title: The immunological effect of 8-methoxypsoralen and UVA treatment on murine T-cell leukemia.
abstract: 8-Methoxypsoralen (8-MOP) plus long-wavelength UV radiation (UVA, 320-400 nm) have been used to treat various diseases such as cutaneous T-cell lymphoma, systemic scleroderma, rheumatoid arthritis and rejection of heart transplants. However, the immunological mechanism of this treatment remains unknown. In this report, we investigated the effect of 8-MOP/UVA on the modulation of the immunogenicity of a T-cell leukemia cell line (RL male 1 cells). The results demonstrated that the stimulator function of the in vitro 8-MOP/UVA-treated RL male 1 cells was enhanced in both RL male 1-specific allogeneic and syngeneic immune responses. Furthermore, the enhancement of the immunogenicity of the 8-MOP/UVA-treated RL male 1 cells was found to be strongly associated with the increase of intercellular adhesion molecule-1 expression on these 8-MOP/UVA-treated tumor cells. Therefore, our findings suggested that the alteration of the expression of the immune-related cell surface molecules might be an important effect of 8-MOP/UVA treatment on the elevation of the immunogenicity of the 8-MOP/UVA-treated tumor cells.
authors.affiliation: Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, R.O.C.
authors.forename: T Y
authors.initials: TY
authors.lastname: Cheng
authors.forename: F W
authors.initials: FW
authors.lastname: Shen
authors.forename: R H
authors.initials: RH
authors.lastname: Lin
mesh_terms: D000818:Animals; D005260:Female; D018799:Intercellular Adhesion Molecule-1 / Q000235:genetics; D015458:Leukemia, T-Cell / Q000188:drug therapy* / Q000276:immunology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D011701:PUVA Therapy; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D012334:RNA, Neoplasm / Q000235:genetics / Q000378:metabolism
chemical_list: D012333:RNA, Messenger; D012334:RNA, Neoplasm; D018799:Intercellular Adhesion Molecule-1