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R. Perez Carrion



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    P2.10 - Poster Session 2 - Chemotherapy (ID 207)

    • Event: WCLC 2013
    • Type: Poster Session
    • Track: Medical Oncology
    • Presentations: 1
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      P2.10-004 - Addition of bevacuzimab (BEV) to pemetrexed (PEM) plus cisplatin (CIS) induction and PEM maintenance therapy in 1st line setting for treatment of advanced nonsquamous non small cell lung cancer (NS-NSCLC) - final results and safety update from a phase 2 study (ID 234)

      09:30 - 09:30  |  Author(s): R. Perez Carrion

      • Abstract

      Background
      1st line PEM+CIS induction chemotherapy (CT) followed by PEM maintenance and 1st line BEV-based CT followed by BEV maintenance offer clinical benefit (progression-free and overall survival; PFS and OS) in NS-NSCLC. This study explored efficacy and safety of 1st line induction PEM+CIS+BEV followed by maintenance PEM+BEV.

      Methods
      Patients with advanced NS-NSCLC and ECOG performance status (PS) 0-1 were planned to receive 4 cycles PEM 500 mg/m[2], CIS 75 mg/m[2], BEV 7.5 mg/kg, given every 3 weeks. In the absence of progressive disease (PD) and in the case of ECOG PS 0-1, patients could continue on PEM+BEV until PD or unacceptable toxicity. All patients received vitamin supplementation as per PEM label. Primary endpoint was PFS; secondary endpoints included OS, response rate and toxicity. PFS without Grade (G)4 toxicity was additionally assessed.

      Results
      109 patients were enrolled in 5 countries. Characteristics: median age 61 years, males/females 59/41%, ECOG PS 0/1 54/46%, stage IIIB/IV 9/91%, adenocarcinoma 91%. 72 patients (66%) received maintenance CT. Overall median (maximum) number of cycles were 8(34) for PEM+BEV and 4(4) for CIS. Median PFS was 6.9 months (90% CI 5.7, 8.3). Table 1 summarizes efficacy data; Table 2 presents G1-4 adverse event (AE) data, including AEs of special interest regarding BEV. 2 patients died from study-drug related toxicity (GI hemorrhage, pneumonia aspiration; during induction CT). Figure 1 Figure 2

      Conclusion
      In this study of PEM+CIS+BEV induction CT followed by PEM+BEV maintenance, median PFS was 6.9 months. The addition of BEV to PEM-CIS induction and PEM maintenance was associated with acceptable and expected toxicities. Main G3/4 toxicities included neutropenia and fatigue, hypertension was less common.

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    P3.06 - Poster Session 3 - Prognostic and Predictive Biomarkers (ID 178)

    • Event: WCLC 2013
    • Type: Poster Session
    • Track: Biology
    • Presentations: 1
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      P3.06-035 - Study of the correlations between SNPs in angiogenic genes and treatment response/ outcome in patients with advanced NSCLC (non-squamous histology) treated in first line with carboplatin, paclitaxel and bevacizumab (CPB). The ANGIOMET study. (ID 2664)

      09:30 - 09:30  |  Author(s): R. Perez Carrion

      • Abstract

      Background
      It has been demonstrated that the addition of bevacizumab to paclitaxel plus carboplatin (CPB) in the treatment of advanced NSCLC improves survival. Even though, there is a high variability in drug efficacy between patients, leading to different response rates. ANGIOMET is an exploratory study promoted by the SLCG in advanced NSCLC, non-squamous histologies (NS-NSCLC) treated in first line with a combination scheme based in CPB, designed to investigate the relationship between angiogenic mediators and the outcome and response to treatment. The primary end-point was progression-free survival (PFS), and the secondary end-points are the follows: OS, response-rates and toxicity profiles.

      Methods
      In this multicentric study, patients with stage IIIB/IV NS-NSCLC (ECOG status 0–2) were included and treated in first line with CPB. Peripheral blood samples were collected before treatment administration and DNA was purified from the leukocyte fraction. Ten SNPs of VEGF-pathway genes were genotyped in 186 samples by RT-PCR in duplicate. SNPs were related to PFS and OS (Kaplan-Meir method, log-rank test) and to response rate.

      Results
      10 SNPs were determined in 186 DNA samples. In this preliminary analysis there were data from 108 patients valid for PFS and OS analysis. Baseline characteristics of the patients were: median age, 63 years [37-80]; 74.5% male; 94.1% ECOG PS 0-1; 14% never-smokers, 100% caucasian; 89.7% adenocarcinomas, 2.8% large cell carcinomas; median number of CPB cycles was 4. There was no response assessment in 27 patients (25%), 30.6% PR, 31.5% SD and 13.0% PD. The SNP rs833061 (CC) in VEGFA correlated with lower response rates to CPB than the other genotypes (p=0.07). SNPs in KRAS and VEGFR2 were associated with PFS and/or OS in our cohort. The KRAS SNP rs10842513 (TT+CT) was associated with shorter PFS compared with the CC genotype (median: 5.39 vs 6.81 months; p=0.04, respectively). The VEGFR2 SNP rs2071559 (AA) was significantly associated with longer PFS and OS (Table 1). No significant differences in PFS or OS were observed according to other SNPs analyzed. Table 1: PFS and OS for VEGFR2 SNPrs2071559.

      PFS
      % Median (months) 95%CI p
      VEGFR2 (rs2071559)
      AA 25.6 9,408 5,084 - 13,732 0.01
      GG+AG 74.0 5,724 4,902 - 6,546
      OS
      % Median (months) 95%CI p
      VEGFR2 (rs2071559)
      AA 25.6 NR ---- 0.001
      GG+AG 74.0 12,270 8,760 – 15.780

      Conclusion
      These preliminary data indicate that genetic variation in VEGFR2, SNP rs2071559 variant AA, is associated with prognosis in advanced NS-NSCLC patients treated with CPB and may have predictive implications as biomarkers in patients treated with chemotherapy with bevacizumab. On behalf of the Spanish Lung Cancer Group (SLCG)