Genome-wide expression reveals multiple systemic effects associated with detection of anticoagulant poisons in...

Area of Science:

• Environmental Toxicology
• Wildlife Health
• Molecular Ecology

Background:

• Anticoagulant rodenticides (ARs) are widely used, posing secondary poisoning risks to non-target wildlife.
• Sublethal effects of AR exposure on wildlife fitness are increasingly recognized.
• Understanding molecular-level impacts is crucial for assessing AR risks.

Purpose of the Study:

• To investigate the genome-wide gene expression patterns in bobcats exposed to anticoagulant rodenticides.
• To identify specific biological pathways affected by AR exposure in a wild carnivore population.
• To assess the potential sublethal consequences of ARs on wildlife health.

Main Methods:

• Analysis of genome-wide expression profiles in bobcat populations from southern California.
• Identification of differentially expressed genes related to xenobiotic metabolism, stress response, and immune function.
• Correlation of gene expression changes with potential impacts on leukocyte differentiation.

Main Results:

• Differential gene expression was observed in bobcats exposed to ARs.
• Affected genes are involved in critical pathways including xenobiotic metabolism, ER stress, and immune function.
• Evidence suggests ARs may influence leukocyte differentiation, impacting adaptive and innate immunity.

Conclusions:

• AR exposure induces significant sublethal changes in gene expression in wild bobcats.
• These molecular disruptions highlight potential fitness consequences for exposed wildlife.
• Findings underscore the need for broader investigation into AR impacts on diverse species and other environmental toxicants.