title: Antiviral activity in sera of patients with Crohn's disease.
abstract: Sera from patients with Crohn's disease were tested for antiviral activity using a microtiter assay with end points showing 50% reduction of cytopathic effects. Patients were significantly more likely to have serum antiviral activity equivalent to interferon levels of 20 or more units/ml than were control subjects. The mean antiviral activity in the patients' sera (34 +/- 20 (s.d.) units/ml) was significantly greater than that in the control subjects' sera (0.6 +/- 1.7 (s.d.) units/ml). Following acidification the mean antiviral activity of the patients' sera (28 +/- 17 (s.d.) units/ml) had not changed significantly while heat inactivation resulted in significant loss of activity (7.5 +/- 2.7 (s.d.) units/ml). These findings are suggestive of the presence of circulating leucocyte interferon in the sera of patients with Crohn's disease.
mesh_terms: D000293:Adolescent; D000328:Adult; D003424:Crohn Disease / Q000097:blood*; D005260:Female; D006801:Humans; D007370:Interferon Type I / Q000097:blood*; D008297:Male; D008875:Middle Aged
chemical_list: D007370:Interferon Type I