Cited by 1,141Tuberculosis Research and EpidemiologyBacterial Genetics and BiotechnologyMycobacterium research and diagnosis

An in vitro model for sequential study of shiftdown of Mycobacterium tuberculosis through two stages of nonreplicating persistence

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Wayne, L G, Hayes, L G·1996·Infection and Immunity

Abstract

It was demonstrated previously that abrupt transfer of vigorously aerated cultures of Mycobacterium tuberculosis to anaerobic conditions resulted in their rapid death, but gradual depletion of available O2 permitted expression of increased tolerance to anaerobiosis. Those studies used a model based on adaptation of unagitated bacilli as they settled through a self-generated O2 gradient, but the model did not permit examination of homogeneous populations of bacilli during discrete stages in that adaptation. The present report describes a model based on culture of tubercle bacilli in deep liquid medium with very gentle stirring that keeps them in uniform dispersion while controlling the rate at which O2 is depleted. In this model, at least two stages of nonreplicating persistence were seen. The shift into first stage, designated NRP stage 1, occurred abruptly at a point when the declining dissolved O2 level approached 1% saturation. This microaerophilic stage was characterized by a slow rate of increase in turbidity without a corresponding increase in numbers of CFU or synthesis of DNA. However, a high rate of production of glycine dehydrogenase was initiated and sustained while the bacilli were in this state, and a steady ATP concentration was maintained. When the dissolved O2 content of the culture dropped below about 0.06% saturation, the bacilli shifted down abruptly to an anaerobic stage, designated NRP stage 2, in which no further increase in turbidity was seen and the co…

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Crossref · 10.1128/iai.64.6.2062-2069.1996

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  • We can learn about these states from chronic stage mouse experiments and from in vitro experiments in starvation, late stationary phase and oxygen deprivation, during which growth stasis is observed.

    “We can learn about these states from chronic stage mouse experiments48 and from in vitro experiments in starvation, late stationary phase and oxygen deprivation49, during which growth stasis is observed.”

    From The mycobacterial cell envelope — a moving target (2020) · cites this paper as [49]

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Authors
Wayne, L. G., & Hayes, L. G.
Affiliations
Veterans Health Administration (US)
Venue
Infection and Immunity
Published
1996-06
Volume
64
Issue
6
Pages
2062-2069
ISSN
  • 0019-9567 (ISSN-L)
  • 1098-5522
OpenAlex
W2123084649
Cited by
1,141
References
0
Citations by year
2026: 34 · 2025: 30 · 2024: 32 · 2023: 40 · 2022: 45 · 2021: 45 · 2020: 44 · 2019: 56 · 2018: 48 · 2017: 60 · 2016: 62 · 2015: 57 · 2014: 56 · 2013: 58 · 2012: 63
FWCI
10.74
Type
journal article
Language
en
Open access
Locations
  • Infection and Immunity (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Tuberculosis Research and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Health Sciences › Medicine › Epidemiology › Mycobacterium research and diagnosis
Keywords
Mycobacterium tuberculosis, anaerobic survival, oxygen depletion, ATP maintenance, dormancy, drug sensitivity, in vitro culture model, tuberculosis reactivation, antimicrobial mechanisms, DNA synthesis inhibition
MeSH terms
Adenosine Triphosphate, Amino Acid Oxidoreductases, DNA, Bacterial, Mycobacterium tuberculosis, Oxygen, Glycine Dehydrogenase

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