Substance K-, Substance P-, and Calcitonin Gene-Related Peptide-Immunoreactive Nerves in Female Reproductive Organs
Nerves in the female rat reproductive tract contain a number of neuropeptides in addition to catecholamines and acetylcholine; e.g., neuropeptide Y (NPY), vasoactive intestinal polypeptide (VIP), substance P (SP)  and calcitonin generelated peptide (CGRP) . Peptidecontaining nerves are perivascular, near the epithelium and in nonvascular smooth muscle. All of these substances are vasoactive and can influence nonvascular smooth musecle; some, such as SF, are in primary afferent nerves. Thus, these peptide-containing nerves could have important functions in the female reproductive system. In our continuing studies of the peripheral nervous system’s influence on reproductive tract function.we examined primary afferent nerves for other peptides besides SP; these include CGRP, cholecystokininoctapeptide (CCK-8), and substance K (SK, neurokinin A; hereafter referred to as NKA). We also examined the sensitivity of these nerves to capsaicin, a neurotoxin for primary sensory neurons.
KeywordsTyrosine Polypeptide Peri Choline Catecholamine
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