Human thymic epithelial cells maintain long-term survival of clonogenic myeloid and erythroid progenitor cells in vitro

Katsuto Takenaka, Mine Harada, Tomoaki Fujisaki, Koji Nagafuji, Shinichi Mizuno, Toshihiro Miyamoto, Teruhisa Otsuka, Hisashi Gondo, Takashi Okamura, Yoshiyuki Niho

Research output: Contribution to journalArticle

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Abstract

Precursor cells that migrate into the thymus are still multipotent. Therefore, thymic epithelial cells (TECs) may provide microenvironments not only for T-cell development, but also for maintenance of multipotent precursor cells until they undergo T-cell commitment. In the present study, we performed long-term cultures of CD34+ bone-marrow (BM) cells on TEC lines that were derived from cortical epithelial cells of post-natal thymus, to investigate whether human TECs could maintain long-term nonlymphoid haematopoiesis. Haematopoietic cells maintained in direct contact with established TEC lines were able to generate clonogenic progeny to both myeloid and erythroid cells for periods in excess of 5 weeks. Their abilities to support colony-forming units of granulocytes-macrophages (CFU-GM) and burst-forming units of erythroids (BFU-E) were almost equal to those of BM stromal cells. We observed similar results by using cloned TEC lines derived by limiting dilution, as well as those by using parental TEC lines. Colony-forming activities were maintained even when haematopoietic progenitor cells were physically separated from TEC lines and cultured on microporous membrane. These observations indicate that haematopoiesis maintained in TEC-contact long-term cultures may depend on soluble factors produced by TEC lines. Our results suggest that thymic cortical epithelial cells have the ability to support not only the differentiation of haematopoietic cells, but also long-term survival of clonogenic myeloid/erythroid progenitor cells.

Original languageEnglish
Pages (from-to)363-370
Number of pages8
JournalBritish Journal of Haematology
Volume111
Issue number1
DOIs
Publication statusPublished - Nov 23 2000

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Myeloid Progenitor Cells
Erythroid Precursor Cells
Epithelial Cells
Cell Line
Hematopoiesis
Thymus Gland
In Vitro Techniques
T-Lymphocytes
Granulocyte-Macrophage Progenitor Cells
Erythroid Cells
Myeloid Cells
Hematopoietic Stem Cells
Mesenchymal Stromal Cells
Bone Marrow Cells
Cell Differentiation
Maintenance

All Science Journal Classification (ASJC) codes

  • Hematology

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Human thymic epithelial cells maintain long-term survival of clonogenic myeloid and erythroid progenitor cells in vitro. / Takenaka, Katsuto; Harada, Mine; Fujisaki, Tomoaki; Nagafuji, Koji; Mizuno, Shinichi; Miyamoto, Toshihiro; Otsuka, Teruhisa; Gondo, Hisashi; Okamura, Takashi; Niho, Yoshiyuki.

In: British Journal of Haematology, Vol. 111, No. 1, 23.11.2000, p. 363-370.

Research output: Contribution to journalArticle

Takenaka, K, Harada, M, Fujisaki, T, Nagafuji, K, Mizuno, S, Miyamoto, T, Otsuka, T, Gondo, H, Okamura, T & Niho, Y 2000, 'Human thymic epithelial cells maintain long-term survival of clonogenic myeloid and erythroid progenitor cells in vitro', British Journal of Haematology, vol. 111, no. 1, pp. 363-370. https://doi.org/10.1046/j.1365-2141.2000.02337.x
Takenaka, Katsuto ; Harada, Mine ; Fujisaki, Tomoaki ; Nagafuji, Koji ; Mizuno, Shinichi ; Miyamoto, Toshihiro ; Otsuka, Teruhisa ; Gondo, Hisashi ; Okamura, Takashi ; Niho, Yoshiyuki. / Human thymic epithelial cells maintain long-term survival of clonogenic myeloid and erythroid progenitor cells in vitro. In: British Journal of Haematology. 2000 ; Vol. 111, No. 1. pp. 363-370.
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