We investigated the effects of the novel catecholaminergic and serotoninergic activity enhancer R-(-)-1-(benzofuran-2-yl)-2-propylaminopentane ((-)-BPAP) on the synthesis and secretion of neurotrophins, nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and glial cell line-derived neurotrophic factor (GDNF), in cultured mouse astrocytes. The protein and mRNA levels of the neurotrophic factors were measured using the enzyme-linked immunosorbent assay and reverse transcription-polymerase chain reaction methods, respectively. The amounts of NGF, BDNF, and GDNF secreted from astrocytes into the culture medium increased by up to 120, two, and seven times higher than those of the control, respectively, by treatment with 0.35 mM (-)-BPAP for 24 h. The increases in NGF and GDNF induced by the treatment with (-)-BPAP was inhibited by concomitant treatment with actinomycin D for transcriptional blockade. Furthermore, the treatment with (-)-BPAP for 6 h increased the mRNA expression of NGF, BDNF, and GDNF. These results suggest that (-)-BPAP up-regulated neurotrophic factor synthesis in cultured astrocytes.
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