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Generic wound signals initiate regeneration in missing-tissue contexts

 
: Owlarn, S.; Klenner, F.; Schmidt, D.; Rabert, F.; Tomasso, A.; Reuter, H.; Mulaw, M.A.; Moritz, S.; Gentile, L.; Weidinger, G.; Bartscherer, K.

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Nature Communications 8 (2017), No.1, Art. 2282, 13 pp.
ISSN: 2041-1723
English
Journal Article, Electronic Publication
Fraunhofer IBMT ()

Abstract
Despite the identification of numerous regulators of regeneration in different animal models, a fundamental question remains: why do some wounds trigger the full regeneration of lost body parts, whereas others resolve by mere healing? By selectively inhibiting regeneration initiation, but not the formation of a wound epidermis, here we create headless planarians and finless zebrafish. Strikingly, in both missing-tissue contexts, injuries that normally do not trigger regeneration activate complete restoration of heads and fin rays. Our results demonstrate that generic wound signals have regeneration-inducing power. However, they are interpreted as regeneration triggers only in a permissive tissue context: when body parts are missing, or when tissue-resident polarity signals, such as Wnt activity in planarians, are modified. Hence, the ability to decode generic wound-induced signals as regeneration-initiating cues may be the crucial difference that distinguishes animals that regenerate from those that cannot.

: http://publica.fraunhofer.de/documents/N-503011.html