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An Ex vivo Assay to Study Candida albicans Hyphal Morphogenesis in the Gastrointestinal Tract
Published on: July 1, 2020
Cinnamic aldehydes affect hydrolytic enzyme secretion and morphogenesis in oral Candida isolates
Sheikh Shreaz1, Rimple Bhatia, Neelofar Khan
1Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India.
Microbial Pathogenesis
|January 10, 2012
Summary
Cinnamaldehyde derivatives significantly inhibit Candida albicans growth and virulence factors like proteinase and phospholipase secretion. These compounds also suppress hyphal development, offering potential therapeutic strategies against oral Candida infections.
Area of Science:
- * Microbiology
- * Mycology
- * Medicinal Chemistry
Background:
- * *Candida albicans* is an opportunistic fungal pathogen causing oral infections.
- * Virulence factors such as proteinase, phospholipase, and morphogenesis contribute to *C. albicans* pathogenicity.
- * Novel therapeutic agents are needed to combat *C. albicans* infections, including drug-resistant strains.
Purpose of the Study:
- * To investigate the effect of cinnamaldehyde (CD), 4-hydroxy-3-methoxy cinnamaldehyde (HMCD), and 3,5-dimethoxy-4-hydroxy cinnamaldehyde (HDMCD) on the growth and virulence of *Candida albicans*.
- * To evaluate the efficacy of these compounds against both a standard strain and clinical oral isolates of *C. albicans*.
- * To assess the impact of these cinnamaldehyde derivatives on key virulence factors: proteinase and phospholipase secretion, morphogenesis, and haemolytic activity.
Main Methods:
- * Broth microdilution and agar diffusion assays were used to determine minimum inhibitory concentrations (MICs) and assess growth inhibition.
- * Proteinase and phospholipase secretion assays were performed to quantify enzyme activity.
- * Morphogenesis was induced, and hyphal development was measured over time.
- * Haemolytic activity was assessed to evaluate potential cytotoxic effects.
Main Results:
- * All three cinnamaldehyde derivatives significantly inhibited *C. albicans* growth, with MIC₉₀ values varying by compound.
- * Proteinase and phospholipase secretion were significantly reduced by all tested compounds, with HDMCD showing the most potent inhibition.
- * Hyphal development and morphogenesis were suppressed by CD, HMCD, and HDMCD.
- * Haemolytic activity was generally lower for the tested compounds compared to fluconazole.
Conclusions:
- * Cinnamaldehyde derivatives demonstrate significant antifungal activity against *Candida albicans*, including oral isolates.
- * These compounds effectively inhibit key virulence factors, suggesting potential as anti-virulence agents.
- * HDMCD showed the strongest inhibitory effects on growth and virulence factors, highlighting its therapeutic potential.
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