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P1.01 - Advanced NSCLC (Not CME Accredited Session) (ID 933)
- Event: WCLC 2018
- Type: Poster Viewing in the Exhibit Hall
- Presentations: 1
- Coordinates: 9/24/2018, 16:45 - 18:00, Exhibit Hall
P1.01-76 - A Phase II Trial of Albumin-Bound Paclitaxel and Gemcitabine in Patients with Newly Diagnosed Stage IV Squamous Cell Lung Cancers (ID 13324)
16:45 - 18:00 | Author(s): Afsheen Iqbal
Therapeutic options for SQCLC patients are limited. The efficacy of platinum-based doublets, long the standard first-line treatments, has plateaued, with ORR=30%. Anti-tumor synergy between gemcitabine and albumin-bound paclitaxel (ABP) was demonstrated by Frese et al. who showed that ABP downregulates cytidine deaminase, leading to increased intratumoral gemcitabine (Cancer Disc 2012). Based on these data, we sought to assess the efficacy of ABP + gemcitabine in patients with SQCLC.a9ded1e5ce5d75814730bb4caaf49419 Method
This was a Simon two-stage phase 2 study of ABP + gemcitabine in chemotherapy-naïve, PD-L1 low/unknown advanced SQCLC patients (NCT02525653). Primary endpoint: best ORR. H0=25% (≥6/17 responses) and HA=45% (≥16/41 responses). ABP (100mg/m2) + gemcitabine (1000mg/m2) was initially given on D1, D8, D15 of an every 4 week cycle for up to 6 cycles (A1). After clearing H0, the study was amended to a 3 week cycle (D1, D8 treatment) and to allow maintenance ABP after C4 (A2). All patients underwent NGS by MSK-IMPACT.4c3880bb027f159e801041b1021e88e8 Result
N=27 patients were evaluable for the primary endpoint. Median age=70, age ≥70=60%, female=30%, median KPS=80%, smokers=93%. 46% of patients had PD-L1 IHC <50% (0-20%). 54% were PD-L1 unknown. Grade ≥3 related AEs included: fatigue-13%, neuropathy-4%; diarrhea-4%; lung infection-4%, anemia-9%; decreased platelet count-4%, and decreased neutrophils (4%). Four patients (17%) experienced related SAEs including, separately, G3 febrile neutropenia, G3 WBC decrease, G3 thrombocytopenia, and G3 anemia.
ORR for the entire cohort was 63% (Figure 1). ORR in A2= 71% (10/14). 8 patients in A1 had dose modifications resulting in equivalency to the A2 schedule. ORR in the A2+A1 dose modified cohort=73% (16/22), meeting the primary endpoint early. Median PFS=8mo; OS not yet mature.
ABP + gemcitabine is an effective and well-tolerated regimen in patients with untreated advanced SQCLC with a response rate exceeding that associated with platinum regimens and first-line immunotherapy.6f8b794f3246b0c1e1780bb4d4d5dc53