PMID- 18435703 OWN - NLM STAT- MEDLINE DCOM- 20090305 LR - 20211020 IS - 0031-8655 (Print) IS - 1751-1097 (Electronic) IS - 0031-8655 (Linking) VI - 84 IP - 5 DP - 2008 Sep-Oct TI - Immunophototherapy using PDT combined with rapid intratumoral dendritic cell injection. PG - 1257-64 LID - 10.1111/j.1751-1097.2008.00356.x [doi] AB - The capacity of photodynamic therapy (PDT) to induce localized cell death and tissue damage suggests that when applied to tumors it could create a local depot of tumor-associated antigens, which would be available for uptake and presentation to the immune system, potentially leading to improved tumor control. Dendritic cells (DCs) are the most potent cells for antigen uptake, presentation, and stimulation of the immune system. However, it is unclear whether DCs would retain their viability and functional capacity for the requisite trafficking to draining lymph nodes when adoptively transferred in close temporal and anatomic proximity to the site of PDT-induced cytotoxicity. We conducted studies of combined PDT and adoptive DC therapy, "immunophototherapy," in a female, Fisher 344 rat orthotopic mammary tumor model. Using 5-aminolevulinic acid as a pro-drug, we demonstrated kinetically favorable biologic conversion to the photosensitive protoporphyrin IX, appropriate trafficking of syngeneic bone marrow-derived DCs injected into PDT-treated tumors within 15 min of completion of therapy, and improved survival over either modality alone. These data indicate that DCs rapidly administered into the site of PDT retain their viability and functional status, supporting the further evaluation of immunophototherapy strategies. FAU - Sur, Brandon W AU - Sur BW AD - Division of Hematology/Oncology, Department of Medicine, School of Medicine, University of California, Irvine, CA, USA. FAU - Nguyen, Phuong AU - Nguyen P FAU - Sun, Chung-Ho AU - Sun CH FAU - Tromberg, Bruce J AU - Tromberg BJ FAU - Nelson, Edward L AU - Nelson EL LA - eng GR - P30 CA062203/CA/NCI NIH HHS/United States GR - P41 EB015890/EB/NIBIB NIH HHS/United States GR - P41 RR001192/RR/NCRR NIH HHS/United States GR - P41-RR01192/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20080423 PL - United States TA - Photochem Photobiol JT - Photochemistry and photobiology JID - 0376425 RN - 0 (Photosensitizing Agents) RN - 88755TAZ87 (Aminolevulinic Acid) SB - IM MH - Aminolevulinic Acid/pharmacology/*therapeutic use MH - Animals MH - Apoptosis/drug effects MH - Dendritic Cells/*immunology MH - Drug Screening Assays, Antitumor MH - Injections, Intralesional MH - Kinetics MH - Neoplasms, Experimental/drug therapy/immunology/*therapy MH - *Photochemotherapy MH - Photosensitizing Agents/pharmacology/*therapeutic use MH - Rats MH - Rats, Inbred F344 MH - Survival Rate MH - Time Factors PMC - PMC3940280 MID - NIHMS417210 EDAT- 2008/04/26 09:00 MHDA- 2009/03/06 09:00 PMCR- 2014/03/03 CRDT- 2008/04/26 09:00 PHST- 2008/04/26 09:00 [pubmed] PHST- 2009/03/06 09:00 [medline] PHST- 2008/04/26 09:00 [entrez] PHST- 2014/03/03 00:00 [pmc-release] AID - PHP356 [pii] AID - 10.1111/j.1751-1097.2008.00356.x [doi] PST - ppublish SO - Photochem Photobiol. 2008 Sep-Oct;84(5):1257-64. doi: 10.1111/j.1751-1097.2008.00356.x. Epub 2008 Apr 23.