Why do nanoplastics cause neuron loss while microplastics cause dendritic spine loss despite similar exposure conditions?

The study shows size-dependent differential neurotoxic mechanisms - NPs (0.5 μm) induce neuronal death while MPs (5 μm) cause synaptic damage. The molecular basis for this size-specific divergence in pathological pathways is not explained, limiting understanding of plastic particle neurotoxicity.

Gap type: unexplained_observation Source paper: Adolescent exposure to micro/nanoplastics induces cognitive impairments in mice with neuronal morphological damage and multi-omic alterations. (None, None, PMID:39954360)