBJS의 자실체 ethyl acetate 분획물을 HPLC 분석한 결과 styrylpyrone 계 폴리페놀 성분인 davallialactone, hispidin, hypholomine B, inoscavin A를 검출할 수 있었으나 균사체에서는 검출되지 않아 자실체 특이적인 화합물인 것을 확인하였다.

• 한국버섯학회지
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• 제16권4호
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• pp.311-317
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• 2018

참나무 단목원목으로 재배한 P. linteus KACC93057P(PLHS)2년산 자실체 60%에탄올 추출물의 총 페놀함량은 $19.05{\pm}0.32mg\;GAE/g$로 다른 비교구 버섯 종에 비하여 4배에서 10배이상의 높게 나타났다. $125{\mu}g/mL$농도에서 DPPH와 ABTS 라디칼 소거능은 62%와 100%를 나타냈으며 FRAP 환원력은 $0.7{\mu}MFeSO_4/g$으로 비교 구 버섯종 보다 2에서 10배이상의 유효활성이 검출 되었다. PLHS 자실체 ethyl acetate분배 추출물의 HPLC분석에서 styrylpyrone 계열의 화합물 davallialactone, hispidin, hypholomine B와 phenylpropanoid 계열의 화합물인 caffeic acid가 동정 되었다.

• 한국균학회소식:학술대회논문집
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• 한국균학회 2016년도 춘계학술대회 및 임시총회
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• pp.41-41
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• 2016

Influenza viruses are RNA viruses that belong to the Orthomyxoviridae family, and those can be divided into three types; A, B, and C, which based on the differences of the inner nucleoproteins and genomic structures. All three genera differ in their genomic structure and nucleoprotein content, they are further classified into various serotypes based on the two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). These glycoproteins play crucial roles in viral infection and replication. Hemagglutinin mediates binding of virions to sialic acid receptors on the surfaces of target cells at the initial stage of infection. Neuraminidase cleaves the glycosidic bonds of sialic acids from the viral and cell surfaces to release the mature virions from infected cells, after viral replication. Because NA plays an important role in the viral life cycle, it is considered an attractive therapeutic target for the treatment of influenza. The methanolic extracts of Phellinus baumii and Phellinus igniarius exhibited significant activity in the neuraminidase inhibition assay. Polyphenolic compounds were isolated from the methanolic extracts. The structures of these compounds were determined to be hispidin, hypholomine B, inoscavin A, davallialactone, phelligridin D, phelligridin E, and phelligridin G by spectroscopic methods. Compounds inhibited the H1N1 neuraminidase activity in a dose-dependent manner with $IC_{50}$ values of 50.9, 22.9, 20.0, 14.2, 8.8, 8.1 and $8.0{\mu}M$, respectively. Moreover, these compounds showed anti-influenza activity in the viral cytopathic effect (CPE) reduction assay using MDCK cells. These results suggests that the polyphenols from P. baumii and P. igniarius are promising candidates for prevention and therapeutic strategies against viral infection.