Neural circuit-dependent odor adaptation in C. elegans is regulated by the Ras-MAPK pathway

Takaaki Hirotsu, Yuichi Iino

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The molecular machinery that mediates odor adaptation in the olfactory neurons is well documented in various animal species. However, types of adaptation that depend on neural circuits are mostly unexplored.We report here that the Ras-MAPK pathway is essential for such a type of odor adaptation, called early adaptation, in C. elegans. Early adaptation requires a pair of AIY interneurons, which receive synaptic inputs from olfactory neurons. Mutants of the Ras-MAPK pathway show defects in early adaptation. Continued exposure to an odorant causes activation of MAP kinase not only in the olfactory neurons, but also in the AIY interneurons. While activity of the Ras-MAPK pathway in the olfactory neurons is important for odor perception, its activity in the AIY interneurons is important for odor adaptation. Our results thus reveal a dual role of the Ras-MAPK pathway in sensory processing in the nervous system of C. elegans.

Original languageEnglish
Pages (from-to)517-530
Number of pages14
JournalGenes to Cells
Volume10
Issue number6
DOIs
Publication statusPublished - Jun 1 2005

All Science Journal Classification (ASJC) codes

  • Genetics
  • Cell Biology

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