IL-33转基因小鼠骨髓造血干/祖细胞向髓系细胞分化的能力增强  

IL-33 transgenic mice increase the myeloid differentiation in hematopoietic stem cells

作　　者：白琳[1] 石桂英[1] 高珊[1] 杨亚军[1] 高昆[1] 张连峰[1] 

机构地区：[1]中国医学科学院北京协和医学院实验动物研究所,卫生部人类疾病比较医学重点实验室,北京100021

出　　处：《中国比较医学杂志》2014年第3期39-44,共6页Chinese Journal of Comparative Medicine

基　　金：国家自然科学基金青年科学基金项目(81200256);高等学校博士学科点专项科研基金新教师类资助课题(20121106120034)

摘　　要：目的利用IL-33转基因小鼠研究IL-33对造血干/祖细胞的增殖和分化影响。方法利用流式细胞仪分析IL-33转基因小鼠及同窝野生对照小鼠的外周血、脾脏、骨髓细胞的免疫表型及造血干细胞分化不同阶段细胞的数量变化;利用体外成克隆实验和细胞周期分析研究IL-33对于造血干细胞增殖能力的影响。结果与野生型小鼠相比,IL-33转基因小鼠B细胞和T细胞在外周血中都明显降低,粒细胞在外周血和骨髓中都有明显增加;IL-33转基因小鼠的骨髓造血干细胞和多能祖细胞数量减少,共同淋系祖细胞数量减少,共同髓系祖细胞和粒单系祖细胞数量增加;IL-33转基因小鼠的造血干细胞处于S-G2-M的细胞增多;体外单克隆实验发现IL-33转基因小鼠造血干细胞形成的集落数增加。结论 IL-33转基因小鼠造血干细胞增殖能力增强,更易向髓系细胞分化。Objective To study the influence of IL-33 on the Hematopoietic stem cells and progenitor cells . Methods Cells from the peripheral blood , spleen, thymus and bone marrow were stained with indicated antibodies and analyzed by flow cytometry . The LT-HSCs were sorted and culture using in vitro clonogenic assay . Results The percentage of B cells and T cells was decreased and the percentage of M cells was increased in the peripheral blood from IL -33 transgenic mice .Compared with the wildtype mice , the number of HSCs , MPPs and CLP was decreased;meanwhile the number of CMP and GMP was increased in the bone marrow from IL-33 transgenic mice .An in vitro clonogenic assay showed that LT-HSCs increased the ability to self-renew from IL-33 transgenic mice .And the percentage of S-G2-M stage hematopoietic stem cell was increased from IL-33 transgenic mice .Conclusion IL-33 increase the myeloid differentiation＆amp;nbsp;in hematopoietic stem cells .

关 键 词：IL-33 流式细胞术 骨髓造血干细胞 髓系细胞 

分 类 号：R-332[医药卫生]