Cited by 451Extracellular vesicles in diseaseCancer Immunotherapy and BiomarkersEndoplasmic Reticulum Stress and Disease

Endoplasmic Reticulum Stress Causes Liver Cancer Cells to Release Exosomal miR‐23a‐3p and Up‐regulate Programmed Death Ligand 1 Expression in Macrophages

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Liu, Jiatao, Fan, Lulu, Yu, Hanqing, Zhang, Ju, He, Yong, Feng, Dechun, Wang, Fang, Li, Xiaoqiu +7 more·2019·Hepatology

Abstract

Endoplasmic reticulum (ER) stress promotes tumor cell escape from immunosurveillance. However, the underlying mechanisms remain unknown. We hypothesized that ER stress induces hepatocellular carcinoma (HCC) cells to release exosomes, which attenuate antitumor immunity by modulating the expression of programmed death ligand 1 (PD‐L1) in macrophages. In this study, we demonstrated that expression of several ER stress markers (glucose‐regulated protein 78, activating transcription factor 6, protein kinase R–like ER kinase, and inositol‐requiring enzyme 1α) was up‐regulated in HCC tissues and negatively correlated with the overall survival and clinicopathological scores in patients with HCC. Expression of ER stress–related proteins positively correlated with CD68 + macrophage recruitment and PD‐L1 expression in HCC tissues. High‐throughput sequencing analysis identified miR‐23a‐3p as one of the most abundant microRNAs in exosomes derived from tunicamycin (TM)‐treated HCC cells (Exo‐TMs). miR‐23a‐3p levels in HCC tissues negatively correlated with overall survival. Treatment with Exo‐TMs up‐regulated the expression of PD‐L1 in macrophages in vitro and in vivo . Bioinformatics analysis suggests that miR‐23a‐3p regulates PD‐L1 expression through the phosphatase and tensin homolog (PTEN)–phosphatidylinositol 3‐kinase–protein kinase B (AKT) pathway. This notion was confirmed by in vitro transfection and coculture experiments, which revealed that miR‐23a‐3p inhibited PTEN expression and subsequently elevated phosphorylated AKT and PD‐L1 expression in macrophages. Finally, coculture of T cells with Exo‐TM–stimulated macrophages decreased CD8 + T‐cell ratio and interleukin‐2 production but increased T‐cell apoptosis in vitro . Conclusion : ER‐stressed HCC cells release exosomes to up‐regulate PD‐L1 expression in macrophages, which subsequently inhibits T‐cell function through an exosome miR‐23a–PTEN–AKT pathway. Our findings provide insight into the mechanism how tumor cells escape from antitumor immunity.

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  • Abundant miR-23a-3p in exosomes of tetracycline-treated HCC cells inhibits PTEN mRNA level.

    “Abundant expression of miR-23a-3p was found in the exosomes of HCC cells treated with tetracycline, resulting in inhibition of PTEN mRNA level.”

    From Recent advances of miR-23 in human diseases and growth development (2025) · cites this paper as [77]

    The Abstract identifies the treatment as tunicamycin, not tetracycline. The Results report elevated miR-23a-3p in exosomes from those HCC cells and show that the exosomes reduced PTEN mRNA in co-cultured macrophages (Fig. 8A–C); the treatment named in the claim is therefore unsupported. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • Exosomes can effectively transmit the regulatory effects of miR-23.

    “The exosomes can effectively transmit the regulatory effects of miR-23 as a channel.”
  • miR-23a-3p enhances phosphorylated AKT and PD-L1 in macrophages and inhibits T cell function via the miR-23a-PTEN-AKT pathway.

    “Subsequently, it enhances the expression of phosphorylated AKT and PD-L1 in macrophages and inhibits T cell function by functioning on the miR-23a-PTEN-AKT pathway [77].”

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Authors
Liu, J., Fan, L., Yu, H., Zhang, J., He, Y., Feng, D., Wang, F., Li, X., Liu, Q., Li, Y., Guo, Z., Gao, B., Wei, W., Wang, H., & Sun, G.
Affiliations
  • First Affiliated Hospital of Anhui Medical University (CN)
  • National Institutes of Health (US)
  • Anhui Medical University (CN)
Corresponding author
  • Wang, Hua
  • Sun, Guoping
Venue
Hepatology
Published
2019-04-25
Volume
70
Issue
1
Pages
241-258
ISSN
  • 0270-9139 (ISSN-L)
  • 1527-3350
OpenAlex
W2922474621
Cited by
449
References
48
Citations by year
2026: 32 · 2025: 55 · 2024: 71 · 2023: 68 · 2022: 86 · 2021: 69 · 2020: 56 · 2019: 12
FWCI
18.44
Type
journal article
Language
en
Open access
Locations
  • Hepatology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Natural Science Foundation of China (81372577, 81522009, 81770588, 81872047, 81602115, 81572430)
  • National Institutes of Health
  • Natural Science Foundation of Anhui Province (1608085QH195)
  • National Institute on Alcohol Abuse and Alcoholism (ZIAAA000368, AA000369, Z01AA000368, Z01AA000369, AA000368, ZIAAA000369)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
Keywords
endoplasmic reticulum stress, hepatocellular carcinoma, exosomes, miR-23a-3p, PD-L1, tumor-associated macrophages, tumor immunosuppression, PTEN/AKT signaling, CD8+ T cells, tunicamycin, tumor microenvironment
MeSH terms
China, Carcinoma, Hepatocellular, Humans, Liver Neoplasms, Macrophages, T-Lymphocytes, MicroRNAs, Proto-Oncogene Proteins c-akt, PTEN Phosphohydrolase, Exosomes, Endoplasmic Reticulum Stress, B7-H1 Antigen

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