Cited by 48Evolution and Genetic DynamicsBacteriophages and microbial interactionsMathematical and Theoretical Epidemiology and Ecology Models

Lethal mutagenesis of bacteria.

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Bull, James J, Wilke, Claus O·2008·Genetics

Abstract

Lethal mutagenesis, the killing of a microbial pathogen with a chemical mutagen, is a potential broad-spectrum antiviral treatment. It operates by raising the genomic mutation rate to the point that the deleterious load causes the population to decline. Its use has been limited to RNA viruses because of their high intrinsic mutation rates. Microbes with DNA genomes, which include many viruses and bacteria, have not been considered for this type of treatment because their low intrinsic mutation rates seem difficult to elevate enough to cause extinction. Surprisingly, models of lethal mutagenesis indicate that bacteria may be candidates for lethal mutagenesis. In contrast to viruses, bacteria reproduce by binary fission, and this property ensures their extinction if subjected to a mutation rate >0.69 deleterious mutations per generation. The extinction threshold is further lowered when bacteria die from environmental causes, such as washout or host clearance. In practice, mutagenesis can require many generations before extinction is achieved, allowing the bacterial population to grow to large absolute numbers before the load of deleterious mutations causes the decline. Therefore, if effective treatment requires rapid population decline, mutation rates ≫0.69 may be necessary to achieve treatment success. Implications for the treatment of bacteria with mutagens, for the evolution of mutator strains in bacterial populations, and also for the evolution of mutation rate in cancer are discussed.

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  1. Maynard Smith, J., 1978 The Evolution of Sex. Cambridge University Press, Cambridge, UK.

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Authors
Bull, J. J., & Wilke, C. O.
Affiliations
The University of Texas at Austin (US)
Corresponding author
Wilke, Claus O
Venue
Genetics
Published
2008-10-01
Volume
180
Issue
2
Pages
1061-1070
ISSN
  • 0016-6731 (ISSN-L)
  • 1943-2631
OpenAlex
W2116887235
Cited by
48
References
57
Citations by year
2025: 1 · 2024: 4 · 2023: 1 · 2021: 3 · 2020: 2 · 2019: 5 · 2018: 3 · 2017: 7 · 2015: 1 · 2013: 2 · 2012: 4
FWCI
2.86
Type
journal article
Language
en
Open access
Locations
  • Genetics (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (R01GM057756, R01 GM57756)
  • National Institute of Allergy and Infectious Diseases (R01AI065960)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
  • Physical Sciences › Environmental Science › Ecology › Bacteriophages and microbial interactions
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Mathematical and Theoretical Epidemiology and Ecology Models
Keywords
lethal mutagenesis, bacterial mutagenesis, chemical mutagens, deleterious mutation load, binary fission, mutator strains, mutation rate evolution
MeSH terms
Bacteria, DNA Repair, Mutagens, Mutation, Mutagenesis, Evolution, Molecular, Drug Resistance, Bacterial

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