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Related Concept Videos

B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
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Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

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Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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T Cell Activation and Clonal Selection01:22

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T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
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Receptor Downregulation in MVBs01:15

Receptor Downregulation in MVBs

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Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that  lead to cell proliferation, migration, and differentiation. Overexpression of EGFR  stimulates cells to proliferate. Excessive  EGFR...
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Signal Transduction: Overview01:26

Signal Transduction: Overview

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Cells respond to many types of information, often through receptor proteins positioned on the membrane. They respond to chemical signals, such as hormones, neurotransmitters, and other signaling molecules, initiating a series of molecular reactions to produce an appropriate response. This is called signal transduction. Cells also coordinate different responses elicited by the same signaling molecule via mediators, allowing molecular cross-talk.
Typically, signal transduction involves three...
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Related Experiment Video

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Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation
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Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation

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Multilevel BCR signals toward CLL.

Marco Herling1, Elena Vasyutina1

  • 1UNIVERSITY OF COLOGNE.

Blood
|March 7, 2015
PubMed
Summary
This summary is machine-generated.

This study shows how B-cell receptor stimulation, both independent and antigen-mediated, contributes to leukemia development in chronic lymphocytic leukemia (CLL) patients. These findings highlight key mechanisms in cancer progression.

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From a 2DE-Gel Spot to Protein Function: Lesson Learned From HS1 in Chronic Lymphocytic Leukemia
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A Chromatin Immunoprecipitation Assay to Identify Novel NFAT2 Target Genes in Chronic Lymphocytic Leukemia
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Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation
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From a 2DE-Gel Spot to Protein Function: Lesson Learned From HS1 in Chronic Lymphocytic Leukemia
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A Chromatin Immunoprecipitation Assay to Identify Novel NFAT2 Target Genes in Chronic Lymphocytic Leukemia
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A Chromatin Immunoprecipitation Assay to Identify Novel NFAT2 Target Genes in Chronic Lymphocytic Leukemia

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Area of Science:

  • Hematology
  • Oncology
  • Immunology

Background:

  • Chronic lymphocytic leukemia (CLL) is a B-cell malignancy.
  • B-cell receptor (BCR) signaling plays a critical role in CLL pathogenesis.
  • The precise role of different BCR signaling pathways in vivo is not fully understood.

Purpose of the Study:

  • To investigate the in vivo relevance of autonomous and ligand-mediated BCR signaling in CLL.
  • To provide experimental evidence for the proleukemogenic effects of combined BCR stimulation.

Main Methods:

  • Utilized in vivo experimental models to study BCR signaling in CLL.
  • Investigated autonomous (exo-antigen–independent) BCR stimulation.
  • Examined ligand (autoantigen)-mediated BCR signaling.

Main Results:

  • Presented the first in vivo experimental evidence for the proleukemogenic role of BCR signaling in CLL.
  • Demonstrated the significance of autonomous BCR stimulation in conjunction with autoantigen-mediated signaling.
  • Provided insights into the dual mechanisms of BCR activation in leukemia development.

Conclusions:

  • Autonomous and ligand-mediated BCR signaling are both relevant in vivo for CLL pathogenesis.
  • Combined BCR stimulation contributes to the proleukemogenic potential in CLL.
  • These findings advance the understanding of BCR signaling in B-cell malignancies.