Cited by 2,388Metabolism, Diabetes, and CancerDiabetes Treatment and ManagementCancer Risks and Factors

Metformin and reduced risk of cancer in diabetic patients

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Evans, Josie M M, Donnelly, Louise A, Emslie-Smith, Alistair M, Alessi, Dario R, Morris, Andrew D·2005·BMJ

Abstract

Voluntary surveillance systems are subject to under-reporting.Figures may underestimate true numbers.Miscategorisation of probable country of infection by presuming the country with the highest prevalence as the likely country of infection will underestimate the number of infections acquired in the United Kingdom, particularly among people originating from countries with high prevalence.New HIV diagnoses do not represent new HIV infections, as diagnosis can occur at any point between infection and death, which in the natural course of infection is typically 10-12 years.Furthermore, surveillance reports do not distinguish between partners infected in high prevalence countries while visiting and partners infected before migrating from those countries.The number of people becoming infected with HIV through heterosexual intercourse in the United Kingdom is rising steadily.As the number of heterosexuals living with HIV (diagnosed and undiagnosed) in the United Kingdom grows, the likelihood of heterosexual transmission within the country will increase, particularly among ethnic minorities.The continuing collaboration of those who contribute to the voluntary HIV/AIDS reporting system in England, Wales and Northern Ireland is gratefully acknowledged, as is the help, advice, and support of Kevin Fenton (Health Protection Agency (HPA)), Noel Gill (HPA), Phillip Mortimer (HPA), Linda Lazarus (Department of Health), and Daniel Thomas (Communicable Disease Surveillance Centre Wales), and administrative support provided by Fay Peyman (HPA) and Fateha Begum (HPA).Contributors: VLG followed up reports.SD analysed surveillance data and wrote the first draft.VLG, SD, KS, and BGE were involved in the drafting of subsequent versions.BGE is guarantor.Competing interests: None declared.Ethical approval: No patients' names are collected; instead surname Soundex codes are used and strict confidentiality of the

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Crossref · 10.1136/bmj.38415.708634.f7

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  • Long-term use of metformin in type 2 diabetes patients is linked to a decline in tumor incidence and a reduced rate of cancer-related deaths.

    “long-term use of metformin in type 2 diabetes patients has been linked to a decline in tumor incidence and a reduced rate of cancer-related deaths.192–196”

    From Drug repurposing for cancer therapy (2024) · cites this paper as [196]

    The Comment says metformin may be associated with reduced cancer risk in patients with type 2 diabetes, and its table shows lower odds of cancer-related hospital admission among those with more than 1,806 days of exposure. The study did not report cancer-related deaths; it also used first hospital admission for cancer rather than a cancer registry to establish incidence. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Retrospective clinical studies have found that metformin use is associated with improved cancer outcomes, reductions in cancer incidence, and decreased cancer mortality.

    “Furthermore, retrospective clinical studies have found that metformin use is associated with improved cancer outcomes, reductions in cancer incidence, and decreased cancer mortality (Evans et al., 2005; Franciosi et al., 2013; Gandini et al., 2014; Lee et al., 2012; Noto et al., 2012).”

    From Targeting Metabolism for Cancer Therapy (2017) · cites this paper as Evans et al., 2005

  • The retrospective study highlighted a possible link between metformin and the serine-threonine tumor suppressor LKB1 as a mechanism for the reduced risk.

    “A retrospective study published in 2005 reported that patients with diabetes who had been treated with metformin for T2DM had a lower risk of cancer and highlighted the possible link between metformin and the serine-threonine tumor suppressor, LKB1, as a mechanism for the reduced risk (113) (see Table 2).”
  • A retrospective study published in 2005 reported that patients with diabetes who had been treated with metformin for T2DM had a lower risk of cancer.

    “A retrospective study published in 2005 reported that patients with diabetes who had been treated with metformin for T2DM had a lower risk of cancer and highlighted the possible link between metformin and the serine-threonine tumor suppressor, LKB1, as a mechanism for the reduced risk (113) (see Table 2).”
  • Metformin may have additional anticancer properties independent of AMPK, LKB1, and TSC2, possibly related to inhibition of Rag GTPase-mediated activation of mTOR.

    “Metformin may have additional anticancer properties independent of AMPK, liver kinase 1 (LKB1), and TSC2. This may be related, in part, to the inhibition of Rag GTPase-mediated activation of mTOR [145].”

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Cites

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Research works printed but not linked: 4

  1. Hawley SA, Boudeau J, Reid JL, Mustard KJ, Udd L, Makela TP, et al. Complexes between the LKB1 tumor suppressor, STRAD alpha/beta and MO25 alpha/beta are upstream kinases in the AMP-activated protein kinase cascade. J Biol 2003;2(4):28.
  2. Bauman AE. Updating the evidence that physical exercise is good for health: an epidemiologic review. J Sci Med Sport 2004;7:6-19.
  3. Morris AD, Boyle DIR, MacAlpine R, Emslie-Smith A, Jung RT, Newton RW, et al. The diabetes audit and research in Tayside Scotland (DARTS) study: electronic record-linkage to create a diabetes register. BMJ 1997;315:524-8.
  4. Evans JMM, McMahon AD, McGilchrist MM, White G, Murray FE, McDe- vitt DG, et al. Topical non-steroidal anti-inflammatory drugs and hospitalisation for upper gastrointestinal bleeding and perforation. BMJ 1995;311:22-8.

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Authors
Evans, J. M. M., Donnelly, L. A., Emslie-Smith, A. M., Alessi, D. R., & Morris, A. D.
Affiliations
University of Dundee (GB)
Corresponding author
Evans, Josie M M
Venue
BMJ
Publisher
BMJ
Published
2005-04-22
Volume
330
Issue
7503
Pages
1304-1305
ISSN
  • 0007-1447 (ISSN-L)
  • 0959-8138
  • 1468-5833
OpenAlex
W2026967508
Cited by
2,388
References
2
Citations by year
2026: 53 · 2025: 58 · 2024: 87 · 2023: 111 · 2022: 109 · 2021: 148 · 2020: 157 · 2019: 165 · 2018: 138 · 2017: 169 · 2016: 144 · 2015: 153 · 2014: 177 · 2013: 153 · 2012: 144
FWCI
11.21
Type
journal article
Language
en
Open access
Locations
  • BMJ (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Discovery Research Portal (University of Dundee) (publishedVersion)
  • Stirling Online Research Repository (University of Stirling) (submittedVersion, cc-by-nc)
  • HighWire Press Open Archive (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Health Sciences › Medicine › Oncology › Cancer Risks and Factors
Keywords
metformin, cancer risk, diabetes mellitus, cancer prevention, HIV surveillance, underreporting, heterosexual transmission, HIV diagnosis, voluntary reporting system, ethnic minorities
MeSH terms
Aged, Diabetes Mellitus, Type 2, Female, Humans, Hypoglycemic Agents, Male, Metformin, Neoplasms, Pilot Projects, Risk Factors, Case-Control Studies

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