Abstract
Cultured cells ofThalictrum flavum take up berberine exogenously added to medium against the concentration gradient. This uptake was temperature-dependent and sensitive to plasma membrane-bound ATPase inhibitors such as sodium orthovanadate and diethylstilbestrol, indicating that the process is mediated by an energy-requiring system. The time-course of pH-shift during berberine uptake suggests the participation of a berberine-proton antiport system in the berberine uptake by the cultured cells. In addition, the existence of a specific transport system was suggested by the competitive inhibition of berberine uptake by berberine analogues, coptisine and jatrorrhizine.
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Yamamoto, H., Suzuki, M., Kitamura, T. et al. Energy-requiring uptake of protoberberine alkaloids by cultured cells ofThalictrum flavum . Plant Cell Reports 8, 361–364 (1989). https://doi.org/10.1007/BF00716674
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DOI: https://doi.org/10.1007/BF00716674