Abstract

The origin of γ-aminobutyric acid (GABA) in the rat oviduct was investigated by measuring GABA levels in the oviduct after selective ablation of the extrinsic oviductal innervation. Rats killed 20 days after ablation of nerves connected with the left oviduct showed no differences in GABA levels in the left vs the right oviduct. Rats killed 50 days after ablation of the left ovarian vascular nerve bundle showed a decreased GABA content in the left vs the right (intact) oviduct which was more pronounced in rats killed 90 days after ablation. In contrast, GABA levels were unchanged 50 days after ligation of either the suspensory ligament of the ovary or the uterine artery. Our results indicate the involvement of a GABAergic component in the extrinsic innervation of the rat oviduct.

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