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Lu Gan



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    Lunch & Poster Display session (ID 58)

    • Event: ELCC 2019
    • Type: Poster Display session
    • Track:
    • Presentations: 1
    • Moderators:
    • Coordinates: 4/11/2019, 12:30 - 13:00, Hall 1
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      170P - Advanced non-small cell lung cancer patients with low tumor mutation burden might derive benefit from anti-programmed cell death (PD)-1 and anti-programmed deathligand 1 (PD-L1) blockade (ID 194)

      12:30 - 13:00  |  Author(s): Lu Gan

      • Abstract

      Background

      We aimed to investigate the association between tumor mutation burden (TMB) and survival in non-small cell lung cancer (NSCLC) patients with anti–programmed cell death (PD)-1 and anti--programmed cell deathligand 1 (PD-L1) blockade.

      a9ded1e5ce5d75814730bb4caaf49419 Methods

      Five retrospective cohorts using PD1/PDL1 blockades and The Cancer Genome Atlas (TCGA) lung cancer data set were included in this study. The restricted cubic spline (RCS) analysis was used to explore the association between TMB and survival. The cut-off values for TMB were determined by X-tile software. Primary outcomes were overall survival (OS) and progression-free survival (PFS). The associations between TMB and intratumor heterogeneity, number of segments, fraction of genome alterations, aneuploidy score, and T cell populations were also investigated.

      20c51b5f4e9aeb5334c90ff072e6f928 Results

      TMB showed an inverted J-shaped curve with survival risk in RCS plot. Two cut-off values were determined by X-tile software in each cohort. In addition to high TMB, low TMB was an independent prognostic indicator for OS and PFS in NSCLC patients treated with PD1/PDL1 blockades. Objective response rate (ORR), disease control rate (DCR), and 1-year OS rate in the low TMB group were higher than that in the medium TMB group. In TCGA lung cancer data set, low TMB was also associated with longer OS in comparison with medium TMB. Furthermore, NSCLC patients with low TMB had significantly lower intratumor heterogeneity, number of segments, fraction of genome alterations, aneuploidy score, T helper type 2 (Th2) cells, and CD8+ T cells, but higher levels of Th1 and Th17 cells.

      fd69c5cf902969e6fb71d043085ddee6 Conclusions

      NSCLC patients with low TMB might benefit from anti-PD1/PDL1 immunotherapy.

      b651e8a99c4375feb982b7c2cad376e9 Legal entity responsible for the study

      The authors.

      213f68309caaa4ccc14d5f99789640ad Funding

      Has not received any funding.

      682889d0a1d3b50267a69346a750433d Disclosure

      All authors have declared no conflicts of interest.

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