The Safety and Effects of Gefitinib in Triple-negative,EGFR Positive Metastatic Breast Cancer
Breast cancer is a heterogeneous disease and can be classified into several distinctive subgroups. Triple-negative breast cancer(TNBC) is defined by lack of estrogen(ER), progesterone(PR) immunoreactivity and lack of human epidermal receptor-2(HER2) overexpression. TNBC comprises around 15% of all breast cancer and is characterized by its aggressive clinical behavior and insensitivity toward available targeted treatment strategies such as endocrine and anti-HER2 therapies.Although TNBC is sensitive to chemotherapy,early relapse with metastatic disease is common and the prognosis is poor. Development Of novel treatment strategies is,therefore,needed and the study of other potential targets in TNBC,like tyrosine kinase receptors,is a topic of interest.
Epidermal Growth Factor Receptor(EGFR) is a transmembrane receptor tyrosine kinase that encoded by cell erythroblastosis virus oncogene B1(C-erbB1) and belongs to the HER/Erythroblastosis virus oncogene B(ErbB) family. By several signal pathways,EGFR regulates cell proliferation, differentiation, apoptosis, invasion,and angiogenesis,and serves as a poor prognostic factor.EGFR is overexpressed in a variety of malignancies including TNBC.Gene expression profiling and immunohistochemical studies have indicated that 40 to 60% of TNBCs exhibit EGFR expression and gene amplification was found in 18% of this subgroup,but EGFR mutation was rare in TNBC.
By far,the role of gefitinib, an EGFR tyrosine kinase inhibitor(TKI),in the metastatic TNBC has not been identified. Most clinical trials about EGFR TKIs in the breast cancer have one or more limitations including:1) the study population had received heavily pretreatment; 2)the enrolled patients included several subgroups of breast cancer; 3)the expression of EGFR was not clear in the enrolled patients.
Here, the investigators launch a prospective clinical trial, and about 50 patients with triple-negative,EGFR positive metastatic breast cancer that have received at least second line therapy will be enrolled. these patients will be treated with gefitinib, the toxicity and effects of gefitinib will be recorded prospectively to evaluate the role of gefitinib in the metastatic TNBC.
|Study Design:||Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Phase Ⅱ Study of Gefitinib in Triple-negative,EGFR Positive Metastatic Breast Cancer|
- clinical benefit rate [ Time Frame: one month ] [ Designated as safety issue: No ]The primary end point is objective clinical benefit rate defined as objective response or stable disease for≥24wk
- progress-free survival（PFS） [ Time Frame: every 4 weeks ] [ Designated as safety issue: No ]Progress-free survival（PFS）is defined as the time from start of treatment to progression or death.
- Toxicity [ Time Frame: twice weekly ] [ Designated as safety issue: Yes ]Toxicity is assessed twice weekly and adverse effects(AEs) are classified according to the National Cancer Institute Common Toxicity Criteria(NCI-CTC).
|Study Start Date:||January 2013|
|Estimated Study Completion Date:||October 2015|
|Estimated Primary Completion Date:||April 2015 (Final data collection date for primary outcome measure)|
gefitinib tablet 250mg/day by mouth until disease progression
Other Name: IRRESA
|Contact: gengsheng email@example.com|
|Principal Investigator:||gengsheng yu||Department of oncology, Jiangmen central hospital, Jiangmen, China|