Mitotic aneuploidy induced by sodium deoxycholate in Aspergillus nidulans

Area of Science:

• Microbiology
• Genetics
• Cell Biology

Background:

• Sodium deoxycholate is a bile salt with known biological activities.
• Aneuploidy, an abnormal chromosome number, is a key indicator of genetic instability.
• Understanding agents that induce aneuploidy is crucial for genotoxicity testing.

Purpose of the Study:

• To investigate the effect of sodium deoxycholate on chromosome segregation in Aspergillus nidulans.
• To elucidate the mechanism by which sodium deoxycholate induces aneuploidy.
• To assess the utility of sodium deoxycholate as a paramorphogenic agent in genotoxicity studies.

Main Methods:

• Utilized a heterozygous diploid strain of Aspergillus nidulans.
• Administered sodium deoxycholate to the fungal cultures.
• Observed and quantified chromosomal abnormalities, specifically aneuploidy.

Main Results:

• Sodium deoxycholate treatment resulted in a significant induction of aneuploidy.
• The mechanism is proposed to involve disruption of the nuclear membrane, interfering with the mitotic apparatus.
• This effect compromises the reliability of sodium deoxycholate for genotoxicity estimations.

Conclusions:

• Sodium deoxycholate is a potent inducer of aneuploidy in Aspergillus nidulans.
• Its mode of action involves interference with mitotic processes via nuclear membrane disruption.
• The paramorphogenic utility of sodium deoxycholate for genotoxicity assessment is limited.