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Related Experiment Videos

Viral antibodies in normal tears.

P K Coyle1, P A Sibony

  • 1Department of Neurology, SUNY, Stony Brook 11794.

Investigative Ophthalmology & Visual Science
|October 1, 1988
PubMed
Summary

Normal tears contain antibodies to common viruses like herpes simplex type I (HSVI) and Epstein-Barr virus (EBV). These tear antibodies, primarily IgA, offer immune defense and can exist independently of serum antibodies.

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Area of Science:

  • Ophthalmology
  • Immunology
  • Virology

Background:

  • Viruses frequently cause eye infections.
  • Tear antibodies are crucial for mucosal immune defense against ocular viruses.
  • Limited data exists on the viral specificity of normal tear immunoglobulins.

Purpose of the Study:

  • To investigate the viral specificity of immunoglobulins in normal human tears.
  • To compare tear antibody profiles with those in parotid saliva and serum.
  • To understand the role of tear antibodies in ocular viral immunity.

Main Methods:

  • Collected tears, parotid saliva, and serum from 40 healthy individuals.
  • Utilized enzyme-linked immunosorbent assay (ELISA) to detect antibodies against seven common mucosal viruses.
  • Analyzed immunoglobulin classes (IgA, IgG) of detected viral antibodies.

Main Results:

  • Normal tears commonly contained antibodies to herpes simplex type I (HSVI) and Epstein-Barr virus (EBV).
  • Antibodies to mumps, rubella, and varicella-zoster virus (VZV) were occasionally found; cytomegalovirus (CMV) antibodies were rare.
  • Tear and parotid saliva immunoglobulin reactivity differed significantly; tear antibodies often mirrored serum antibodies, but not always.

Conclusions:

  • Normal tear immunoglobulins possess antibodies against common viruses, notably HSVI and EBV.
  • Tear antibodies are predominantly IgA but can include IgG, indicating diverse immune responses.
  • The distinct viral reactivity in tears versus saliva suggests localized immune responses and B lymphocyte homing to specific mucosal sites.

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