期刊
IMMUNOLOGY AND CELL BIOLOGY
卷 88, 期 1, 页码 87-94出版社
WILEY
DOI: 10.1038/icb.2009.69
关键词
aged B cell; bone marrow stromal cells; hematopoietic stem cells; intra-bone marrow bone marrow transplantation (IBM-BMT)
资金
- Ministry of Education, Science, Technology, Sports and Culture, Japan
Age-related reductions in the frequency and absolute number of early B lineage precursors in the bone marrow of aged mice have been reported. Reversal of B-cell lineage senescence has not been achieved. Age-related impairment of the B-cell lineage is caused by the decreasing functionality of hematopoietic and B lineage precursors, and reduced efficacy of bone marrow stromal cells that constitute the bone marrow microenvironment. To induce rejuvenation of aged B cells, we injected whole bone marrow from young donors to irradiated aged recipients through the tibia and analyzed B-cell development and immune responsiveness. In aged mice, we found significant reductions in the frequencies and absolute numbers of pro-B cells (B220(+)CD43(+)CD24(+)BP-1(-) and B220(+)CD43(+)CD24(int)BP-1(+)) and pre-B cells (B220(+)CD43(+)CD24(high)BP-1(+) and B220(+)CD43(-)IgM(-)IgD(-)). Intra-bone marrow bone marrow transplantation (IBM-BMT) of young marrow cells including both hematopoietic stem cells and bone marrow stromal cells reversed the reduction of pro-B cells and pre-B cells. In the periphery, the frequency and absolute number of marginal zone-B cell were not significantly different between young, old and IBM-BMT group. The frequency of follicular-B cells in the IBM-BMT group was significantly increased compared to old group. The frequency of B1a B cells in the peritoneal cavity was significantly decreased in the IBM-BMT group. Antibody production against T-independent antigens was not different among the young, the aged and IBM-BMT groups. Immunology and Cell Biology (2010) 88, 87-94; doi:10.1038/icb.2009.69; published online 22 September 2009
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据