PMID- 23914299 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20131111 LR - 20220317 IS - 2072-6694 (Print) IS - 2072-6694 (Electronic) IS - 2072-6694 (Linking) VI - 3 IP - 2 DP - 2011 TI - Cell death pathways in photodynamic therapy of cancer. PG - 2516-39 LID - 10.3390/cancers3022516 [doi] AB - Photodynamic therapy (PDT) is an emerging cancer therapy that uses the combination of non-toxic dyes or photosensitizers (PS) and harmless visible light to produce reactive oxygen species and destroy tumors. The PS can be localized in various organelles such as mitochondria, lysosomes, endoplasmic reticulum, Golgi apparatus and plasma membranes and this sub-cellular location governs much of the signaling that occurs after PDT. There is an acute stress response that leads to changes in calcium and lipid metabolism and causes the production of cytokines and stress response mediators. Enzymes (particularly protein kinases) are activated and transcription factors are expressed. Many of the cellular responses center on mitochondria and frequently lead to induction of apoptosis by the mitochondrial pathway involving caspase activation and release of cytochrome c. Certain specific proteins (such as Bcl-2) are damaged by PDT-induced oxidation thereby increasing apoptosis, and a build-up of oxidized proteins leads to an ER-stress response that may be increased by proteasome inhibition. Autophagy plays a role in either inhibiting or enhancing cell death after PDT. FAU - Mroz, Pawel AU - Mroz P AD - Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02114, USA ; Department of Dermatology, Harvard Medical School, Boston, MA 02114, USA. FAU - Yaroslavsky, Anastasia AU - Yaroslavsky A FAU - Kharkwal, Gitika B AU - Kharkwal GB FAU - Hamblin, Michael R AU - Hamblin MR LA - eng GR - R01 AI050875/AI/NIAID NIH HHS/United States PT - Journal Article PL - Switzerland TA - Cancers (Basel) JT - Cancers JID - 101526829 PMC - PMC3729395 MID - NIHMS486481 OTO - NOTNLM OT - apoptosis OT - autophagy OT - cancer OT - cell death OT - necrosis OT - photodynamic therapy EDAT- 2011/01/01 00:00 MHDA- 2011/01/01 00:01 PMCR- 2011/06/03 CRDT- 2013/08/06 06:00 PHST- 2013/08/06 06:00 [entrez] PHST- 2011/01/01 00:00 [pubmed] PHST- 2011/01/01 00:01 [medline] PHST- 2011/06/03 00:00 [pmc-release] AID - cancers-03-02516 [pii] AID - 10.3390/cancers3022516 [doi] PST - ppublish SO - Cancers (Basel). 2011;3(2):2516-39. doi: 10.3390/cancers3022516.