Molecular and Cellular Basis of Regeneration and Tissue Repair

Dissecting insect leg regeneration through RNA interference
Multi-author Review


Nymphs of hemimetabolous insects such as cockroaches and crickets exhibit a remarkable capacity for regenerating complex structures from damaged legs. Until recent years, however, approaches to elucidate the molecular mechanisms underlying the leg regeneration process have been lacking. Taking the cricket Gryllus bimaculatus as a model, we found that a phenotype related to regeneration frequently appears during leg regeneration, even though no phenotype is induced by RNA interference (RNAi) in the cricket nymph, designated as regeneration-dependent RNAi. Since then, we have investigated the functions of various genes encoding signaling factors and cellular adhesion proteins like Fat and Dachsous during leg regeneration. In this review, we summarize the classical knowledge about insect leg regeneration and introduce recent advances concerning the signaling cascades required for regenerating a leg. Our results provide clues to the mechanisms of regeneration which are relevant to vertebrate systems.


Gryllus bimaculatus legs regeneration positional information Wnt signaling Fat signaling 

Copyright information

© Birkhaueser 2007

Authors and Affiliations

  • T. Nakamura
    • 1
  • T. Mito
    • 1
  • T. Bando
    • 2
  • H. Ohuchi
    • 1
    • 2
  • S. Noji
    • 1
    • 2
  1. 1.Department of Life Systems, Institute of Technology and ScienceUniversity of TokushimaTokushima CityJapan
  2. 2.Tokusima Health and Medicine Cluster (Knowledge Cluster Initiative)University of TokushimaTokushima CityJapan

Personalised recommendations