Volume 10, Issue 5, Pages (November 2004)

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Volume 10, Issue 5, Pages 882-891 (November 2004) Competitive Repopulation Assay of Two Gene-Marked Cord Blood Units in NOD/SCID/γcnull Mice  Takashi Yahata, Kiyoshi Ando, Hiroko Miyatake, Tomoko Uno, Tadayuki Sato, Mamoru Ito, Shunichi Kato, Tomomitsu Hotta  Molecular Therapy  Volume 10, Issue 5, Pages 882-891 (November 2004) DOI: 10.1016/j.ymthe.2004.07.029 Copyright © 2004 The American Society of Gene Therapy Terms and Conditions

Fig. 1 (A) Representative FACS profiles of competitive repopulation of EGFP- or EYFP-transduced CB CD34+ cells in an individual NOG mouse recipient. PB cells were collected at specific intervals and stained with anti-human CD45 mAb. The stained cells were then analyzed by flow cytometry gated for the expression of CD45. Each donor-derived human hematopoietic cell was distinguished by the expression of the marker EGFP or EYFP. (B) Kinetics of human hematopoietic cells in NOG mice transplanted with two units of CB CD34+ cells. PB cells were collected at various intervals from transplanted NOG mice (n = 11) and stained with anti-human CD45 mAb. Each dot represents one mouse recipient, and bars indicate the average of engraftment. (C) The ratio of each donor's derived CD45+ hematopoietic cells detected in the NOG mouse PB was calculated. (D) A weak linear relationship between the ratio of injected CD34+ cell number (horizontal axis) and the ratio of human hematopoietic cells engrafted in the PB at 15 weeks after transplantation (vertical axis) (r = 0.623, n = 11, P = 0.039). Molecular Therapy 2004 10, 882-891DOI: (10.1016/j.ymthe.2004.07.029) Copyright © 2004 The American Society of Gene Therapy Terms and Conditions

Fig. 2 (A) Representative FACS profiles of CD3+ T lymphocytes in competitive repopulation of EGFP- or EYFP-transduced CB CD34+ cells in an individual NOG mouse recipient. PB cells were collected at 15 weeks after transplantation. Anti-human CD3 mAb and anti-human CD45 mAb were used to detect human T lymphocytes in the PB of engrafted NOG mice. The CD3+CD45+ region was gated and marker gene expression was analyzed. (B) Kinetics of human CD3+ T lymphocytes in NOG mice transplanted with two units of CB CD34+ cells. PB cells were collected at various intervals from transplanted NOG mice (n = 11) and stained with anti-human CD3 mAb and anti-human CD45 mAb. The stained cells were then analyzed by flow cytometry gated for the expression of CD45. Each dot represents one mouse recipient, and bars indicate the average engraftment. Molecular Therapy 2004 10, 882-891DOI: (10.1016/j.ymthe.2004.07.029) Copyright © 2004 The American Society of Gene Therapy Terms and Conditions

Fig. 3 Representative FACS analysis of human T cell engraftment in the thymus of a NOG mouse recipient transplanted with two combined units of CB CD34+ cells. At 18 weeks after transplantation, thymocytes were collected and stained with anti-human CD45 mAb. Each (A, C) CD45+EGFP+ and (B, D) CD45+EYFP+ region was gated, and the expression of (A, B) CD3 and (C, D) CD4/CD8 was analyzed. The relative frequencies of each population are indicated. Molecular Therapy 2004 10, 882-891DOI: (10.1016/j.ymthe.2004.07.029) Copyright © 2004 The American Society of Gene Therapy Terms and Conditions

Fig. 4 Representative FACS profile of human multilineage engraftment in a NOG mouse recipient transplanted with two combined units of CB CD34+ cells. At 18 weeks after transplantation, BM cells were collected and analyzed for multilineage differentiation of engrafted human hematopoietic cells. To distinguish hematopoietic cells derived from each donor, each (A–E) CD45+EGFP+ and (F–J) CD45+EYFP+ region was gated, and the percentage of human CD45+ cells expressing the respective surface markers was measured. Human lineage-specific mAbs were used to detect (B, G) myeloid CD45+CD14+, (C, H) lymphoid CD45+CD19+, (E, J) CD45+CD56+, and (D, I) immature CD34+ progenitor cells in the marrow of engrafted NOG mice. The relative frequencies of each population are indicated. Molecular Therapy 2004 10, 882-891DOI: (10.1016/j.ymthe.2004.07.029) Copyright © 2004 The American Society of Gene Therapy Terms and Conditions

Fig. 5 The effects of CD34− MNCs on competitive repopulation by CD34+ cells in the NOG mouse. EGFP- or EYFP-transduced CD34+ cells with or without a respective fraction of CD34− MNCs were injected into the same NOG mouse (Table 4). At 4 to 6 weeks after transplantation, the ratio of engrafted donor-derived hematopoietic cells from each unit was measured using the expression of CD45 and the marker genes in flow cytometry. To exclude residual human T cells derived from CD34− MNCs, CD3+ cells were gated out at FACS analysis. Data shown are the ratios of CD45+EGFP+ and CD45+EYFP+ cells in the BM MNCs of the same NOG recipient (three independent experiments). Molecular Therapy 2004 10, 882-891DOI: (10.1016/j.ymthe.2004.07.029) Copyright © 2004 The American Society of Gene Therapy Terms and Conditions

Fig. 6 The effects of fractionated effector cells contained in CD34− MNCs on competitive repopulation by CD34+ cells in the NOG mouse. CD4+ or CD8+ T lymphocytes and the CD4/CD8 double-negative fraction were sorted from one CB CD34− fraction and injected into NOG mice together with CD34+ cells derived from the same CB and CD34+ cells derived from the second unit of CB (Table 5). At 3 weeks after transplantation, the ratio of engraftment was analyzed by the same method as for Fig. 5. Data shown are the ratios of CD45+EGFP+ and CD45+EYFP+ cells in the BM MNCs of the same NOG recipient (three independent experiments). (−) Transplants without CD34− MNCs; (W) transplants with whole CD34− MNC. Molecular Therapy 2004 10, 882-891DOI: (10.1016/j.ymthe.2004.07.029) Copyright © 2004 The American Society of Gene Therapy Terms and Conditions

Fig. 7 The effects of combined cell populations contained in CD34− MNCs on competitive repopulation by CD34+ cells in the NOG mouse. CD4+ and CD8+ T lymphocytes and the CD4/CD8 double-negative fraction were sorted from one CB CD34− fraction. Each sorted fraction was combined to give CD4+ and CD8+ cells, CD4+ and DN cells, or CD8+ and DN cells and injected into NOG mice together with CD34+ cells derived from the same CB and CD34+ cells derived from the second unit of CB (Table 6). At 3 weeks after transplantation, the ratio of engraftment was analyzed by the same method as for Fig. 5. (A) Representative FACS profiles of competitive repopulation of EGFP- or EYFP-transduced CB CD34+ cells in an individual NOG mouse recipient. (B) Summary of three independent experiments. Data shown are the ratios of CD45+EGFP+ and CD45+EYFP+ cells in the BM MNCs of the same NOG recipient. (−) Transplants without CD34− MNCs; (W) transplants with whole CD34− MNC. Molecular Therapy 2004 10, 882-891DOI: (10.1016/j.ymthe.2004.07.029) Copyright © 2004 The American Society of Gene Therapy Terms and Conditions