Sequential analysis of hematopoietic reconstitution achieved by transplantation of hematopoietic stem cells

S. Okada, K. Nagayoshi, H. Nakauchi, S. I. Nishikawa, Y. Miura, T. Suda

研究成果: Article査読

32 被引用数 (Scopus)

抄録

We confirmed that murine hematopoietic stem cells express the c-kit molecule but not lymphohematopoietic lineage markers. These lineage marker- negative c-kit-positive (Lin- c-kit+) cells were further divided according to the uptake of rhodamine-123 (Rh-123). Approximately 1,000 Lin- c-kit+ rhodamine-123(dull) cells, which contained 4.0 ± 1.3 and 12.5 ± 1.9 day 8 and day 12 spleen colony-forming units (CFU-S), respectively, rescued the 100% of lethally irradiated mice. One third of these cells formed colonies in the presence of interleukin-3 plus erythropoietin. The time course of the hematopoietic reconstitution of this primitive hematopoietic stem cell fraction was investigated by using Ly-5 congenic mice. Although myeloid cells and B lymphocytes were detected in the peripheral blood 2 to 3 weeks after transplantation, T lymphocytes were not detected until 4 weeks after transplantation. It is generally assumed that myeloid cells and B lymphocytes grow in the bone marrow and that T lymphocytes must pass through the thymus. For the first 2 to 3 weeks after transplantation, donor-type T lymphocytes were not dominant in the thymus, and most donor type cells were CD4/CD8 double-negative or double-positive (including CD4(low) and CD8(low)). Four weeks after transplantation, donor-type T lymphocytes were dominant and the ratio of CD4/CD8 cells had recovered to the normal pattern. However, significant numbers of T lymphocytes were detected in the peripheral blood at this stage. Sequential analysis of hematopoietic reconstitution from primitive stem cells demonstrates that myeloid and B-lymphoid lineages occurred earlier than that of the T-lymphoid lineages.

本文言語English
ページ(範囲)1720-1725
ページ数6
ジャーナルBlood
81
7
DOI
出版ステータスPublished - 1993

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology

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