BACKGROUND: Interferons are currently used for hepatitis B and C virus infection; the effect of interferons against adenovirus has not been elucidated. It has been reported that interferon-β and interferon-γ were effective against adenovirus serotype 3. We investigated the anti-adenoviral effect of interferon-β and interferon-γ in serotypes that cause acute keratoconjunctivitis, using quantitative polymerase chain reaction in vitro. DESIGN: Experimental study carried out in a university. SAMPLES: Five strains of different serotypes of adenovirus, types 3 (AdV3; species B), 4 (species E), 8, 19a and 37 (species D) and interferon-β and interferon-γ for in vitro assay. METHODS: After pretreatment of A549 with serial dilution of interferons for 24 h, adenovirus was cultivated for 7 days, and adenoviral DNA was quantitatively measured by real-time polymerase chain reaction. MAIN OUTCOME MEASURES: Number of virus copies after treatment and the 50% effective concentration (EC(50) ). RESULTS: Interferon-β showed a dose-dependent inhibitory effect on all serotypes. EC(50) of interferon-β ranged between 211 and 843 IU/mL. A similar tendency was observed with interferon-γ. EC(50) of interferon-γ ranged between 133 and 9130 IU/mL. Among the serotypes, interferon-γ exhibited the greatest inhibitory effect on AdV37. In contrast, AdV4 showed the lowest sensitivity to interferon-γ. Statistically significant dose dependency for both interferon-β and interferon-γ was observed in several serotypes. CONCLUSIONS: These results suggest that both interferon-β and interferon-γ have anti-adenoviral activity in vitro. Interferons have the potential to be used for local treatment of adenoviral keratoconjunctivitis, although further evaluation in animal models and clinical trials is necessary.
BACKGROUND: Interferons are currently used for hepatitis B and C virus infection; the effect of interferons against adenovirus has not been elucidated. It has been reported that interferon-β and interferon-γ were effective against adenovirus serotype 3. We investigated the anti-adenoviral effect of interferon-β and interferon-γ in serotypes that cause acute keratoconjunctivitis, using quantitative polymerase chain reaction in vitro. DESIGN: Experimental study carried out in a university. SAMPLES: Five strains of different serotypes of adenovirus, types 3 (AdV3; species B), 4 (species E), 8, 19a and 37 (species D) and interferon-β and interferon-γ for in vitro assay. METHODS: After pretreatment of A549 with serial dilution of interferons for 24 h, adenovirus was cultivated for 7 days, and adenoviral DNA was quantitatively measured by real-time polymerase chain reaction. MAIN OUTCOME MEASURES: Number of virus copies after treatment and the 50% effective concentration (EC(50) ). RESULTS: Interferon-β showed a dose-dependent inhibitory effect on all serotypes. EC(50) of interferon-β ranged between 211 and 843 IU/mL. A similar tendency was observed with interferon-γ. EC(50) of interferon-γ ranged between 133 and 9130 IU/mL. Among the serotypes, interferon-γ exhibited the greatest inhibitory effect on AdV37. In contrast, AdV4 showed the lowest sensitivity to interferon-γ. Statistically significant dose dependency for both interferon-β and interferon-γ was observed in several serotypes. CONCLUSIONS: These results suggest that both interferon-β and interferon-γ have anti-adenoviral activity in vitro. Interferons have the potential to be used for local treatment of adenoviral keratoconjunctivitis, although further evaluation in animal models and clinical trials is necessary.
Authors: Su-Hsun Liu; Barbara S Hawkins; Sueko M Ng; Mark Ren; Louis Leslie; Genie Han; Irene C Kuo Journal: Cochrane Database Syst Rev Date: 2022-03-03
Authors: Eriko Padron-Regalado; Marta Ulaszewska; Alexander D Douglas; Adrian V S Hill; Alexandra J Spencer Journal: Sci Rep Date: 2022-08-24 Impact factor: 4.996