Stimulation of bacterial growth by heat-stable, norepinephrine-induced autoinducers

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Abstract

The ability of norepinephrine to increase the growth of Escherichia coli in a serum-based medium has previously been shown to be due to the production of an autoinducer of growth during early log phase. Seventeen Gram-negative and 6 Gram-positive clinical isolates were examined for a similar ability to respond to norepinephrine, and to synthesise autoinducer. The majority of Gram-negative strains both produced and responded to heat-stable norepinephrine-induced autoinducers of growth. Most of these autoinducers showed a high degree of cross-species activity, suggesting the existence of a novel family of Gram-negative bacterial signalling molecules. In contrast, although a number of Gram-positive strains were able to respond to norepinephrine, the majority failed to produce autoinducers in the presence of norepinephrine. Copyright (C) 1999 Federation of European Microbiological Societies.

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Freestone, P. P. E., Haigh, R. D., Williams, P. H., & Lyte, M. (1999). Stimulation of bacterial growth by heat-stable, norepinephrine-induced autoinducers. FEMS Microbiology Letters, 172(1), 53–60. https://doi.org/10.1016/S0378-1097(99)00007-5

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