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This study is designed to evaluate the clinical effects of the addition of metronomic oral vinorelbine to letrozole and anastrozole. The study will compare the efficacy and tolerability of oral metronomic vinorelbine administered in combination with letrozole or anastrozole, as treatment for hormone receptor-positive advanced or metastatic breast cancer without resistance to Aromatase Inhibitors (AI).
Full description
Letrozole and Anastrozole are AI generally used as the first line of therapy for women with HR+ breast cancer.
Furthermore, present hormonal treatments of advanced breast cancer (ABC) or Metastatic breast cancer (MBC) are sub-optimal, as only approximately one half of patients with oestrogen and/or progesterone receptor positive tumours will respond to therapy.
For this patient population, chemotherapy is a valid option, especially after failure or intolerance to hormone therapy. Both combination and sequential single-agent chemotherapy are reasonable options. Based on the available data, sequential monotherapy is recommended as the preferred choice for MBC. Preferred first-line chemotherapy single agents are anthracyclines, taxanes, capecitabine, gemcitabine and vinorelbine.
The development of oral chemotherapy formulations offer numerous benefits to patients, oncologists, oncology nurses, pharmacists and healthcare providers Metronomic therapy (MT) refers to repetitive, low doses of chemotherapy drugs. MT exerts an effect not only on tumor cells, but also on their microenvironment. In particular, the low-dose schedule compromises the repairing process of endothelial cells, leading to an anti-angiogenic effect. A systematic review of the results of phase I, II and III studies suggests that MT is a treatment option for breast cancer patients, has a low toxicity profile, efficacy in most patients and has potentially significant cost-effective advantages for public health.
Enrollment
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Inclusion criteria
Patient has signed informed consent before any trial related activities and according to local guidelines
Women with advanced (inoperable loco regionally recurrent or metastatic) breast cancer
No prior systemic anti-cancer therapy for advanced disease.
Patient is postmenopausal. Postmenopausal status is defined either by:
Patient has a histological and/or cytological confirmed diagnosis of estrogen-receptor positive and/or progesterone receptor positive breast cancer by local laboratory ( determined by >10% positive stained cells for estrogen receptor by IHC on the primary tumor or on metastatic site whichever the value of progesterone receptor).
Patient has HER2-negative breast cancer defined as a negative in situ hybridization test or an IHC status of 0, 1+ or 2+. If IHC is 2+, a negative in situ hybridization (FISH, CISH, or SISH) test is required by local laboratory testing.
Patient must have either:
Patient has an Eastern Cooperative Oncology Group (ECOG) performance status <2
Patient has adequate bone marrow and organ function as defined by the following laboratory values:
Life expectancy > 16 weeks
Exclusion criteria
Note:
• Patients who received (neo) adjuvant therapy for breast cancer are eligible. Prior therapy with letrozole or anastrozole in the (neo) adjuvant setting is permitted if the disease free interval is greater than 24 months from the completion of treatment.
History of angina pectoris, symptomatic pericarditis, or myocardial infarction within 6 months prior to study entry History of documented congestive heart failure (New York Heart Association functional classification III-IV) Documented cardiomyopathy
Primary purpose
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98 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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