“Therapy with RA decreased interferon gamma-secreting cell counts, had a minimal positive effect on T suppressor cell function, and had no effect on T-cell proliferation.”
“When RA and interferon beta-1b … combined, the inhibitory effect of RA on interferon gamma-secreting cells predominated, T suppressor cell function increased synergistically over the increment observed with interferon beta-1b use alone, and the inhibitory effect of interferon beta-1b alone on T-cell proliferation remained unchanged.”