Summary
Antisera raised in rabbits against human thymocytes contain antibodies against peripheral lymphocytes of normal persons, patients with chronic lymphatic leukemia (CLL) and lymphoblastoid cell lines. Absorption of anti-thymocyte serum with CLL-lympphocytes and spleen preserved the antibody activity against normal peripheral lymphocytes and a lymphoblastoid cell line of T-cell type (MOLT-4), while eliminating antibodies reacting with CLL-lymphocytes and a B-cell type lymphoblastoid cell line (RPMI 1788). The incubation of human bone marrow cells with not absorbed anti-thymocyte globulin reduced considerably the number of stem cells committed to granulopoietic differentiation (CFU-C). No reduction of CFU-C, however, was observed with specifically absorbed anti-thymocyte globulin. The possible application of stem-cell-sparing, purified anti-thymocyte globulin for the suppression of graft-versus-host reactions in human bone marrow transplantation is discussed.
Zusammenfassung
In Kaninchen produzierte, gegen menschliche Thymozyten gerichtete Antiseren enthalten Antikörper gegen periphere Lymphozyten von Normalpersonen und Patienten mit chronisch-lymphatischer Leukämie (CLL) sowie gegen lymphoblastoide Zelllinien. Eine Absorption von Anti-Thymozyten-Serum mit CLL-Lymphozyten und Milz führt zu Antikörperpräparationen, die mit normalen peripheren Lymphozyten und einer lymphoblastoiden Zellinie vom T-Zell-Typ reagieren, aber keine Aktivität gegen CLL-Lymphozyten oder eine lymphoblastoide Zellinie vom B-Zell-Typ mehr zeigen.
Während die Inkubation von menschlichem Knochenmark mit nicht absorbiertem Anti-Thymozyten-Globulin die Zahl der granulozytopoetisch determinierten Stammzellen (CFU-C) erheblich reduziert, wurde nach Inkubation mit spezifisch absorbiertem Anti-Thymozyten-Globulin keine Verminderung der CFU-C gefunden. Die mögliche Verwendung von stammzellschonendem, gereinigtem Anti-Thymozyten-Globulin zur Unterdrückung der Spender-gegen-Wirt-Reaktion im Rahmen der Knochenmarktransplantation wird diskutiert.
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This study was supported by the Association EURATOM-GSF Hämatologie No. 031-64 I BIAD and the SFB 37.
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Rodt, H., Netzel, B., Brehm, G. et al. Production of antibodies specific for human thymus derived lymphocytes purified from antibodies crossreacting with colony-forming cells. Blut 29, 416–421 (1974). https://doi.org/10.1007/BF01633677
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DOI: https://doi.org/10.1007/BF01633677