Trichothecene-induced cytotoxicity on human cell lines.

Area of Science:

• Toxicology
• Cell Biology
• Mycotoxicology

Background:

• Trichothecenes are mycotoxins with diverse structures and known toxicities.
• Previous studies have focused on lymphoid cell lines, potentially underestimating broader toxicological impacts.

Purpose of the Study:

• To comparatively assess the cytotoxicity of Type A, B, and D trichothecenes across multiple human cell lines.
• To evaluate the toxicity of trichothecenes on primary human endothelial cells (HUVEC) for the first time.

Main Methods:

• Eight permanent human cell lines (Hep-G2, A549, CaCo-2, HEp-2, A204, U937, RPMI 8226, Jurkat) and primary HUVEC were used.
• Cell viability was measured using a water-soluble tetrazolium (WST-1) assay.
• Toxicity was quantified by the half-maximal inhibitory concentration (IC50).

Main Results:

• Cytotoxic activity varied by trichothecene chemotype (factor of 100-1,000), with IC50 values ranging from 2.2 nmol/l (satratoxin H) to 4,900 nmol/l (deoxynivalenol).
• Individual mycotoxin toxicity showed limited variation across different cell lines, contrary to previous reports.
• Primary HUVEC exhibited comparable susceptibility to trichothecenes as the permanent cell lines.

Conclusions:

• Trichothecene cytotoxicity is highly dependent on chemotype, with significant differences in potency.
• The assumption of greater variability in toxicity across cell lines may be inaccurate; focus on lymphoid cells might underestimate broader risks.
• These findings highlight the need for a broader assessment of trichothecene toxicity across various human cell systems.