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Molecular Medicine

, Volume 21, Issue 1, pp 782–791 | Cite as

Human Leukocyte Antigen-G (HLA-G) Expression in Cancers: Roles in Immune Evasion, Metastasis and Target for Therapy

  • Aifen Lin
  • Wei-Hua Yan
Review Article

Abstract

Aberrant induction of human leukocyte antigen-G (HLA-G) expression has been observed in various malignancies and is strongly associated with tumor immune escape, metastasis and poor prognosis. To date, great achievements have been made in understanding the underlying mechanisms of HLA-G involved in tumor progression. HLA-G could lead to tumor evasion by inhibition of immune cell cytolysis, differentiation and proliferation and inhibition of cytokine production, induction of immune cell apoptosis, generation of regulatory cells and expansion of myeloid-derived suppressive cells and by impairment of chemotaxis. Moreover, HLA-G could arm tumor cells with a higher invasive and metastatic potential with the upregulation of tumor-promoting factor expression such as matrix metalloproteinases (MMPs), indicating that ectopic HLA-G expression could render multiple effects during the progression of malignancies. In this review, we summarized the mechanisms of HLA-G involved in promoting tumor cell immune escaping, metastasis and disease progression. Special attention will be paid to its significance as an attractive therapeutic target in cancers.

Notes

Acknowledgments

This work was supported by grants from the National Natural Science Foundation of China (31170879, 31370920, 81372247), the Natural Science Foundation of Zhejiang Province (LR13H160001) and the Zhejiang Provincial program for the cultivation of high-level innovative health talents.

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Authors and Affiliations

  1. 1.Medical Research Center, Taizhou Hospital of Zhejiang ProvinceWenzhou Medical UniversityLinhaiPeople’s Republic of China

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