scholarly journals Factors associated with prolonged time to treatment failure with fulvestrant 500 mg in patients with postmenopausal estrogen receptor-positive advanced/metastatic breast cancer (JBCRG-C06; Safari): A subgroup analysis

2017 ◽  
Vol 28 ◽  
pp. v100-v101
Author(s):  
H. Kawaguchi ◽  
K. Aogi ◽  
N. Masuda ◽  
T. Nakayama ◽  
Y. Ito ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Estrogen Receptor ◽  
Metastatic Breast Cancer ◽  
Treatment Failure ◽  
Subgroup Analysis ◽  
Metastatic Breast ◽  
Factors Associated ◽  
Time To Treatment Failure ◽  
Estrogen Receptor Positive ◽  
Postmenopausal Estrogen

Megestrol acetate and aminoglutethimide/hydrocortisone in sequence or in combination as second-line endocrine therapy of estrogen receptor-positive metastatic breast cancer: a Southwest Oncology Group phase III trial.

1997 ◽  
Vol 15 (7) ◽  
pp. 2494-2501 ◽  
Author(s):  
C A Russell ◽  
S J Green ◽  
J O'Sullivan ◽  
H E Hynes ◽  
G T Budd ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Estrogen Receptor ◽  
Metastatic Breast Cancer ◽  
Response Time ◽  
Treatment Failure ◽  
Metastatic Breast ◽  
Megestrol Acetate ◽  
Phase Iii ◽  
Time To Treatment Failure ◽  
Estrogen Receptor Positive

PURPOSE A phase III randomized trial was performed to determine whether combination hormonal therapy with aminoglutethimide (AG) and hydrocortisone (HC) plus megestrol acetate (MA) improved response rates, response duration, or increased survival over the sequential use of each hormone in women with estrogen receptor-positive metastatic breast cancer (MBC) who had maintained stable disease for at least 6 months or responded to tamoxifen. PATIENTS AND METHODS Two hundred eighty-eight postmenopausal women with progressive estrogen receptor-positive MBC were randomly selected to receive MA 40 mg four times daily (arm I), AG 250 mg four times daily with HC 40 mg daily in divided doses (arm II), versus the combination of MA plus AG given at the same dosages (arm III). Patients on arms I and II who progressed after an adequate trial were crossed over to the other treatment arm. RESULTS Two hundred thirty-five eligible patients were evaluated for response, time to treatment failure, and survival. Response was only reported for patients with measurable disease and was not statistically different among the three arms. There were two partial responses (PRs) on MA (6%), four complete responses (CRs) and six PRs on AG (24%), and eight PRs and three CRs on MA plus AG (23%) in 32, 42, and 48 measurable patients, respectively. Median times to treatment failure were also similar at 5, 4, and 7 months. Survival was also not statistically different among the three arms at 26, 27, and 26 months for arms I, II, and III, respectively. Toxicity was greater in the two AG arms with respect to fatigue, nausea and vomiting, and rash. CONCLUSION With the exception of toxicity, there is no response, time to treatment failure, or survival benefit for any one group when comparing MA, AG, or the combination at their stated doses in women with estrogen receptor-positive MBC who had previously responded to or stabilized with tamoxifen.

Time to treatment failure of palbociclib and letrozole as second-line therapy or beyond in hormone receptor-positive advanced breast cancer

2018 ◽  
Vol 25 (6) ◽  
pp. 1374-1380 ◽  
Author(s):  
M Alexandra Schickli ◽  
Michael J Berger ◽  
Maryam Lustberg ◽  
Marilly Palettas ◽  
Craig A Vargo
Keyword(s):  
Breast Cancer ◽  
Metastatic Breast Cancer ◽  
Treatment Failure ◽  
Endocrine Therapy ◽  
Metastatic Breast ◽  
Second Line ◽  
Time To Treatment ◽  
Cyclin Dependent Kinases ◽  
Hormone Receptor Positive ◽  
Time To Treatment Failure

Purpose The management of endocrine therapy resistance is one of the most challenging facets of advanced breast cancer treatment. Palbociclib is an inhibitor of cyclin-dependent kinases 4 and 6 approved for the treatment of hormone receptor-positive, human epidermal growth factor receptor 2-negative advanced or metastatic breast cancer in combination with fulvestrant in postmenopausal women with disease progression following endocrine therapy. However, treatment responsiveness of tumors to palbociclib after multiple lines of endocrine therapy is not clearly established. The purpose of this study was to determine the efficacy of palbociclib and letrozole in patients pretreated with one or more lines of endocrine therapy. Methods This was a single-center, retrospective cohort study of all postmenopausal hormone receptor-positive, human epidermal growth factor receptor 2-negative metastatic breast cancer patients who received palbociclib and letrozole as a second-line endocrine therapy or beyond (and no prior cyclin-dependent kinases 4 and 6 inhibitor therapy) between February 1, 2015, and July 31, 2016. The primary objective was to evaluate time to treatment failure of palbociclib in combination with letrozole as a second-line of therapy or beyond. Results Fifty-three patients meeting eligibility criteria were included in the analysis. For the primary outcome, the median time to treatment failure of palbociclib and letrozole was 6.3 months (95% CI 3.1–7.4 months). Progression-free survival of palbociclib and letrozole therapy was 6.4 months (95% CI 4.9–8.3 months). Conclusions Palbociclib and letrozole therapy is a viable, effective treatment option for metastatic breast cancer patients who were not exposed to cyclin-dependent kinases 4 and 6 inhibitors as a first-line endocrine therapy. The benefits of palbociclib and letrozole therapy were seen without excessive toxicity, and although neutropenia was common, it may be managed with dose reduction.

Abstract CT051: Phase I study of TTC-352 in patients with estrogen receptor-positive metastatic breast cancer

2019 ◽  
Author(s):  
Ruth M. ORegan ◽  
Randolph Hurley ◽  
Jasgit C. Sachdev ◽  
Jonathan Bleeker ◽  
Debra Tonetti ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Estrogen Receptor ◽  
Metastatic Breast Cancer ◽  
Phase I ◽  
Phase I Study ◽  
Metastatic Breast ◽  
Estrogen Receptor Positive
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