Kazia Therapeutics Limited , an oncology-focused drug development company, is pleased to announce positive final data from a phase II clinical study of paxalisib as first line therapy in patients with glioblastoma (NCT03522298). The results confirm the previously reported safety and efficacy profile with paxalisib in this high unmet need disease.
Key Points
The study recruited 30 patients with newly diagnosed glioblastoma and unmethylated MGMT promotor status, a genetic profile which confers primary resistance to temozolomide, the only existing FDA-approved drug treatment for first line treatment.
60mg once daily was identified as the maximum tolerated dose (MTD) and selected for future studies.
Median overall survival (OS) in the intent-to-treat (ITT) population (n=30) was 15.7 months (11.1 – 19.1), which compares very favourably to 12.7 months historically reported with temozolomide in this patient group.1
Median progression-free survival (PFS) in the ITT population was 8.4 months (6.6 – 10.2), representing a substantial increment over the comparable figure of 5.3 months associated with temozolomide.
In the modified ITT (mITT) population (n=27), which includes only those patients evaluable for efficacy, OS increased to 15.9 months (12.8 – 19.1).
The safety profile of paxalisib was highly consistent with previous clinical studies: hyperglycaemia, oral mucositis, and skin rash were among the most common drug-related toxicities.
Kazia expects to receive a final clinical study report in 1Q CY2022 and intends to seek publication of these data in a peer-reviewed scientific journal thereafter.
Kazia CEO, Dr James Garner, commented, “We are delighted to report positive final data from the completed phase II study of paxalisib. The data continue to demonstrate a clear efficacy signal and favourable safety profile, suggesting a meaningful advantage over temozolomide, the existing standard of care, and validating our decision last year to join the GBM AGILE pivotal study. We have gleaned invaluable insights from this trial, and we are tremendously grateful to the investigators and to the patients who participated.