The novel apolipoprotein E-based peptide COG1410 improves sensorimotor performance and reduces injury magnitude following cortical contusion injury

J Neurotrauma. 2007 Jul;24(7):1108-18. doi: 10.1089/neu.2006.0254.

Abstract

It has previously been shown that small peptide molecules derived from the apolipoprotein E (ApoE) receptor binding region are anti-inflammatory in nature and can improve outcome following head injury. The present study evaluated the preclinical efficacy of COG1410, a small molecule ApoE-mimetic peptide (1410 daltons), following cortical contusion injury (CCI). Animals were prepared with a unilateral CCI of the sensorimotor cortex (SMC) or sham procedure. Thirty mins post-CCI the animals received i.v. infusions of 0.8 mg/kg COG1410, 0.4 mg/kg COG1410, or vehicle. Starting on day 2, the animals were tested on a battery of behavioral measures to assess sensorimotor (vibrissae-forelimb placing and forelimb use-asymmetry), and motor (tapered balance beam) performance. Administration of the 0.8 mg/kg dose of COG1410 significantly improved recovery on the vibrissae-forelimb and limb asymmetry tests. However, no facilitation was observed on the tapered beam. The low dose (0.4 mg/kg) of COG1410 did not show any significant differences compared to vehicle. Lesion analysis revealed that the 0.8 mg/kg dose of COG1410 significantly reduced the size of the injury cavity compared to the 0.4 mg/kg dose and vehicle. The 0.8 mg/kg dose also reduced the number of glial fibrillary acid protein (GFAP+) reactive cells in the injured cortex. These results suggest that a single dose of COG1410 facilitates behavioral recovery and provides neuroprotection in a dose and task-dependent manner. Thus, the continued clinical development of ApoE based therapeutics is warranted and could represent a novel strategy for the treatment of traumatic brain injuries.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Anti-Inflammatory Agents / pharmacology
  • Anti-Inflammatory Agents / therapeutic use
  • Apolipoproteins E / antagonists & inhibitors*
  • Apolipoproteins E / metabolism
  • Apolipoproteins E / pharmacology
  • Apolipoproteins E / therapeutic use
  • Astrocytes / drug effects
  • Astrocytes / metabolism
  • Astrocytes / pathology
  • Brain Injuries / drug therapy*
  • Brain Injuries / metabolism
  • Brain Injuries / physiopathology
  • Disease Models, Animal
  • Dose-Response Relationship, Drug
  • Glial Fibrillary Acidic Protein / drug effects
  • Glial Fibrillary Acidic Protein / metabolism
  • Gliosis / drug therapy
  • Gliosis / etiology
  • Gliosis / physiopathology
  • Male
  • Movement / drug effects
  • Movement / physiology
  • Movement Disorders / drug therapy*
  • Movement Disorders / etiology
  • Movement Disorders / physiopathology
  • Nerve Degeneration / drug therapy*
  • Nerve Degeneration / metabolism
  • Nerve Degeneration / physiopathology
  • Neuroprotective Agents / pharmacology
  • Neuroprotective Agents / therapeutic use
  • Peptides / pharmacology*
  • Peptides / therapeutic use
  • Rats
  • Rats, Sprague-Dawley
  • Recovery of Function / drug effects
  • Recovery of Function / physiology
  • Treatment Outcome

Substances

  • Anti-Inflammatory Agents
  • Apolipoproteins E
  • COG1410
  • Glial Fibrillary Acidic Protein
  • Neuroprotective Agents
  • Peptides