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Full-Text Articles in Medicine and Health Sciences
Human Type 2 Myeloid Dendritic Cells Produce Interferon-Lambda And Amplify Interferon-Alpha In Response To Hepatitis C Virus Infection, Shuye Zhang, Karen Kodys, Kui Li, Gyongyi Szabo
Human Type 2 Myeloid Dendritic Cells Produce Interferon-Lambda And Amplify Interferon-Alpha In Response To Hepatitis C Virus Infection, Shuye Zhang, Karen Kodys, Kui Li, Gyongyi Szabo
Gyongyi Szabo
BACKGROUND and AIMS: The type III interferons (IFN-lambdas: interleukin [IL]-28a, IL-28b, and IL-29) have important roles in hepatitis C virus (HCV) infection, but little is understood about what cells produce these cytokines or how production is activated. We investigated whether human immune cells recognize HCV-infected cells and respond by producing IFN-lambda. METHODS: We cultured healthy human peripheral blood mononuclear cells (PBMCs) with different populations of immune cells and Japanese fulminant hepatitis-1 (JFH-1) HCV-infected Huh7.5 (cell culture-derived HCV particles [HCVcc]/Huh7.5) cells. RESULTS: Human PBMCs recognized HCVcc/Huh7.5 cells and responded by producing IFN-alpha, IFN-gamma, and IFN-lambda. A rare subset of myeloid dendritic …
Dendritic Cells In Hepatitis C Infection: Can They (Help) Win The Battle, Angela Dolganiuc, Gyongyi Szabo
Dendritic Cells In Hepatitis C Infection: Can They (Help) Win The Battle, Angela Dolganiuc, Gyongyi Szabo
Gyongyi Szabo
Infection with hepatitis C virus (HCV) is a public health problem; it establishes a chronic course in ~85% of infected patients and increases their risk for developing liver cirrhosis, hepatocellular carcinoma, and significant extrahepatic manifestations. The mechanisms of HCV persistence remain elusive and are largely related to inefficient clearance of the virus by the host immune system. Dendritic cells (DCs) are the most efficient inducers of immune responses; they are capable of triggering productive immunity and maintaining the state of tolerance to self- and non-self antigens. During the past decade, multiple research groups have focused on DCs, in hopes of …
A Prospective Study Of The Rate Of Progression In Compensated, Histologically Advanced Chronic Hepatitis C, Jules Dienstag, Marc Ghany, Timothy Morgan, Adrian Di Bisceglie, Herbert Bonkovsky, Hae-Young Kim, Leonard Seeff, Gyongyi Szabo, Elizabeth Wright, Richard Sterling, Gregory Everson, Karen Lindsay, William Lee, Anna Lok, Chihiro Morishima, Anne Stoddard, James Everhart
A Prospective Study Of The Rate Of Progression In Compensated, Histologically Advanced Chronic Hepatitis C, Jules Dienstag, Marc Ghany, Timothy Morgan, Adrian Di Bisceglie, Herbert Bonkovsky, Hae-Young Kim, Leonard Seeff, Gyongyi Szabo, Elizabeth Wright, Richard Sterling, Gregory Everson, Karen Lindsay, William Lee, Anna Lok, Chihiro Morishima, Anne Stoddard, James Everhart
Gyongyi Szabo
The incidence of liver disease progression among subjects with histologically advanced but compensated chronic hepatitis C is incomplete. The Hepatitis C Antiviral Long-term Treatment against Cirrhosis Trial was a randomized study of 3.5 years of maintenance peginterferon treatment on liver disease progression among patients who had not cleared virus on peginterferon and ribavirin therapy. Patients were followed subsequently off therapy. Because maintenance peginterferon treatment did not alter liver disease progression, we analyzed treated and control patients together. Among 1,050 subjects (60% advanced fibrosis, 40% cirrhosis), we determined the rate of progression to cirrhosis over 4 years and of clinical outcomes …
Management Of Recurrent Hepatitis C After Liver Transplantation: A Concise Review, Gyongyi Szabo, Eliezer Katz, Herbert Bonkovsky
Management Of Recurrent Hepatitis C After Liver Transplantation: A Concise Review, Gyongyi Szabo, Eliezer Katz, Herbert Bonkovsky
Gyongyi Szabo
Recurrent hepatitis C infection and subsequent graft failure are increasingly recognized problems after orthotopic liver transplantation. Although many prospective therapeutic, controlled trials in primary hepatitis C disease have been reported, large-scale studies are yet to be performed in patients with posttransplant recurrent hepatitis C after liver transplantation. In this review, we summarize the current literature on the therapeutic approaches for recurrent hepatitis C and discuss the results of published studies on therapy with ribavirin or interferon (IFN) alone and on combination therapy with IFN plus ribavirin. Further, we discuss results of prophylactic approaches to the problem of recurrent hepatitis C …
Herbal Product Use By Persons Enrolled In The Hepatitis C Antiviral Long-Term Treatment Against Cirrhosis (Halt-C) Trial, Leonard Seeff, Teresa Curto, Gyongyi Szabo, Gregory Everson, Herbert Bonkovsky, Jules Dienstag, Mitchell Shiffman, Karen Lindsay, Anna Lok, Adrian Di Bisceglie, William Lee, Marc Ghany
Herbal Product Use By Persons Enrolled In The Hepatitis C Antiviral Long-Term Treatment Against Cirrhosis (Halt-C) Trial, Leonard Seeff, Teresa Curto, Gyongyi Szabo, Gregory Everson, Herbert Bonkovsky, Jules Dienstag, Mitchell Shiffman, Karen Lindsay, Anna Lok, Adrian Di Bisceglie, William Lee, Marc Ghany
Gyongyi Szabo
Herbal products, used for centuries in Far Eastern countries, are gaining popularity in western countries. Surveys indicate that persons with chronic hepatitis C (CHC) often use herbals, especially silymarin (milk thistle extract), hoping to improve the modest response to antiviral therapy and reduce side effects. The Hepatitis C Antiviral Long-Term Treatment Against Cirrhosis (HALT-C) Trial, involving persons with advanced CHC, nonresponders to prior antiviral therapy but still willing to participate in long-term pegylated interferon treatment, offered the opportunity to examine the use and potential effects of silymarin. Among 1145 study participants, 56% had never taken herbals, 21% admitted past use, …
The Role Of Plasmacytoid Dendritic Cell-Derived Ifn Alpha In Antiviral Immunity, Gyongyi Szabo, Angela Dolganiuc
The Role Of Plasmacytoid Dendritic Cell-Derived Ifn Alpha In Antiviral Immunity, Gyongyi Szabo, Angela Dolganiuc
Gyongyi Szabo
Viral infections represent a major source of acute and chronic human disease. The immune system plays a central role in the elimination of viruses through its ability to recognize pathogens and to induce virus-specific cellular activation, accompanied by a robust production of soluble molecules with antiviral effects. Interferons are among the most powerful natural soluble antiviral molecules. Upon viral infection, interferons are produced by a variety of cell types, with immune cells being the main contributors. The immune system works as a well-orchestrated team composed of multiple cell types. The mechanisms of intercellular cooperation that includes dendritic cells (DCs), their …