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BACKGROUND An example of plant-derived compounds that may be of great importance in oncological therapy is emodin. The aim of this study was to evaluate the range of changes in the lysosomal compartment of HeLa cervical cancer cells treated with emodin. MATERIALS AND METHODS Changes in the lysosomal compartment were evaluated using microscopic techniques. In order to evaluate the activity of lysosomal enzymes and the permeability of the lysosomal membrane, a spectrophotometric technique was employed. RESULTS Emodin induced significant changes in the lysosomal compartment, manifesting as an increase in the number of lysosomes, autophagic vacuoles and the activity of lysosomal hydrolases. Emodin exhibited cytotoxic activity against lysosomes through lysosomal membrane damage with possible leaks of lysosomal hydrolases into the cytoplasm. CONCLUSION Emodin induces degradation processes and promotes the death of tumor cells through a mechanism that occurs with clear involvement of the lysosomal compartment.