Virtual Library

Start Your Search

Lin Wu



Author of

  • +

    EP1.12 - Small Cell Lung Cancer/NET (ID 202)

    • Event: WCLC 2019
    • Type: E-Poster Viewing in the Exhibit Hall
    • Track: Small Cell Lung Cancer/NET
    • Presentations: 1
    • Now Available
    • Moderators:
    • Coordinates: 9/08/2019, 08:00 - 18:00, Exhibit Hall
    • +

      EP1.12-10 - Molecular Characterization of NSCLC-Like and SCLC-Like Subsets in Chinese Pulmonary Large-Cell Neuroendocrine Carcinoma (LCNEC) (Now Available) (ID 1341)

      08:00 - 18:00  |  Presenting Author(s): Lin Wu

      • Abstract
      • Slides

      Background

      LCNEC is an aggressive, biologically heterogenous carcinoma which can be molecularly characterized as SCLC-like and NSCLC-like. Accurate distinction of molecular subset is of major clinical relevance since it may guide treatment choices in LCNEC. Here we determined the genomic characteristics of the two LCNEC subsets in a Chinese cohort to clarify their correlations with traditional lung cancer histologies.

      Method

      FFPE samples from 31 LCNECs were sequenced using a 520-cancer-related gene panel, with an average sequencing depth of 1385X. Comparative mutational analysis was conducted between NSCLC-like LCNECs from our cohort and adenocarcinomas from TCGA dataset

      Result

      Despite similar clinical features in terms of stage and age at diagnosis, NSCLC-like (42%, 13/31) and SCLC-like (32%, 10/31) subsets from LCNEC displayed distinct molecular characteristics. NSCLC-like subset harbored significant higher mutation frequencies of STK11, KEAP1 and FAT3 (53.8%, 38.5% and 38.5%, p=.007, .046 and .046), while SCLC-like subset was characterized by highly mutated RB1 (100%, p<.001) and PTEN (50%, p=.007). Compared with TCGA adenocarcinomas, NSCLC-like LCNEC displayed more frequent mutations in TP53, STK11, APC, KMT2D and SMARCA4 (76.9%, 53.8%, 30.8%, 30.8% and 23.1%; p=.043, .004, .045, .005 and .049). In addition, potential targetable alterations were present in 46.2% (6/13) pts of NSCLC-like subset. For those advanced stage pts, 2/5 NSCLC-like and 5/5 SCLC-like pts received relevant chemotherapy according to their molecular characteristics. The clinical outcomes of these pts are still under follow-up.

      Conclusion

      This study demonstrates the distinct molecular features between NSCLC-like and SCLC-like subsets, and highlights the predominant genomic similarity and separate entities between NSCLC-like LCNEC with adenocarcinoma. Given the evidence that genomic profiling may aid in informing treatment decisions for pts with LCNEC, our study indicates that, based on accurate molecular typing, 46.2% NSCLC-like pts may benefit from potential targeted therapy and the rest of them may be more suitable to receive NSCLC-chemotherapy

      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.

  • +

    MA14 - The Adequate MTarget Is Still the Issue (ID 140)

    • Event: WCLC 2019
    • Type: Mini Oral Session
    • Track: Advanced NSCLC
    • Presentations: 1
    • Now Available
    • +

      MA14.01 - Clinical and Genomic Features of Chinese Lung Cancer Patients with Germline Mutations (Now Available) (ID 682)

      15:45 - 17:15  |  Author(s): Lin Wu

      • Abstract
      • Presentation
      • Slides

      Background

      Recent studies on next generation sequencing (NGS) data from cancer patients have demonstrated that germline mutations in genetic predisposition genes were more common than previous known in many cancer types including lung cancer. However, most previous studies have focused on western patient population and the germline mutation landscape in Asian lung cancer patients and the clinical and genomic features in these patients are largely unknown.

      Method

      NGS data from a targeted panel of 1,021 known cancer genes from paired cancer and germline DNA of 1,797 Chinese lung cancer patients was analyzed to identify pathogenic or likely pathogenic (P/LP) germline variants in predisposition genes based on American College of Medical Genetics and Genomics (ACMG) 2015 guideline.

      Result

      Totally, 5.95% of lung patients were found to harbor germline variants in 35 cancer predisposition genes. The prevalence of germline mutations was higher in patients under 40 compared to older counterparts (10.1% vs 5.74%, p=0.103, Chi-Square test ) although it did not reach statistical significance. However, germline BRCA1/2 mutations were associated with earlier age of onset (median 52.5 vs 60 years-old, p=0.0080 by Mann-Whitney test). Furthermore, patients with P/LP germline mutations had significantly more somatic mutations in KRAS (p=0.012, fisher’s exact test) and c-MET (p=0.018, fisher’s exact test) oncogenes, but less in tumor suppressor gene TP53 (p=0.019, fisher’s exact test). Compared to western lung cancer patients enrolled in TCGA, P/LP germline mutations in BRCA2, FANCA, ATM, MUTYH, BLM, TP53, BRCA1, CHEK2, PMS2, NBN and FANCC were identified in both current Chinese cohort and TCGA cohort with BRCA2 germline mutations significantly more common in Chinese cohort than TCGA cohort (p=0.015, Fisher’s exact test). In addition, RAD51D, FANCD2, BRIP1, MSH6, PMS1, PALB2, RAD51C, SDHA, TSC2, BAP1, CDH1, FLCN, NF1 and RUNX1) were exclusively identified in Chinese patients, while RET, ERCC3, FANCG and VHL were only detected in TCGA cohort.

      Conclusion

      These results implied that there might be both common and unique cancer predisposition germline mutations for lung cancer between Asian and Western patient populations.

      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.

  • +

    MA21 - Non EGFR/MET Targeted Therapies (ID 153)

    • Event: WCLC 2019
    • Type: Mini Oral Session
    • Track: Targeted Therapy
    • Presentations: 1
    • Now Available
    • +

      MA21.02 - Genomic Origin and EGFR-TKI Efficacy of Pulmonary Adenosquamous Carcinoma (Now Available) (ID 578)

      14:30 - 16:00  |  Author(s): Lin Wu

      • Abstract
      • Presentation
      • Slides

      Background

      Lung adenosquamous carcinoma (ASC) is a heterogeneous disease that comprises of both adenocarcinoma (AC) and squamous cell carcinoma (SCC) components. Their genomic profile, evolutionary origin, and clinical management remain controversial. Objective of this study is to define the genomic origin of this heterogeneous tumor by independent genomic analyses of the AC and SCC components.

      Method

      Surgical ASCs were collected. AC component and SCC component were obtained separately by microdissection, and Lymph node (LN) metastases were gathered. Targeted sequence was performed for the two components using a 1021-gene panel, independently. Evolutionary relationship of the two components was analyzed. The independent cohorts of adenocarcinoma (n=170) and squamous cell carcinomas (n=62) were used for comparison. EGFR and concomitant mutations with response to EGFR-TKI were analyzed. Retrospective 517 ASCs underwent EGFR detections were collected from 11 centers. Objective response rate (ORR), disease control rate (DCR) and progression free survival (PFS) were analyzed in EGFR-positive patients received EGFR-TKIs.

      Result

      28 ASCs were collected. NGS was performed on AC component and SCC component samples, respectively. The most frequent alterations in 28 ASCs were EGFR mutation (79%), TP53 mutation (68%), MAP3K1 mutation (14%), EGFR amplification (32%), and MDM2 amplification (18%). 27 patients had trunk variations in the both components suggesting the monoclonal origin of ASCs. The prevalence of trunk mutations was correlated to those of AC, indicating that ASC might originate from AC. Only one patient did not carry any trunk variations between AC and SCC components, which were clearly and geographically distinguishable under the microscope. 22 had AC component or/and SCC component specific variations suggesting the common event of branch evolution. The 23 LNs of 13 patients mainly contained AC and ASC components (AC, SCC, and ASC: 11, 1, and 11, respectively), and each of the LNs carried the trunk mutations of the primary ASC. Like pure AC, the alterations of L858R and Exon 19 Dels of EGFR were common in the 28 ASCs. Unfortunately, these patients have not been treated with TKIs. Further, of 517 retrospective ASCs from 11 centers, 51.8% were EGFR-positive. For the 129 EGFR-positive ASCs who had received TKIs, the ORR and DCR were 56.6% and 89.1%, respectively. The median PFS was 10.1 months (95% CI: 9.0-11.2).

      figure-1-wclc.jpg

      Conclusion

      The AC and SCC components share a monoclonal origin, and a majority have branching evolution. ASC may represent a subtype of adenocarcinoma with EGFR mutation being the most common genomic anomaly and sharing similar efficacy to EGFR-TKIs.

      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.

  • +

    OA03 - Systemic Therapies for SCLC: Novel Targets and Patients' Selection (ID 121)

    • Event: WCLC 2019
    • Type: Oral Session
    • Track: Small Cell Lung Cancer/NET
    • Presentations: 2
    • Now Available
    • +

      OA03.02 - Effect of Anlotinib in Advanced Small Cell Lung Cancer Patients Previously Received Chemoradiotherapy: A Subgroup Analysis in ALTER 1202 Trial (Now Available) (ID 1698)

      13:30 - 15:00  |  Author(s): Lin Wu

      • Abstract
      • Presentation
      • Slides

      Background

      The ALTER 1202 trial showed significant improvement in progress-free survival and well tolerant with anlotinib in advanced small cell lung cancer (SCLC) patients received at least two lines chemotherapy. Here, we reported the effect of anlotinib in patients previously received chemoradiotherapy.

      Method

      The ALTER 1202 was a randomized, double-blind phase 2 trial conducted at 11 centers in China. Patients with advanced SCLC that received at least two previous lines of chemotherapy were enrolled and randomized in a 2:1 ratio to receive either anlotinib or placebo until tumor progression or unacceptable toxicity. The subgroup analysis assessed the effect of anlotinib in patients with previous concurrent, sequential and alternate chemoradiotherapy. The primary outcome was progressive-free survival (PFS). The secondary outcomes were overall survival (OS), objective response rate, disease control rate and safety. Data are reported as per the 30 June 2018, data cutoff date. This trial is registered with ClinicalTrials.gov, number NCT03059797.

      Result

      Between March 30, 2017 and June 8, 2018, a total of 120 patients who met all eligibility criteria were randomly assigned to the anlotinib group (82 patients) or placebo group (38 patients). And 46 patients in anlotinib group and 22 patients in placebo group previously received chemoradiotherapy. Among them, the median PFS was 5.49 months (95% confidence interval [CI], 2.83 to 6.47) with anlotinib versus 0.69 months (95% CI, 0.66 to 0.76) with placebo (hazard ratio [HR], 0.14; 95% CI, 0.07 to 0.28; P<0.0001). Meanwhile, anlotinib significantly prolonged OS compared with placebo (9.49 months [95% CI, 7.29 to 12.68] versus 2.56 months [95% CI, 0.49 to 5.22]; HR, 0.46 [95% CI, 0.22 to 0.98]; P=0.0388) in patients previously received chemoradiotherapy. The most common adverse events were hypertension (39.13%), weight loss (39.13%), hypertriglyceridemia (36.96%) and leukopenia (30.43%). While, the most common grade 3 or worse adverse events were hypertension (15.22%), hypertriglyceridemia (10.87%), γ-glutamyl-transferase increased (8.70%).

      Conclusion

      Anlotinib improved PFS and OS in advanced SCLC patients previously received chemoradiotherapy and was well tolerated.

      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.

    • +

      OA03.05 - Characterization of Genomic Alterations in Chinese LCNEC and SCLC via Comprehensive Genomic Profiling (Now Available) (ID 1486)

      13:30 - 15:00  |  Presenting Author(s): Lin Wu

      • Abstract
      • Presentation
      • Slides

      Background

      LCNEC and SCLC are aggressive neuroendocrine carcinomas with overlap in clinical, histopathologic, morphologic and genomic features. Differential molecular features between the two subtypes have not been well elucidated, contributing the uncertainty for optimal clinical strategy for each subtype. Here we interrogated the genomic characteristics in LCNEC as compared to SCLC along with their histologically related subtypes: carcinoids and atypical carcinoids via comprehensive genomic profiling.

      Method

      FFPE samples from 31 LCNECs, 35 SCLCs, 14 carcinoids and 22 atypical carcinoids were sequenced in a CLIA-certified sequencing laboratory using 520-cancer-related gene panel, with an average sequencing depth of 1385X.

      Result

      Comparative mutational analysis revealed that both LCNEC and SCLC sub-cohorts displayed higher rate of TP53 alterations than that of carcinoid (p<0.001, p<0.001). SCLC patients harbored more RB1 and PIK3CA mutations than LCNECs (p<0.001, p=0.014) and carcinoids (p<0.001, p=0.018). In addition, mutation frequencies of LRP1B, FAT1, PRKDC, PIK3CA, NOTCH1, SPTA1 and EPHA3 in SCLC were significantly higher than that in carcinoid. Mutations in TP53 and RB1 occurred concurrently in 83% (29/35) SCLC patients, whereas in only 32.3% (10/31) LCNECs.(Fig.1) We further investigated the distribution of mutations across KEGG pathways and found that mutation frequencies in both HIF-1 and Notch signaling pathways were lower in LCNEC than SCLC (p=0.032, p=0.025). Copy number variation (CNV) analysis revealed that LCNEC and SCLC had comparable CNVs which were significantly higher than carcinoid (p<0.001, p<0.001) and atypical carcinoid (p=0.010, p=0.028). TMB analysis also revealed a comparable TMB status of LCNEC (12.7/Mb) and SCLC (11.9/Mb), and relatively lower TMB in both carcinoid (2.4/Mb, p<0.001, p<0.001) and atypical carcinoid (5.6/Mb, p=0.003, p=0.009) than LCNEC and SCLC.

      wclc lcnec figure 1.jpg

      Conclusion

      We demonstrated the differential genomic characteristics in the four subtypes of neuroendocrine carcinomas. Compared with SCLC, LCNEC has lower mutation frequencies in RB1, PIK3CA, as well as HIF-1 and Notch signaling pathways. In addition, LCNEC and SCLC had comparable CNV and TMB status, which significantly higher than that of carcinoids and atypical carcinoid.

      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.

  • +

    P2.12 - Small Cell Lung Cancer/NET (ID 180)

    • Event: WCLC 2019
    • Type: Poster Viewing in the Exhibit Hall
    • Track: Small Cell Lung Cancer/NET
    • Presentations: 2
    • Moderators:
    • Coordinates: 9/09/2019, 10:15 - 18:15, Exhibit Hall
    • +

      P2.12-11 - Quality of Life in ALTER1202 Trial of Anlotinib as Third-or Further Line Therapy for Advanced Small Cell Lung Cancer (SCLC): A Post-Hoc Analysis (ID 1300)

      10:15 - 18:15  |  Author(s): Lin Wu

      • Abstract
      • Slides

      Background

      Anlotinib significantly improved progress-free survival of advanced small cell lung cancer (SCLC) patients in ALTER1202 trial. In this post-hoc analysis, we assessed the effect of anlotinib on health-related quality of life in ALTER1202 trial.

      Method

      In the randomised, phase 2, multicentre ALTER1202 trial, patients with advanced SCLC that received at least two previous lines of chemotherapy were enrolled from 11 centers in China. Eligible patients were randomly assign (2:1) to receive anlotinib or placebo. Health-related quality of life was assessed by EQ-5D scores. Patients filled out questionnaires at screening period and the end of each treatment cycle.

      Result

      Between March 30, 2017 and June 8, 2018, a total of 120 patients were enrolled. There were 119 patients with completed questionnaires at screening period, and 106 patients completed questionnaires at the end of the first treatment cycle (76 in anlotinib group, 30 in placebo group). EQ-5D scores had no significant difference between baseline and the end of the first treatment cycle in patients with anlotinib (0.85 versus 0.85, P=0.706). The median EQ-5D VASscores were 80.0 versus 85.0 in anlotinib and placebo group respectively (P=0.323) at screening period, and 90.0 versus 82.5 at the end of the first treatment cycle (P=0.273). The change of EQ-5D VAS scores from baseline to the end of the first treatment cycle was statistically significant (P=0.001) in patients with anlotinib compared to patients with placebo.

      Conclusion

      This post-hoc analysis showed that anlotinib maintained health-related quality of life in advanced SCLC patients.

      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.

    • +

      P2.12-26 - The Impact of Anlotinib for Relapsed SCLC Patients with Brain Metastases: A Subgroup Analysis of ALTER 1202 (ID 489)

      10:15 - 18:15  |  Author(s): Lin Wu

      • Abstract
      • Slides

      Background

      ALTER1202 trial (NCT03059797), a multicentre, randomized, double-blind phase II study has demonstrated that anlotinib significantly prolonged progress-free survival (PFS) in relapsed SCLC patients as 3rdor further line treatment. Here, we performed a comparative analysis for patients with brain metastases in the placebo and anlotinib arms.

      Method

      Eligible either limited- or extensive-stage SCLC pts who failed ≥2 lines of chemotherapy (n=120) were randomized 2:1 to receive anlotinib or placebo (12 mg QD from day 1 to 14 of a 21-day cycle) till progression or intolerable toxicity. The primary endpoint was PFS. This subgroup analysis was based on patients with brain metastases at baseline.

      Result

      There are 30 pts with brain metastases in anlotinib and placebo groups (n=21 vs 9). Anlotinib significantly improved PFS (3.84 vs 0.76 months; HR = 0.15; 95% CI, 0.04–0.51; P = 0.0005) and OS (6.08 vs 2.56 months; HR = 0.26; 95% CI, 0.09–0.73; P = 0.0061) comparing to placebo in patients with brain metastases at baseline. In anlotinib group, loss of appetite (47.62%), loss of weight (42.86 %), leukopenia (38.10%) and hypertriglyceridemia (38.10%) were the most common adverse events (AEs); then, in placebo group were emesis (44.44%) and loss of appetite (33.33 %).

      Conclusion

      For patients with brain metastases in ALTER1202 trial, significant improvement in OS and PFS were found in anlotinib treated group with a manageable safety profile.

      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.