TY - JOUR
T1 - Expression of T cell receptor Vγ5 in the adult thymus of irradiated mice after transplantation with fetal liver cells
AU - Ogimoto, Masaro
AU - Yoshikai, Yasunobu
AU - Matsuzaki, Goro
AU - Matsumoto, Koji
AU - Kishihara, Kenji
AU - Nomoto, Kikuo
PY - 1990/1/1
Y1 - 1990/1/1
N2 - T cell receptor (TcR) γ/δ displays limited diversity and its diversity is distinct in different stages of ontogeny and in different anatomical sites. The Vγ5 and Vδ1 gene products are preferentially expressed on the early fetal thymocytes and on Thy‐1+ dendritic epidermal cells, whereas the Vγ4 and Vδ5 gene products are abundantly expressed on the adult thymocytes. To elucidate whether the developmentally ordered appearance of thymocytes expressing TcR γ/δ is dependent on the source of T cell precursors or is controlled by the thymic environment where T cells develop, we compared the expression of Vγ5 on the early‐appearing thymocytes between irradiated mice after transplantation with fetal liver (FL) cells and those after transplantation with bone marrow (BM) cells. Sequential appearance of thymocyte subpopulations was observed in the thymus of radiation FL chimeras similar to that seen in radiation BM chimeras. A substantial number of thymocytes bearing Vγ5 appeared in the thymus at the early stage of radiation FL chimeras, whereas few, if any, of such Vγ5‐bearing thymocytes were detected in the thymus at any stage of radiation BM chimeras. These results suggested that the ordered expression of Vγ repertoire may depend on the origin of the T cell precursors but not on the thymic environment.
AB - T cell receptor (TcR) γ/δ displays limited diversity and its diversity is distinct in different stages of ontogeny and in different anatomical sites. The Vγ5 and Vδ1 gene products are preferentially expressed on the early fetal thymocytes and on Thy‐1+ dendritic epidermal cells, whereas the Vγ4 and Vδ5 gene products are abundantly expressed on the adult thymocytes. To elucidate whether the developmentally ordered appearance of thymocytes expressing TcR γ/δ is dependent on the source of T cell precursors or is controlled by the thymic environment where T cells develop, we compared the expression of Vγ5 on the early‐appearing thymocytes between irradiated mice after transplantation with fetal liver (FL) cells and those after transplantation with bone marrow (BM) cells. Sequential appearance of thymocyte subpopulations was observed in the thymus of radiation FL chimeras similar to that seen in radiation BM chimeras. A substantial number of thymocytes bearing Vγ5 appeared in the thymus at the early stage of radiation FL chimeras, whereas few, if any, of such Vγ5‐bearing thymocytes were detected in the thymus at any stage of radiation BM chimeras. These results suggested that the ordered expression of Vγ repertoire may depend on the origin of the T cell precursors but not on the thymic environment.
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U2 - 10.1002/eji.1830200914
DO - 10.1002/eji.1830200914
M3 - Article
C2 - 2120069
AN - SCOPUS:0025080776
VL - 20
SP - 1965
EP - 1970
JO - European Journal of Immunology
JF - European Journal of Immunology
SN - 0014-2980
IS - 9
ER -