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Abstract
Fifty-one extracts, from six Panamanian plants species selected on the basis of their toxicities against Artemia salina, belonging to five families and five genera, were screened for their in vitro anticancer (TK-10, UACC-62, MCF-7) and immunomodulatory activities [inhibition of complement, classical (CP) and alternative (AP) complement pathway and lymphoproliferation]. The results showed that 9 (17.6%) of 51 extracts presented anticancer activity against cancer cell lines, while 28 (54.9%) of 51 extracts stimulated normal spleen cells proliferation, and 25 (49.0%) inhibited in vitro lymphoid tumor cell growth. Finally, 7 (19.4%) and 10 (27.8%) out of 36 extracts showed high and moderate anticomplementary activity on CP, respectively. Moreover, out of 36 extracts, 1 (2.8%) produced higher inhibition while 4 (11.1%) showed moderate inhibition in the alternate pathway. The dichloromethane, methanolic and aqueous extracts from the leaf (3.0, 3.2, 4.2) and branch (3.5, 5.7, 5.8) of Trichospermum galeottii and from the leaf (2.4, 2.5, 5.6) and stem (2.3, 2.3, 4.7) of Sauraria yasicae were the most active immunomodulatory plants. The dichloromethane extract from the root of Morinda panamensis (8.7, 4.4, 6.3) was active against the three cancer cell lines, while the dichloromethane extract from the bark of Trichospermum galeottii(TK-10 = 3.4,UACC-62 = 9.4) and the bark of Morinda panamensis (UACC-62 = 5.5, MCF-7 = 5.9) as well as the methanolic extract from the root of Morinda rojoc (UACC-62 = 9.2, MCF-7 = 9.4) exhibited selectivity against two cancer cell lines.