Author of

• 18502

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  P3.02c - Poster Session with Presenters Present (ID 472)

  • Event: WCLC 2016
  • Type: Poster Presenters Present
  • Track: Advanced NSCLC
  • Presentations: 1
  • Moderators:
  • Coordinates: 12/07/2016, 14:30 - 15:45, Hall B (Poster Area)

  • 18565

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    P3.02c-063 - Lactate Dehydrogenase (LDH) as a Surrogate Biomarker to Checkpoint-Inhibitors for Patient with Advanced Non–Small-Cell Lung Cancer (NSCLC) (ID 5073)

    14:30 - 14:30  |  Author(s): J. Aguilar-Company
    • Abstract

    Background:
    Effectiveness of immunotherapy has been observed in around 20% of cases, nowadays there is no accurate biomarker to select those patients (pts) who will benefit the most.
    
    Methods:
    We evaluated retrospectively pretreatment (baseline) and post-treatment (every 2 months) serum-LDH in 94 pts with NSCLC treated with anti-PD1/PDL1. Repeated measures ANOVA, Kaplan-Meier and the proportional COX model were used to examine the association of LDH with overall survival (OS). The cutoff level of LDH was 400 based on the median of the sample. (normal range 105-333 UI/L).
    
    Results:
    From July 2013 to February 2016, 94 pts were treated with immunotherapy based in anti-PD1 (77,6%) and anti-PDL1 (22,4 %), in trials at VHIO. Median age was 62 (39-86). Histological subtypes were: adecocarcinoma 53.2%, squamous 42.5%, others 4.2 %. The OS was significantly different in pts treated with immunotherapy according to baseline LDH, if LDH ≥ 400 median OS was 8.2 months, while in pts with LDH <400 median survival was not reached (Figure 1) Figure 1 There were statistically significant differences in the evolution of LDH, with better responses if there was a downward trend in LDH levels. In long responding pts (45 of 94 pts), defined as ≥ 3 evaluations (6 months), a LDH level at the time of 6 months treatment below than the baseline LDH predicts better responses (22/45 pts): 68.2% partial response (RP); 18.2% stable disease (SD); 13.6% disease progression (PD). In contrast, when LDH at third evaluation was higher than baseline LDH (23/45 pts): 39.1% PR; 56.5% SD; 4.3% PD, (p=0.022). There were differences between the level of LDH pre and post-progression. 66.67% of patients who progressed had a higher level of LDH at the time of progression than at the previous assessment (p=0.03).
    
    
    
    Conclusion:
    LDH may be a potential predictive biomarker of survival benefit conferred by immunotherapy in patients with NSCLC.