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JCSE01 - Joint IASLC-CSCO-CAALC Session (ID 63)
- Event: WCLC 2019
- Type: Joint IASLC-CSCO-CAALC Session
- Presentations: 1
- Moderators:Chunxue Bai, Tony Mok, Yi-Long Wu, Qing Zhou, Nan Wu
- Coordinates: 9/07/2019, 07:00 - 11:15, Toronto (1985)
JCSE01.21 - Changes of Peripheral Blood sPD-L1 in Patients with Small Cell Lung Cancer During Chemotherapy and Its Clinical Significance (ID 3435)
07:00 - 11:15 | Presenting Author(s): Hao Tian
As a new immunotherapeutic target, the inhibitors of programmed death 1 (PD-1) and programmed death ligand-1 (PD-L1) pathway have been used to treat a variety of tumors including small cell lung cancer (SCLC). However, the biomarkers now used to predict the efficacy of SCLC immunological checkpoint inhibitors are still in the exploratory phase. The aim of this prospective study was to investigate the prevalence and prognostic roles of soluble PD-L1(sPD-L1 ) protein in the blood of patients with lung cancer.
A total of 94 patients with SCLC who were diagnosed by histopathology or cytopathology between March 2018 to November 2018 were enrolled. Blood samples plasma were collected at the time of diagnosis. 17 samples of healthy subjects matching in sex and age from the Health care Center of the hospital were also studied as control. The level of sPD-L1 protein in the blood was measured using an enzyme-linked immunosorbent assay (ELISA). And the correlation of sPD-L1 expression with tumor stage, distant metastasis, and pro gastrin releasing peptide (ProGRP) was analyzed.
Expression of sPD-L1 in SCLC patients was significantly higher than healthy people(P<0.05).A cut-off value of 1.362ng/ml was distinguished in patients according to Receiver operating characteristic curve (ROC). Dynamic changes of sPD-L1 are associated with progressive disease（PD）a, partial response（PR）a and stable disease（SD）b in SCLC patients（a P<0.01，b P>0.05）.The expression of sPD-L1 in serum was positively correlated with ProGRP.
Our results indicated that changes of plasma SPD-L1 levels in SCLC patients are associated with prognosis. Plasma sPD-L1 protein is a great biomarker in SCLC and may play an important role in sifting the beneficiaries of immunotherapy.