Interferon alpha-2 (IFN alpha 2) increases lacrimal and salivary function in Sjögren's syndrome patients. Preliminary results of an open pilot trial versus OH-chloroquine.
OBJECTIVE: The effect of recombinant interferon alpha-2 (IFN alpha 2) therapy in Sjögren's syndrome (SS) was studied. METHODS: An open study was performed in which 20 SS patients were given IFN alpha 2 3.10(6) MU/3 times/week or OH-chloroquine (OH-C) 6 mg/kg/daily, for a mean period of 11 months. RESULTS: Gland assessment showed that lacrimal and salivary function improved by 67% and 61% versus 15% and 18% respectively (p < 0.01) in the patients treated with IFN alpha 2 compared to those treated with OH-C. Immunological parameters did not change over time in either group. In 3 patients a decrease in the tissue score was observed in the IFN alpha 2 group, while no changes were seen in the control group. Tolerability was acceptable. CONCLUSION: This study shows that IFN can improve tear function and dry mouth in SS, without causing significant side effects.