A Phase 2 Single Arm Study to Examine the Effects of Metformin on Cancer Metabolism in Patients With Early Stage Breast Cancer Receiving Neoadjuvant Chemotherapy
Metformin is a safe and well tolerated drug that has been widely used in the treatment of
diabetes for over 50 years. There is now growing evidence from in vitro laboratory and
animal work that metformin has anticancer properties. In addition a retrospective clinical
study in a diabetic population has demonstrated evidence of markedly increased pathological
response rates (a typically robust surrogate clinical endpoint of efficacy) to pre-surgical
chemotherapy in early breast cancer for patients that were also taking metformin as part of
their diabetes treatment.
There are several studies of metformin in cancer patients ongoing or being developed
worldwide These are predominantly in relatively unselected cancer populations and with
clinical outcomes as endpoints. However this study is the only study currently planned which
will carry out a substantial assessment of pharmacodynamic endpoints. It is important that
this study is carried out at an early stage in the development of metformin as a potential
cancer therapy in order to ensure that future large scale studies are properly informed.
Interventional
Endpoint Classification: Pharmacodynamics Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Basic Science
Measure Metformin Induced effects in phosphorylation of S6K, 4E-BP-1 and AMPK via immunohistochemical analysis
after 14-21 days of daily metforming dosing
No
Adrian Harris
Principal Investigator
The University of Oxford
United Kingdom: Research Ethics Committee
EP-TSC-647
NCT01266486
May 2011
March 2014
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