| Project/Area Number |
16590957
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Hematology
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| Research Institution | Kyoto Prefectural University of Medicine |
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Principal Investigator |
KIMURA Takafumi Kyoto Prefectural University of Medicine, Hygiene, Assistant Professor, 医学研究科, 助手 (30275193)
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| Co-Investigator(Kenkyū-buntansha) |
SONODA Yoshiaki Kansai Medical University, Hygiene, Professor, 医学部, 教授 (60206688)
IKEHARA Susumu Kansai Medical University, Pathology, Professor, 医学部, 教授 (90108986)
KAKAZU Naoki Kyoto Prefectural University of Medicine, Hygiene, Assistant Professor, 医学研究科, 助手 (20264757)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2005: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2004: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | hematopoietic stem cell / xenotransplantation / flow cytometry |
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| Research Abstract |
We transplanted human bone marrow cells into a total of 108 recipient mice with normal immunity (C57BL/6 and BDF-1), aiming at long-term human lymphohemopoietic reconstitution. Unexpectedly, most recipient mice receiving transplants (intra-bone marrow injection) of human marrow cells showed human cell repopulation for more than 18 month. The percentage of human cells in mouse bone marrow was confirmed to be 2 to 5 % by flow cytometric analysis. Moreover, no mice bearing human hemopoietic cells had obvious GvHD reaction, suggesting the usefulness of IBMI for prevention of lethal allogeneic immune responses.
We also found and reported the distinct and profound stem cell property of human CD34-negative (CD34^-) cells as compared with CD34^+ progenitors isolated from human umbilical cord blood using a NOD/SCID mice as recipients.
In addition, we reported impaired stem cell capacity, such as proliferation and differentiation potentials, of human CD34^+ cells isolated by clinical grade-immunomagnetic beads systems.
In the next step, we will try to improve the method for xenotransplants in order to get higher human cell repopulation in mice with normal immunity.
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