A Calcium Wave Mediated by Gap Junctions Coordinates a Rhythmic Behavior in C. Elegans

Title:
A Calcium Wave Mediated by Gap Junctions Coordinates a Rhythmic Behavior in C. Elegans
Authors:
Peters, Maureen A.; Teramoto, Takayuki; Iwasaki, Kouichi; White, Jamie Q.; Jorgensen, Erik M.
Abstract:
Intercellular calcium waves can be observed in adult tissues, but whether they are instructive, permissive, or even required for behavior is predominantly unknown. In the nematode Caenorhabditis elegans, a periodic calcium spike in a pacemaker cell initiates a calcium wave in the intestine 1 and 2. The calcium wave is followed by three muscle contractions that comprise the defecation motor program [1]. Normal wave propagation requires the pannexin gap-junction subunit INX-16 at the interfaces of the intestinal cells. In the absence of this gap-junction subunit, calcium waves are frequently absent. The remaining waves are slow, initiate at abnormal locations, or travel in the opposite direction. Abnormal waves are associated with parallel effects in the first step of the motor program: The contractions of the overlying muscles fail to propagate beyond the pacemaker cell, are slow, initiate in abnormal locations, or are reversed. Moreover, the last two motor steps are predominantly absent. Finally, the absence of this gap-junction subunit also affects the reliability of the pacemaker cell; cycle timing is often irregular. These data demonstrate that pannexin gap junctions propagate calcium waves in the C. elegans intestine. The calcium waves instruct the motor steps and regulate the pacemaker cell's authority and reliability.
Citation:
Peters, M. A., T. Teramoto, K. Iwasaki, J. Q. White, et al. 2007. "A Calcium Wave Mediated by Gap Junctions Coordinates a Rhythmic Behavior in C. elegans." Current Biology 17(18): 1601-1608.
Publisher:
Elsevier
DATE ISSUED:
2007
Department:
Biology
Type:
article
PUBLISHED VERSION:
10.1016/j.cub.2007.08.031
PERMANENT LINK:
http://hdl.handle.net/11282/310241

Full metadata record

DC FieldValue Language
dc.contributor.authorPeters, Maureen A.en_US
dc.contributor.authorTeramoto, Takayukien_US
dc.contributor.authorIwasaki, Kouichien_US
dc.contributor.authorWhite, Jamie Q.en_US
dc.contributor.authorJorgensen, Erik M.en_US
dc.date.accessioned2013-12-23T16:28:45Z-
dc.date.available2013-12-23T16:28:45Z-
dc.date.issued2007en
dc.identifier.citationPeters, M. A., T. Teramoto, K. Iwasaki, J. Q. White, et al. 2007. "A Calcium Wave Mediated by Gap Junctions Coordinates a Rhythmic Behavior in C. elegans." Current Biology 17(18): 1601-1608.en_US
dc.identifier.issn0960-9822en_US
dc.identifier.urihttp://hdl.handle.net/11282/310241-
dc.description.abstractIntercellular calcium waves can be observed in adult tissues, but whether they are instructive, permissive, or even required for behavior is predominantly unknown. In the nematode Caenorhabditis elegans, a periodic calcium spike in a pacemaker cell initiates a calcium wave in the intestine 1 and 2. The calcium wave is followed by three muscle contractions that comprise the defecation motor program [1]. Normal wave propagation requires the pannexin gap-junction subunit INX-16 at the interfaces of the intestinal cells. In the absence of this gap-junction subunit, calcium waves are frequently absent. The remaining waves are slow, initiate at abnormal locations, or travel in the opposite direction. Abnormal waves are associated with parallel effects in the first step of the motor program: The contractions of the overlying muscles fail to propagate beyond the pacemaker cell, are slow, initiate in abnormal locations, or are reversed. Moreover, the last two motor steps are predominantly absent. Finally, the absence of this gap-junction subunit also affects the reliability of the pacemaker cell; cycle timing is often irregular. These data demonstrate that pannexin gap junctions propagate calcium waves in the C. elegans intestine. The calcium waves instruct the motor steps and regulate the pacemaker cell's authority and reliability.en_US
dc.publisherElsevieren_US
dc.identifier.doi10.1016/j.cub.2007.08.031-
dc.subject.departmentBiologyen_US
dc.titleA Calcium Wave Mediated by Gap Junctions Coordinates a Rhythmic Behavior in C. Elegansen_US
dc.typearticleen_US
dc.identifier.journalCurrent Biologyen_US
dc.identifier.volume17en_US
dc.identifier.issue18en_US
dc.identifier.startpage1601en_US
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