Developmental Exposure to Bisphenol a Degrades Auditory Cortical Processing in Rats
Binliang Tang1,2, Kailin Li1,2, Yuan Cheng1,2
1Key Laboratory of Brain Functional Genomics of Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China.
Neuroscience Bulletin
|June 7, 2022
Summary
Developmental exposure to bisphenol A (BPA) impairs auditory cortex function and behavior in rats. This endocrine disruptor affects sound processing and discrimination, highlighting risks for human health.
Area of Science:
- Neuroscience
- Toxicology
- Developmental Biology
Background:
- Bisphenol A (BPA) is an endocrine-disrupting contaminant linked to cognitive deficits.
- The impact of BPA on developing primary sensory systems, like the auditory cortex, is not well understood.
Purpose of the Study:
- To investigate the effects of lactational BPA exposure on the primary auditory cortex (A1) in rats.
- To assess physiological, structural, and behavioral changes in the A1 following BPA exposure.
Main Methods:
- Rats were exposed to BPA during lactation.
- Auditory cortex function was assessed using electrophysiology.
- Structural changes in dendritic spines were analyzed.
- Behavioral tests evaluated sound temporal rate discrimination.
Main Results:
- BPA-exposed rats exhibited significant behavioral impairments in sound temporal rate discrimination.
- Altered spectral and temporal processing was observed in the A1, with reduced frequency selectivity and diminished neuronal response to stimulus rates.
- Changes in dendritic spine density and maturity were noted in the A1.
Conclusions:
- Developmental BPA exposure negatively impacts auditory cortical processing and discrimination abilities, especially temporal aspects.
- These findings underscore the potential health risks of early-life exposure to endocrine disruptors like BPA.
