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Effects of insulin and analogues on carcinogen-induced mammary tumours in high-fat-fed rats.


ABSTRACT: It is not fully clarified whether insulin glargine, an analogue with a high affinity for insulin-like growth factor-1 receptor (IGF-1R), increases the risk for cancers that abundantly express IGF-1R such as breast cancer or some types of breast cancer. To gain insight into this issue, female Sprague-Dawley rats fed a high-fat diet were given the carcinogen N-methyl-N-nitrosourea and randomly assigned to vehicle (control), NPH (unmodified human insulin), glargine or detemir (n?=?30 per treatment). Insulins were given subcutaneously (15?U/kg/day) 5 days a week. Mammary tumours were counted twice weekly, and after 6 weeks of treatment, extracted for analysis. None of the insulin-treated groups had increased mammary tumour incidence at any time compared with control. At 6 weeks, tumour multiplicity was increased with NPH or glargine (P?

SUBMITTER: Mori Y 

PROVIDER: S-EPMC5958747 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Effects of insulin and analogues on carcinogen-induced mammary tumours in high-fat-fed rats.

Mori Yusaku Y   Ko Eunhyoung E   Furrer Rudolf R   Qu Linda C LC   Wiber Stuart C SC   Fantus I George IG   Thevis Mario M   Medline Alan A   Giacca Adria A  

Endocrine connections 20180424 5


It is not fully clarified whether insulin glargine, an analogue with a high affinity for insulin-like growth factor-1 receptor (IGF-1R), increases the risk for cancers that abundantly express IGF-1R such as breast cancer or some types of breast cancer. To gain insight into this issue, female Sprague-Dawley rats fed a high-fat diet were given the carcinogen N-methyl-N-nitrosourea and randomly assigned to vehicle (control), NPH (unmodified human insulin), glargine or detemir (<i>n</i> = 30 per tre  ...[more]

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