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Treatment with insulin (analogues) and breast cancer risk in diabetics

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Authors:
  • Bronsveld, Heleen K ;
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    unknown
  • Ter Braak, Bas ;
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    unknown
  • Karlstad, Øystein ;
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    unknown
  • Vestergaard, Peter ;
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    Aalborg University Hospital, The Faculty of Medicine, Aalborg University
  • Starup-Linde, Jakob ;
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    Aalborg University Hospital, The Faculty of Medicine, Aalborg University
  • Bazelier, Marloes T ;
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    unknown
  • De Bruin, Marie L ;
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    unknown
  • de Boer, Anthonius ;
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    unknown
  • Siezen, Christine L E ;
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    unknown
  • van de Water, Bob ;
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    unknown
  • van der Laan, Jan Willem ;
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    unknown
  • Schmidt, Marjanka K
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    unknown
Subtitle:
a systematic review and meta-analysis of in vitro, animal and human evidence
DOI:
10.1186/s13058-015-0611-2
Abstract:
INTRODUCTION: Several studies have suggested that anti-diabetic insulin analogue treatment might increase cancer risk. The aim of this study was to review the postulated association between insulin and insulin analogue treatment and breast cancer development, and plausible mechanisms. METHOD: A systematic literature search was performed on breast cell-line, animal and human studies using the key words 'insulin analogue' and 'breast neoplasia' in MEDLINE at PubMed, EMBASE, and ISI Web of Science databases. A quantitative and qualitative review was performed on the epidemiological data; due to a limited number of reported estimates, a meta-analysis was performed for glargine only. A comprehensive overview was composed for in vitro and animal studies. Protein and gene expression was analysed for the cell lines most frequently used in the included in vitro studies. RESULTS: In total 16 in vitro, 5 animal, 2 in vivo human and 29 epidemiological papers were included. Insulin AspB10 showed mitogenic properties in vitro and in animal studies. Glargine was the only clinically available insulin analogue for which an increased proliferative potential was found in breast cancer cell lines. However, the pooled analysis of 13 epidemiological studies did not show evidence for an association between insulin glargine treatment and an increased breast cancer risk (HR 1.04; 95 % CI 0.91-1.17; p=0.49) versus no glargine in patients with diabetes mellitus. It has to be taken into account that the number of animal studies was limited, and epidemiological studies were underpowered and suffered from methodological limitations. CONCLUSION: There is no compelling evidence that any clinically available insulin analogue (Aspart, Determir, Glargine, Glulisine or Lispro), nor human insulin increases breast cancer risk. Overall, the data suggests that insulin treatment is not involved in breast tumour initiation, but might induce breast tumour progression by up regulating mitogenic signalling pathways.
Type:
Journal article
Language:
English
Published in:
Breast Cancer Research (online Edition), 2015, Vol 17, Issue 1
Keywords:
Animals; Breast Neoplasms; Cell Line, Tumor; Diabetes Mellitus, Type 2; Female; Humans; Hypoglycemic Agents; Insulin Glargine; MCF-7 Cells; Risk; Journal Article; Meta-Analysis; Research Support, Non-U.S. Gov't
Main Research Area:
Medical science
Publication Status:
Published
Review type:
Peer Review
Submission year:
2015
Scientific Level:
Scientific
ID:
2280282672

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