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Antonella Cannella



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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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      162P - Monitoring of blood serum amyloid (SAA) to predict outcome of first-line pembrolizumab (P) in patients (pts) with advanced non-small cell lung cancer (ANSCLC) (ID 451)

      12:30 - 13:00  |  Author(s): Antonella Cannella

      • Abstract

      Background

      In melanoma pts, SAA inhibits the anti-tumor immune response by the expansion of IL-10-secreting neutrophils. We previously found that baseline high SAA was associated with early progressive disease (PD) in small cohort of ANSCLC pts receiving up-front P. Here we explored the relationship between dynamic monitoring of SAA and survival outcomes in an enlarged cohort.

      a9ded1e5ce5d75814730bb4caaf49419 Methods

      Pts with ANSCLC (PD-L1 ≥50%) receiving upfront P at our institution, were prospectively evaluated for blood SAA and radiological response at baseline and every 9 weeks during the treatment. The primary endpoint was progression-free survival (PFS), and secondary endpoints were overall survival (OS) and PD rate. The most accurate SAA cut-off to predict PFS was established with a ROC-analysis.

      20c51b5f4e9aeb5334c90ff072e6f928 Results

      We enrolled 37 consecutive pts. Pts characteristics: male/female (70/30%), number of sites <3/≥ 3 (30/70%), ECOG PS 0/≥ 1 (38/62%); never/former or current smokers (54/46%); median age 72.5 (range 59-86) years. Baseline SAA was > the ROC-derived cut-off (73.9 mg/L, AUC 0.77, 95% CI 0.6-0.9,p=0.002) in 11 (30%) pts. After a median follow-up of 11.5 months (m), pts with pre-treatment high SAA achieved worse PFS (1.4 vs not reached [NR], HR 0.11, 95%CI 0.03-0-41, p < 0.0001) andOS(7.2 vs NR, HR 0.07, 95%CI 0.01-0.37, p < 0.0001) compared with those having lower level. Baseline high SAA was also related to PD (p < 0.05). Combining SAA at baseline and the dynamic monitoring, the median PFS was 1.4 m (95%CI 0.6-4.4) when SAA remained high (n = 10) while was not reached at-12 m when SAA remained low (n = 12) or changed (n = 7)(p < 0.0001).The SAA monitoring was also associated with OS (p = 0.0003);the worst prognosis (median 7.2 m, 95%CI 5.4-13.6) was observed in pts maintaining high SAA.

      fd69c5cf902969e6fb71d043085ddee6 Conclusions

      Baseline high SAA predicts poor outcome in ANSCLC pts receiving 1stline P, supporting the potential immunosuppressive role. Considering the strong relationship between SAA monitoring and survival outcomes, the acquired resistance to P could be early and easily detected with a simple blood test. This prospective study is currently ongoing to increase the power and to confirm the predictive role of SAA including a control group.

      b651e8a99c4375feb982b7c2cad376e9 Legal entity responsible for the study

      Catholic University of Sacred Heart.

      213f68309caaa4ccc14d5f99789640ad Funding

      Has not received any funding.

      682889d0a1d3b50267a69346a750433d Disclosure

      All authors have declared no conflicts of interest.

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