Abstract
Background and aims
Natural killer (NK) cells are critical innate effectors that respond to viral infections and contribute to immunopathology. Here, we aimed to investigate the role of NK cells in hepatitis B virus-related acute-on-chronic liver failure (HBV-ACLF) and elucidate the underlying mechanism by examining their phenotypic and functional profiles.
Methods
We included patients with HBV-ACLF (n = 37) and chronic hepatitis B (n = 19), and healthy controls (n = 13) in our study. We examined the phenotype and function of different subsets of peripheral NK cells using flow cytometry and RNA-sequencing analysis, and screened liver NK cells using immunohistochemistry. We detected inflammatory cytokines using a Luminex assay. In addition, we analyzed the relationships between these parameters and disease severity.
Results
Peripheral NK cells were decreased and characterized by high expression of caspase-3, Ki67, CXCR3, NKG2D, NKp46, CD107a, and GM-CSF, and typified by higher cell migration and immune response by RNA-sequencing analysis in patients with HBV-ACLF than in those with chronic hepatitis B. Accumulations of CXCL-10 and NK cells were found in the liver, and excessive production of CXCL-10 in the peripheral blood contributed to the apoptosis of NK cells in vitro. The decrease in NK cells was associated with the level of HBV DNA and disease severity and had good prognostic performance in predicting the outcome of patients with HBV-ACLF through AUROC analysis.
Conclusion
NK cells were significantly decreased and showed dysfunction of phenotypic and functional profiles across distinct subsets in the peripheral blood of patients with ACLF. Crosstalk between CXCL-10 and NK cells may mediate the unbalanced distribution of NK cells. Understanding the dysfunction and decrease in NK cells may provide new insights into ACLF pathogenesis.
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Data availability
The datasets generated for this study are available on request to the corresponding authors.
Abbreviations
- ACLF:
-
Acute-on-chronic liver failure
- MONO:
-
Monocytes
- NK:
-
Natural killer
- PLT:
-
Platelet
- HBV:
-
Hepatitis B virus
- HBG:
-
Hemoglobin
- IL:
-
Interleukin
- TBil:
-
Total bilirubin
- TNF:
-
Tumor necrosis factor
- ALT:
-
Alanine aminotransferase
- HLA-DR:
-
Human leukocyte antigen-DR
- AST:
-
Aspartate amino transaminase
- HC:
-
Healthy control
- ALB:
-
Albumin
- CHB:
-
Chronic hepatitis B
- sCr:
-
Serum creatine
- APASL:
-
Asian Pacific for the Study of Liver
- MELD:
-
Model for end-stage liver disease
- HCV:
-
Hepatitis C virus
- EDTA:
-
Ethylene diamine tetraacetic acid
- HIV:
-
Human immunodeficiency virus
- PBMC:
-
Peripheral blood mononuclear cells
- PT:
-
Prothrombin time
- G-CSF:
-
Granulocyte colony-stimulating factor
- PTA:
-
Prothrombin time activity
- GB:
-
Granzyme B
- INR:
-
International normalized ratio
- GM-CSF:
-
Granulocyte–macrophage colony-stimulating factor
- WBC:
-
White blood cell
- GO:
-
Gene ontology
- NEUT:
-
Neutrophils
- IFN-γ:
-
Interferin-γ
- LY:
-
Lymphocytes
- AUROC:
-
Area under the receiver operating characteristic curve
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Acknowledgements
The authors acknowledge the patients, study investigators, and coordinators for their contributions in this study.
Funding
We acknowledge funding support from the National Natural Innovation Fund (Project 81721002) and the National Key R&D Program of China (2017YFA0105703).
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H-JL, NY, XM, LT, S-SW, C-BZ, J-HY, H-YW, Y-YY, JL, S-YC, Z-QF, TY, KL, W-JC, M-JZ, CZ, J-YZ, Y-MJ, J-WS, XF and MS participated in the data acquisition and soluble cytokines analysis; H-JL, NY, RX, and F-SW designed the study; H-JL and NY performed analyses and interpretation of data; H-JL and NY wrote the first draft of the manuscript and incorporated revisions; H-JL, NY, RX, and F-SW prepared the final version. All authors approved the final manuscript to be published.
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Hua-Jie Li, Ning Yang, Xiuying Mu, Lili Tang, Song-Shan Wang, Chun-Bao Zhou, Jin-Hong Yuan, Hai-Yan Wang, Ying-Ying Yu, Jing Li, Si-Yuan Chen, Zhi-Qian Feng, Tao Yang, Kai Liu, Wen-Jing Cao, Ming-Ju Zhou, Chao Zhang, Ji-Yuan Zhang, Yan-Mei Jiao, Jin-Wen Song, Xing Fan, Ming Shi, Ruonan Xu and Fu-Sheng Wang declare that they have no conflict of interest.
Ethical approval
Ethical approvals were obtained from the Fifth Medical Center of Chinese PLA General Hospital, and the study was performed in accordance with the 1975 Declaration of Helsinki. Written informed consent was obtained from each participant prior to blood and liver sampling.
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Li, HJ., Yang, N., Mu, X. et al. Reduction of natural killer cells is associated with poor outcomes in patients with hepatitis B virus-related acute-on-chronic liver failure. Hepatol Int 16, 1398–1411 (2022). https://doi.org/10.1007/s12072-022-10386-9
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DOI: https://doi.org/10.1007/s12072-022-10386-9