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1 August 2003 Firing Activities of Neurosecretory Cells Producing Diapause Hormone and its Related Peptides in the Female Silkmoth, Bombyx mori. II. Mandibular and Maxillary Cells
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Abstract

A gene encoding a precursor polyprotein of diapause hormone (DH) and four related peptides is expressed by three groups of neurosecretory cells in the suboesophageal ganglion (SOG) of Bombyx mori. Long-term chronic recordings of firing activities were made from a common axonal tract (the maxillary nerve) of two groups of cells localized in the mandibular and maxillary neuromeres of SOG during pupal-adult development. Mandibular and maxillary cells usually produced a cluster of action potentials at an interval of 30–60 min during pupal-adult development and there was no significant difference in the firing activity profile between diapause-egg and non-diapause-egg producers. We suggest that rather than DH secretion, pupal mandibular and maxillary cells are involved in the secretion of DH-related neuropep-tides. DH secretion seems to be assigned to the third group of cells (labial cells); hence, there may be different posttranslational processing of the precursor polyprotein in different neurosecretory cell groups.

Toshio Ichikawa and Satoshi Kamimoto "Firing Activities of Neurosecretory Cells Producing Diapause Hormone and its Related Peptides in the Female Silkmoth, Bombyx mori. II. Mandibular and Maxillary Cells," Zoological Science 20(8), 979-983, (1 August 2003). https://doi.org/10.2108/zsj.20.979
Received: 18 April 2003; Accepted: 1 May 2003; Published: 1 August 2003
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