Brevican distinctively assembles extracellular components at the large diameter nodes of Ranvier in the CNS

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Brevican is known to be an abundant extracellular matrix component in the adult brain and a structural constituent of perineuronal nets. We herein show that brevican, tenascin-R (TN-R) and phosphacan are present at the nodes of Ranvier on myelinated axons with a particularly large diameter in the central nervous system. A brevican deficiency resulted in a reorganization of the nodal matrices, which was characterized by the shift of TN-R, and concomitantly phosphacan, from an axonal diameter-dependent association with nodes to an axonal diameter independent association. Supported by the co-immunoprecipitation results, these observations indicate that the presence of TN-R and phosphacan at nodes is normally brevican-dependent, while in the absence of brevican these molecules can also be recruited by versican V2. The versican V2 and Bral1 distribution was not affected, thus indicating a brevican-independent role of these two molecules for establishing hyaluronan-binding matrices at the nodes. Our results revealed that brevican plays a crucial role in determining the specialization of the hyaluronan-binding nodal matrix assemblies in large diameter nodes.

Detaljer

Författare
  • Yoko Bekku
  • Uwe Rauch
  • Yoshifumi Ninomiya
  • Toshitaka Oohashi
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Neurovetenskaper

Nyckelord

Originalspråkengelska
Sidor (från-till)1266-1276
TidskriftJournal of Neurochemistry
Volym108
Utgåva nummer5
StatusPublished - 2009
PublikationskategoriForskning
Peer review utfördJa