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JICC01 - Joint IASLC-CAALC-CSCO Session: The Truth and Myth of Oral Anti-VEGFR Inhibitors for Advance NSCLC (ID 276)
- Event: WCLC 2020
- Type: Workshop
- Track: N.A.
- Presentations: 1
- Coordinates: 1/28/2021, 07:00 - 09:00, Scientific Program Auditorium
JICC01.14 - Efficacy and Safety of Pralsetinib in Chinese Patients with Advanced RET Fusion+ Non-Small Cell Lung Cancer after Platinum-Based Chemotherapy (ID 4273)
07:00 - 09:00 | Author(s): Yuping Sun
RET fusions have been reported as oncogenic drivers in 1% to 2% of non-small cell lung cancer (NSCLC) patients. Pralsetinib is a highly potent and selective RET kinase inhibitor targeting oncogenic RET alterations. A global phase I/II ARROW study (NCT03037385) has demonstrated broad and durable antitumor activity of pralsetinib in a variety of advanced RET-altered solid tumors. Here we present the efficacy and safety results from the phase II NSCLC extension group that enrolled patients from China sites. Methods
RET fusion+ Chinese NSCLC patients previously treated with platinum-based chemotherapy were enrolled and dosed with pralsetinib 400 mg QD. The primary objectives were to assess the objective response rate (ORR) by blinded independent central review (BICR) per RECIST v1.1 and safety profile in Chinese patients. Results
From Aug to Dec 2019, a total of 37 patients were enrolled; most (94.6%) of the patients had ECOG PS of 1 and about half (48.6%) had received ≥3 prior systemic regimens. As of the data cut-off (22 May 2020), 28 patients remained on study treatment and 9 discontinued from pralsetinib (4 due to disease progression and 3 due to adverse events). The median treatment duration was 6.1 (range: 0.9-9.4) months. In 32 evaluable patients who had measurable disease at baseline per BICR, the ORR was 56.3% (95% CI: 37.7, 73.6) (1 complete response [CR] and 17 partial responses [PR]); in addition, 2 patients achieved PR pending confirmation. Clinical benefit rate (defined as the rate of confirmed CR or PR, or stable disease lasting ≥ 16 weeks from the first dose) was 81.3% (95% CI: 63.6, 92.8). Disease control rate was 96.9% (95% CI: 83.8, 99.9), and tumor regression was observed in all 13 patients with stable disease. The median time to response was 1.9 (range: 1.7-5.5) months. Median duration of response (DOR) was not reached; 6-month DOR rate was 83.1% (95% CI: 61.5, 100). All 37 patients experienced at least one treatment emergent adverse event (TEAE). The most frequently reported TEAEs were aspartate aminotransferase increased (83.8%), neutrophil count decreased (70.3%), anaemia (67.6%), white blood cell count decreased (56.8%), and hypertension (51.4%). Grade ≥ 3 TEAEs occurred in 25 (67.6%) patients, with the most common being neutrophil count decreased (24.3%), anaemia (24.3%), hypertension (16.2%), hypophosphataemia (13.5%), platelet count decreased (10.8%) and hypokalaemia (10.8%). There were no pralsetinib related AEs leading to death.Conclusion
This is the first pivotal study to show that pralsetinib has deep and durable antitumor activity, and is well-tolerated in a cohort of Chinese patients with RET fusion+ NSCLC previously treated with platinum-based chemotherapy. The data are consistent with previously reported data from the global population in the ARROW trial. Overall, pralsetinib demonstrated a favorable benefit-risk profile, potentially offering a transformative medicine to Chinese RET-fusion driven advanced NSCLC patients.
P79 - Immunotherapy (Phase II/III Trials) - Immunotherapy Plus Chemotherapy (ID 256)
- Event: WCLC 2020
- Type: Posters
- Track: Immunotherapy (Phase II/III Trials)
- Presentations: 1
- Coordinates: 1/28/2021, 00:00 - 00:00, ePoster Hall
P79.08 - Sintilimab ± IBI305 Plus Chemotherapy for Patients With EGFR-Mutant Non-Squamous NSCLC Failed to EGFR-TKI Treatment (ID 1304)
00:00 - 00:00 | Author(s): Yuping Sun
The standard treatment for advanced non-squamous non-small cell lung cancer (nsqNSCLC) patients with EGFR-mutation is osimertinib or other recommended tyrosine kinase inhibitors (TKIs). For those who failed to TKI treatment, the choice of systemic treatment is limited, including platinum-based chemotherapy, and new therapy regimens are needed to improve the efficacy. T-cell mediated cancer cell killing of anti-PD-1 antibody may be enhanced through reversal of vascular endothelial growth factor (VEGF)-mediated immunosuppression. Sintilimab is a humanized, monoclonal antibody that blocks the interaction between PD-1 and its ligands. IBI305 is a biosimilar candidate for bevacizumab which is a monoclonal antibody against VEGF. ORIENT-31 study is a randomized, double-blind, multi-center, phase 3 study to compare the efficacy and safety of sintilimab with or without IBI305 plus pemetrexed and cisplatin versus placebo plus pemetrexed and cisplatin. (NCT03802240).Methods
Patients, who have failed to epidermal growth factor receptor (EGFR)-TKI treatment, with histologically/cytologically confirmed Stage IIIB-IV nsqNSCLC with EGFR mutations will be enrolled in this two-stage study. The total planned sample size is 600, with 480 patients in the common enrollment stage and 120 patients in the extension enrollment stage. In the common enrollment stage, 480 patients will be enrolled and randomized (1:1:1) into Group A (sintilimab + IBI305 + pemetrexed + cisplatin), Group B (sintilimab + placebo 2 + pemetrexed + cisplatin) and Group C (placebo 1 + placebo 2 + pemetrexed + cisplatin). In the extension enrollment stage, 120 patients will be enrolled and randomized (1:1) into Group A and Group B. Stratification factors include gender (male or female) and brain metastasis (with or without). Sintilimab 200 mg with or without IBI305 15 mg/kg will be administrated every 3 weeks (Q3W) until disease progression, unacceptable toxicity or voluntary patient withdrawal for up to 24 months. The pemetrexed 500 mg/m2 and cisplatin 75 mg/m2 will be administrated Q3W for up to 4 cycles. The primary efficacy endpoint is progression-free survival per RECIST V 1.1 by Independent Radiographic Review Committee. The secondary efficacy endpoints include overall survival, objective response rate, disease control rate, time to response and duration of response per RECIST V1.1. By March 9, 2020, 112 patients have been enrolled in this study.
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