Production of an autoinducer of growth by norepinephrine culturedEscherichia coliO157:H7
- 1 June 1996
- journal article
- Published by Oxford University Press (OUP) in FEMS Microbiology Letters
- Vol. 139 (2-3) , 155-159
- https://doi.org/10.1111/j.1574-6968.1996.tb08196.x
Abstract
Escherichia coli O157:H7 were cultured in the presence of norepinephrine to generate conditioned media. The presence of a growth-inducing factor(s) in the conditioned media was examined by measurements of the ability of conditioned media to support the growth of fresh cultures of E coli O157:H7. Supplementation of fresh cultures with as little as 0.024% (v/v) norepinephrine conditioned medium resulted in increased growth as compared to controls, thereby indicating the presence of an autoinducer of growth. Analysis of the production kinetics for the autoinducer during the generation of conditioned media indicates that it differs from other more well characterized autoinducers. It is proposed that the neurohumoral environment of the host may contribute to the production of bacterial growth factors.Keywords
This publication has 15 references indexed in Scilit:
- A novel bacteristatic action of bovine and porcine serum that is reversed by norepinephrineLife Sciences, 1995
- Pheromones, social behaviour and the functions of secondary metabolism in bacteriaTrends in Ecology & Evolution, 1995
- Vero cytotoxin-producing Escherichia coli O157 in beefburgers linked to an outbreak of diarrhoea, haemorrhagic colitis and haemolytic uraemic syndrome in BritainLetters in Applied Microbiology, 1994
- [25] Detection, isolation, and characterization of siderophoresPublished by Elsevier ,1994
- Plasma catecholamines—analytical challenges and physiological limitationsBailliere's Clinical Endocrinology and Metabolism, 1993
- Alpha and Beta Adrenergic Receptor Involvement in Catecholamine-Induced Growth of Gram-Negative BacteriaBiochemical and Biophysical Research Communications, 1993
- Catecholamine induced growth of gram negative bacteriaLife Sciences, 1992
- Cloning and characterization of the Pseudomonas aeruginosa lasR gene, a transcriptional activator of elastase expressionJournal of Bacteriology, 1991
- Escherichia coli that Cause Diarrhea: Enterotoxigenic, Enteropathogenic, Enteroinvasive, Enterohemorrhagic, and EnteroadherentThe Journal of Infectious Diseases, 1987
- Local release of monoamines in the gastrointestinal tract: An in vivo study in rabbitsLife Sciences, 1986