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.
The liposomal doxorubicin market is projected to grow from $1.32 billion in 2025 to $1.77 billion by 2030, while the broader breast cancer drugs market is expected to reach $54.49 billion by 2036. Growth is driven by increasing cancer incidence, adoption of targeted therapies, and advancements in drug delivery systems including liposomal formulations and antibody-drug conjugates.
CDK4/6 inhibitors have transformed HR+/HER2− breast cancer treatment, while emerging resistance mechanisms are driving development of selective CDK2 inhibitors and dual CDK2/4 strategies to address treatment failure.
