Antineuropathic profile of N-palmitoylethanolamine in a rat model of oxaliplatin-induced neurotoxicity

PLoS One. 2015 Jun 3;10(6):e0128080. doi: 10.1371/journal.pone.0128080. eCollection 2015.

Abstract

Neurotoxicity is a main side effect of the anticancer drug oxaliplatin. The development of a neuropathic syndrome impairs quality of life and potentially results in chemotherapy dose reductions and/or early discontinuation. In the complex pattern of molecular and morphological alterations induced by oxaliplatin in the nervous system, an important activation of glia has been preclinically evidenced. N-Palmitoylethanolamine (PEA) modulates glial cells and exerts antinociceptive effects in several animal models. In order to improve the therapeutic chances for chemotherapy-dependent neuropathy management, the role of PEA was investigated in a rat model of oxaliplatin-induced neuropathy (2.4 mg kg-1 daily, intraperitoneally). On day 21, a single administration of PEA (30 mg kg-1 i.p.) was able to reduce oxaliplatin-dependent pain induced by mechanical and thermal stimuli. The repeated treatment with PEA (30 mg kg-1 daily i.p. for 21 days, from the first oxaliplatin injection) prevented lowering of pain threshold as well as increased pain on suprathreshold stimulation. Ex vivo histological and molecular analysis of dorsal root ganglia, peripheral nerves and spinal cord highlighted neuroprotective effects and glia-activation prevention induced by PEA repeated administration. The protective effect of PEA resulted in the normalization of the electrophysiological activity of the spinal nociceptive neurons. Finally, PEA did not alter the oxaliplatin-induced mortality of the human colon cancer cell line HT-29. The efficacy of PEA in neuropathic pain control and in preventing nervous tissue alteration candidates this endogenous compound as disease modifying agent. These characteristics, joined to the safety profile, suggest the usefulness of PEA in chemotherapy-induced neuropathy.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Activating Transcription Factor 3 / metabolism
  • Amides
  • Animals
  • Behavior, Animal / drug effects
  • Disease Models, Animal
  • Ethanolamines / pharmacology
  • Ethanolamines / therapeutic use*
  • Ganglia, Spinal / drug effects
  • Ganglia, Spinal / pathology
  • HT29 Cells
  • Humans
  • Inflammation Mediators / metabolism
  • Male
  • Nervous System / drug effects
  • Nervous System / pathology
  • Neuralgia / complications
  • Neuralgia / drug therapy
  • Neuroglia / drug effects
  • Neuroglia / metabolism
  • Neuroglia / pathology
  • Neurons / drug effects
  • Neurons / metabolism
  • Neurons / pathology
  • Neurotoxicity Syndromes / complications
  • Neurotoxicity Syndromes / drug therapy*
  • Neurotoxicity Syndromes / pathology
  • Organoplatinum Compounds / adverse effects*
  • Oxaliplatin
  • Palmitic Acids / pharmacology
  • Palmitic Acids / therapeutic use*
  • Rats, Sprague-Dawley

Substances

  • Activating Transcription Factor 3
  • Amides
  • Atf3 protein, rat
  • Ethanolamines
  • Inflammation Mediators
  • Organoplatinum Compounds
  • Palmitic Acids
  • Oxaliplatin
  • palmidrol

Grants and funding

This research was funded by the Italian Ministry of Instruction, University and Research (MIUR), by the University of Florence and by Programma Operativo Nazionale (PON01_02512).