• Title/Summary/Keyword: (1 ,3)β-glucan synthase

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Screening of Antifungal Natural Products with Inhibitory Effects on (1,3)$\beta$-glucan Synthase ((1,3)$\beta$-Glucansynthase효소 억제 활성을 가진 천연물의 검색)

  • Chun Hyun Ja;Kim Young Sun;Lee Young Hang;Kwak Geu Byum;kwon Suk young;Kwon Tae Oh;Chai Geu Yun
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.17 no.6
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    • pp.1509-1513
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    • 2003
  • Antifungal activities of the extracts from 26 medicinal plants were investigated utilizing paper-disk diffusion method and (1,3)β-glucan synthase inhibitory assay. (1,3)β-glucan synthase is considered as valuable target in the development of antifungal agents. Among the screened extracts, the ethyl acetate extract of Equisetum arvense, the ethyl acetate extract of Polygonum aviculare, the butanol extract of Crataegus pinnatifida and the n-hexane extract of Saussurea lappa showed significant antifungal activities on Candida albacans in both disk diffusion and enzyme assays.

Antifungal Activity of Salvia miltiorrhiza Against Candida albicans Is Associated with the Alteration of Membrane Permeability and (1,3)-β-D-Glucan Synthase Activity

  • Lee, Heung-Shick;Kim, Younhee
    • Journal of Microbiology and Biotechnology
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    • v.26 no.3
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    • pp.610-617
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    • 2016
  • Candidiasis has posed a serious health risk to immunocompromised patients owing to the increase in resistant yeasts, and Candida albicans is the prominent pathogen of fungal infections. Therefore, there is a critical need for the discovery and characterization of novel antifungals to treat infections caused by C. albicans. In the present study, we report on the antifungal activity of the ethanol extract from Salvia miltiorrhiza against C. albicans and the possible mode of action against C. albicans. The increase in the membrane permeability was evidenced by changes in diphenylhexatriene binding and release of both 260-nm-absorbing intracellular materials and protein. In addition, inhibition of cell wall synthesis was demonstrated by the enhanced minimal inhibitory concentration in the presence of sorbitol and reduced (1,3)-β-D-glucan synthase activity. The above evidence supports the notion that S. miltiorrhiza has antifungal activity against C. albicans by the synergistic activity of targeting the cell membrane and cell wall. These findings indicate that S. miltiorrhiza displays effective activity against C. albicans in vitro and merits further investigation to treat C. albicans-associated infections.

Inhibitory effect of sakuranetin on (1,3)-β-glucan synthase

  • You, Myung-Ja;Kim, Bo-Mi;Bhatt, Lok Ranjan;Chai, Kyu-Yun;Baek, Seung-Hwa
    • Advances in Traditional Medicine
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    • v.10 no.1
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    • pp.44-49
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    • 2010
  • An examination of the kinetic properties of UDP-glucose, (1,3)-$\beta$-glucans (callose) synthase, from mung bean seedlings (Sorbus commixta cortex) shows that these enzymes have a complex relationship with UDP-glucose and various effectors. Fluorescence assay showed that deoxynojirimycin increased the inhibitory effect of (1,3)-$\beta$-glucan synthase in a concentration-dependent manner. The inhibitory effect of sakuranetin (34.34%) was higher than that of deoxynojirimycin (80.63%). Disk diffusion method revealed that sakuranetin inhibited the growth of Candida albicans to a 1.5 mm inhibition zone. These results suggest that sakuranetin, isolated from Sorbus commixta cortex extract, can be used as stable antifungal material.

Antioxidative and Antifungal Activity of Equisetum arvense L. (쐐뜨기의 항진균 및 항산화 효과)

  • Chun Hyun Ja;Kim Young Hyun;Lee Hong;Lee Young Hang;Chai Kyu Yun
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.18 no.5
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    • pp.1490-1493
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    • 2004
  • We investigated antifungal and antioxidant activity of Equsetum arvense L. The sterile stems of Equsetum arvense L. were extracted with methanol and then fractionated with n-hexane, ethyl acetate, butanol, and water. And their antifungal activities were determined by using paper disk diffusion method and (1. 3)β-glucan synthase inhibitory activity assay, and antioxidant activities were determined by using DPPH method. The ethyl acetate fraction showed antifungal activity on Candidas albacans in both disk diffusion and enzyme assays. This also showed antioxidant activity in DPPH assay. Further fractionation with ethyl acetate fraction was performed to obtain effective fractions. 4, 5, 6 and 7 fractions showed the significant antifungal antivities, and, 4 and 5 fractions showed the strongest antioxidative activity.