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著者: Chiharu Sugimori, Kanako Mochizuki, Zhirong Qi, Naomi Sugimori, Ken Ishiyama, Yukio Kondo, Hirohito Yamazaki, Akiyoshi Takami, Hirokazu Okumura, Shinji Nakao
雑誌名: Br J Haematol. 2009 Oct;147(1):102-12. doi: 10.1111/j.1365-2141.2009.07822.x. Epub 2009 Jul 28.
Abstract/Text
Peripheral blood from 489 recently diagnosed patients with aplastic anaemia (AA) and 316 with refractory anaemia (RA) of myelodysplastic syndrome was evaluated to characterize CD55(-)CD59(-) [paroxysmal nocturnal haemoglobinuria (PNH)]-type blood cells associated with bone marrow (BM) failure. PNH-type cells were detected in 57% and 20% of patients with AA and RA, respectively. The percentages of PNH-type granulocytes ranged from 0.003% to 94.2% and the distribution was log-normal with a median of 0.178%. Serial analyses of 75 patients with PNH-type cells over 5 years revealed that the percentage of PNH-type cells constantly increased in 13 (17%), persisted in 44 (59%), disappeared in the remaining 18 (24%) although even in the 'Disappearance' group, PNH-type granulocytes persisted for at least 6 months. A scattergram profile of PNH-type cells unique to each patient persisted regardless of the response to immunosuppressive therapy and only single PIGA mutations were detected in PNH-type granulocytes sorted from four patients. These findings suggest that the PNH-type cells in patients with BM failure are derived from single PIGA mutant haematopoietic stem cells even when their percentages are <1% and their fate depends on the proliferation and self-maintenance properties of the individual PIGA mutants.
PMID 19656154 Br J Haematol. 2009 Oct;147(1):102-12. doi: 10.1111/j.1365-2141.2009.07822.x. Epub 2009 Jul 28.
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