“On October 16, 2018, the Food and Drug Administration approved talazoparib (TALZENNA, Pfizer Inc.), a poly (ADP-ribose) polymerase (PARP) inhibitor, for patients with deleterious or suspected deleterious germline BRCA-mutated (gBRCAm), HER2‑negative locally advanced or metastatic breast cancer. Patients must be selected for therapy based on an FDA-approved companion diagnostic for talazoparib.
“Approval was based on EMBRACA (NCT01945775), an open‑label trial randomizing 431 patients (2:1) with gBRCAm HER2‑negative locally advanced or metastatic breast cancer to receive talazoparib (1 mg) or physician’s choice of chemotherapy (capecitabine, eribulin, gemcitabine, or vinorelbine). All patients were required to have a known deleterious or suspected deleterious gBRCA mutation and must have received no more than 3 prior cytotoxic chemotherapy regimens for locally advanced or metastatic disease. Patients were required to have received treatment with an anthracycline and/or a taxane (unless contraindicated) in the neoadjuvant, adjuvant, and/or metastatic treatment setting.”
“A trial assessing the alpha-specific PI3K inhibitor alpelisib with fulvestrant met its primary endpoint of PFS among patients with hormone receptor-positive, HER-2-negative advanced breast cancer with a PIK3CA mutation, according to the agent’s manufacturer.
“The phase 3 global, double-blind SOLAR-1 study included 572 women and men with PIK3CA-mutated hormone receptor-positive, HER-2-negative advanced or metastatic breast cancer that progressed on or following prior aromatase inhibitor treatment with or without a CDK4/6 inhibitor.”
“A new drug application (NDA) for the PARP inhibitor talazoparib has been granted a priority review by the FDA for the treatment of patients with germline BRCA mutation–positive, HER2-negative locally advanced or metastatic breast cancer, according to Pfizer, the manufacturer of the agent.
“In results from the phase III EMBRACA trial, on which the application is based, talazoparib reduced risk of disease progression or death by 46% compared with chemotherapy in patients with BRCA-positive advanced breast cancer. At a median follow-up of 11.2 months, the Median progression-free survival (PFS) at the median follow-up of 11.2 months was 8.6 months (95% CI, 7.2-9.3) with talazoparib versus 5.6 months (95% CI, 4.2-6.7) with physician’s choice of therapy (HR, 0.54; 95% CI, 0.41-0.71; P <.0001). The objective response rate (ORR) was 62.6% (95% CI, 55.8-69.0) compared with 27.2% (95% CI, 19.3-36.3), respectively (odds ratio, 4.99; 95% CI, 2.9-8.8; 2-sided P value <.0001).”
“Improvements in progression-free survival (PFS) with olaparib (Lynparza) over treatment of physician’s choice (TPC) remained consistent regardless of baseline tumor burden for patients with HER2-negative breast cancer with a germline BRCA1/2 mutation (gBRCA1/2m), according to an exploratory analysis from the phase III OlympiAD trial presented at the 2018 Miami Breast Cancer Conference (MBCC).
“Although not powered to show statistical significance between the groups, in those with one metastatic site (n = 71) the median PFS with olaparib was 8.4 months compared with 4.2 months with TPC (HR, 0.62; 95% CI, 0.35-1.13). In patients with ≥2 metastatic sites (n = 231), the median PFS was 6.5 months with olaparib compared with 3.0 months for TPC, which crossed the barrier for statistical significance (HR, 0.59; 95% CI, 0.43-0.82).”
“The FDA granted fast track designation to elacestrant for the treatment of ER-positive, HER-2-negative advanced or metastatic breast cancer, according to the drug’s manufacturer.
“Elacestrant (RAD1901, Radius Health) an investigational oral selective ER downregulator/degrader is under investigation as a nonsteroidal treatment for hormone-driven or hormone-resistant breast cancer.”
“The FDA has granted a priority review to a new drug application (NDA) for abemaciclib (Verzenio) for use in combination with an aromatase inhibitor for the frontline treatment of women with hormone receptor (HR)-positive, HER2-negative advanced or metastatic breast cancer, according to Eli Lilly and Company, the manufacturer of the CDK4/6 inhibitor.
“The NDA was based on data from the phase III MONARCH 3 trial in which the addition of abemaciclib to anastrozole or letrozole reduced the risk of progression or death by 46% compared with the nonsteroidal aromatase inhibitor (NSAI) alone for previously untreated patients with HER2-negative, HR-positive advanced breast cancer.”
“The FDA approved abemaciclib for the treatment of women with hormone receptor-positive HER-2-negative advanced or metastatic breast cancer who progressed following endocrine therapy.
“The agency approved abemaciclib (Verzenio, Eli Lilly) — an investigational cyclin-dependent kinase 4/6 inhibitor —in combination with fulvestrant (Faslodex, AstraZeneca) following progression on endocrine therapy, and as a monotherapy for patients with metastatic disease previously treated with endocrine therapy and chemotherapy.”
“Adding taselisib to letrozole before surgery significantly improved outcomes for patients with early breast cancer that was both estrogen receptor positive and HER2-negative (ER+/HER2-) according to results of the LORELEI trial, presented at the ESMO 2017 Congress in Madrid.
” ‘We were able to detect a reduction in tumor size after only 16 weeks of treatment, compared to patients who received letrozole plus placebo,’ said study investigator Dr. Cristina Saura, from Vall d’Hebron University Hospital in Barcelona, Spain. ‘Any decrease in tumor measurements is something positive for patients because this means the drug has had activity against their tumor in a short period of time.’ ”
“Previously the drug was approved as second-line monotherapy for women failing anti-estrogen therapy, and as second-line combination therapy with palbociclib (Ibrance). It was first approved by the FDA in 2002.”