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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Medicine+(Baltimore)
2018 ; 97
(25
): e11004
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Clinicopathological and prognostic significance of PD-L1 expression in sarcoma: A
systematic review and meta-analysis
#MMPMID29923984
Zheng C
; You W
; Wan P
; Jiang X
; Chen J
; Zheng Y
; Li W
; Tan J
; Zhang S
Medicine (Baltimore)
2018[Jun]; 97
(25
): e11004
PMID29923984
show ga
Programmed cell death-ligands 1 (PD-L1) is a key immune checkpoint protein and a
promising therapeutic target for malignancy tumor immunotherapy. The prognostic
value of PD-L1 in patients with bone and soft tissue sarcoma remains
controversial. Therefore, this meta-analysis is conducted to evaluate the
associations of PD-L1 expression with overall survival (OS), progression-free
survival (PFS), and clinicopathological characteristics of sarcomaA comprehensive
literature search of PubMed, Web of Science, Embase, and Cochrane Library was
conducted for relevant studies. A total of 14 studies published from 2013 to 2017
were included. The pooled hazard ratios (HRs) with 95% confidence intervals (CIs)
were extracted from included studies to assess the association between PD-L1
expression and OS, PFS of patients with sarcoma. Other relevant data were
extracted to evaluate the correlations of PD-L1 expression with risk and
clinicopathological characteristics of sarcoma. Stata 12.0 software was applied
to calculate the strength of association between PD-L1 expression and sarcoma.In
total, 14 articles containing 15 independent studies and 1,451 patients were
included in this meta-analysis. We found that the high PD-L1 expression was
associated with poorer overall survival (HR 1.27, 95% CI: 0.70-1.84 P?=?.000) and
poorer events-free survival (HR 2.05, 95% CI: 1.55-2.70, P?=?.000) in bone and
soft-tissue sarcoma patients. Additionally, we conducted subgroup analysis
according to histology type, ethnicity, target of PD-L1 assessment, cutoff, the
significant correlations with poor overall survival and events-free survival were
also observed. In contrast none of the clinicopathological characteristics
(gender, age, tumor site, tumor grade, tumor depth, tumor necrosis rate,
metastasis, recurrence, chemotherapy, radiotherapy) was found to be associated
with PD-L1 expression in our analysis.The findings from this meta-analysis
indicate that PD-L1 expression might be a useful predicative factor of poor
prognosis for patients with bone and soft tissue sarcoma.