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Takaku, Y.* ; Hwang, J.S.* ; Wolf, A. ; Böttger, A.* ; Shimizu, H.* ; David, C.N.* ; Gojobori, T.*

Innexin gap junctions in nerve cells coordinate spontaneous contractile behavior in Hydra polyps.

Sci. Rep. 4:3573 (2014)
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Nerve cells and spontaneous coordinated behavior first appeared near the base of animal evolution in the common ancestor of cnidarians and bilaterians. Experiments on the cnidarian Hydra have demonstrated that nerve cells are essential for this behavior, although nerve cells in Hydra are organized in a diffuse network and do not form ganglia. Here we show that the gap junction protein innexin-2 is expressed in a small group of nerve cells in the lower body column of Hydra and that an anti-innexin-2 antibody binds to gap junctions in the same region. Treatment of live animals with innexin-2 antibody eliminates gap junction staining and reduces spontaneous body column contractions. We conclude that a small subset of nerve cells, connected by gap junctions and capable of synchronous firing, act as a pacemaker to coordinate the contraction of the body column in the absence of ganglia.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Electrical Synapses; Evolution; Genome; Organization; Proteins; System; Gene
Language english
Publication Year 2014
HGF-reported in Year 2014
ISSN (print) / ISBN 2045-2322
e-ISSN 2045-2322
Quellenangaben Volume: 4, Issue: , Pages: , Article Number: 3573 Supplement: ,
Publisher Nature Publishing Group
Publishing Place London
Reviewing status Peer reviewed
POF-Topic(s) 30504 - Mechanisms of Genetic and Environmental Influences on Health and Disease
Research field(s) Enabling and Novel Technologies
PSP Element(s) G-552500-001
PubMed ID 24394722
Scopus ID 84891877472
Erfassungsdatum 2014-02-13