Indomethacin augments inhibitory effects of interferons on lymphoproliferative response.

Lectin-induced lymphoproliferative response was enhanced by the addition of indomethacin to the culture and in contrast, suppressed by the addition of interferon. However, when indomethacin and interferon were concomitantly present in the lectin-driven cultures, the suppressive effect of interferon on the lymphocyte blastogenesis surpassed the enhancing effect of indomethacin on the response. Furthermore, and unexpectedly, the inhibitory effect on the response due to interferon was definitely augmented in the presence of indomethacin as compared with the response in the absence of indomethacin.