scholarly journals Association among cytokine profiles of innate and adaptive immune responses and clinical-virological features in untreated patients with chronic hepatitis B

2019 ◽  
Author(s):  
Yurong Gu ◽  
Yifan Lian ◽  
Qiaolan Zheng ◽  
Zexuan Huang ◽  
Lin Gu ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Hepatitis ◽  
Hepatitis B ◽  
Natural Killer ◽  
Chronic Hepatitis B ◽  
Cd8 T Cells ◽  
Nkt Cells ◽  
Adaptive Immune ◽  
Tnf Α ◽  
Ifn Γ

Abstract Background Complete clearance of intracellular viruses depends on effector cells of innate and adaptive immune system. This study aimed to identify the relationship between antiviral cytokines produced by natural killer (NK) and T cells and clinical-virological characteristics in untreated chronic hepatitis B (CHB) patients. Methods We measured antiviral cytokines interferon-gamma (IFN-γ), tumor necrosis factor-alpha (TNF-α), and interleukin-2 (IL-2) produced by T, NK and natural killer T (NKT) cells in a cohort of chronic hepatitis B virus (HBV) infection (CHB). We also correlated these cytokines with clinical-virological characteristics using a linear regression model. Results IFN-γ+ and TNF-α+ by CD4+ and CD8+ T cells were significantly higher in immune active (IA) than other phases. Immune tolerant (IT) patients showed the least expression of IFN-γ+ by NK and NKT cells, and TNF-α+ by NK cells. IFN-γ+, TNF-α+ and IL-2+ by CD4+ and CD8+ T cells were comparable between IA and gray zones (GZ) phases. Principal component analysis based on cytokines confirmed that most IT patients significantly differ from inactive carriers (IC) and IA patients, while GZ patients were widely scattered. Multivariate analysis showed both T and NK cells producing IFN-γ+ and TNF-α+, but not IL-2+, had significant association with serum alanine aminotransferase (ALT). Moreover, IFN-γ+ by NKT cells was associated with HBV DNA, while IFN-γ+ by CD4+ and CD8+ T cells had correlation with age. Conclusion HBV clinical phases are characterized by distinct cytokines signatures, which showed little relationship to viral features at a single time point in these untreated CHB patients.

scholarly journals Association among cytokine profiles of innate and adaptive immune responses and clinical-virological features in untreated patients with chronic hepatitis B

2019 ◽  
Author(s):  
Yurong Gu ◽  
Yifan Lian ◽  
Qiaolan Zheng ◽  
Zexuan Huang ◽  
Lin Gu ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Hepatitis ◽  
Hepatitis B ◽  
Natural Killer ◽  
Chronic Hepatitis B ◽  
Cd8 T Cells ◽  
Nkt Cells ◽  
Adaptive Immune ◽  
Tnf Α ◽  
Ifn Γ

Abstract Background Complete clearance of intracellular viruses depends on effector cells of innate and adaptive immune system. This study aimed to identify the relationship between antiviral cytokines produced by natural killer (NK) and T cells and clinical-virological characteristics in untreated chronic hepatitis B (CHB) patients. Methods We measured antiviral cytokines interferon-gamma (IFN-γ), tumor necrosis factor-alpha (TNF-α), and interleukin-2 (IL-2) produced by T, NK and natural killer T (NKT) cells in a cohort of chronic hepatitis B virus (HBV) infection (CHB). We also correlated these cytokines with clinical-virological characteristics using a linear regression model. Results IFN-γ+ and TNF-α+ by CD4+ and CD8+ T cells were significantly higher in immune active (IA) than other phases. Immune tolerant (IT) patients showed the least expression of IFN-γ+ by NK and NKT cells, and TNF-α+ by NK cells. IFN-γ+, TNF-α+ and IL-2+ by CD4+ and CD8+ T cells were comparable between IA and gray zones (GZ) phases. Principal component analysis based on cytokines confirmed that most IT patients significantly differ from inactive carriers (IC) and IA patients, while GZ patients were widely scattered. Multivariate analysis showed both T and NK cells producing IFN-γ+ and TNF-α+, but not IL-2+, had significant association with serum alanine aminotransferase (ALT). Moreover, IFN-γ+ by NKT cells was associated with HBV DNA, while IFN-γ+ by CD4+ and CD8+ T cells had correlation with age. Conclusion HBV clinical phases are characterized by distinct cytokines signatures, which showed little relationship to viral features at a single time point in these untreated CHB patients.

scholarly journals Association among cytokine profiles of innate and adaptive immune responses and clinical-virological features in untreated patients with chronic hepatitis B

2020 ◽  
Author(s):  
Yurong Gu ◽  
Yifan Lian ◽  
Qiaolan Zheng ◽  
Zexuan Huang ◽  
Lin Gu ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Hepatitis ◽  
Hepatitis B ◽  
Natural Killer ◽  
Chronic Hepatitis B ◽  
Cd8 T Cells ◽  
Nkt Cells ◽  
Adaptive Immune ◽  
Tnf Α ◽  
Ifn Γ

Abstract Background: Complete clearance of intracellular viruses depends on effector cells of innate and adaptive immune systems. This study aimed to identify the relationships among antiviral cytokines produced by natural killer (NK) and T cells and clinical-virological characteristics in untreated chronic hepatitis B (CHB) patients. Methods: We measured antiviral cytokines interferon-gamma (IFN-γ), tumor necrosis factor-alpha (TNF-α), and interleukin-2 (IL-2) produced by T, NK and natural killer T (NKT) cells, respectively, in a cohort with chronic hepatitis B virus (HBV) infection (CHB). We also correlated these cytokines with clinical-virological characteristics using a linear regression model. Results: levels of IFN-γ + and TNF-α + CD4 + and CD8 + T cells were significantly higher in immune active (IA) phase than in other phases. Immune tolerant (IT) patients showed the lowest expression of IFN-γ by NK and NKT cells, and TNF-α by NK cells. IFN-γ + , TNF-α + and IL-2 + CD4 + and CD8 + T cells frequencies were similar between IA and gray zone (GZ) phases. Principal component analysis based on cytokines confirmed that most IT patients significantly differed from inactive carriers (IC) and IA patients, while GZ patients were widely scattered. Multivariate analysis showed both T and NK cells producing IFN-γ and TNF-α, but not IL-2, had significant association with serum alanine aminotransferase (ALT). Moreover, IFN-γ + NKT cells were associated with HBV DNA, while IFN-γ + CD4 + and CD8 + T cells were correlated with age. Conclusion : HBV clinical phases are characterized by distinct cytokine signatures, which showed relationship to viral features in these untreated CHB patients.

CD8+CD28− T cells: key cytotoxic players impacting disease pathogenesis in chronic HBV infection

2019 ◽  
Vol 133 (17) ◽  
pp. 1917-1934
Author(s):  
Madhuparna Nandi ◽  
Sourina Pal ◽  
Sumantra Ghosh ◽  
Bidhan Chandra Chakraborty ◽  
Debangana Dey ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Hepatitis ◽  
T Cell ◽  
Hepatitis B ◽  
Chronic Hepatitis B ◽  
Peripheral Blood ◽  
Cd4 T Cells ◽  
Hepatitis B E Antigen ◽  
Tnf Α ◽  
Ifn Γ

Abstract During chronic hepatitis B (CHB), CD8+ T cells down-regulate CD28, the primary co-stimulation molecule for T-cell activation. Diverse functional attributes of CD8+CD28− T cells are suggested in various disease contexts. The present study aimed to characterize CD8+CD28− T cells in different phases of chronic Hepatitis B virus (HBV) infection (CHI)- Immune-tolerance (IT), Hepatitis B e-antigen-positive CHB (EP-CHB), Inactive carriers (IC) and Hepatitis B e-antigen-negative CHB (EN-CHB), to appraise their contribution in HBV-related disease pathophysiology. Flow cytometry analysis of T cells in peripheral blood of study subjects revealed enhanced CD8+CD28− T-cell accumulation in EP-/EN-CHB, compared with IT/IC and they expanded equivalently in HBV-specific and non-specific CD8+ T-cell compartments. Profound increase in CD8+CD28− T cells expressing perforin/granzyme-B/CD57/IFN-γ/TNF-α and markers of terminal differentiation were observed exclusively in EP-/EN-CHB. Further, activation with anti-NKG2D resulted in heightened IFN-γ/TNF-α production selectively from CD8+CD28− T cells, suggesting NKG2D-mediated alternative co-stimulation. CD8+CD28− T cells sorted from CHB patients induced enhanced apoptosis of peripheral blood mononuclear cells (PBMC), including CD4+ T cells. However, NKG2D-ligand (major histocompatibility complex class I chain-related molecule A/B (MICA/B)) was preferentially expressed by HBV-specific CD4+ T cells of CHB patients, making these cells a potential target to NKG2D-dependent CD8+CD28− T-cell killing. Both CD28+ and CD28− T cells in CHB expressed CXCR3 at similar levels and thus capable of homing to the liver. A positive correlation was seen between CD8+CD28− T-cell frequency and serum-alanine transaminase (ALT) levels and CHB-derived CD8+CD28− T cells caused pronounced cell death in HBV-transfected Huh7 cells. Immunofluorescence staining identified greater intrahepatic incidence of CD8+CD28− T cells but decline in CD4+ T cells in CHB than IC. Collectively, CD8+CD28− T cells demonstrated differential distribution and phenotypic/functional skewing in different CHI phases and contribute to disease progression by Perforin-Granzyme- or IFN-γ-TNF-α-mediated cytotoxicity while restraining antiviral immunity through NKG2D-dependent HBV-specific CD4+ T-cell depletion.

scholarly journals The Characteristics of Natural Killer Cells and T Cells Vary With the Natural History of Chronic Hepatitis B in Children

2021 ◽  
Vol 9 ◽  
Author(s):  
Yingzhi Zhou ◽  
Yi He ◽  
Yunan Chang ◽  
Xiaorong Peng ◽  
Ruiqiu Zhao ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Hepatitis ◽  
Hepatitis B ◽  
Nk Cells ◽  
Cd8 T Cells ◽  
Immune Status ◽  
Healthy Controls ◽  
Tnf Α ◽  
Treatment Naïve ◽  
Ifn Γ

Background and Aims: The immune status of children with chronic hepatitis B (CHB) in different phases is still unclear. The aim of this study was to investigate the phenotype and cytokine-producing ability of natural killer (NK) and T cells and to better understand the immune characteristics of children with different phases of CHB.Methods: Treatment-naive children with CHB were divided into groups with different clinical phases of CHB. Fresh peripheral blood drawn from hepatitis B virus (HBV)-infected and healthy children was processed to perform flow cytometric analysis.Results: A total of 112 treatment-naive children with CHB and 16 comparable healthy controls were included in this study. The expression of HLA-DR on NK cells and CD38 on T cells were upregulated, especially in the IA phase, in children with CHB compared with healthy controls. The ability of circulating NK cells instead of CD8+ T cells to produce IFN-γ in children with CHB was slightly increased, but TNF-α production seemed to be decreased compared with that in healthy controls. The expression of some activation markers varied among children with different phases of CHB, especially the higher CD38 expression found on T cells in the IA phase. Regression analysis revealed that IFN-γ and TNF-α production by NK cells and CD8+ T cells seemed to have positive correlations with ALT elevation and an activated status of NK cells or T cells.Conclusion: NK cells and T cells tended to be phenotypically activated (especially in the IA phase) in children with CHB compared with healthy controls. However, their cytokine-producing function was not obviously elevated, especially IFN-γ production by CD8+ T cells. More studies investigating the mechanism and observing the longitudinal changes in the immune status in children with CHB are needed.

scholarly journals In Vivo Bioluminescence Imaging of HBV Replicating Hepatocytes Allows for the Monitoring of Anti-Viral Immunity

Viruses ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2273
Author(s):  
Katrin Manske ◽  
Annika Schneider ◽  
Chunkyu Ko ◽  
Percy A. Knolle ◽  
Katja Steiger ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Hepatitis ◽  
Hepatitis B ◽  
Chronic Hepatitis B ◽  
Cd8 T Cells ◽  
Recombinant Adenovirus ◽  
Hbv Infection ◽  
High Dose ◽  
Viral Immunity

Immunity against hepatitis B virus (HBV) infection is complex and not entirely understood so far, including the decisive factors leading to the development of chronic hepatitis B. This lack of a mechanistic understanding of HBV-specific immunity is also caused by a limited number of suitable animal models. Here, we describe the generation of a recombinant adenovirus expressing an HBV 1.3-overlength genome linked to luciferase (Ad-HBV-Luc) allowing for precise analysis of the quantity of infected hepatocytes. This enables sensitive and close-meshed monitoring of HBV-specific CD8 T cells and the onset of anti-viral immunity in mice. A high dose of Ad-HBV-Luc developed into chronic hepatitis B accompanied by dysfunctional CD8 T cells characterized by high expression of PD1 and TOX and low expression of KLRG1 and GzmB. In contrast, a low dose of Ad-HBV-Luc infection resulted in acute hepatitis with CD8 T cell-mediated elimination of HBV-replicating hepatocytes associated with elevated sALT levels and increased numbers of cytotoxic HBV-specific CD8 T cells. Thus, the infectious dose was a critical factor to induce either acute self-limited or chronic HBV infection in mice. Taken together, the new Ad-HBV-Luc vector will allow for highly sensitive and time-resolved analysis of HBV-specific immune responses during acute and chronic infection.

scholarly journals Unraveling the Multifaceted Nature of CD8 T Cell Exhaustion Provides the Molecular Basis for Therapeutic T Cell Reconstitution in Chronic Hepatitis B and C

Cells ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2563
Author(s):  
Valeria Barili ◽  
Andrea Vecchi ◽  
Marzia Rossi ◽  
Ilaria Montali ◽  
Camilla Tiezzi ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Hepatitis ◽  
T Cell ◽  
Hepatitis B ◽  
Chronic Hepatitis B ◽  
Cd8 T Cells ◽  
Stress Responses ◽  
T Cell Exhaustion ◽  
Virus Infections ◽  
Cell Exhaustion

In chronic hepatitis B and C virus infections persistently elevated antigen levels drive CD8+ T cells toward a peculiar differentiation state known as T cell exhaustion, which poses crucial constraints to antiviral immunity. Available evidence indicates that T cell exhaustion is associated with a series of metabolic and signaling deregulations and with a very peculiar epigenetic status which all together lead to reduced effector functions. A clear mechanistic network explaining how intracellular metabolic derangements, transcriptional and signaling alterations so far described are interconnected in a comprehensive and unified view of the T cell exhaustion differentiation profile is still lacking. Addressing this issue is of key importance for the development of innovative strategies to boost host immunity in order to achieve viral clearance. This review will discuss the current knowledge in HBV and HCV infections, addressing how innate immunity, metabolic derangements, extensive stress responses and altered epigenetic programs may be targeted to restore functionality and responsiveness of virus-specific CD8 T cells in the context of chronic virus infections.

TIM-3 as a marker of exhaustion in CD8+ T cells of active chronic hepatitis B patients

2019 ◽  
Vol 128 ◽  
pp. 323-328 ◽  
Author(s):  
Hiva Mohammadizad ◽  
Mehdi Shahbazi ◽  
Mohammad Reza Hasanjani Roushan ◽  
Mehdi Soltanzadeh-Yamchi ◽  
Mousa Mohammadnia-Afrouzi
Keyword(s):  
T Cells ◽  
Chronic Hepatitis ◽  
Hepatitis B ◽  
Chronic Hepatitis B ◽  
Cd8 T Cells ◽  
Active Chronic Hepatitis
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