Qingfeng Chen1,#, Weijian Ye2,3, Wei Jian Tan2, Kylie Su Mei Yong1, Min Liu1, Shu Qi Tan4, Eva Loh5, Kenneth TE Chang5,6, Thiam Chye Tan4,6, Peter R Preiser2,3, Jianzhu Chen2,7,#
1 Humanized Mouse Unit, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 138673, Singapore
2 Interdisciplinary Research Group in Infectious Diseases, Singapore-Massachusetts Institute of Technology Alliance for Research and Technology, 138602, Singapore
3 School of Biological Sciences, Nanyang Technological University of Singapore, 637551, Singapore
4 Department of Obstetrics & Gynaecology, KK Women's and Children's Hospital, 229899, Singapore
5 Department of Pathology and Laboratory Medicine, KK Women's and Children's Hospital, 229899, Singapore
6 Duke-NUS Graduate Medical School, 169857, Singapore
7 The Koch Institute for Integrative Cancer Research and Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
# Corresponding Author
Published in Scientific Reports on 12 October 2015.
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Understanding of natural killer (NK) cell development in human is incomplete partly because of limited access to appropriate human tissues. We have developed a cytokine-enhanced humanized mouse model with greatly improved reconstitution and function of human NK cells. Here we report the presence of a cell population in the bone marrow of the cytokine-treated humanized mice that express both NK cell marker CD56 and myeloid markers such as CD36 and CD33. The CD56+CD33+CD36+ cells are also found in human cord blood, fetal and adult bone marrow. Although the CD56+CD33+CD36+ cells do not express the common NK cell functional receptors and exhibit little cytotoxic and cytokine-producing activities, they readily differentiate into mature NK cells by acquiring expression of NK cell receptors and losing expression of the myeloid markers. Further studies show that CD33+CD36+ myeloid NK precursors are derived from granulo-myelomonocytic progenitors. These results delineate the pathway of human NK cell differentiation from myeloid progenitors in the bone marrow and suggest the utility of humanized mice for studying human hematopoiesis.
Phenotypes of HSCs, CMPs, GMPs, myeloid NK precursors and NK cells are shown.
Figure legend: Pathway of NK cell differentiation from myeloid progenitors.
For more information on Qingfeng CHEN’s laboratory, please click here.