Cited by 313Cancer Research and TreatmentsBioactive Compounds and Antitumor AgentsCancer therapeutics and mechanisms

Local bacteria affect the efficacy of chemotherapeutic drugs

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Lehouritis, Panos, Cummins, Joanne, Stanton, Michael, Murphy, Carola T., McCarthy, Florence O., Reid, Gregor, Urbaniak, Camilla, Byrne, William L. +1 more·2015·Scientific Reports

Abstract

In this study, the potential effects of bacteria on the efficacy of frequently used chemotherapies was examined. Bacteria and cancer cell lines were examined in vitro and in vivo for changes in the efficacy of cancer cell killing mediated by chemotherapeutic agents. Of 30 drugs examined in vitro, the efficacy of 10 was found to be significantly inhibited by certain bacteria, while the same bacteria improved the efficacy of six others. HPLC and mass spectrometry analyses of sample drugs (gemcitabine, fludarabine, cladribine, CB1954) demonstrated modification of drug chemical structure. The chemoresistance or increased cytotoxicity observed in vitro with sample drugs (gemcitabine and CB1954) was replicated in in vivo murine subcutaneous tumour models. These findings suggest that bacterial presence in the body due to systemic or local infection may influence tumour responses or off-target toxicity during chemotherapy.

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  • Of a panel of 30 chemotherapeutic drugs examined in vitro against various bacteria, 10 were inhibited and six exhibited improved efficacy linked to modification of the chemical structure of the drug for gemcitabine, fludarabine, cladribine, and CB1954.

    “of a panel of 30 chemotherapeutic drugs examined in vitro against various bacteria, 10 were found to be inhibited and six exhibited improved efficacy in a way that could be linked to modification of the chemical structure of the drug in the case of gemcitabine, fludarabine, cladribine, and CB1954 (Lehouritis et al., 2015).”

    From Gut reactions: Breaking down xenobiotic–microbiome interactions (2019) · cites this paper as Lehouritis et al., 2015

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Research works printed but not linked: 1

  1. Nassar A. F. in Biotransformation and Metabolite Elucidation of Xenobiotics 163– 216 (John Wiley & Sons, Inc., 2010).

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Authors
Lehouritis, P., Cummins, J., Stanton, M., Murphy, C. T., McCarthy, F. O., Reid, G., Urbaniak, C., Byrne, W. L., & Tangney, M.
Affiliations
  • University College Cork (IE)
  • Western University (CA)
Corresponding author
Tangney, Mark
Venue
Scientific Reports
Published
2015-09-29
Volume
5
Issue
1
Pages
14554-14554
ISSN
2045-2322 (ISSN-L)
OpenAlex
W1945551477
Cited by
313
References
54
Citations by year
2026: 31 · 2025: 36 · 2024: 46 · 2023: 44 · 2022: 39 · 2021: 36 · 2020: 31 · 2019: 27 · 2018: 12 · 2017: 8 · 2016: 3
FWCI
6.38
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Scholarship@Western (Western University) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Cancer Research and Treatments
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Bioactive Compounds and Antitumor Agents
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer therapeutics and mechanisms
Keywords
bacteria, chemotherapeutic drugs, drug efficacy, chemoresistance, gemcitabine, CB1954, cladribine, fludarabine, cancer cell lines, mouse tumor model, off-target toxicity, infection and cancer
MeSH terms
Gemcitabine, Animals, Antineoplastic Agents, Aziridines, Biotransformation, Colonic Neoplasms, Deoxycytidine, Escherichia coli, Female, Injections, Subcutaneous, Listeria, Neoplasm Transplantation, Skin, Vidarabine, Injections, Intralesional, Treatment Outcome, Cladribine, Mice

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