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May 07, 2026
Sensei Biotherapeutics dosed the first patient in a Phase 1b/2 trial of PIKTOR (sapanisertib + serabelisib) in HR+/HER2- advanced breast cancer. The multi-node PI3K/AKT/mTOR inhibitor previously showed a 47% overall response rate in a Phase 1b trial.
May 05, 2026
Topline phase 3 VIKTORIA-1 results showed gedatolisib combinations improved progression-free survival versus alpelisib plus fulvestrant in PIK3CA-mutant HR-positive/HER2-negative advanced breast cancer. Celcuity plans a supplemental FDA filing based on the data.
May 02, 2026
FDA has accepted the NDA for vepdegestrant (ARV-471), an oral PROTAC ER degrader from Arvinas and Pfizer, for ESR1-mutated ER+/HER2- advanced breast cancer. A PDUFA date of June 5, 2026 has been set. The submission is based on positive Phase 3 VERITAC-2 data.
Apr 02, 2026
The SONIA trial found no overall survival benefit for first-line CDK4/6 inhibitors versus second-line use in advanced HR+/HER2- breast cancer. Median survival was 47.9 vs 48.1 months, though post hoc analysis suggested benefit in premenopausal patients. First-line treatment was associated with more severe adverse events.
Apr 01, 2026
Multiple phase 3 breast cancer trials reported significant findings in early 2026, including positive results for novel therapies across different subtypes. Key data includes progression-free survival benefits for palbociclib in HR-positive, HER2-positive advanced breast cancer and investigations of antibody-drug conjugates and combination therapies. Full trial findings are expected to be presented at upcoming medical meetings.
Mar 23, 2026
Novartis will acquire Pikavation Therapeutics for up to $3 billion to gain its PI3Kα inhibitor programs, led by SNV4818 for metastatic breast cancer. The deal includes $2 billion upfront and up to $1 billion in milestones, with completion expected in first half 2026. SNV4818 is designed to selectively target mutated PI3Kα while sparing healthy cells.
Mar 20, 2026
Recent developments in breast cancer treatment include new clinical trials for advanced disease, findings on CDK4/6 inhibitor sequencing, and discovery of genetic markers explaining drug resistance in HER2-positive breast cancer.
Mar 18, 2026
Proteolysis-targeting chimeras (PROTACs) are advancing from experimental to clinical-stage cancer therapies, with first candidates entering Phase III trials. The technology degrades target proteins rather than blocking them, offering new options for previously undruggable targets.
Feb 24, 2026
MoonLake Immunotherapeutics says FDA feedback indicates sufficient data to support a U.S. BLA for hidradenitis suppurativa without additional efficacy trials, while Relay Therapeutics received FDA Breakthrough Therapy designation for zovegalisib in combination with fulvestrant for PIK3CA-mutant breast cancer.
Nov 17, 2025
The FDA has accepted Celcuity's New Drug Application for gedatolisib in HR+/HER2-/PIK3CA wild-type advanced breast cancer, granting Priority Review with a PDUFA goal date of July 17, 2026.
Feb 20, 2026
The FDA has accepted a new drug application for giredestrant plus everolimus for ESR1-mutated, ER-positive, HER2-negative advanced breast cancer, with a decision expected by December 18, 2026. The phase 3 evERA study showed a 62% reduction in disease progression or death risk in ESR1-mutated patients.
