Abstract
An antiserum against an achetakinin analog selectively localized leucokinin VIII (LKVIII) in the CNS of Leucophaea maderae. Preabsorption studies of the achetakinin antiserum with either preimmune serum or LKVIII prevented a positive reaction in both ELISA and immunocytochemical procedures. LKVIII immunoreactive neurons were found in the brain, frontal, and subesophageal ganglion, all 3 thoracic ganglia and the terminal ganglion. Nerves originating from the thoracic and terminal abdominal ganglia contain LKVIII material. Lateral and medial neurosecretory cells synthesizing LKVIII-like products contribute axons to the nervi corporis cardiaci that terminate in neurohemal sites in the corpora cardiaca and nervi corporis allati. Thus, leucokinin VIII, like leucokinin I (LKI) and leucomyosuppressin (LMS), appears to have both a neurohemal and neurotransmitter mode of regulating target cells in L. maderae.
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