Liver-infiltrating lymphocytes in chronic human hepatitis C virus infection display an exhausted phenotype with high levels of PD-1 and low levels of CD127 …

H Radziewicz, CC Ibegbu, ML Fernandez… - Journal of …, 2007 - Am Soc Microbiol
The majority of people infected with hepatitis C virus (HCV) fail to generate or maintain a T-
cell response effective for viral clearance. Evidence from murine chronic viral infections …

Upregulation of PD-1 Expression on Circulating and Intrahepatic Hepatitis C Virus-Specific CD8+ T Cells Associated with Reversible Immune Dysfunction

L Golden-Mason, B Palmer, J Klarquist… - Journal of …, 2007 - Am Soc Microbiol
Infection with hepatitis C virus (HCV) is associated with persistence in the majority of
individuals. We demonstrate here that the inhibitory molecule programmed death-1 (PD-1) is …

PD-1 expression in acute hepatitis C virus (HCV) infection is associated with HCV-specific CD8 exhaustion

S Urbani, B Amadei, D Tola, M Massari… - Journal of …, 2006 - Am Soc Microbiol
Hepatitis C virus (HCV)-specific CD8 cell exhaustion may represent a mechanism of HCV
persistence. The inhibitory receptor PD-1 has been reported to be up-regulated in …

High Level of PD-1 Expression on Hepatitis C Virus (HCV)-Specific CD8+ and CD4+ T Cells during Acute HCV Infection, Irrespective of Clinical Outcome

V Kasprowicz, J Schulze zur Wiesch, T Kuntzen… - Journal of …, 2008 - Am Soc Microbiol
We monitored expression of PD-1 (a mediator of T-cell exhaustion and viral persistence) on
hepatitis C virus (HCV)-specific CD8+ and CD4+ T cells from blood and liver during acute …

Functional restoration of HCV-specific CD8 T cells by PD-1 blockade is defined by PD-1 expression and compartmentalization

N Nakamoto, DE Kaplan, J Coleclough, Y Li, ME Valiga… - Gastroenterology, 2008 - Elsevier
BACKGROUND & AIMS: The immunoinhibitory receptor programmed death 1 (PD-1) is up-
regulated on dysfunctional virus-specific CD8 T cells during chronic viral infections, and …

Restoration of HCV-specific T cell functions by PD-1/PD-L1 blockade in HCV infection: effect of viremia levels and antiviral treatment

S Urbani, B Amadei, D Tola, G Pedrazzi, L Sacchelli… - Journal of …, 2008 - Elsevier
BACKGROUND/AIMS: HCV-specific T cells in acute hepatitis C with subsequent chronic
evolution are dysfunctional and most of them express PD-1. The aim of the study was to …

High-programmed death-1 levels on hepatitis C virus-specific T cells during acute infection are associated with viral persistence and require preservation of cognate …

A Rutebemberwa, SC Ray, J Astemborski… - The Journal of …, 2008 - journals.aai.org
Hepatitis C virus (HCV) is an important human pathogen that represents a model for chronic
infection given that the majority of infected individuals fail to clear the infection despite …

Liver-derived hepatitis C virus (HCV)-specific CD4+ T cells recognize multiple HCV epitopes and produce interferon gamma

CA Schirren, MC Jung, JT Gerlach, T Worzfeld… - Hepatology, 2000 - Elsevier
Abstract Virus-specific CD4+ T-cell response at the site of inflammation is believed to play a
decisive role for the course of viral disease. In hepatitis C virus (HCV) infection, the majority …

Immunotherapy of chronic hepatitis C virus infection with antibodies against programmed cell death-1 (PD-1)

MJ Fuller, B Callendret, B Zhu… - Proceedings of the …, 2013 - National Acad Sciences
Hepatitis C virus (HCV) persistence is facilitated by exhaustion of CD8+ T cells that express
the inhibitory receptor programmed cell death 1 (PD-1). Blockade of PD-1 signaling …

T cell dysfunction by hepatitis C virus core protein involves PD-1/PDL-1 signaling

ZQ Yao, E King, D Prayther, D Yin, J Moorman - Viral immunology, 2007 - liebertpub.com
Reports have shown that a negative T cell costimulatory pathway mediated by PD-1
(programmed death-1) and PDL-1 (programmed death ligand-1) is associated with T cell …