Abstract
Coexistence of immunoreactivity for calcitonin gene-related peptide (CGRP) and galanin (GAL) was examined in varicose nerve endings in female rat pelvic paracervical ganglia (PG) and in perikarya of lumbosacral dorsal root ganglia (DRG). Varicose peptide-containing nerves were closely adjacent to somata of neurons in the PG, certain somata being virtually surrounded by immunoreactive varicosities. Some nerve endings were immunoreactive for either CGRP or GAL; in others, immunoreactivity for CGRP and GAL coexisted. Likewise, many perikarya in DRG were CGRP immunoreactive, fewer were GAL immunoreactive, and in some immunoreactivity for CGRP and GAL coexisted. The results suggest there are subpopulations of neuropeptide-containing sensory nerve endings in the PG; some contain CGRP, some contain GAL, and in some CGRP and GAL coexist. These substances contained in sensory nerve endings could have important roles in pelvic ganglionic functions.
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