Summary
Two thin film culture systems, the controlled environment steady state system (SS) and the rocker tube configuration of that system (RT), were used to identify some of the conditions that appear to maintain morphologic and functional characteristics of cells of human bone marrow explants in vitro. The systems configuration assured continual gassing, control and easy monitoring of the cultures. Cytocentrifuge preparations of media of specimens cultured in RT disclosed, though in decreasing numbers, various hematopoietic cells for periods exceeding one month. Hematopoietic cells shed from specimens cultured in the SS system were retained in the culture tubes; cells of the myelocytic series predominated for the first 2 weeks while an increasing number of monocytes and macrophages appeared in the media of older cultures. Histologic examination of cultured explants disclosed preservation of the marrow architecture and the persistence of hematopoietic cells. Specimens cultured in RT tubes tended to be less cellular than similar cultures placed in dialysis bags or as cultured in the SS system. Immunoglobulins (Ig) were released into the culture media at a constant rate throughout the period of culture. Specimens that were cultured at a controlled pH of 7.4 released 2 to more than 4 times as much Ig as similar specimens maintained at a pH level of 7.1. There were no definitive differences in Ig levels in the cultures maintained at comparable pH levels and overlaid with various CO2 concentrations, i.e. 2%, 5%, 10%; similarly, no differences in Ig levels were found in specimens cultured in media containing fetal bovine sera as opposed to horse sera.
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Supported by U.S.P.H.S. Grant CA-5834 from the National Cancer Institute.
Department of Medicine A.
Department of Cell Physiology
Department of Immunology and Immunochemistry.
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Gailani, S., McLimans, W.F., Nussbaum, A. et al. Studies on normal human bone marrow cultures in controlled environment thin-film culture systems. In Vitro Cell.Dev.Biol.-Plant 12, 363–372 (1976). https://doi.org/10.1007/BF02796314
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DOI: https://doi.org/10.1007/BF02796314