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Researchers from Peoples' Friendship University of Russia (RUDN University) have conducted studies on membrane transport proteins and their role in the accumulation of protoporphyrin IX in tumor cells when using 5-aminolevulinic acid (5-ALA) for photodynamic therapy. The research highlights the importance of the expression of specific transporters in predicting the effectiveness of this therapy in malignant tissues. The study provides insights into the relationship between the expression of transport proteins and the synthesis and concentration of protoporphyrin IX. For more information, readers can refer to the article "The role of membrane transport proteins in 5-ALA-induced accumulation of protoporphyrin IX in tumor cells" in Biomedical Photonics. [Extracted from the article]