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Intracellular levels of adenosine triphosphate in hamster trachea organ cultures exposed toMycoplasma pneumoniae cells or membranes

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Summary

The amount of adenosine triphosphate (ATP) in hamster trachea organ cultures was determined with a technique based on light emission from a luciferin/luciferase/ATP reaction. The amount of ATP, expressed as ng per mg dry weight, was consistent in tracheal explants prepared from various animals and changed negligibly when explants were cultivated in vitro for several days. The amount of ATP was related directly to cellular activity and integrity in the epithelium since inactivation by heat or freeze-thaw rapidly depleted measurable ATP, and ciliary activity and ATP content were related directly. When tracheal explants were infected with 105 to 107 CFU of virulentMycoplasma pneumoniae cells, both ciliary activity and ATP content in the tissue dropped dramatically after approximately 5 to 8 days (up to 85% and 60% decreases, respectively). Exposure of explants to 50 to 200 μg per ml of purifiedM. pneumoniae membranes also caused significant decreases in ciliary activity and ATP. When explants were infected with attenuated or nonvirulent mycoplasmas, ciliary activity was only slightly decreased, while ATP values often rose slightly. The technology associated with the determination of ATP levels in tracheal explants should prove useful as a new, objective, analytical approach to cell viability in organ cultures.

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This investigation was supported in part by the National Institutes of Health (PHS Grant AI 12559), by a Biomedical Sciences Support Grant made to the University of Illinois School of Life Sciences, and by the University Research Board.

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Gabridge, M.G., Polisky, R.B. Intracellular levels of adenosine triphosphate in hamster trachea organ cultures exposed toMycoplasma pneumoniae cells or membranes. In Vitro 13, 510–516 (1977). https://doi.org/10.1007/BF02615144

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