Projection of FMRFamide-like neuropeptide-producing neurosecretory cells from silkworm brain into ventral nerve cord and retrocerebral complex

Bo Yong Kim, Hwa Young Song, Mi Young Kim, Pil Don Kang, Min Ho Cha, Hun Hee Park, Seung Kwan Lee, Chang Kyou Lee, Chai Hyeock Yu, Bong Hee Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Using immunostaining methodology, we traced the axonal projection of FMRFamide (Phe-Met-Arg-Phe-NH2)-like immunoreactive (LI) medial neurosecretory cells (MNCs) and lateral neurosecretory cells (LNCs) from the brain into the ventral nerve cord (VNC) and retrocerebral complex in Bombyx mori (L.) (Lepidoptera: Bombycidae). Of the seven pairs of FMRFamide-LI MNCs, one pair extended its axons from the brain pars intercerebralis into the VNC ipsilateral connective where they appeared to terminate. The axons of the remaining MNCs ran through decussation in the brain median region and contralateral nervi corporis cardiaci (NCC) I out of the brain, and eventually innervated the contralateral corpus cardiacum (CC). Axons from the single pair of FMRFamide-LI LNCs projected into the ipsilateral NCC II fused with NCC I without decussation in the brain, and finally terminated in the CC. These results suggest that transport of the FMRFamide-like neuropeptide from may be related to the modulation of functions such as gut contraction in MNCs terminating in the VNC, and regulation of production and/or secretion of specific hormones such as juvenile hormone in MNCs and LNCs terminating in the CC.

Original languageEnglish
Pages (from-to)458-466
Number of pages9
JournalCanadian Entomologist
Volume144
Issue number3
DOIs
Publication statusPublished - 2012 Jun 1

ASJC Scopus subject areas

  • Structural Biology
  • Ecology, Evolution, Behavior and Systematics
  • Physiology
  • Molecular Biology
  • Insect Science

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    Kim, B. Y., Song, H. Y., Kim, M. Y., Kang, P. D., Cha, M. H., Park, H. H., Lee, S. K., Lee, C. K., Yu, C. H., & Lee, B. H. (2012). Projection of FMRFamide-like neuropeptide-producing neurosecretory cells from silkworm brain into ventral nerve cord and retrocerebral complex. Canadian Entomologist, 144(3), 458-466. https://doi.org/10.4039/tce.2012.17