@article{55d7b48c0e424251b7a8c4df6f7de020,
title = "5-aminolevulinic acid-mediated photodynamic therapy can target aggressive adult T cell leukemia/lymphoma resistant to conventional chemotherapy",
abstract = "Photodynamic therapy (PDT) is an emerging treatment for various solid cancers. We recently reported that tumor cell lines and patient specimens from adult T cell leukemia/lymphoma (ATL) are susceptible to specific cell death by visible light exposure after a short-term culture with 5-aminolevulinic acid, indicating that extracorporeal photopheresis could eradicate hematological tumor cells circulating in peripheral blood. As a bridge from basic research to clinical trial of PDT for hematological malignancies, we here examined the efficacy of ALA-PDT on various lymphoid malignancies with circulating tumor cells in peripheral blood. We also examined the effects of ALA-PDT on tumor cells before and after conventional chemotherapy. With 16 primary blood samples from 13 patients, we demonstrated that PDT efficiently killed tumor cells without influencing normal lymphocytes in aggressive diseases such as acute ATL. Importantly, PDT could eradicate acute ATL cells remaining after standard chemotherapy or anti-CCR4 antibody, suggesting that PDT could work together with other conventional therapies in a complementary manner. The responses of PDT on indolent tumor cells were various but were clearly depending on accumulation of protoporphyrin IX, which indicates the possibility of biomarker-guided application of PDT. These findings provide important information for developing novel therapeutic strategy for hematological malignancies.",
author = "Yasuhisa Sando and Matsuoka, {Ken ichi} and Yuichi Sumii and Takumi Kondo and Shuntaro Ikegawa and Hiroyuki Sugiura and Makoto Nakamura and Miki Iwamoto and Yusuke Meguri and Noboru Asada and Daisuke Ennishi and Hisakazu Nishimori and Keiko Fujii and Nobuharu Fujii and Atae Utsunomiya and Takashi Oka and Yoshinobu Maeda",
note = "Funding Information: We thank Hiromi Nakashima and Kyoko Maeda for help in obtaining the clinical samples. We thank the entire staff at the Central Research Laboratory, Okayama University Medical School. This work was supported by JSPS KAKENHI Grant Number 20K08753. Funding Information: Yasuhisa Sando, Yusuke Meguri, and Ken-ichi Matsuoka declare research funding from JIMRO Co., Ltd, Japan. Takashi Oka declares research funding from Otsuka Medical Device Co., Ltd, Japan. The sponsors had no control over the interpretation, writing, or publication of this work. The other authors have no conflict of interest. A patent was registered. Patent applicant: Okayama University; Name of inventors: T. Oka, H. Fujita and T. Yoshino; Patent number: PCT/JP2017/066480. Another patent was issued. Patent applicant: Okayama University; Name of inventors: T. Oka, H. Fujita and T. Yoshino; Patent number: 2018-153195; Specific aspect of manuscript covered in these patent application: The machine and methods based on the findings. Publisher Copyright: {\textcopyright} 2020, The Author(s).",
year = "2020",
month = dec,
day = "1",
doi = "10.1038/s41598-020-74174-x",
language = "English",
volume = "10",
journal = "Scientific reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
number = "1",
}
