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MINI 37 - SCLC Therapy (ID 165)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Small Cell Lung Cancer
- Presentations: 1
MINI37.08 - Pazopanib as Second Line Treatment of Platinum Sensitive SCLC Patients: A Multicenter Phase II Trial of the Hellenic Oncology Research Group (ID 1683)
18:30 - 20:00 | Author(s): V. Karavasilis
Pazopanib is a small anti-angiogenic molecule inhibiting the tyrosine kinase of VEGFR‑1, VEGFR‑2, VEGFR‑3, PDGF, and c‑kit. An increased angiogenesis and VEGF expression has been reported in SCLC which is correlated with disease dissemination and poor prognosis. A multicenter phase II study of second line pazopanib in patients with SCLC was conducted.
Patients with histologically confirmed SCLC who relapsed at least 3 months after the completion of front line VP-16/CDDP chemotherapy (platinum sensitive disease) were enrolled. Eligible patients should have measurable disease and ECOG performance status (PS) 0-2. Treatment consisted of daily p.o. pazopanib 800 mg in cycles of 28 days until disease progression. The primary endpoint was progression-free rate (PFR) at 8 weeks since anti-angiogenic factors are not associated with objective tumor shrinkage.
Thirty seven out of 39 enrolled patients (2 pts are still ongoing) were evaluable for response and toxicity. The median age was 65 years (range 39-82); male=33 pts; PS 0=22 pts; PS 1=15 pts. Eleven (28.2%) patients had only local relapse. The median interval from previous treatment was 5.4 months (3.0-38.2). One (3%) CR, 10 (26%) PR and 10 (26%) SD were documented, for an overall progression free rate (PFR) of 55% (95% CI: 39.4- 71.2%). The median PFS and OS was 3.7 and 10.6 mo, respectively, while the estimated 1-year survival was 58% (median follow up= 18.9 mo). Grade 4 adverse events (AEs) included neutropenia (n=2 pts) and diarrhea (n=2 pts) whereas grade 3 AEs were fatigue (n=4pts), nausea (n=1 pt), diarrhea (n=2 pts), hand-foot syndrome (n=1 pt) and transaminasaemia (n=1 pt). Epistaxis (gr 2) was reported in 3 pts, proteinuria (gr 2) and hypertension (gr 2) in 2 pts each. There were no treatment-related deaths.
Second line treatment with pazopanib of patients with sensitive SCLC, was well-tolerated and resulted in a promising overall survival and disease control rate, including objective responses.
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