HomeAbout the InstituteResearch UnitsPeopleLinksPh.D ProgramEnglish Language Idioma EspañolWeb SearchIntranet Access
 
 
Research highlights About the institute
Hyaluronan modulates TRPV1 channel opening, reducing peripheral nociceptor activity and pain.

Nat Commun. 2015 Aug 27; 6:8095

Caires R, Luis E, Taberner FJ, Fernandez-Ballester G, Ferrer-Montiel A, Balazs EA, Gomis A, Belmonte C, de la Peña E.

Hyaluronan (HA) is present in the extracellular matrix of all body tissues, including synovial fluid in joints, in which it behaves as a filter that buffers transmission of mechanical forces to nociceptor nerve endings thereby reducing pain. Using recombinant systems, mouse-cultured dorsal root ganglia (DRG) neurons and in vivo experiments, we found that HA also modulates polymodal transient receptor potential vanilloid subtype 1 (TRPV1) channels. HA diminishes heat, pH and capsaicin (CAP) responses, thus reducing the opening probability of the channel by stabilizing its closed state. Accordingly, in DRG neurons, HA decreases TRPV1-mediated impulse firing and channel sensitization by bradykinin. Moreover, subcutaneous HA injection in mice reduces heat and capsaicin nocifensive responses, whereas the intra-articular injection of HA in rats decreases capsaicin joint nociceptor fibres discharge. Collectively, these results indicate that extracellular HA reduces the excitability of the ubiquitous TRPV1 channel, thereby lowering impulse activity in the peripheral nociceptor endings underlying pain.

Research highlights

Research Highlights Archive

CSIC-UMH
 
 
Consejo Superior de Investigaciones Científicas
Universidad Miguel Hernández

Campus de San Juan | Sant Joan d’Alacant
Alicante | España

in@umh.es
direccion.in@umh.es
Tel. + 34 965 23 37 00
Fax + 34 965 91 95 61
© 2004-2016 Instituto de Neurociencias
Alicante | España | Legal Note | Mapa Web
Diseño web Digital Nature