A study published in Translational Psychiatry reports on Mar. 31 that researchers have identified six key molecular targets connecting exposure to bisphenol A (BPA), a common chemical, with biological pathways involved in major depressive disorder (MDD).
The findings are significant as they offer new insight into how environmental chemicals like BPA may influence mental health. MDD is a widespread condition with serious public health implications, and understanding potential contributors is important for prevention and treatment.
Researchers used an integrative approach combining genetic epidemiology, transcriptomics, molecular docking, and mouse experiments. They compiled BPA-associated targets from several databases and identified overlaps with MDD-related proteins. Their analysis found disruptions in synaptic signaling, neurodevelopment, and cognition linked to both BPA exposure and depression.
Six central regulators were highlighted: SRC proto-oncogene tyrosine kinase (SRC), estrogen receptor 1 (ESR1), AKT serine/threonine kinase 1 (AKT1), epidermal growth factor receptor (EGFR), Janus kinase 3 (JAK3), and phospholipase C gamma 2 (PLCG2). Transcriptomic analyses showed most of these genes were upregulated in MDD except EGFR, which was downregulated. Molecular docking suggested strong binding between BPA and some core proteins such as AKT1 and ESR1.
Experimental validation included behavioral tests in mice exposed to BPA that demonstrated anxiety- and depression-like behaviors. Gene expression patterns observed in the animals matched those seen in human samples. The study also noted possible effects on blood-brain barrier interactions and neurological function through additional protein targets.
The authors say their work highlights the need for further research into how environmental exposures contribute to mental health risks. They recommend future studies use larger populations to confirm these findings over time, as well as expanded multi-omics approaches for more precise interventions.
