Neurotransmitter receptor architecture links local neurochemistry to semantic memory

The anterior temporal lobe (ATL) shows a distinct transcriptomically inferred neurotransmitter receptor-subunit profile linked to local GABA+ and Glx concentrations and semantic memory performance.

• Why it matters: It addresses how human cortical molecular and neurochemical architecture supports semantic memory, but the receptor-level organization underlying these relationships was unknown.
• What they did: Using imaging transcriptomics plus in vivo magnetic resonance spectroscopy (MRS), the study mapped individual receptor-subunit gene expression to local GABA+ and Glx in the human ATL and related both to semantic memory.
• The result: ATL GABA+ and Glx were positively associated with semantic memory performance, receptor-subunit expression related selectively to semantic accuracy, and mediation showed GABA+ mediated GABAergic receptor architecture effects while Glx mediated both glutamatergic and widespread GABAergic associations.