Virtual Library

Start Your Search

Lauren Byers



Author of

  • +

    MS32 - SCLC - From Benchside to Bedside - Clinical Science Session (ID 810)

    • Event: WCLC 2018
    • Type: Mini Symposium
    • Track: Small Cell Lung Cancer/NET
    • Presentations: 2
    • Moderators:
    • Coordinates: 9/26/2018, 13:30 - 15:00, Room 107
    • +

      MS32.01 - Genetic Mouse Models (GEMMS) (ID 11540)

      13:30 - 13:45  |  Author(s): Lauren Byers

      • Abstract
      • Presentation
      • Slides

      Abstract not provided

      Only Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login, select "Add to Cart" and proceed to checkout. If you would like to become a member of IASLC, please click here.

      Only Active Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login or select "Add to Cart" and proceed to checkout.

    • +

      MS32.05 - Targeting DNA Damage and Repair (ID 11544)

      14:30 - 14:45  |  Presenting Author(s): Lauren Byers

      • Abstract
      • Presentation
      • Slides

      Abstract not provided

      Only Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login, select "Add to Cart" and proceed to checkout. If you would like to become a member of IASLC, please click here.

      Only Active Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login or select "Add to Cart" and proceed to checkout.

  • +

    OA13 - Therapeutics and Radiation for Small Cell Lung Cancer (ID 927)

    • Event: WCLC 2018
    • Type: Oral Abstract Session
    • Track: Small Cell Lung Cancer/NET
    • Presentations: 1
    • Moderators:
    • Coordinates: 9/26/2018, 10:30 - 12:00, Room 203 BD
    • +

      OA13.02 - Two Novel Immunotherapy Agents Targeting DLL3 in SCLC: Trials in Progress of AMG 757 and AMG 119 (ID 14538)

      10:40 - 10:50  |  Author(s): Lauren Byers

      • Abstract
      • Presentation
      • Slides

      Background
      Small cell lung cancer (SCLC) is an aggressive neuroendocrine tumor characterized by initial response to chemotherapy and radiotherapy followed by relapse or progression with chemoresistant disease. Delta-like ligand 3 (DLL3) is an inhibitory Notch ligand that is specifically upregulated in SCLC. IHC profiling of tumor samples showed DLL3 expression in 86% of SCLC tumors and minimal expression in normal tissue.
      We are conducting clinical trials of two novel immunotherapy agents that target DLL3. AMG 757 is a half-life extended bispecific T cell engager (BiTE®) antibody construct that is designed to transiently crosslink DLL3-positive SCLC cells to CD3-positive T cells and induce T cell–mediated tumor cell lysis and concomitant T cell proliferation. AMG 119 is an adoptive cellular therapy that consists of a patient’s autologous T cells that have been genetically modified ex vivo to express a transmembrane chimeric antigen receptor that targets DLL3 on the surface of SCLC cells. Both AMG 119 and AMG 757 showed potent killing of SCLC cell lines with a broad range of DLL3 expression in vitro and inhibition of tumor growth in the SHP-77 human SCLC xenograft model in vivo. AMG 757 was well tolerated in a preclinical multi-dose GLP toxicology study, with no evidence of tissue damage at weekly doses as high as 4.5 mg/kg.
      a9ded1e5ce5d75814730bb4caaf49419 Method
      NCT03319940 is an open label, phase 1 study evaluating the safety, tolerability and pharmacokinetics of AMG 757 that will initially enroll adult patients with SCLC who have progressed or recurred following platinum-based chemotherapy. Key inclusion criteria: ECOG PS 0–2, life expectancy ≥12 weeks, at least 2 measurable lesions per modified RECIST 1.1 criteria, and adequate organ function. The study will later enroll patients with extended disease SCLC with ongoing clinical benefit following no more than 6 cycles of first-line platinum-based chemotherapy. AMG 757 will be administered as an intravenous infusion once every 2 weeks.
      NCT03392064 is an open-label, phase 1 study evaluating the safety, tolerability and efficacy of AMG 119 in adult patients with SCLC whose disease has progressed or recurred after at least one platinum-based regimen. Key inclusion criteria: ECOG PS 0–1, at least 2 measurable lesions per modified RECIST 1.1 criteria, no evidence of CNS metastasis, and adequate organ function. AMG 119 will be administered as a one-time intravenous infusion.
      Both of these studies are currently enrolling patients. For more information, please contact Amgen Medical Information: medinfo@amgen.com.
      4c3880bb027f159e801041b1021e88e8

      Only Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login, select "Add to Cart" and proceed to checkout. If you would like to become a member of IASLC, please click here.

      Only Active Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login or select "Add to Cart" and proceed to checkout.

  • +

    P1.03 - Biology (Not CME Accredited Session) (ID 935)

    • Event: WCLC 2018
    • Type: Poster Viewing in the Exhibit Hall
    • Track:
    • Presentations: 1
    • Moderators:
    • Coordinates: 9/24/2018, 16:45 - 18:00, Exhibit Hall
    • +

      P1.03-13 - eIF2β, A Subunit of Translation-Initiation Factor EIF2, as a Potential Therapeutic Target for Non-Small Cell Lung Cancer (ID 11293)

      16:45 - 18:00  |  Author(s): Lauren Byers

      • Abstract
      • Slides

      Background

      To identify potential therapeutic targets for non-small cell lung cancer (NSCLC), we recently performed a semi-genome wide shRNA screen in a NSCLC cell line H460 . Through this approach, we identified multiple potential targets for NSCLC (Kakumu et al. Cancer Sci, 2017). In the present study, to search for genes with more generalized potential as therapeutic targets, we did shRNA screen using the alternative NSCLC cell line H358 and combined its results with those of our previous screen.

      a9ded1e5ce5d75814730bb4caaf49419 Method

      19 NSCLC cell lines, two cdk4/hTERT-immortalized normal human bronchial epithelial (HBEC) cell lines and primary NHBE culture were used. A semi-genome wide shRNA screen was performed with the DECIPHER library in H358, and its results were integrated with those of our previous screen in H460. Gene silencing was done with RNA interference followed by growth and cell cycle analyses.

      4c3880bb027f159e801041b1021e88e8 Result

      24 genes overlapped between results of two shRNA screens in H460 and H358 and we identified these as more generalized targets. Gene-annotation enrichment analysis showed that the RNA transport pathway including three genes is one of the overrepresented pathways in the 24 genes. Among the three genes, we determined to focus on eIF2β, a subunit of translation-initiation factor EIF2 because other two genes included in the RNA transport pathway, XPO1 and RAN are well characterized therapeutic targets for human cancers including lung cancer. eIF2β protein was more abundantly expressed in all the 19 lung cancer cell lines analyzed than in NHBE used as a control. To determine the clinical relevance of eIF2β in lung cancer, we examined eIF2β mRNA expression in lung adenocarcinoma tissues using TCGA dataset. These analyses showed significantly higher expression of eIF2β mRNA in lung adenocarcinoma tissues than in normal adjacent tissues. Importantly, we found that expression of eIF2β mRNA correlated with worse prognosis in patients with lung adenocarcinoma in multiple independent datasets, suggesting its potential as a prognostic marker. Next, we examined the effects of eIF2β knockdown on the growth of the H460 and H1975. Colorimetric growth and colony formation assays showed that eIF2β knockdown in H460 and H1975 suppresses cell growth and colony formation.

      8eea62084ca7e541d918e823422bd82e Conclusion

      eIF2β is highly expressed in NSCLC cells, and its expression correlates with poor prognosis in patients with lung adenocarcinoma. Knockdown of eIF2β caused G1 arrest in lung cancer cell lines. These results suggest that eIF2β is a potential therapeutic target for NSCLC and that it is a prognostic marker for lung adenocarcinoma.

      6f8b794f3246b0c1e1780bb4d4d5dc53

      Only Active Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login or select "Add to Cart" and proceed to checkout.

  • +

    P1.13 - Targeted Therapy (Not CME Accredited Session) (ID 945)

    • Event: WCLC 2018
    • Type: Poster Viewing in the Exhibit Hall
    • Track:
    • Presentations: 1
    • Moderators:
    • Coordinates: 9/24/2018, 16:45 - 18:00, Exhibit Hall
    • +

      P1.13-37 - Clinical Evaluation of Plasma-Based (cfDNA) Genomic Profiling in Over 1,000 Patients with Advanced Non-Small Cell Lung Cancer (ID 14332)

      16:45 - 18:00  |  Author(s): Lauren Byers

      • Abstract

      Background

      Tumor genomic information from a simple blood collection revealing actionable mutation can improve clinical outcome without the need for an invasive tissue biopsy. We report on the clinical utility of a cell-free DNA (cfDNA) next generation sequencing (NGS) blood test in our patients with non-small cell lung cancers (NSCLC) and the outcome of treatments with targeted therapies based on the reported mutations.

      a9ded1e5ce5d75814730bb4caaf49419 Method

      From May 2015 to February 2017, 1078 blood samples from 1011 consecutive patients with a diagnosis of NSCLC were collected and analyzed using next-generation sequencing of cfDNA with a panel of up to 70 cancer-related genes at a CLIA-certified lab (Guardant360, Guardant Health, Redwood City, CA) with reported sensitivity of 0.02% mutant allele fraction with high specificity (> 99.9999%) (CCR 2018 (17):3831). Patients in this retrospective study received targeted therapy as indicated by cfDNA molecular profiling. Tumor response was evaluated by RECIST V1.1 and standard clinical evaluation.

      4c3880bb027f159e801041b1021e88e8 Result

      From 1011 patients, 1078 cfDNA tests sent (additional follow-up tests: 1 in 64 patients and 2 in 3 patients). In 223/1011 (22%) patients had cfDNA report with at least 1 targetable mutations; with 48/223 (22%) patients meeting criteria for this retrospective review. Study population were 31 female:17 male, median age of 63 years (ranged:31-94). The rationale for the blood test included: insufficient tissue or not available (32%), addition to tissue molecular analysis (17%), alternative to tissue biopsy(10%), on-going treatment evaluation/resistance (41%). Mutations included:EGFR T790M (15), EGFR exon 19del (12), EGFR L858R (9), EGFR exon 20 insertion (4), EGFR others (1), ALK gene fusions (5) and MET exon 14 skipping (2). The median line of therapy was 2(ranged:1-7) with 28 patients receiving TKI as 1st line of therapy based on cfDNA mutations. With targeted treatments based on ctDNA results, the responses (RECIST V1.1) were: CR(3), PR(26), SD(14) and PD(4); median PFS was 8.5 months (ranged:1-26mos) for the overall population with 4 patients still receiving targeted therapy. Median PFS was 9.5 months (ranged:1-20 months) for those receiving TKI as 1st line.

      8eea62084ca7e541d918e823422bd82e Conclusion

      This is the largest analysis of response rates with cfDNA directed therapy in advanced NSCLC and demonstrates positive clinical outcomes in patients treated with targeted therapy based on plasma identified biomarkers.

      6f8b794f3246b0c1e1780bb4d4d5dc53

  • +

    P2.13 - Targeted Therapy (Not CME Accredited Session) (ID 962)

    • Event: WCLC 2018
    • Type: Poster Viewing in the Exhibit Hall
    • Track:
    • Presentations: 1
    • Moderators:
    • Coordinates: 9/25/2018, 16:45 - 18:00, Exhibit Hall
    • +

      P2.13-10 - Ph I/II Study of Oral Selective AXL Inhibitor Bemcentinib (BGB324) in Combination with Erlotinib in pts with EGFRm NSCLC   (ID 14272)

      16:45 - 18:00  |  Presenting Author(s): Lauren Byers

      • Abstract

      Background

      Bemcentinib is a first-in-class, oral, selective AXL TKI which is being evaluated as a combination therapy across several phII clinical trials. Increased AXL expression is associated with innate immune suppression and the appearance of resistance to targeted therapies in models of NSCLC and pt samples. AXL inhibition via bemcentinib prevents the appearance of such resistance in vivo and has shown immunomodulatory effect in AML patients.

      a9ded1e5ce5d75814730bb4caaf49419 Method

      This study was designed to confirm the safety and tolerability of bemcentinib as a monotherapy and when administered in combination with erlotinib (arm A). Pts with activating EGFR mutation driven NSCLC who had progressed on an approved EGFR inhibitor (arm B) or were receiving erlotinib in the first line setting (arm C) were treated with bemcentinib at RP2D in combination with full dose erlotinib to evaluate the potential of bemcentinib to reverse or prevent resistance to EGFR targeted therapy, respectively. Plasma protein biomarker levels were measured using the DiscoveryMap v3.3 panel (Myriad RBM) at C1D1 and C2D1.

      4c3880bb027f159e801041b1021e88e8 Result

      2 out of 8 pts (25%) with stage IV disease who received bemcentinib monotherapy achieved SD for close to 1 year including evidence of tumour shrinkage of 19% in 1 pt. 1 pt who had progressed on previous erlotinib monotherapy (12.5%) achieved a PR receiving bemcentinib in combination with erlotinib and remains on treatment well beyond 2 years later (arm A). A further 3 pts had SD at 6 wks. 11 patients (4 female, median age 58; 38-67) were enrolled in arm B and had received a median of 2 (1 - 4) previous lines of cytotoxic chemotherapy and a median of 2 previous EGFR inhibitors. 2 of these 11 pts (18%) including 1 pt who was refractory to erlotinib therapy at the onset of combination therapy remain on treatment more than 6 months into therapy at the time of writing with best responses of PR and SD, respectively. 1 further pt had SD at 6 weeks. The most common treatment-related AEs have been gastrointestinal and rash.There was no evidence of any impact of bemcentinib on erlotinib pharmacokinetics. Protein biomarkers predictive of pt benefit following bemcentinib treatment were identified.

      8eea62084ca7e541d918e823422bd82e Conclusion

      Bemcentinib can be safely administered in combination with erlotinib to pts with NSCLC and achieves additional benefit in a proportion of patients who do not have T790M and have progressed on EGFR inhibition or are maintained on erlotinib alone. Clinical trial information: NCT02424617.

      6f8b794f3246b0c1e1780bb4d4d5dc53

  • +

    P3.12 - Small Cell Lung Cancer/NET (Not CME Accredited Session) (ID 978)

    • Event: WCLC 2018
    • Type: Poster Viewing in the Exhibit Hall
    • Track:
    • Presentations: 1
    • Moderators:
    • Coordinates: 9/26/2018, 12:00 - 13:30, Exhibit Hall
    • +

      P3.12-06 - SLFN11 Expression and Efficacy of PARP Inhibitor Therapy in Extensive Stage Small Cell Lung Cancer: ECOG-ACRIN 2511 Study (ID 14113)

      12:00 - 13:30  |  Author(s): Lauren Byers

      • Abstract

      Background

      Veliparib (V),an oral small molecule inhibitor of poly (ADP) ribose polymerase (PARP) enhanced cytotoxic chemotherapy in preclinical models of small cell lung cancer (SCLC). The combination of V with cisplatin/etoposide (CE) doublet showed efficacy improvement as first-line therapy of extensive stage SCLC (ES-SCLC) with adjusted PFS HR: 0.63 1-sided p=0.01. There was differential treatment effect by strata (adjusted treatment HR comparing CE+V: CE: 0.34; 80% CI: 0.22 - 0.51; 1-sided p<0.001 for male patients with high tumor burden versus adjusted HR: 0.81 80% CI: 0.60 - 1.09; 1-sided p=0.18 for other patients subsets) highlighting the need to identify patient subset most likely to benefit. SLFN11 expression was previously shown to be associated with benefit of V when combined with temozolomide in relapsed SCLC and also predicted benefit of CE in preclinical models. We assessed the utility of SLFN11 as a predictive biomarker in the context of E2511 frontline clinical trial.

      a9ded1e5ce5d75814730bb4caaf49419 Method

      Archival tissue samples collected from patients with ES-SCLC enrolled and treated on E2511 study was employed for biomarker analysis looking at SLFN11 expression by immunohistochemistry. The study has 88% power to detect a PFS hazard ratio of 0.5 comparing SLFN11 (+) and (-) patients using a one-sided 0.025 level logrank test.

      4c3880bb027f159e801041b1021e88e8 Result

      There was an imbalance between control and experimental arms in the Male/abnormal LDH stratum (in strata) with respect to Age: p=0.006; malignant pleural effusion: p=0.095 and T stage: p=0.02. Median PFS was 5.1 mos on CE (95% CI 4.1-6.1) vs. 6.2 mos on CE+V (95% CI 5.9-8.8); HR=0.32, p=0.002 (unadjusted); median OS on CE was 8.8 mos (95% CI 6.6-11.1) vs. 9.5 mos on CE+V (95% CI 7.8-12.8); HR=0.76, p=0.39. Clinical outcome differences based on SLFN11 expression is ongoing and will be presented at the meeting.

      8eea62084ca7e541d918e823422bd82e Conclusion

      Pending ongoing analysis of correaltion of biomarker with clinical outcomes

      6f8b794f3246b0c1e1780bb4d4d5dc53