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Anti-adenoviral effect of interferon-β and interferon-γ in serotypes that cause acute keratoconjunctivitis

Eiichi Uchio1, Hirotoshi Inoue, Aki Fuchigami

  • 1Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka,Japan. euchio@fukuoka-u.ac.jp

Clinical & Experimental Ophthalmology
|November 13, 2010
PubMed
Abstract

Insights

Interferon-beta and interferon-gamma demonstrate in vitro anti-adenoviral activity against key serotypes. These findings suggest potential for treating adenoviral keratoconjunctivitis, pending further trials.

Area of Science:

  • Virology
  • Immunology
  • Ophthalmology

Background:

  • Interferons are established treatments for hepatitis B and C virus infections.
  • The efficacy of interferons against adenovirus, particularly in causing acute keratoconjunctivitis, remains largely unelucidated.
  • Previous studies indicated potential effectiveness of interferon-beta and interferon-gamma against adenovirus serotype 3.

Purpose of the Study:

  • To investigate the in vitro anti-adenoviral effects of interferon-beta and interferon-gamma.
  • To evaluate the efficacy of these interferons against adenovirus serotypes responsible for acute keratoconjunctivitis.
  • To determine the dose-dependent inhibitory effects and quantify the 50% effective concentration (EC50) for each interferon-adenovirus serotype combination.

Main Methods:

  • An experimental in vitro study was conducted using A549 cells.
  • Five adenovirus serotypes (AdV3, AdV4, AdV8, AdV19a, AdV37) and interferon-beta and interferon-gamma were utilized.
  • Adenoviral DNA was quantified using real-time polymerase chain reaction after 24-hour interferon pretreatment and 7-day adenovirus cultivation.

Main Results:

  • Interferon-beta exhibited a dose-dependent inhibitory effect across all tested adenovirus serotypes, with EC50 values ranging from 211 to 843 IU/mL.
  • Interferon-gamma also demonstrated a dose-dependent anti-adenoviral effect, with EC50 values ranging from 133 to 9130 IU/mL.
  • Interferon-gamma showed the strongest inhibition against AdV37, while AdV4 displayed the lowest sensitivity to interferon-gamma. Dose dependency was statistically significant for both interferons against several serotypes.

Conclusions:

  • Both interferon-beta and interferon-gamma possess significant in vitro anti-adenoviral activity.
  • These interferons show promise for the local treatment of adenoviral keratoconjunctivitis.
  • Further research, including animal model studies and clinical trials, is warranted to confirm therapeutic potential.

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