Cell Reports (Aug 2017)

Pericytes Stimulate Oligodendrocyte Progenitor Cell Differentiation during CNS Remyelination

  • Alerie Guzman De La Fuente,
  • Simona Lange,
  • Maria Elena Silva,
  • Ginez A. Gonzalez,
  • Herbert Tempfer,
  • Peter van Wijngaarden,
  • Chao Zhao,
  • Ludovica Di Canio,
  • Andrea Trost,
  • Lara Bieler,
  • Pia Zaunmair,
  • Peter Rotheneichner,
  • Anna O’Sullivan,
  • Sebastien Couillard-Despres,
  • Oihana Errea,
  • Maarja A. Mäe,
  • Johanna Andrae,
  • Liqun He,
  • Annika Keller,
  • Luis F. Bátiz,
  • Christer Betsholtz,
  • Ludwig Aigner,
  • Robin J.M. Franklin,
  • Francisco J. Rivera

DOI
https://doi.org/10.1016/j.celrep.2017.08.007
Journal volume & issue
Vol. 20, no. 8
pp. 1755 – 1764

Abstract

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The role of the neurovascular niche in CNS myelin regeneration is incompletely understood. Here, we show that, upon demyelination, CNS-resident pericytes (PCs) proliferate, and parenchymal non-vessel-associated PC-like cells (PLCs) rapidly develop. During remyelination, mature oligodendrocytes were found in close proximity to PCs. In Pdgfbret/ret mice, which have reduced PC numbers, oligodendrocyte progenitor cell (OPC) differentiation was delayed, although remyelination proceeded to completion. PC-conditioned medium accelerated and enhanced OPC differentiation in vitro and increased the rate of remyelination in an ex vivo cerebellar slice model of demyelination. We identified Lama2 as a PC-derived factor that promotes OPC differentiation. Thus, the functional role of PCs is not restricted to vascular homeostasis but includes the modulation of adult CNS progenitor cells involved in regeneration.

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