Abstract
Gossypol, a natural polyphenolic compound, induces growth-inhibitory and antiparasitic effects inTaenia taeniaeformis metacestodes in vivo and in vitro. We investigated the uptake and localization of [3H]-gossypol in this parasite. Metacestodes were incubated in 10−5 M [3H]-gossypol at 37°C. Parasites steadily took up tritium activity over the first 3 h of incubation, after which a plateau was maintained for the duration of the experiment. Tissue: medium radioactivity ratios revealed that intralarval tritium activity matched extralarval activity within 30 min of incubation and continued to increase with time. Reverse-phase high-performance liquid chromatographic (HPLC) analysis confirmed tissue incorporation of tritium activity that manifested as a single radioactive species. Autoradiography localized [3H]-gossypol to the tegument, calcareous corpuscles, and parenchyma over the first 2 h of incubation. By 6 h, parenchymal radioactivity had disappeared.T. taeniaeformis metacestodes rapidly take up and accumulate [3H]-gossypol in vitro. This accumulation is apparently selective for specific sites, which may have implications for gossypol's metacestocidal action.
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Kulp, S.K., Rikihisa, Y., Lin, Y.C. et al. In vitro uptake and autoradiographic localization of tritiated gossypol inTaenia taeniaeformis metacestodes. Parasitol Res 79, 279–285 (1993). https://doi.org/10.1007/BF00932182
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DOI: https://doi.org/10.1007/BF00932182