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ID 14002
Eprint ID
14002
フルテキストURL
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タイトル(別表記)
Superoxide anion (O(2)(-)) production by neutrophils in myelodysplastic syndrome (MDS)
著者
稲垣 登稔 岡山大学医学部第二内科学教室
抄録
Myelodysplastic syndrome (MDS) are hematological disorders with the potential of progressing to acute leukemia. MDS patients occasionally die of infection despite the absence of severe pancytopenia prior to overt leukemia. Superoxide anion (O(2)(-)) production leads to intracellular bactericidal activity by neutrophils, particularly in an oxygen-dependent system. In this paper, O(2)(-) production by neutrophils in 15 MDS patients [11 patients with refractory anemia with excess of blasts (RAEB) and 4 patients with RAEB in transformation (RAEB-t)] was examined to evaluate possible causes of enhanced susceptibility to infection and to gain information concerning the pathophysiology and prognosis. The following results were obtained : (1) The O(2)(-) production by neutrophils (O(2)(-) production) in 15 MDS patients was lower than that in healthy controls (3.75±2.93 vs 6.20±1.53 nmol/min/10(6) neutrophils, p<0.05). Three of the 15 MDS patients showed little O(2)(-) production. (2) There was inverse correlation between O(2)(-) production and the percentage of leukemic cells in the marrow in acute leukemia (r=0.55, p<0.01), but not in MDS. (3) The O(2)(-) production in 5 MDS patients showing morphological anomalies in a high percentage of neutrophils significantly lower than that in 10 MDS patients showing morphological anomalies in a low percentage of neutrophils (1.04±1.37 vs 5.15±2.50 nmol/min/10(6) neutrophils, p<0.05). (4) The O(2)(-) production in 5 patients with frequent fever (≧38℃) -episodes was significantly lower than that in 10 MDS patients with infrequent fever-episodes (2.22±2.15 vs 4.49±2.83 nmol/min 10(6) neutrophils, p<0.05). (5) Comparison of the O(2)(-) production between MDS patients with and without progression to overt leukemia showed no significant difference (4.25±3.26 vs 3.28±2.76 nmol/min/10(6) neutrophils). These findings suggest that impaired O(2)(-) production by neutrophils, probably due to the faulty differentiation from abnormal hematopoietic clones, is one possible cause of enhanced susceptibility to infection in MDS, and may provide clues for clinical management of infection, but is not useful for early detection of progression to overt leukemia.
キーワード
superoxide anion
myelodysplastic syndrome (MDS)
備考
原著
発行日
1993-12-31
出版物タイトル
岡山医学会雑誌
出版物タイトル(別表記)
Journal of Okayama Medical Association
105巻
11-12号
出版者
岡山医学会
出版者(別表記)
Okayama Medical Association
開始ページ
919
終了ページ
932
ISSN
0030-1558
NCID
AN00032489
資料タイプ
学術雑誌論文
オフィシャル URL
https://www.jstage.jst.go.jp/article/joma1947/105/11-12/105_11-12_919/_article/-char/ja/
関連URL
http://www.okayama-u.ac.jp/user/oma/index.html
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言語
Japanese
著作権者
岡山医学会
論文のバージョン
publisher
査読
有り
Eprints Journal Name
joma