Cited by 573Bacteriophages and microbial interactionsGut microbiota and healthMicrobial Community Ecology and Physiology

Dynamic modulation of the gut microbiota and metabolome by bacteriophages in a mouse model

Open access
Hsu, Bryan B., Gibson, Travis E., Yeliseyev, Vladimir, Liu, Qing, Lyon, Lorena, Bry, Lynn, Silver, Pamela A., Gerber, Georg K.·2019·Cell Host & Microbe

Published version of a preprint

Abstract

The human gut microbiome is comprised of densely colonizing microorganisms including bacteriophages, which are in dynamic interaction with each other and the mammalian host. To address how bacteriophages impact bacterial communities in the gut, we investigated the dynamic effects of phages on a model microbiome. Gnotobiotic mice were colonized with defined human gut commensal bacteria and subjected to predation by cognate lytic phages. We found that phage predation not only directly impacts susceptible bacteria but also leads to cascading effects on other bacterial species via interbacterial interactions. Metabolomic profiling revealed that shifts in the microbiome caused by phage predation have a direct consequence on the gut metabolome. Our work provides insight into the ecological importance of phages as modulators of bacterial colonization, and it additionally suggests the potential impact of gut phages on the mammalian host with implications for their therapeutic use to precisely modulate the microbiome.

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Crossref · 10.1016/j.chom.2019.05.001

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  • Phages reshape tumor-associated bacterial communities.

    “Indirectly, phages reshape tumor-associated bacterial communities, depleting protumorigenic taxa and altering microbial metabolites that regulate inflammation, genotoxic stress, and therapeutic response [20–23]”

    From Phage therapy in oncology: opportunities for cancer prevention and treatment (2026) · cites this paper as [20]

    The Introduction and Discussion describe phages reshaping a defined community of commensal gut bacteria in gnotobiotic mice. They do not establish that the community was tumor-associated, so the claim extends the finding to a setting this study did not examine. No page numbers were provided for these passages. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Phages deplete protumorigenic taxa.

    “Indirectly, phages reshape tumor-associated bacterial communities, depleting protumorigenic taxa and altering microbial metabolites that regulate inflammation, genotoxic stress, and therapeutic response [20–23]”

    From Phage therapy in oncology: opportunities for cancer prevention and treatment (2026) · cites this paper as [20]

    The Results section reports that phages knocked down targeted gut bacteria and indirectly reduced B. fragilis in a defined mouse microbiota. It does not identify those bacteria as protumorigenic or study tumor-associated communities, so the cancer-specific part of the claim is unsupported. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Phages can eliminate cancer-associated bacteria.

    “Phages can eliminate cancer-associated bacteria, remodel the tumor microenvironment, enhance antitumor immunity, and deliver targeted therapeutic payloads.”

    From Phage therapy in oncology: opportunities for cancer prevention and treatment (2026) · cites this paper as [20]

    The Results report that phages lysed susceptible gut bacteria and reduced their numbers in mice. But the Discussion explicitly says the targeted bacteria experienced “knockdown but not eradication,” and the paper does not study cancer-associated bacteria. It therefore supports bacterial targeting, not the claimed elimination in a cancer context. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Phages alter microbial metabolites that regulate inflammation, genotoxic stress, and therapeutic response.

    “Indirectly, phages reshape tumor-associated bacterial communities, depleting protumorigenic taxa and altering microbial metabolites that regulate inflammation, genotoxic stress, and therapeutic response [20–23]”

    From Phage therapy in oncology: opportunities for cancer prevention and treatment (2026) · cites this paper as [20]

    The Introduction and Results (‘Bacterial Modulation Induced by Phages Impacts the Gut Metabolome’; page unavailable) report that phages shifted gut bacterial populations and fecal metabolites in mice. The paper does not establish that these changes occurred in tumor-associated communities or depleted protumorigenic taxa, nor that the altered metabolites regulated inflammation, genotoxic stress, or therapeutic response. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Phages enable highly selective removal of cancer-associated bacteria within the gut or tumor niche, avoiding broad collateral damage to commensal communities associated with conventional antibiotics.

    “In parallel, phages enable highly selective removal of cancer-associated bacteria within the gut or tumor niche (Table 1), avoiding the broad collateral damage to commensal communities associated with conventional antibiotics [15,17,20,62,63]”

    From Phage therapy in oncology: opportunities for cancer prevention and treatment (2026) · cites this paper as [20]

    The Results (page not available) show that the phages selectively lysed their susceptible gut bacteria in a defined mouse community. The paper does not study cancer-associated bacteria or a tumor niche, nor does it compare phages with antibiotics. Its Introduction also reports changes in non-targeted commensals, so avoidance of collateral effects is overstated. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

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Authors
Hsu, B. B., Gibson, T. E., Yeliseyev, V., Liu, Q., Lyon, L., Bry, L., Silver, P. A., & Gerber, G. K.
Affiliations
  • Harvard University (US)
  • Brigham and Women's Hospital (US)
Corresponding author
  • Silver, Pamela A.
  • Gerber, Georg K.
Venue
Cell Host & Microbe
Publisher
Elsevier BV
Published
2019-06
Volume
25
Issue
6
Pages
803-814.e5
ISSN
1931-3128 (ISSN-L)
OpenAlex
W2948347995
Cited by
573
References
69
Citations by year
2026: 89 · 2025: 83 · 2024: 71 · 2023: 76 · 2022: 80 · 2021: 95 · 2020: 57 · 2019: 22
FWCI
41.13
Type
journal article
Language
en
Open access
Locations
  • Cell Host & Microbe (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Bill & Melinda Gates Foundation (OPP1150555)
  • DARPA (BRICS HR0011-15-C-0094)
  • NIH (T32 HL007627)
Topics
  • Physical Sciences › Environmental Science › Ecology › Bacteriophages and microbial interactions
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Physical Sciences › Environmental Science › Ecology › Microbial Community Ecology and Physiology
Keywords
bacteriophages, gut microbiota, phage predation, lytic phages, gnotobiotic mice, interbacterial interactions, gut metabolome, metabolite profiling, phage therapy, host-microbe interactions
MeSH terms
Gastrointestinal Microbiome, Animals, Bacteriolysis, Bacteriophages, Feces, Germ-Free Life, Mice, Metabolome, Microbial Interactions

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