|
2
|
SASAKI KAZUHITO, TSUNO NELSONH, SUNAMI EIJI, KAWAI KAZUSHIGE, SHUNO YASUTAKA, HONGO KUMIKO, HIYOSHI MASAYA, KANEKO MANABU, MURONO KOJI, TADA NORIKO, NIREI TAKAKO, KITAYAMA JOJI, TAKAHASHI KOKI, NAGAWA HIROKAZU. Radiosensitization of human breast cancer cells to ultraviolet light by 5-fluorouracil. Oncol Lett 2011; 2:471-476. [PMID: 22866105 PMCID: PMC3410487 DOI: 10.3892/ol.2011.261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 02/22/2011] [Indexed: 11/05/2022] Open
Abstract
Ultraviolet light B (UVB) phototherapy is widely used to treat dermatological diseases and therefore may be a potential optional strategy in the treatment of a skin lesion infiltrated by a malignant tumor. Currently, little is known regarding the effect of UVB phototherapy on human breast cancer cells. The present study aimed to investigate the effect of UVB phototherapy, as well as the potential effect of 5-fluorouracil (5-FU), the first-line anticancer drug for breast cancer, on radiosensitizing MCF-7 human breast cancer cells, in an attempt to develop new therapeutic strategies for the treatment of locoregional recurrence of breast cancer. MCF-7 cells were incubated in the presence of 5-FU for 48 h, and UVB irradiation at 750 mJ/cm(2) was administered in the midterm of 5-FU treatment. The viability of MCF-7 cells was analyzed by the trypan blue staining method. Apoptosis was quantified by flow cytometry and Hoechst 33258 staining. The cell cycle was evaluated by flow cytometry after the staining of cells with propidium iodide. The combination treatment of 5-FU and UVB resulted in a strong potentiation of the inhibitory effect of MCF-7 cell growth, dependent on the intra-S phase cell cycle arrest and induction of apoptosis, when compared to treatment with 5-FU or UVB alone. In conclusion, 5-FU sensitized human breast cancer cells to UVB phototherapy, and this combination therapy is an effective and promising strategy for the treatment of breast cancer, particularly for locoregional recurrence.
Collapse
Affiliation(s)
- KAZUHITO SASAKI
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - NELSON H. TSUNO
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
- Department of Transfusion Medicine, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - EIJI SUNAMI
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - KAZUSHIGE KAWAI
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - YASUTAKA SHUNO
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - KUMIKO HONGO
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - MASAYA HIYOSHI
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - MANABU KANEKO
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - KOJI MURONO
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - NORIKO TADA
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - TAKAKO NIREI
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - JOJI KITAYAMA
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - KOKI TAKAHASHI
- Department of Transfusion Medicine, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - HIROKAZU NAGAWA
- Department of Surgical Oncology, Faculty of Medical Sciences, The University of Tokyo, Tokyo, Japan
| |
Collapse
|
|
3
|
Menter A, Korman NJ, Elmets CA, Feldman SR, Gelfand JM, Gordon KB, Gottlieb A, Koo JY, Lebwohl M, Lim HW, Van Voorhees AS, Beutner KR, Bhushan R. Guidelines of care for the management of psoriasis and psoriatic arthritis. J Am Acad Dermatol 2010; 62:114-135. [DOI: 10.1016/j.jaad.2009.08.026] [Citation(s) in RCA: 245] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 08/07/2009] [Accepted: 08/12/2009] [Indexed: 11/26/2022]
|