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dc.contributor.author
Cantero, Maria del Rocio  
dc.contributor.author
Pérez, Paula Luciana  
dc.contributor.author
Smoler, Mariano  
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Villa Etchegoyen, Cecilia  
dc.contributor.author
Cantiello, Horacio Fabio  
dc.date.available
2018-06-07T18:29:41Z  
dc.date.issued
2016-06  
dc.identifier.citation
Cantero, Maria del Rocio; Pérez, Paula Luciana; Smoler, Mariano; Villa Etchegoyen, Cecilia; Cantiello, Horacio Fabio; Electrical Oscillations in Two-Dimensional Microtubular Structures; Nature Publishing Group; Scientific Reports; 6; 6-2016; 1-16  
dc.identifier.issn
2045-2322  
dc.identifier.uri
http://hdl.handle.net/11336/47724  
dc.description.abstract
Microtubules (MTs) are unique components of the cytoskeleton formed by hollow cylindrical structures of αβ tubulin dimeric units. The structural wall of the MT is interspersed by nanopores formed by the lateral arrangement of its subunits. MTs are also highly charged polar polyelectrolytes, capable of amplifying electrical signals. The actual nature of these electrodynamic capabilities remains largely unknown. Herein we applied the patch clamp technique to two-dimensional MT sheets, to characterize their electrical properties. Voltage-clamped MT sheets generated cation-selective oscillatory electrical currents whose magnitude depended on both the holding potential, and ionic strength and composition. The oscillations progressed through various modes including single and double periodic regimes and more complex behaviours, being prominent a fundamental frequency at 29 Hz. In physiological K+ (140 mM), oscillations represented in average a 640% change in conductance that was also affected by the prevalent anion. Current injection induced voltage oscillations, thus showing excitability akin with action potentials. The electrical oscillations were entirely blocked by taxol, with pseudo Michaelis-Menten kinetics and a KD of ~1.29 μM. The findings suggest a functional role of the nanopores in the MT wall on the genesis of electrical oscillations that offer new insights into the nonlinear behaviour of the cytoskeleton.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Nature Publishing Group  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Microtúbulos  
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Oscilaciones  
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Patch Clamp  
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Otras Ciencias Biológicas  
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Ciencias Biológicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Electrical Oscillations in Two-Dimensional Microtubular Structures  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-06-07T14:28:37Z  
dc.journal.volume
6  
dc.journal.pagination
1-16  
dc.journal.pais
Reino Unido  
dc.journal.ciudad
Londres  
dc.description.fil
Fil: Cantero, Maria del Rocio. Universidad de Buenos Aires. Facultad de Odontología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Pérez, Paula Luciana. Universidad de Buenos Aires. Facultad de Odontología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Smoler, Mariano. Universidad de Buenos Aires. Facultad de Odontología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.description.fil
Fil: Villa Etchegoyen, Cecilia. Universidad de Buenos Aires. Facultad de Odontología; Argentina  
dc.description.fil
Fil: Cantiello, Horacio Fabio. Universidad de Buenos Aires. Facultad de Odontología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.journal.title
Scientific Reports  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1038/srep27143  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/srep27143