1. Fas ligand-induced apoptosis of hepatocytes in natural killer cell leukaemia
- Author
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Ryuzo Tani, Masaaki Kosaka, Soichiro Fujiwara, Toshio Matsumoto, Shuji Ozaki, Hironobu Shibata, and Shingo Wakatsuki
- Subjects
medicine.medical_treatment ,Cell ,chemical and pharmacologic phenomena ,Hematology ,Biology ,Fas ligand ,Natural killer cell ,Proinflammatory cytokine ,medicine.anatomical_structure ,Cytokine ,Apoptosis ,Hepatocyte ,Immunology ,medicine ,Cancer research ,Interferon gamma ,medicine.drug - Abstract
Neoplastic natural killer (NK) cells overexpress Fas ligand (FasL), which may cause damage of Fas-bearing tissues. We report a patient with NK cell leukaemia who developed liver injury after pharyngitis. The NK leukaemic cells expressed functional FasL. In addition to soluble FasL, serum levels of interleukin-6 and interferon-γ were increased dramatically when liver injury was aggravated. Moreover, hepatocytes expressed Fas and apoptotic hepatocytes were detected in the portal areas. These findings are consistent with the notion that inflammatory cytokines enhance the sensitivity to FasL and trigger apoptosis of hepatocytes in NK cell malignancies.
- Published
- 1999
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