Abstract
Treatment of some enterotoxigenic Escherichia coli strains with the antibiotic mitomycin C resulted in lysis of the bacteria. Heat-labile enterotoxin (LT) activity of culture filtrates, determined by means of the Y-1 adrenal cell assay, increased dramatically as lysis of the culture proceeded. Further studies with E. coli strains 263 and B21-4 revealed that lysis is due to mitomycin C induction of vetetative development of a temperature bacteriophage. These findings suggest that the elevated levels of LT detected after mitomycin C treatment reflect the lytic release of cell-bound LT rather than the induction by mitomycin C of de novo toxin biosynthesis. Comparable increases in LT activity also resulted from thermal induction of a phage P1Cm lysogen of strain 263 or from sonic disruption of enterotoxigenic strains.
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Selected References
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- Evans D. J., Evans D. G., Gorbach S. L. Polymyxin B-Induced Release of Low-Molecular-Weight, Heat-Labile Enterotoxin from Escherichia coli. Infect Immun. 1974 Nov;10(5):1010–1017. doi: 10.1128/iai.10.5.1010-1017.1974. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gottesman M. M., Rosner J. L. Acquisition of a determinant for chloramphenicol resistance by coliphage lambda. Proc Natl Acad Sci U S A. 1975 Dec;72(12):5041–5045. doi: 10.1073/pnas.72.12.5041. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gyles C. L., Barnum D. A. A heat-labile enterotoxin from strains of Eschericha coli enteropathogenic for pigs. J Infect Dis. 1969 Oct;120(4):419–426. doi: 10.1093/infdis/120.4.419. [DOI] [PubMed] [Google Scholar]
- Gyles C., So M., Falkow S. The enterotoxin plasmids of Escherichia coli. J Infect Dis. 1974 Jul;130(1):40–49. doi: 10.1093/infdis/130.1.40. [DOI] [PubMed] [Google Scholar]
- Isaacson R. E., Moon H. W. Induction of heat-labile enterotoxin synthesis in enterotoxigenic Escherichia coli mitomycin C. Infect Immun. 1975 Dec;12(6):1271–1275. doi: 10.1128/iai.12.6.1271-1275.1975. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Jacks T. M., Wu B. J. Biochemical properties of Escherichia coli low-molecular-weight, heat-stable enterotoxin. Infect Immun. 1974 Feb;9(2):342–347. doi: 10.1128/iai.9.2.342-347.1974. [DOI] [PMC free article] [PubMed] [Google Scholar]
- KONDO E., MITSUHASHI S. DRUG RESISTANCE OF ENTERIC BACTERIA. IV. ACTIVE TRANSDUCING BACTERIOPHAGE P1 CM PRODUCED BY THE COMBINATION OF R FACTOR WITH BACTERIOPHAGE P1. J Bacteriol. 1964 Nov;88:1266–1276. doi: 10.1128/jb.88.5.1266-1276.1964. [DOI] [PMC free article] [PubMed] [Google Scholar]
- KORN D., WEISSBACH A. Thymineless induction in Escherichia coli K12 (lambda). Biochim Biophys Acta. 1962 Nov 26;61:775–790. doi: 10.1016/0926-6550(62)90060-9. [DOI] [PubMed] [Google Scholar]
- Parker C., Richardson S. H., Romig W. R. Production of Bacteriophage-Associated Materials by Vibrio cholerae: Possible Correlation with Pathogenicity. Infect Immun. 1970 Apr;1(4):417–420. doi: 10.1128/iai.1.4.417-420.1970. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rosner J. L. Formation, induction, and curing of bacteriophage P1 lysogens. Virology. 1972 Jun;48(3):679–689. doi: 10.1016/0042-6822(72)90152-3. [DOI] [PubMed] [Google Scholar]
- Sack D. A., Sack R. B. Test for enterotoxigenic Escherichia coli using Y-1 adrenal cells in miniculture. Infect Immun. 1975 Feb;11(2):334–336. doi: 10.1128/iai.11.2.334-336.1975. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Smith H. W., Gyles C. L. The relationship between two apparently different enterotoxins produced by enteropathogenic strains of Escherichia coli of porcine origin. J Med Microbiol. 1970 Aug;3(3):387–401. doi: 10.1099/00222615-3-3-387. [DOI] [PubMed] [Google Scholar]
- Smith H. W., Linggood M. A. The transmissible nature of enterotoxin production in a human enteropathogenic strain of Escherichia coli. J Med Microbiol. 1971 Aug;4(3):301–305. doi: 10.1099/00222615-4-3-301. [DOI] [PubMed] [Google Scholar]