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Abstract
We previously isolated and characterized a cDNA clone specifically expressed in neurons R3 to R8 and R14 of the Aplysia abdominal ganglion (Nambu, J.R., R. Taussig, A.C. Mahon, and R.H. Scheller (1983) Cell 35: 47-56). The cDNA nucleotide sequence and the inferred protein amino acid sequence suggest that this gene encodes the precursor for neuroactive peptides used by these cells. Peptides corresponding to three regions of the precursor were synthesized, coupled to a protein carrier, and used to generate antibodies. These antibodies stain a set of cell bodies, R3 to R14, and their processes in the abdominal ganglion; no other cells in the nervous system or the periphery are immunoreactive. R3 to R14 send numerous fine immunoreactive processes into the vascularized sheath that surrounds the ganglion. Each of these cells also has a large axon which exits the ganglion via the branchial nerve and terminates on the heart. In addition, R14 is anatomically distinct from R3 to R13 in that it sends additional immunoreactive processes to the vasculature near the ganglion. Immunoreactive processes and varicosities were observed on the efferent vein of the gill, the abdominal ganglion artery, and the anterior aorta. These data are consistent with previous studies suggesting that one or more neuropeptides released from R3 to R14 function as modulators of cardiovascular physiology.
View details for Web of Science ID A1984TN29200017
View details for PubMedID 6491724