T-cell responses against chronic lymphocytic leukemia cells: implications for immunotherapy.
نویسندگان
چکیده
Chronic lymphocytic leukemia (CLL) cells are ineffective antigen-presenting cells (APCs) although CD40-activated CLL cells can stimulate proliferation of autologous and allogeneic T cells. We examined the antigen-presenting capacity of CD40-activated CLL cells as well as dendritic cells pulsed with apoptotic bodies of CLL cells to generate autologous and allogeneic immune responses against CLL cells. Both APC types were capable of generating T-cell lines that proliferate specifically in response to unstimulated CLL cells. Whereas cytotoxic responses against stimulated and unstimulated CLL cells could be repeatedly generated by allogeneic healthy donors, autologous cytotoxic immune responses against CD40-activated and native CLL cells were rarely detected. However, T cells isolated from patients with CLL could recognize and lyse allogeneic stimulated and unstimulated CLL cells, demonstrating that cytotoxic T cells from these tumor-bearing patients are functionally intact.
منابع مشابه
CD4+ T Cells are Exhausted and Show Functional Defects in Chronic Lymphocytic Leukemia
Background: Chronic lymphocytic leukemia (CLL) is the most common adult leukemia in the western world. This health problem is caused due to the accumulation of mature B-lymphocytes in the peripheral blood and bone marrow. In the course of cancer, CD4+ T cells become “exhausted” and characterized with poor effector functions and the expression of multiple inhibitory receptors. Objective: To inve...
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 کاملGPI-Anchored Fibromodulin as a Novel Target in Chronic Lymphocytic Leukemia: Diagnostic and Therapeutic Implications
Background: We have previously reported the aberrant expression of Fibromodulin (FMOD) in patients with chronic lymphocytic leukemia (CLL). Although FMOD has been considered as a cytoplasmic or secretory protein, we discovered the cell surface expression of FMOD in leukemic B cells via anchoring with glycosylphosphatidylinositol (GPI). Objective: To evaluate FM...
متن کاملChronic lymphocytic leukemia, biology, new diagnosis and treatment: review article
Chronic lymphocytic leukemia (CLL) is a malignancy of B CD5+cells and is the most common type of leukemia in adults. The disease is more common in men over 50 years in western countries. CLL is associated with defective apoptosis in B cells. CLL was traditionally regarded as a disease that occurs before naïve B cells meet the antigen in the lymph nodes. Laboratory diagnosis requires white blood...
متن کاملAnalysis of HLA-G Gene Expression in B-Lymphocytes from Chronic Lymphocytic Leukemia Patients
The human leukocyte antigen G (HLA-G) molecule exhibits limited tissue distribution, low polymorphism and alternative splicings that generate seven HLA-G isoforms. HLA-G exerts multiple immunoregulatory functions. Recent studies indicate an ectopic up-regulation in tumor cells that may favor their escape from anti-tumor immune responses. This study it is an effort to clarify the presence of HLA...
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:
- Blood
دوره 100 1 شماره
صفحات -
تاریخ انتشار 2002