Prenatal alcohol exposure potentiates chronic neuropathic pain, spinal glial and immune cell activation and alters sciatic nerve and DRG cytokine levels

Shahani Noor, Joshua J. Sanchez, Arden G. Vanderwall, Melody S. Sun, Jessie R. Maxwell, Suzy Davies, Lauren Jantzie, Timothy R. Petersen, Daniel D. Savage, Erin D. Milligan

Research output: Contribution to journalArticle

Abstract

A growing body of evidence indicates that prenatal alcohol exposure (PAE) may predispose individuals to secondary medical disabilities later in life. Animal models of PAE reveal neuroimmune sequelae such as elevated brain astrocyte and microglial activation with corresponding region-specific changes in immune signaling molecules such as cytokines and chemokines. The aim of this study was to evaluate the effects of moderate PAE on the development and maintenance of allodynia induced by chronic constriction injury (CCI) of the sciatic nerve in adult male rat offspring. Because CCI allodynia requires the actions of glial cytokines, we analyzed lumbar spinal cord glial and immune cell surface markers indicative of their activation levels, as well as sciatic nerve and dorsal root ganglia (DRG) cytokines in PAE offspring in adulthood. While PAE did not alter basal sensory thresholds before or after sham manipulations, PAE significantly potentiated adult onset and maintenance of allodynia. Microscopic analysis revealed exaggerated astrocyte and microglial activation, while flow cytometry data demonstrated increased proportions of immune cells with cell surface major histocompatibility complex II (MHCII) and β-integrin adhesion molecules, which are indicative of PAE-induced immune cell activation. Sciatic nerves from CCI rats revealed that PAE potentiated the proinflammatory cytokines interleukin (IL)-1β, IL-6 and tumor necrosis factor-alpha (TNFα) protein levels with a simultaneous robust suppression of the anti-inflammatory cytokine, IL-10. A profound reduction in IL-10 expression in the DRG of PAE neuropathic rats was also observed. Taken together, our results provide novel insights into the vulnerability that PAE produces for adult-onset central nervous system (CNS) pathological conditions from peripheral nerve injury.

Original languageEnglish (US)
Pages (from-to)80-95
Number of pages16
JournalBrain, Behavior, and Immunity
Volume61
DOIs
StatePublished - Mar 1 2017
Externally publishedYes

Fingerprint

Spinal Ganglia
Neuralgia
Sciatic Nerve
Neuroglia
Chronic Pain
Alcohols
Cytokines
Hyperalgesia
Constriction
Astrocytes
Interleukin-10
Spinal Cord
Wounds and Injuries
Maintenance
Sensory Thresholds
Peripheral Nerve Injuries
Major Histocompatibility Complex
Interleukin-1
Chemokines
Integrins

Keywords

  • Astrocytes
  • Chronic constriction injury
  • Fetal alcohol spectrum disorder
  • Inflammatory cytokines
  • Microglia
  • Neuroimmune interactions
  • Neuropathic pain
  • Prenatal alcohol exposure
  • Sciatic nerve
  • Spinal glia
  • β-Integrin adhesion molecules

ASJC Scopus subject areas

  • Immunology
  • Endocrine and Autonomic Systems
  • Behavioral Neuroscience

Cite this

Prenatal alcohol exposure potentiates chronic neuropathic pain, spinal glial and immune cell activation and alters sciatic nerve and DRG cytokine levels. / Noor, Shahani; Sanchez, Joshua J.; Vanderwall, Arden G.; Sun, Melody S.; Maxwell, Jessie R.; Davies, Suzy; Jantzie, Lauren; Petersen, Timothy R.; Savage, Daniel D.; Milligan, Erin D.

In: Brain, Behavior, and Immunity, Vol. 61, 01.03.2017, p. 80-95.

Research output: Contribution to journalArticle

Noor, Shahani ; Sanchez, Joshua J. ; Vanderwall, Arden G. ; Sun, Melody S. ; Maxwell, Jessie R. ; Davies, Suzy ; Jantzie, Lauren ; Petersen, Timothy R. ; Savage, Daniel D. ; Milligan, Erin D. / Prenatal alcohol exposure potentiates chronic neuropathic pain, spinal glial and immune cell activation and alters sciatic nerve and DRG cytokine levels. In: Brain, Behavior, and Immunity. 2017 ; Vol. 61. pp. 80-95.
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AU - Sun, Melody S.

AU - Maxwell, Jessie R.

AU - Davies, Suzy

AU - Jantzie, Lauren

AU - Petersen, Timothy R.

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