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A Window of Opportunity Study of Pre-operative Endocrine Therapy With and Without Prometrium in Postmenopausal Women With Early Stage Breast Hormone Receptor Positive (HR+) Human Epidermal Receptor 2 Negative (HER2-) Breast Cancer. — WinPro  

Early-stage Breast Cancer Clinical Trial

Official title:
A Window of Opportunity Study of Endocrine Therapy With and Without Prometrium in Postmenopausal Women With Early Stage Hormone Receptor-positive Breast Cancer.

Clinical Trial Summary

A phase II randomised, open label study of pre-operative endocrine therapy with & without prometrium in postmenopausal women with early stage breast hormone receptor positive (HR+) human epidermal receptor 2 negative (HER2-) breast cancer.

Clinical Trial Description

There is bidirectional interplay between the progesterone receptor (PR) and oestrogen receptor (ER) in human breast cancers. There is evidence for a reprogramming of ER chromatin binding sites with 470 genes differentially regulated by dual treatment with estrogen plus progestogen compared to estrogen alone in breast cancer cell lines. Functionally, there was an additive anti-cancer effect with the addition of natural progesterone to endocrine therapy in preclinical breast cancer models. This is a phase II multi-site, randomised, open-label, three-arm, study in 200 postmenopausal women with early-stage ER+, PR+, HER2-negative breast cancer. Eligible patients will be randomised (1:1:1) to receive 14 days of intervention with either letrozole 2.5mg PO daily (arm 1), letrozole 2.5mg + prometrium 300mg PO daily (arm 2) or tamoxifen 20mg + prometrium 300mg PO daily (arm 3), between diagnosis of breast cancer and definitive surgery. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT03906669
Study type Interventional
Source St Vincent's Hospital
Contact Robert Kent
Phone +61293555611
Email SVHS.CancerResearch@svha.org.au
Status Recruiting
Phase Phase 2
Start date March 20, 2018
Completion date April 2024
View Details
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