Background: The aim of the present study was to determine erythrocyte glutathione, superoxide dismutase, catalase, glutathione peroxidase, and serum total antioxidant response levels in a large chronic viral hepatitis group who had no antiviral treatment, and also the relationship of these parameters with viral load, fibrosis score, and necro-inflammation of the liver.
Methods: 200 patients who were diagnosed with chronic viral hepatitis and 107 healthy subjects were included in this study. Antioxidant parameters were measured spectrophotometrically. The viral load was assayed using a polymerase chain reaction technique. Histopathologic findings in the liver were scored as necro-inflammatory activity and fibrosis according to Ishak-Knodell score.
Results: Erythrocyte superoxide dismutase, catalase, glutathione peroxidase activities, glutathione, and serum total antioxidant response levels were significantly lower in patients than in controls (p < 0,001). Additionally, no significant correlation was found between these markers and viral load, necro-inflammation, and fibrosis of the liver in patients with chronic viral hepatitis.
Conclusions: Our data suggest the insufficiency of an antioxidant barrier in patients with chronic viral hepatitis, but the decrease in antioxidant systems was not correlated with viral load, necro-inflammatory activity, and fibrosis score in the liver.
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Comb Chem High Throughput Screen
January 2025
Department of Emergency, First Medical Center of Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China.
Background: The prevalence of depression in COVID-19 patients is notably high, disrupting daily life routines and compounding the burden of other chronic health conditions. In addition, to elucidate the connection between COVID-19 and depression, we conducted an analysis of commonly differentially expressed genes [co-DEGs], uncovering potential biomarkers and therapeutic avenues specific to COVID-19-related depression.
Methods: We obtained gene expression profiles from the Gene Expression Omnibus [GEO] database with strategic keyword searches ["COVID-19", "depression," and "SARS"].
Nat Immunol
January 2025
Department of Medicine, Department of Pathology, Department of Microbiology & Immunology, McGill University Health Centre, McGill International TB Centre, Meakins Christie Laboratories, McGill University, Montréal, Québec, Canada.
Disease tolerance is an evolutionarily conserved host defense strategy that preserves tissue integrity and physiology without affecting pathogen load. Unlike host resistance, the mechanisms underlying disease tolerance remain poorly understood. In the present study, we investigated whether an adjuvant (β-glucan) can reprogram innate immunity to provide protection against influenza A virus (IAV) infection.
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January 2025
Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA.
This study examines the origin and differentiation of stem-like CD8+ T cells that are essential for sustained T cell immunity in chronic viral infections and cancer and also play a key role in PD-1 directed immunotherapy. These PD-1+ TCF-1+ TOX+ stem-like CD8+ T cells, also referred to as precursors of exhausted T cells, have a distinct program that allows them to adapt to chronic antigen stimulation. Using the mouse model of chronic LCMV infection we found that virus specific stem-like CD8+ T cells are generated early (day 5) during chronic infection suggesting that this crucial fate commitment occurs irrespective of infection outcome.
View Article and Find Full Text PDFMol Oncol
January 2025
Division of Foundational Sciences, Mike Petryk School of Dentistry, University of Alberta, Edmonton, Canada.
CD8 T cells, a subset of T cells identified by the surface glycoprotein CD8, particularly those expressing the co-stimulatory molecule CD226, play a crucial role in the immune response to malignancies. However, their role in chronic lymphocytic leukemia (CLL), an immunosuppressive disease, has not yet been explored. We studied 64 CLL patients and 25 age- and sex-matched healthy controls (HCs).
View Article and Find Full Text PDFPNAS Nexus
January 2025
The Program for Experimental & Theoretical Modeling, Division of Hepatology, Department of Medicine, Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153, USA.
Global elimination of chronic hepatitis C (CHC) remains difficult without an effective vaccine. Since injection drug use is the leading cause of hepatitis C virus (HCV) transmission in Western Europe and North America, people who inject drugs (PWID) are an important population for testing HCV vaccine effectiveness in randomized-clinical trials (RCTs). However, RCTs in PWID are inherently challenging.
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