Copolymer-1 promotes neurogenesis and improves functional recovery after acute ischemic stroke in rats

PLoS One. 2015 Mar 30;10(3):e0121854. doi: 10.1371/journal.pone.0121854. eCollection 2015.

Abstract

Stroke triggers a systemic inflammatory response that exacerbates the initial injury. Immunizing with peptides derived from CNS proteins can stimulate protective autoimmunity (PA). The most renowned of these peptides is copolymer-1 (Cop-1) also known as glatiramer acetate. This peptide has been approved for use in the treatment of multiple sclerosis. Cop-1-specific T cells cross the blood-brain barrier and secrete neurotrophins and anti-inflammatory cytokines that could stimulate proliferation of neural precursor cells and recruit them to the injury site; making it an ideal therapy for acute ischemic stroke. The aim of this work was to evaluate the effect of Cop-1 on neurogenesis and neurological recovery during the acute phase (7 days) and the chronic phase of stroke (60 days) in a rat model of transient middle cerebral artery occlusion (tMCAo). BDNF and NT-3 were quantified and infarct volumes were measured. We demonstrated that Cop-1 improves neurological deficit, enhances neurogenesis (at 7 and 60 days) in the SVZ, SGZ, and cerebral cortex through an increase in NT-3 production. It also decreased infarct volume even at the chronic phase of tMCAo. The present manuscript fortifies the support for the use of Cop-1 in acute ischemic stroke.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Blood-Brain Barrier / metabolism
  • Brain Ischemia / drug therapy*
  • Brain Ischemia / metabolism
  • Cerebral Cortex / drug effects
  • Cerebral Cortex / metabolism
  • Infarction, Middle Cerebral Artery / drug therapy
  • Infarction, Middle Cerebral Artery / metabolism
  • Male
  • Multiple Sclerosis / drug therapy
  • Multiple Sclerosis / metabolism
  • Nerve Growth Factors / metabolism
  • Neurogenesis / drug effects*
  • Neuroprotective Agents / pharmacology
  • Peptides / pharmacology*
  • Rats
  • Rats, Sprague-Dawley
  • Recovery of Function / drug effects*
  • Stroke / drug therapy*
  • Stroke / metabolism

Substances

  • Nerve Growth Factors
  • Neuroprotective Agents
  • Peptides
  • (T,G)-A-L

Grants and funding

This publication was funded by the CONACyT (Grant #57204). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.