Saccharomyces cerevisiae cell wall components as tools for ochratoxin a decontamination

Area of Science:

• Food Science
• Mycology
• Biotechnology

Background:

• Ochratoxin A (OTA) is a prevalent mycotoxin posing risks to food safety and animal health.
• Yeast cell wall components, particularly glucans, are explored for their mycotoxin binding capabilities.

Purpose of the Study:

• To assess the efficacy of various Saccharomyces cerevisiae cell wall preparations in adsorbing ochratoxin A.
• To compare the OTA binding capacity of different yeast-derived glucan fractions and whole yeast cells.

Main Methods:

• Fourier Transform Infrared (FTIR) spectroscopy was used to characterize yeast preparations.
• Adsorption experiments were conducted to quantify OTA binding by different yeast cell wall components.
• The influence of pH on OTA adsorption was investigated.

Main Results:

• Yeast cell wall preparations, water-extracted glucan, and commercial glucan demonstrated significant OTA adsorption (>55% of initial concentration).
• Alkaline-extracted glucan exhibited lower OTA adsorption efficiency.
• Optimal OTA adsorption occurred at near-neutral pH, with significantly reduced binding in alkaline conditions.

Conclusions:

• Saccharomyces cerevisiae cell wall preparations, rich in glucans, are effective adsorbents for ochratoxin A.
• The extraction method and pH significantly influence the mycotoxin binding capacity of yeast-derived glucans.
• These findings support the potential application of yeast cell wall components in mitigating OTA contamination.