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J. Garde



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    O15 - NSCLC - Chemotherapy II (ID 109)

    • Event: WCLC 2013
    • Type: Oral Abstract Session
    • Track: Medical Oncology
    • Presentations: 1
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      O15.02 - The Spanish Lung Cancer Group (SLCG) BRCA1-RAP80 Expression Customization (BREC) randomized phase III trial of customized chemotherapy in advanced non-small-cell lung cancer (NSCLC) patients with wild-type epidermal growth factor receptor (EGFR) (NCT00617656/GECP-BREC) (ID 1157)

      10:40 - 10:50  |  Author(s): J. Garde

      • Abstract
      • Presentation
      • Slides

      Background
      RAP80, a component of the BRCA1 complex, influenced outcome both in p with low BRCA1 expression treated with cisplatin (cis)/gemcitabine (gem) and in p with intermediate/high BRCA1 levels treated with cis/docetaxel (doc) or with doc alone in the SLCG phase II customized chemotherapy trial (NCT00883480). Based on these findings, the SLCG and the French Lung Cancer Group performed a prospective, randomized phase III trial in metastatic NSCLC patients to compare non-customized cis/doc with customized therapy customized according to BRCA1 and RAP80 mRNA expression levels.

      Methods
      From 2008 to 2013, patients with wild-type EGFR were randomized 1:1 to the control or experimental arm. Planned accrual was 391 patients. Treatment in the control arm was cis/doc, while patients in the experimental arm received treatment according to their BRCA1 and RAP80 levels: 1) those with low RAP80, regardless of BRCA1 levels, received cis/gem; 2) those with intermediate/high RAP80 and low/intermediate BRCA1 received cis/doc; and 3) those with intermediate/high RAP80 and high BRCA1 received doc alone. The primary endpoint was progression-free survival (PFS).

      Results
      At 15 October 2012, 279 patients had been included and the planned interim analysis was performed. PFS was 5.49 months (m) in the control and 4.38 m in the experimental arm (P=0.07). Overall survival (OS) was 12.66 m in the control and 8.52 m in the experimental arm (P=0.006). Response rate (RR) was 37.3% in the control and 27% in the experimental arm (P=0.07). In the multivariate analysis including PS, treatment arm, BRCA1, RAP80, histology, smoking status and metastatic site, only extrathoracic metastases were associated with an increased risk of progression (HR, 1.78; P=0.02). In a post hoc analysis restricted to patients with ECOG PS 0, PFS was 3.91 m in the control and 7.47 m in the experimental arm (P=0.01) for those with low RAP80 levels (experimental group 1). PFS for patients in experimental groups 1, 2 and 3 was 7.47, 7.01 and 3.22 m, respectively (P=0.02). OS for patients in experimental groups 1, 2 and 3 was 28.88, 15.86 and 11.81 m, respectively (P=0.04).

      Conclusion
      Based on the negative results for PFS at the interim analysis, accrual was closed on this study. The negative results may be due to the poor predictive capacity of RAP80 and/or to the inclusion of doc alone as a treatment in the experimental arm. In addition, doc/cis may not have been the ideal combination for the control arm. Customized chemotherapy could be further encouraged in oncogene-driven pan-negative patients with PS 0.

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    P1.06 - Poster Session 1 - Prognostic and Predictive Biomarkers (ID 161)

    • Event: WCLC 2013
    • Type: Poster Session
    • Track: Biology
    • Presentations: 1
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      P1.06-058 - The PHALCIS Trial (PHarmacogenomic ALimta CISplatin): A clinical trial in progress by The Spanish Lung Cancer Group (ID 3425)

      09:30 - 09:30  |  Author(s): J. Garde

      • Abstract

      Background
      The inherent molecular heterogeneity prevents the efforts to improve outcomes for patients with non-small cell lung cancer (NSCLC). Platinum doublets are the standard option for the treatment of advanced NSCLC, but none of the platinum-based combinations used offer a significant advantage over the others. Pemetrexed is an antifolate antimetabolite that inhibits several key folate-dependent enzymes, mainly thymidylate synthase (TS). A phase III trial conducted in the first-line setting of advanced NSCLC demonstrated that survival was statistically superior for cisplatin plus pemetrexed in patients with adenocarcinoma (12.6 versus 10.9 months; HR 0.84, P = 0.03), and large-cell carcinoma (10.4 versus 6.7 months; HR 0.67; P = 0.0 3 compared with cisplatin plus gemcitabine (1). Preclinical data have indicated that overexpression of TS correlates with reduced sensitivity to pemetrexed (2). Baseline expression of the TS gene is superior in squamous cell carcinoma compared with adenocarcinoma (P < 0.0001) (3). BRCA1 is a component of multiple DNA repair pathways and functions as a molecular determinant of response to a range of cytotoxic chemotherapeutics agents. The analysis of BRCA expression levels in patients who had received neoadjuvant gemcitabine/cisplatin chemotherapy found that patients with low levels of BRCA1 had longer survival (P = 0.01) compared to those with high expression levels (4). RAP80 is an interacting protein that form complexes with BRCA1 and could modulate the effect of BRCA1. In patients with non-squamous lung carcinoma, survival was influenced by RAP80 expression (5). Taking into account this background, the Spanish Lung Cancer Group has started a phase IIA study of pemetrexed plus cisplatin as first line treatment for advanced/metastatic non-squamous lung carcinoma. The availability of tissue samples for analysis of expression of BRCA1, RAP80 and thymidylate synthase is mandatory. The primary objective is response rate adjusted for different expression levels of BRCA1, RAP80 and TS. Secondary objectives are OS, TTP and toxicity profile of the combination and its relationship with the biomarkers. The expected total number of patients accrued will be 90. Forty-nine patients have been included up to now. References Scagliotti GV, Parikh P, Pawel J, et al. Phase III study comparing cisplatin plus gemcitabine with cisplatin plus pemetrexed in chemotherapy-naïve patients with advanced-stage non–small-cell lung cancer. J Clin Oncol 2008. Sigmond J, Backus HH, Wouters D, et al. Induction of resistance to the multitarged antifolate pemetrexed in WiDr human colon cancer cells is associated with thymidylate synthase overexpression. Biochem Pharmacol 2003. Ceppi P, Volante M, Saviozzi S, et al. Squamous cell carcinoma of the lung compared with other histotypes shows higher messenger RNA and protein levels for thymidylate synthase. Cancer 2006. Taron M, Rosell R, Felip E, et al. BRCA1 mRNA expression levels as an indicator of chemoresistance in lung cancer. Hum Mol Genet 2004. Rosell R, Perez-Roca L, Sanchez JJ, et al. Customized treatment in non-small cell lung cancer based on EGFR mutations and BRCA1 expression. PLoS ONE 2009.

      Methods
      Not applicable

      Results
      Not applicable

      Conclusion
      Not applicable

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    P3.09 - Poster Session 3 - Combined Modality (ID 214)

    • Event: WCLC 2013
    • Type: Poster Session
    • Track: Combined Modality
    • Presentations: 1
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      P3.09-016 - A phase II study of cisplatin and oral vinorelbine concomitantly with radiotherapy in locally advanced non-small-cell lung cancer treatment: Eficacy and safety results. (ID 2687)

      09:30 - 09:30  |  Author(s): J. Garde

      • Abstract

      Background
      It has been shown an improvement in survival with concurrent chemoradiation versus the sequential administration of both treatment modalities. In patients with unresectable stage III disease, chemotherapy may best be started soon after the diagnosis of unresectable NSCLC has been made. Cisplatin (CDDP) plus oral vinorelbine (OV) as induction and concomitant regimen with radiotherapy (RT) has shown good efficacy outcomes and safety profile (Vokes, Fournel, Krzakowski). The objective of this study was to evaluate the effectiveness and toxicities of the combination of CDDP and OV given at full doses concomitantly with RT in locally advanced (LA) non-small-cell lung cancer (NSCLC).

      Methods
      Between February 2010 and December 2011, 48 chemo-naïve patients (p) with histologically confirmed unresectable stage IIIA/IIIB LA NSCLC were treated. Treatment consisted of 4 cycles (cy) of OV 60 mg/m[2] on days 1 and 8 and CDDP 80 mg/m[2] every 3 weeks plus RT 66 Gy starting on day 1, cy 2. The primary objective is the overall response rate (ORR) using RECIST 1.0. A standard Fleming two stage design was used. The sample size calculated with a type 1 error of 0.05 and type 2 error of 0.01, taking P~0~ 20% and P~1~ 40%. The study was approved by the local Ethical Committees of the participating institutions.

      Results
      Patient’s characteristics were: Median age 61 years (range 34-72); ≥ 65y 42%; males 89.6%; PS0 42% / PS1 58%; smokers 52%; adenocarcinoma 30% / squamous 64%; stage IIIA 46% / IIIB 54%. Median of days between initial diagnosis and study start was 28 days. 75% p completed the treatment as per protocol. Relative dose intensities of OV and CDDP were 97%/98%, respectively. 14.7% of cy were delayed, 11.8% due to toxicity. Dose of day 8 OV was canceled or delayed in 8.2% of cy. Hematological toxicities (% p): grade (g) 3/4 neutropenia 33.3%; g3 anemia 12.5%; g3/4 thrombocytopenia 16.6%; febrile neutropenia concomitant during CT-RT 14.6%. Non-hematological toxicities (% p): g3 esophagitis 12.5%; g3 dyspnea 4.2%, g3 vomiting 4.2%, g3-4 infection 4.2%. 2 treatment-related deaths were reported, both during cycle 1. 42 p (87.5%) received RT, 7.1% under 60 Gy, 23.8% with RT delays or interruptions due to adverse events. 44 p were evaluable for response. ORR 77.3% [CI 95%, 62.2-88.5], DCR 88.6% [CR 2 p (4.5%), PR 32 p (72.7%), SD 5 p (11.4%)]. Median follow-up was 19 months (m) (range 0.47-39.4). Median progression free survival (PFS), 12 m [CI 95%, 7.3-16.6]; 1-year PFS, 48.3% [CI 95%, 33.6-63], 2-year PFS, 30% [CI 95%, 15.8-44.2]. Median time to progression (TTP), 13.3 m [CI 95%, 9.7-16.9]; 1-year TTP, 51.7% [CI 95%, 36.9-66.6], 2-year TTP, 33.3% [18.5-48.1]. Median overall survival was not reached; 1-year and 2-year survival rates were, 72.3% [CI 95%, 59.6-85.1] and 49.4% [CI 95%, 33.8-64.9], respectively.

      Conclusion
      This prospective phase II trial shows that the schedule of cisplatin plus oral vinorelbine concomitant with radiotherapy from 2[nd] cycle obtains a good efficacy with an acceptable safety profile. Clinical trial information: EudraCT Number: 2009-010436-17