The antitumor drug paclitaxel (Taxol) has been demonstrated to be a li
popolysaccharide mimetic in murine macrophages. In this study, the cap
acity of paclitaxel to activate macrophages to become microbicidal for
Leishmania major was examined. Paclitaxel and gamma interferon synerg
ized to kill intracellular L. major in Lps(n), but not Lps(d), macroph
ages by a nitric oxide (NO.)-dependent mechanism.