RT Journal Article SR Electronic T1 5,10,15,20-Tetrakis(4-sulfonatophenyl)porphyrin Zinc and Chloro-aluminum Phthalocyanine Disulfonate in Photodynamic Therapy of Colorectal Adenocarcinoma In Vitro JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 4339 OP 4346 DO 10.21873/anticanres.17263 VO 44 IS 10 A1 HOSIK, JAKUB A1 HOSIKOVA, BARBORA A1 KOLAROVA, HANA A1 BAJGAR, ROBERT YR 2024 UL http://ar.iiarjournals.org/content/44/10/4339.abstract AB Background/Aim: Colorectal cancer (CRC) is one of the most widespread malignancies. One of the alternative therapeutic methods appears to be photodynamic therapy (PDT). Materials and Methods: This study investigated the efficiency of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin zinc (ZnTPPS4) and chloro-aluminum phthalocyanine disulfonate (ClAlPcS2) with two commercial photosensitive compounds 5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrin (TMPyP) and tetramethylthionine chloride (methylene blue, MB) in PDT for CRC in vitro. In addition to the study of the photodynamic effect on the viability of the colorectal carcinoma cell line HT29, cellular uptake, ROS production, and DNA damage were investigated. Results: All photosensitizers showed good accumulation within HT29 cells, high efficiency in killing the cells, and a concentration-dependent increase in the production of ROS. Conclusion: PDT using ZnTPPS4 and ClAlPcS2 may be effective in the treatment of CRC, achieving a similar photocytotoxic effect at much lower concentrations compared to MB.