Involvement of canonical Wnt/Wingless signaling in the determination of the positional values within the leg segment of the cricket Gryllus bimaculatus

Taro Nakamura, Taro Mito, Yoshihisa Tanaka, Tetsuya Bando, Hideyo Ohuchi, Sumihare Noji

Research output: Contribution to journalArticle

33 Citations (Scopus)


The cricket Gryllus bimaculatus is a hemimetabolous insect whose nymphs posses the ability to regenerate amputated legs. Previously, we showed that Gryllus orthologues of Drosophila hedgehog (Gb'hh), wingless (Gb'wg) and decapentaplegic (Gb'dpp) are expressed during leg regeneration and play essential roles in the establishment of the proximal-distal axis. Here, we examined their roles during intercalary regeneration: when a distally amputated tibia with disparate positional values is placed next to a proximally amputated host, intercalary growth occurs in order to regenerate the missing part. In this process, we examined expression patterns of Gb'hh and Gb'wg. We found that expressions of Gb'hh and Gb'wg were induced in a regenerate and the host proximal to the amputated region, but not in the grafted donor distal to the regenerate. This directional induction occurs even in the reversed intercalation. Because these results are consistent with a distal-to-proximal respecification of the regenerate, Gb'wg may be involved in the re-establishment of the positional values in the regenerate. Furthermore, we found that no regeneration occurs when Gb'armadillo (the orthologue of beta-catenin) was knocked down by RNA interference. These results indicate that the canonical Wnt/Wingless signaling pathway is involved in the process of leg regeneration and determination of positional information in the leg segment.

Original languageEnglish
Pages (from-to)79-88
Number of pages10
JournalDevelopment Growth and Differentiation
Issue number2
Publication statusPublished - Feb 1 2007



  • Gryllus bimaculatus
  • Wnt signaling
  • leg
  • regeneration
  • wingless

ASJC Scopus subject areas

  • Developmental Biology
  • Cell Biology

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