Cellular expression of hBDNF-EGFP mRNA in adult C3 mouse brain. In situ hybridization analysis, shown are bright-field autoradiographs of emulsion-dipped sections. Hybridization probes are indicated above the columns. Filled arrowhead indicates a neuron with strong labeling, empty arrowhead indicates a neuron with weak or absent labeling and double arrowheads indicate a glial cell showing no labeling. CA1, CA3 – hippocampal subfields; DG – dentate gyrus of hippocampus; Hi – hilar area of dentate gyrus; FC – frontal cortex; SM – sensorimotor cortex; Pir – piriform cortex. Scale bar: 20 μm.