期刊
INTERNATIONAL JOURNAL OF HEMATOLOGY
卷 106, 期 5, 页码 638-647出版社
SPRINGER JAPAN KK
DOI: 10.1007/s12185-017-2291-4
关键词
miR-155; Activated monocyte; Phagocytosis; beta-Thalassemia/HbE
类别
资金
- Prince of Songkla University [MET560375S]
- Faculty of Medical Technology, Prince of Songkla University
Abnormal red blood cell (RBC) clearance in beta-thalassemia is triggered by activated monocytes. Recent reports indicate that miRNA (miR-) plays a role in monocyte activation. To study phagocytic function, we co-cultured monocytes of normal, non-splenectomized and splenectomized beta-thalassemia/HbE individuals with RBCs obtained from normal, non-splenectomized and splenectomized beta-thalassemia/HbE individuals. The phagocytic activity of beta-thalassemia/HbE monocytes co-cultured with beta-thalassemia/HbE RBCs was significantly higher than that of normal monocytes co-cultured with normal RBCs. Upregulation of monocyte miR-155 was observed in beta-thalassemia/HbE patients. Increased miR-155 was associated with reductions in BTB and CNC Homology1 (BACH1) target gene expression and increased phagocytic activity of beta-thalassemia/HbE monocytes. Taken together, these findings suggested that increased miR-155 expression in activated monocytes leads to enhanced phagocytic activity via BACH-1 regulation in beta-thalassemia/HbE. This provides novel insights into the phagocytic clearance of abnormal RBCs in beta-thalassemia/HbE.
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