M1 and M2 macrophages differentially regulate hematopoietic stem cell self-renewal and ex vivo expansion

Author:

Luo Yi12,Shao Lijian1,Chang Jianhui1,Feng Wei1,Liu Y. Lucy3,Cottler-Fox Michele H.4,Emanuel Peter D.3,Hauer-Jensen Martin1,Bernstein Irwin D.5,Liu Lingbo6,Chen Xing2,Zhou Jianfeng2,Murray Peter J.789,Zhou Daohong110

Affiliation:

1. Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR;

2. Department of Hematology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China;

3. Department of Medicine and

4. Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR;

5. Clinical Division, Department of Pediatric Oncology, Fred Hutchinson Cancer Research Center, Seattle, WA;

6. Department of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China;

7. Department of Infectious Diseases and

8. Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN;

9. Max Planck Institute of Biochemistry, Martinsried, Germany; and

10. Department of Pharmacodynamics, College of Pharmacy, University of Florida at Gainesville, Gainesville, FL

Abstract

Key Points M2-MΦs promote and M1-MΦs inhibit HSC self-renewal via differential expression of Arg1 and NOS2, respectively. Coculture of hUCB CD34+ cells with M2-MΦs resulted in a significant expansion of CD34+ cells and SCID–mice repopulating cells.

Publisher

American Society of Hematology

Subject

Hematology

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