Trastuzumab or Lapatinib Ditosylate in Treating Women With Early Breast Cancer

Summary

RATIONALE: Monoclonal antibodies, such as trastuzumab, can block tumor growth in different ways. Some block the ability of tumor cells to grow and spread. Others find tumor cells and help kill them or carry tumor-killing substances to them. Lapatinib ditosylate may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. It is not yet known whether trastuzumab or lapatinib ditosylate is more effective in treating women with early breast cancer. Update June 2013: Since the initial development of EPHOS-B in 2007 more evidence in relation to safety and efficacy of anti-HER2 therapies are now available, and in particular, a growing body of evidence that combinations of two anti-HER2 therapies are more effective than monotherapies. Therefore this study has been amended (PART 2) to a 1:1:2 ratio to control, perioperative trastuzumab or the combination of lapatinib and trastuzumab. PURPOSE: This randomized phase III trial is studying trastuzumab to see how well it works compared with lapatinib ditosylate (and in since June 2013 - compared with a combination of lapatinib and trastuzumab) in treating women with early breast cancer.

Timeline

Start

2010-04

Primary completion

2017-08-30

Completion

2025-09

Publications

• Background Bundred N, Cameron D, Armstrong A, Brunt AM, Cramer A, Dodwell D, Evans A, Hanby A, Hartup S, Hong A., Horgan K, Khattak I, Morden J, Naik J, Narayanan S, Ooi J, Shaaban A, Smith R, Webster-Smith M, Bliss J; on behalf of the EPHOS-B investigators. Effects of perioperative lapatinib and trastuzumab alone in combination in early HER2+ breast cancer - results from the EPHOS-B trial (CRUK/08/002). Eur J Cancer Supplements. 2016; 57 (Suppl 2): S5 #6LBA.
• Background Bliss JM, Robison LE, Webster-Smith MF, Emson MA, Kilburn LS, Smith IE, Robertson J, Dowsett M, Bundred NJ, Cameron DA, Vidya R, Horgan K, Evans AA, Kokan JS, Pinhel I, A'Hern R; on behalf of the POETIC and EPHOS-B Trialists. A trial model for the future in the search for personalised medicine - the UK POETIC and EPHOS-B perioperative trials experience. Cancer Res. 2011; 71(24 Suppl): Abstract number OT2-03-04.

Drugs

Indications