Virtual Library

 x 
My Library Virtual Library FAQ

Start Your Search

T. Coyne



Author of

  • +

    P1.09 - Poster Session 1 - Combined Modality (ID 212)

    • Event: WCLC 2013
    • Type: Poster Session
    • Track: Combined Modality
    • Presentations: 1
    • +

      P1.09-011 - Phase I clinical trial assessing the MEK inhibitor selumetinib (AZD6244; ARRY-142886) with concomitant thoracic radiotherapy (RT) in patients with Stage III-IV non small cell lung cancer (NSCLC) (ID 1415)

      09:30 - 09:30  |  Author(s): T. Coyne

      • Abstract

      Background
      The RAS/RAF/MEK/ERK signalling cascade has a central role in cancer proliferation and in modulating response to treatment. RAS mutations can confer a radiation-refractory phenotype and MAPK signaling can be stimulated by treatment with ionizing radiation in non-small cell lung cancer (NSCLC). Selumetinib (AZD6244; ARRY-142886) is an orally available inhibitor of MEK1/2 which was shown to enhance the effect of radiotherapy in preclinical studies. This effect was due to the ability of selumetinib to directly sensitize tumor cells to the cytotoxic effect of radiation and to modulate tumor vessel functionality by reducing VEGF-A expression. In a Phase II study, selumetinib given in combination with docetaxel showed promising activity in NSCLC patients with KRAS activating mutations. Aim To determine the recommended Phase II dose (RP2D) of selumetinib in combination with standard dose thoracic radiotherapy (RT) in NSCLC.

      Methods
      Selumetinib (Hyd-Sulfate capsule) was administered orally twice daily as a single agent for one week and then in combination with thoracic RT for 6 to 6.5 weeks (60 to 66 Gy in 30 to 33 fractions) in a single institution, open label Phase I trial using a modified Fibonacci sequence. Prior standard chemotherapy was permitted with a minimum interval between day8 of the last cycle of chemotherapy and day1 of administration of selumetinib of ≥ 2weeks. Other eligibility included: histologic or cytologic diagnosis of NSCLC, stage III not suitable for concurrent chemo-radiotherapy or stage IV with dominant thoracic symptoms, disease encompassable within a radical RT treatment volume, ECOG PS 0-1., no prior RT or investigational agents.

      Results
      A total of six consecutive patients with inoperable stage III (n=3) or stage IV (n=3) NSCLC were given selumetinib 50 mg twice daily (dose level 1) with concomitant thoracic RT (59.8-66 Gy in 30-33 fractions). All patients completed the combined treatment. Selumetinib delivery was > 80%. Four out of the six patients had dose interruptions of 2-3 days due to expected adverse events (AEs). Skin rash (6/6), diarrhoea (5/6) and fatigue (4/6) were the most common toxicities. Grade 3/4 AEs included hypertension (2/6), diarrhoea (2/6), skin rash (1/6), pulmonary embolism (1/6), fatigue (1/6) and pericardial effusion (1/6). Pulmonary embolism (grade 3) was considered not related to the study treatment. One patient experienced dose limiting toxicity (DLT) consisting of a combination of diarrhoea (grade 3) and fatigue (grade 3). Response to treatment was assessed 4 weeks post RT. Distant recurrence was seen in 1 patient; 3 patients had SD, 1 patient experienced a PR and 1 a CR. Median duration of response was 2 months (range 1-4 months).

      Conclusion
      Selumetinib given at 50 mg twice daily with concomitant radical thoracic RT was tolerated with no unexpected toxicities or enhancement of expected RT toxicities. Although the protocol-defined criteria to further escalate the selumetinib dose were met, because of the heterogeneous and small patient cohort and AEs encountered further evaluation of the 50 mg twice daily was preferred in order to obtained additional safety data. An expanded cohort of 15 patients having additional FLT-PET scans.

  • +

    P2.09 - Poster Session 2 - Combined Modality (ID 213)

    • Event: WCLC 2013
    • Type: Poster Session
    • Track: Combined Modality
    • Presentations: 1
    • +

      P2.09-008 - Concurrent chemoradiotherapy (cCTRT) for locally advanced Non Small Cell Lung Cancer (NSCLC) followed by consolidation Pemetrexed: a phase II study (ID 1545)

      09:30 - 09:30  |  Author(s): T. Coyne

      • Abstract

      Background
      cCTRT is the current standard treatment for good Performance Status (PS) unresectable locally advanced NSCLC. A phase III study demonstrated that Docetaxel consolidation does not improve overall survival (OS) after cCTRT (Hanna. JCO 2008). The role of consolidation chemotherapy after cCTRT is still investigational and our study was set up to evaluate the role of pemetrexed in this setting. A less toxic consolidation chemotherapy may enable a higher proportion of patients to comply to planned treatment which may improve outcome.

      Methods
      This was a single-institution prospective phase II study. Treatment comprised cisplatin (50 mg/m[2] days 1, 8, 29, 36), etoposide (50 mg/m[2] days 1-5 and 29-33) and concurrent thoracic radiotherapy starting on day 1 chemotherapy (66 Gy in 33 daily fractions; 3D conformal radiotherapy or IMRT) followed by consolidation pemetrexed (500 mg/m[2] on days 71, 92 and 133). The primary endpoint was 1 year OS. Secondary endpoints were progression-free survival (PFS), 2 yr OS, acute/late toxicity (CTCAE v3.0), compliance to treatment.

      Results
      35 patients were recruited between March 2008 and October 2010. Median age was 61 years (range 42-76). M:F ratio was 23(66%):12(34%). ECOG PS was 0:1 11(31%):24(69%). Histology: squamous 21(60%), adenocarcinoma 8(23%), undifferentiated 4(11%), other 2(6%). Stage: IIB 1(3%), IIIA 19(54%), IIIB 15(43%). All 35(100%) had PETCT staging. All 35 patients received concurrent chemotherapy (dose reduction in 3 patients) and 32 (91%) received the planned 66Gy (range 56-66 Gy). The number of patients who completed pemetrexed were: cycle 1=25 (71%), cycle 2=22 (63%), cycle 3=16 (46%). Radiation parameters: Gross Tumour Volume (GTV) was median 60.2 cm[3] (range 11.4-274.4 cm[3]), V~20Gy ~median 30.4% (range 10.5-35.3%), During the concurrent phase, grade 3/4 toxicity was noted for: neutropenia 17(49%) anaemia 1(3%), thrombocytopenia 1(3%), infection 8(23%), fatigue 6(17%), nausea±vomiting 4(11%), mucositis 3(9%), anorexia 3(9%). During the pemetrexed consolidation phase, the only grade 3/4 toxicities were: infection 5(20%), anaemia 3(12%), neutropenia 2(8%) and fatigue 2(8%). Acute radiotherapy toxicity (<3months): oesophagitis grade 3/4 10(29%) and late toxicity (>3months): pneumonitis grade 3/4 2(7%), oesophageal stricture 2 (7%), pulmonary fibrosis 1(3%). Median follow up was 25months. Median OS was 34months, with 1yr OS 77% (95% CI 60-88%), and 2yr OS 61% (95% CI 37-72%). Median PFS was 22months, with 1yr PFS 62% (95% CI 43-76%) and 2yr 49% (95% CI 31-65%). Of the 14 deaths, causes were, 1 suicide during radiotherapy, 2 treatment-related deaths (1 grade 5 pneumonitis and 1 grade 5 haemoptysis) and 13 due to lung cancer.

      Conclusion
      In an unselected locally advanced NSCLC population, staged with PETCT a median survival of 34 months can be achieved. The study reinforces the challenge of delivering consolidation chemotherapy and suggests that improved staging contributes to improved outcomes. Although there was failure to deliver all planned cycles of consolidation pemetrexed after cCTRT in 54% of patients, these are encouraging results that warrant further investigation.