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Published in: BMC Cancer 1/2023

Open Access 01-12-2023 | Research

Prognostic significance of HLA-G in patients with colorectal cancer: a meta-analysis and bioinformatics analysis

Authors: Yingying Zhang, Siying He, Lisha Yu, Chao Shi, Yanyue Zhang, Shiyue Tang

Published in: BMC Cancer | Issue 1/2023

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Abstract

Purpose

Human leukocyte antigen-G (HLA-G) has been reported to be aberrantly expressed in colorectal cancer (CRC); however, its prognostic value remains controversial. Hence, our meta-analysis aims to assess the prognostic value of HLA-G in CRC patients based on published literature and The Cancer Genome Atlas (TCGA) datasets.

Methods

A systematic search was conducted on relevant studies retrieved from four electronic databases including PubMed, Embase, Web of Science and Cochrane Library. Hazard ratios (HRs) with 95% confidence intervals (CIs) were recorded to be applied as effective values. Fixed-effects models or random-effects models were applied on the basis of the value of heterogeneity (I 2). Publication bias was analyzed by Begg’s and Egger’s tests. In addition, the results were validated by using TCGA datasets.

Results

Thirteen studies comprising 3896 patients were incorporated into this meta-analysis. The pooled results showed that HLA-G expression was significantly associated with poor overall survival (OS) in both the univariate analysis (HR = 1.44, 95% CI: 1.14–1.83, P = 0.002) and the multivariate analysis (HR = 1.55, 95% CI: 1.23–1.95, P < 0.001). Nevertheless, the expression of HLA-G is not related to age, sex, tumor type, tumor differentiation, TNM stage, or distant metastasis but lymph node metastasis. Notably, the prognosis of colorectal cancer was not consistent with the analysis result from TCGA data.

Conclusion

HLA-G expression was significantly related to poor OS in CRC according to the results of our meta-analysis. However, we found that the prognostic significance was inconsistent with our results according to the TCGA data in CRC. Hence, more research is still needed to further illustrate the prognostic role of HLA-G in CRC.
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Metadata
Title
Prognostic significance of HLA-G in patients with colorectal cancer: a meta-analysis and bioinformatics analysis
Authors
Yingying Zhang
Siying He
Lisha Yu
Chao Shi
Yanyue Zhang
Shiyue Tang
Publication date
01-12-2023
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2023
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-023-11522-w

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