TNF-α, Not CD154 (CD40L), Plays a Major Role in SEB-Dependent, CD4+T Cell-Induced Endothelial Cell Activationin Vitro

1998 ◽  
Vol 190 (1) ◽  
pp. 12-22 ◽  
Author(s):  
David Baum ◽  
Renat Yaron ◽  
Michael J. Yellin
Keyword(s):  
Endothelial Cell ◽  
T Cell ◽  
Cd4 T Cell ◽  
Tnf Α

The Effect of Antiretroviral Therapy on IL-6, IL-1β, TNF-α, IFN-γ Levels and their Relationship with HIV-RNA and CD4+ T Cells in HIV Patients

2020 ◽  
Vol 18 (5) ◽  
pp. 354-361
Author(s):  
Gülay Okay ◽  
Meliha Meric Koc ◽  
Eray Metin Guler ◽  
Ayşegül Yabaci ◽  
Abdürrahim Kocyigit ◽  
...  
Keyword(s):  
T Cell ◽  
Hiv Infection ◽  
Cell Count ◽  
Cd4 T Cell ◽  
Positive Correlation ◽  
Hiv Rna ◽  
Tnf Α ◽  
Cytokine Levels ◽  
Ifn Γ ◽  
Cd4 T Cell Count

Background: Serum cytokine levels over the course of HIV infection usually increase with immunosuppression and decrease after antiretroviral treatment (ART). Objectives: The aim of the study is to compare cytokine levels between HIV-infected patients (HIP) and controls and investigate the relationship between CD4+T cell count, HIV-RNA levels, and cytokine levels. Methods: The study subjects comprised ART-naive HIP (n=30) with no comorbidities and age-and sex-matched healthy controls. We measured levels of IL-6, IL-1β, TNF-α, and IFN-γ in serum samples of HIP at the beginning and at month 6 of ART and in controls. Results: The mean age of the study subjects was 38.7 ±10.3 years, with men making up 86.7% of the study subjects (n=26). IL-6, IL-1β, and TNF-α levels were significantly higher in both ART-naive (p<0.001, p=0.002, p=0.001) and ART-experienced HIP (p<0.001) than controls. The IFN-γ level was lower in both ART-naive and ART-experienced HIP compared to controls (p=0.082 and p=0.002). There was a positive correlation between the CD4+T cell count and serum concentration of IFN- γ(r=0.320, p<0.05). While the serum IFN-γ concentration showed a negative correlation with the HIVRNA level(r=-0.412, p<0.001), the serum IL-1β, IL-6, and TNF-α concentrations showed a positive correlation with the HIV-RNA level (r=0.349, p<0.001; r:0.54, p<0.001; r:0.438, p<0.00). Conclusions: Although serum concentrations of IL-6, IL-1β and TNF-α showed a significant decrease after ART, they were still significantly higher than the controls. IFN-γ responded differently to ART compared to the other cytokines, indicating that it may play a distinct and important role in the pathogenesis of HIV infection.

scholarly journals Discordance in CD4+T-Cell Levels and Viral Loads with Co-Occurrence of Elevated Peripheral TNF-α and IL-4 in Newly Diagnosed HIV-TB Co-Infected Cases

PLoS ONE ◽  
2013 ◽  
Vol 8 (8) ◽  
pp. e70250 ◽  
Author(s):  
Ronald Benjamin ◽  
Atoshi Banerjee ◽  
Sharada Ramaseri Sunder ◽  
Sumanlatha Gaddam ◽  
Vijaya Lakshmi Valluri ◽  
...  
Keyword(s):  
T Cell ◽  
Cd4 T Cell ◽  
Newly Diagnosed ◽  
Viral Loads ◽  
Tnf Α

scholarly journals The Role of β-Catenin in Th1 Immune Response against Tuberculosis and Profiles of Expression in Patients with Pulmonary Tuberculosis

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Kunlong Xiong ◽  
Jinxia Niu ◽  
Ruijuan Zheng ◽  
Zhonghua Liu ◽  
Yanzheng Song ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Cd8 T Cells ◽  
Cd4 T Cells ◽  
Mononuclear Cells ◽  
Cd4 T Cell ◽  
Cell Frequency ◽  
Tnf Α ◽  
Ifn Γ

β-Catenin is a key molecule of canonical Wnt/β-catenin pathway. Its roles and expression profiles in T cells of tuberculosis (TB) remain unclear. The aim of this study was to explore the role of β-catenin in CD4+ T cells and its expression characteristics in patients with pulmonary tuberculosis (PTB). In this study, CD4+ T cell-specific β-catenin conditional knockout mice (β-CAT-cKO mice) were aerosol infected with Mycobacteria tuberculosis (Mtb) H37RV with wild-type mice as controls. Four weeks after infection, the mRNA expression of IFN-γ, TNF-α, and TCF-7 in the lungs of mice was measured. CD4, CD8, β-catenin, IFN-γ, and TNF-α in mononuclear cells from the lungs and spleens were measured by flow cytometry, and the pathological changes of lungs were also observed. Patients with PTB were enrolled, with blood samples collected and PBMCs isolated. The expressions of β-catenin, IFN-γ, TNF-α, and PD-1 in CD4+ and CD8+ T cells were measured by flow cytometry. Results showed a decreased frequency of and reduced IFN-γ/TNF-α mRNA expression and secretion by CD4+ T cells in the lungs of infected β-CAT-cKO mice compared with infected wild-type controls, and only slightly more inflammatory changes were observed in the lungs. β-catenin expressions in CD4+ and CD8+ T cells were significantly decreased in blood cells of patients with severe PTB compared with those in mild PTB. The stimulation of peripheral blood mononuclear cells (PBMCs) with lithium chloride (LiCl), a stimulant of β-catenin, resulted in the increase in CD4+ T cell frequency, as well as their secretion of IFN-γ and TNF-α. β-Catenin demonstrated a moderately positive correlation with PD-1 in CD4+ T cells. β-Catenin along with PD-1 and IFN-γ in CD4+ T cells had a high correlation with those in CD8+ T cells. In conclusion, β-catenin may be involved in the regulation of Th1 response and CD4+ T cell frequency in TB.

scholarly journals Multiple Myeloma Cell-Derived Interleukin-32gamma Increases the Immunosuppressive Function of Macrophages By Promoting Indoleamine 2,3-Dioxygenase (IDO) Expression

Blood ◽  
2018 ◽  
Vol 132 (Supplement 1) ◽  
pp. 3179-3179
Author(s):  
Haimeng Yan ◽  
Donghua He ◽  
Xi Huang ◽  
Zhang En Fan ◽  
He Huang ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Bone Marrow ◽  
Cell Proliferation ◽  
T Cell ◽  
Rna Sequencing ◽  
Cd4 T Cell ◽  
T Cell Proliferation ◽  
Indoleamine 2,3 Dioxygenase ◽  
Tnf Α ◽  
Ifn Γ

Abstract Background: The interaction of multiple myeloma (MM) cells with macrophages (MΦs) in the bone marrow microenvironment contributes to the pathophysiology of MM. In addition to promoting angiogenesis through vasculogenic mimicry, MM-associated MΦs (mMΦs) protect MM cells from spontaneous and chemotherapy-induced apoptosis. mMΦs therefore represent a potential target for myeloma treatment and it is essential to explore the mechanisms underlying normal MΦ polarization to mMΦs. We previously showed that IL-32 is overexpressed in MM patients and is mainly derived from MM cells. The present study was designed to explore the clinical significance of IL-32 in MM and to further elucidate the molecular mechanisms underlying the IL-32-mediated immune function of MΦs. Methods: We examined the expression of IL-32 in bone marrow biopsy samples using immunohistochemistry. Quantitative real-time PCR, western blot analysis and immunofluorescence were applied to measure the expression of IL-32, IDO and proteinase 3 (PR3). We obtained the global transcriptional profile of the IL-32γ-treated MΦs by RNA sequencing (RNA-Seq). Immunoprecipitation (IP) and GST pulldown experiments was applied to confirm the binding affinity of PR3 for IL-32. We created IL-32-knockdown MM cells by transfection of IL-32 shRNA and silenced PR3 expression in MΦs using siRNA targeting PR3. CD4+ T cell proliferation and IL-2, IFN-γ and TNF-α production were measured by flow cytometry. Results: We found that high IL-32 expression in MM patients was associated with advanced clinical stage and high serum β2-microglobulin levels. Several isoforms of IL-32 were detected in MM cells and IL-32γ was the most active subtype. RNA sequencing revealed that IL-32γ significantly induced the production of the immunosuppressive molecule indoleamine 2,3-dioxygenase (IDO) in MΦs and this effect was verified at the protein level. Furthermore, IL-32-knockdown MM cells showed less ability than control MM cells to promote IDO expression. As a binding protein for IL-32, PR3 was universally expressed on the surface of MΦs and knockdown of PR3 or inhibition of the STAT3 and nuclear factor κB (NF-κB) pathways hindered the IL-32γ-mediated stimulation of IDO expression. Finally, IDO-positive IL-32γ-educated MΦs inhibited CD4+ T cell proliferation and IL-2, IFN-γ and TNF-α production in response to activation. Conclusion: Our study showed that MM cell-derived IL-32γ induced IDO production in MΦs through PR3 and the downstream STAT3 and NF-κB pathways, resulting in the suppression of the proliferation and effector function of CD4+ T cells. High IL-32 expression in MM may contribute to an immunosuppressive microenvironment by upregulating IDO production in MΦs and promote MM progression. Disclosures No relevant conflicts of interest to declare.

scholarly journals CD4+ T cell lymphopenia and dysfunction in severe COVID-19 disease is autocrine TNF-α/TNFRI-dependent

2021 ◽  
Author(s):  
Iulia Popescu ◽  
Mark E. Snyder ◽  
Carlo J. Iasella ◽  
Stefanie J. Hannan ◽  
Ritchie Koshy ◽  
...  
Keyword(s):  
T Cell ◽  
Severe Disease ◽  
T Cell Responses ◽  
Cd4 T Cell ◽  
Infliximab Treatment ◽  
Mild Disease ◽  
Cell Responses ◽  
Activation Induced Cell Death ◽  
Tnf Α

Lymphopenia is common in severe COVID-19 disease, yet the mechanisms are poorly understood. In 148 patients with severe COVID-19, we found lymphopenia was associated with worse survival. CD4+ lymphopenia predominated, with lower CD4+/CD8+ ratios in severe COVID-19 compared to recovered, mild disease (p<0.0001). In severe disease, immunodominant CD4+ T cell responses to Spike-1(S1) produced increased in vitro TNF-α, but impaired proliferation and increased susceptibility to activation-induced cell death (AICD). CD4+TNF-α+ T cell responses inversely correlated with absolute CD4+ counts from severe COVID-19 patients (n=76; R=-0.744, P<0.0001). TNF-α blockade including infliximab or anti-TNFRI antibodies strikingly rescued S1-specific CD4+ proliferation and abrogated S1-AICD in severe COVID-19 patients (P<0.001). Single-cell RNAseq demonstrated downregulation of Type-1 cytokines and NFκB signaling in S1-stimulated CD4+ cells with infliximab treatment. Lung CD4+ T cells in severe COVID-19 were reduced and produced higher TNF-α versus PBMC. Together, our findings show COVID-19-associated CD4+ lymphopenia and dysfunction is autocrine TNF-α/TNFRI-dependent and therapies targeting TNF-α may be beneficial in severe COVID-19.

scholarly journals Dominant TNF-α+ Mycobacterium tuberculosis–specific CD4+ T cell responses discriminate between latent infection and active disease

2011 ◽  
Vol 17 (3) ◽  
pp. 372-376 ◽  
Author(s):  
Alexandre Harari ◽  
Virginie Rozot ◽  
Felicitas Bellutti Enders ◽  
Matthieu Perreau ◽  
Jesica Mazza Stalder ◽  
...  
Keyword(s):  
Mycobacterium Tuberculosis ◽  
T Cell ◽  
Latent Infection ◽  
T Cell Responses ◽  
Cd4 T Cell ◽  
Cell Responses ◽  
Tnf Α ◽  
Active Disease

scholarly journals Association of -308 TNF-alpha promoter polymorphism with viral load and CD4 T-helper cell apoptosis in HIV-1 infected black South Africans

2012 ◽  
Vol 13 (2) ◽  
Author(s):  
Shivona Gounden ◽  
Devapregasan Moodley ◽  
Anil Chuturgoon ◽  
Leshern Karamchand ◽  
Halima Dawood
Keyword(s):  
Viral Load ◽  
T Cell ◽  
Cell Apoptosis ◽  
Promoter Polymorphism ◽  
Cd4 T Cell ◽  
Cell Counts ◽  
Hiv Progression ◽  
Increased Risk ◽  
Tnf Α ◽  
Hiv 1

Objective. To determine whether the -308 TNF-α promoter polymorphism is associated with markers of HIV progression in the South African population. Methods. Polymerase chain reaction-restriction fragment length polymorphism was used to detect the -308 TNF-α polymorphism in 75 patients and 76 healthy controls. Serum TNF-α concentrations were measured using ELISA in each cohort. CD4+ T cell apoptosis and HIV-1 RNA viral load were determined using Annexin-V-FITC assay and Nuclisens Easy Q HIV-1 assay respectively. CD4 + T cell counts were measured flow cytometrically. Results. The frequency of -308 G allele was similar in the HIV-1 and control cohorts. The -308GG genotype was associated with lower TNF-α concentrations and markers of increased HIV progression indicated by higher TH lymphocyte apoptosis, lower TH lymphocyte count and higher plasma viral load, irrespective of treatment. Conclusion. The presence of the TNF-α -308 G allele in HIV-1 patients may be associated with increased risk of HIV-1 progression. Further research is required to investigate the nature of this association. S Afr J HIV Med 2012;13(2):72-77.

scholarly journals Association between serum sST2 levels and CD4+T cells in patients with organ failure: a pilot study

2021 ◽  
Author(s):  
qisong Peng ◽  
guoyou Shi ◽  
hongxiang lu
Keyword(s):  
T Cells ◽  
T Cell ◽  
Organ Failure ◽  
Normal Control ◽  
Cd4 T Cells ◽  
Cd4 T Cell ◽  
Inflammatory Factors ◽  
Enzyme Linked Immunosorbent Assay ◽  
Tnf Α ◽  
Normal Controls

Background: The importance of sST2 has been increasingly appreciated because of its associated with the development of heart failure and related diseases. Objective: The aim of this study was to evaluate the association of sST2 with CD4+T cells in patients with organ failure. Methods: 100 (M:F=60:40) organ failure patients aged (mean±SD=69.08±16.68) and 30 (M:F=14:16) normal control aged (mean±SD=60.23±13.99) serum sST2 were detected by chemiluminescence assay (CLIA) and the expression of serum IL-1, IL-6 and TNF-α were analyzed by enzyme-linked immunosorbent assay (ELISA). The proportion of CD4+T cells in peripheral blood was determined by flow cytometry (FCM). Association of sST2 with CD4+T cells in organ failure patents were analyzed by SPASS. Results: The expression of sST2 in organ failure patients (107.4±5.79ng/mL) was significantly higher than normal control (8.57±0.35ng/mL). Inflammatory factors IL-1 and IL-6 in patients were also increased than normal controls (IL-1: 0.33±0.04pg/mL vs 0.14±0.02pg/mL. IL-6: 165.7±10.53pg/mL vs 95.33±7.42pg/mL. TNF-α: 1.57±0.14pg/mL vs 6.11±0.77pg/mL). In patients, the results showed CD4+T cells were reduced compare with normal control (238.3±13.67/μL vs 1081±39.13/μL). Additionally, sST2 was found to be inversely associated with CD4+T cell in patients with organ failure. Conclusion: sST2 level was closely related to the development of organ failure and sST2 was obviously correlated with CD4+T cell in patients with organ failure.

Sign in / Sign up

Export Citation Format

Share Document