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Related Concept Videos

Antifungal Agents01:15

Antifungal Agents

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Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to...
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Basidiomycota is a diverse phylum of fungi that includes ecologically significant decomposers such as white rot fungi, symbionts like mycorrhizal fungi, plant pathogens such as rusts and smuts, and edible species like Agaricus bisporus (the common button mushroom). These fungi play crucial roles in nutrient cycling, symbiotic relationships, and even human health. Their defining feature is the basidium, a microscopic club-shaped structure responsible for producing basidiospores.Fruiting Bodies...
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Triterpenoids and an alkamide from Ganoderma tsugae.

Kai-Wei Lin1, Dravidum Maitraie1, A-Mei Huang2

  • 1School of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.

Fitoterapia
|November 25, 2015
PubMed
Summary

This study isolated novel compounds from Ganoderma tsugae, with compound 7 showing potent inhibition of superoxide anion generation and compounds 4 and 7 indicating potential as cancer chemopreventive agents.

Keywords:
Anti-inflammatoryAntioxidantCytotoxicityGanoderma tsugaeLanostanoidSeco-lanostanoid

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Area of Science:

  • Natural Product Chemistry
  • Medicinal Mushroom Research
  • Pharmacology

Background:

  • Ganoderma tsugae is a medicinal mushroom with a history of use in traditional medicine.
  • Ongoing research aims to identify and characterize bioactive compounds from G. tsugae for potential therapeutic applications.
  • Previous studies have revealed a diverse range of secondary metabolites with various biological activities.

Purpose of the Study:

  • To isolate and characterize novel bioactive constituents from the fruit bodies of Ganoderma tsugae.
  • To evaluate the inhibitory effects of isolated compounds on xanthine oxidase (XO) and superoxide anion generation.
  • To assess the cytotoxic activities of the compounds against PC3 cancer cells.

Main Methods:

  • Isolation and structural elucidation of new compounds using spectroscopic methods (NMR, MS).
  • Preparation of seco-lanostanoids from a precursor compound.
  • In vitro assays to measure xanthine oxidase inhibition (IC50 values).
  • Measurement of superoxide anion generation in rat neutrophils stimulated with fMLP/cytochalasin B (IC50 values).
  • Cytotoxicity assays against PC3 cells.

Main Results:

  • A new lanostanoid (tsugaric acid F, 1), a novel palmitamide (2), and three new seco-lanostanoids (5-7) were isolated and characterized.
  • Compound 4 demonstrated significant inhibition of xanthine oxidase (XO) with an IC50 of 43.9 μM.
  • Compound 7 potently inhibited superoxide anion generation (IC50 = 1.3 μM).
  • Compounds 4-7 exhibited weak cytotoxic activity against PC3 cells.

Conclusions:

  • The isolated compounds, particularly tsugaric acid F and other seco-lanostanoids, possess notable biological activities.
  • Compounds 4 and 7 show promise as potential cancer chemopreventive agents due to their inhibitory effects.
  • Further research is warranted to explore the therapeutic potential of these Ganoderma tsugae-derived compounds.