Complement opsonization enhances friend virus infection of B cells and thereby amplifies the virus-specific CD8+ T cell response.
نویسندگان
چکیده
B cells are one of the targets of Friend virus (FV) infection, a well-established mouse model often used to study retroviral infections in vivo. Although B cells may be effective in stimulating cytotoxic T lymphocyte responses, studies involving their role in FV infection have mainly focused on neutralizing antibody production. Here we show that polyclonal activation of B cells promotes their infection with FV both in vitro and in vivo. Furthermore, we demonstrate that complement opsonization of Friend murine leukemia virus (F-MuLV) enhances infection of B cells, which correlates with increased potency of B cells to activate FV-specific CD8(+) T cells.
منابع مشابه
Kinetics of Primary and Memory Cytotoxic T Lymphocyte Responses to Herpes Simplex Virus 1 Infection: Granzyme B Mediated CTL Activity
Background: Herpes simplex virus type 1 is one of the most common viruses among human population. Studies demonstrate the essential role of cell mediated immunity, especially CD8+ T cells, in prevention and clearance of HSV1. Objective: It is of great importance to improve our knowledge about the kinetics of CTL responses to primary and secondary HSV-1 infection. Methods: Using a sensitive tech...
متن کاملComplement as an Endogenous Adjuvant for Dendritic Cell-Mediated Induction of Retrovirus-Specific CTLs
Previous studies have demonstrated the involvement of complement (C) in induction of efficient CTL responses against different viral infections, but the exact role of complement in this process has not been determined. We now show that C opsonization of retroviral particles enhances the ability of dendritic cells (DCs) to induce CTL responses both in vitro and in vivo. DCs exposed to C-opsonize...
متن کاملسطح بالای پاسخ ایمنی اختصاصی لنفوسیتهای CD4+وCD8+ نسبت به سیتومگالوویروس و همبستگی بین آنها در بیماران مبتلا به لوسمی لنفوسیتی مزمن سلولB
High level of CMV-specific CD4+ and CD8+cells Immune Response and Correlation Between them in B-cell Chronic Lymphocytic Leukemia Patients B. Pourgheysri [1] , P. Moss [2] Received: 10/09/07 Sent for Revision: 05/03/08 Received Revised Manuscript: 06/12/08 Accepted: 30/12/08 Background and Objective: Chronic lymphocytic leukemia (CLL) is characterized by a monoclonal proliferation o...
متن کاملP 130: The Role of Host T- Cell Lymphocyte in Immunopathogenesis of HTLV-I-Associated Myelopathy/Tropical Spastic Paraparesis
Human T-cell lymphotropic virus type 1 (HTLV-1) is associated with adult T-cell leukemia/lymphoma (ATL) and HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). Only a limited percentage of infected individuals develop disease in response to the virus while the majority remain asymptomatic and HAM/TSP is the most common clinical manifestation of the virus. HAM/TSP is an inflamma...
متن کاملTissue-specific abundance of regulatory T cells correlates with CD8+ T cell dysfunction and chronic retrovirus loads.
Infection of mice with Friend virus induces the activation of CD4(+) regulatory T cells (Tregs) that suppress virus-specific CD8(+) T cells. This suppression leads to incomplete virus clearance and the establishment of virus persistence. We now show that Treg-mediated suppression of CD8(+) T cells is tissue specific, occurring in the spleen but not the liver. Regardless of infection status, the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of virology
دوره 85 2 شماره
صفحات -
تاریخ انتشار 2011