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Skin Immunization Obviates Alcohol-Related Immune Dysfunction.

Rhonda M Brand1,2,3, John Mark Stottlemyer4, Rachel A Cline5

  • 1Department of Dermatology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA. rmb91@pitt.edu.

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Summary

Ethanol consumption impairs traditional vaccines. However, skin-targeted vaccines remain effective in alcohol-exposed individuals, suggesting a potential strategy for improved vaccination in alcohol users.

Keywords:
Lieber-DeCarliMeadows-Cookalcoholethanolintradermal immunizationskinskin immunityvaccination

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Area of Science:

  • Immunology
  • Vaccinology
  • Toxicology

Background:

  • Alcohol consumption leads to immune dysfunction, potentially reducing vaccine efficacy.
  • Ethanol (EtOH) exposure may directly impair immune cells, contributing to immunosuppression.
  • Skin has lower EtOH levels than blood, suggesting its immune network might be preserved.

Purpose of the Study:

  • To investigate if skin-targeted immunizations can overcome alcohol-induced immune suppression.
  • To compare the efficacy of systemic versus cutaneous vaccination in chronic alcohol-consuming mice.
  • To examine the impact of ethanol and liver dysfunction on immune responses.

Main Methods:

  • Utilized two chronic EtOH mouse feeding models (Lieber-DeCarli and Meadows-Cook).
  • Administered ovalbumin (OVA) via DNA immunization or influenza vaccine via systemic (IV, IM), hydrodynamic, or cutaneous (biolistic, ID) routes.
  • Measured tissue EtOH levels, liver stress, immune cell populations (Treg, MDSC), delayed-type hypersensitivity (DTH), cytotoxic T lymphocyte (CTL) activity, and antibody induction.

Main Results:

  • Ethanol ingestion significantly inhibited DTH, CTL lysis, and total IgG antibody induction for systemic vaccines, irrespective of the feeding model.
  • Cutaneous vaccination routes (biolistic, ID) elicited comparable immunogenicity in both alcohol-exposed and non-exposed mice.
  • Ethanol exposure did not universally impair all immune responses, particularly those related to skin-targeted vaccines.

Conclusions:

  • Skin-targeted vaccination strategies may be more effective in individuals who consume alcohol.
  • Cutaneous immunization appears to circumvent the immunosuppressive effects of ethanol seen with conventional systemic vaccines.
  • Preservation of the skin immune network offers a potential avenue for enhancing vaccine efficacy in alcohol users.