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Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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B Cell Activation and Differentiation01:24

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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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Cells of the Adaptive Immune Response01:23

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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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Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

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The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
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Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

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Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
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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.
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Related Experiment Video

Updated: Jan 8, 2026

Isolation of CD4+ T-cells and Analysis of Circulating T-follicular Helper cTfh Cell Subsets from Peripheral Blood Using 6-color Flow Cytometry
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B-cell and T-cell function in systemic lupus erythematosus

C S Via1, B S Handwerger

  • 1Division of Rheumatology and Clinical Immunology, University of Maryland School of Medicine, Baltimore, 21201.

Current Opinion in Rheumatology
|September 1, 1993
PubMed
Summary

Systemic lupus erythematosus involves antigen-driven responses and polyclonal B-cell activation. Autoantibody production is not dependent on CD5+ B cells but is promoted by T helper type 2 cytokines like interleukin-4 and interleukin-6.

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Area of Science:

  • Immunology
  • Rheumatology

Background:

  • Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by autoantibody production.
  • The precise mechanisms driving autoantibody formation in SLE are complex and multifactorial.

Purpose of the Study:

  • To elucidate the key cellular and molecular players involved in autoantibody production in SLE.
  • To investigate the role of specific B-cell subsets and cytokine signaling in SLE pathogenesis.

Main Methods:

  • Analysis of B-cell activation pathways in SLE patients.
  • Assessment of the contribution of CD5+ B cells to autoantibody production.
  • Evaluation of the impact of T helper type 2 cytokines on B-cell hyperactivity.

Main Results:

  • Autoantibody production in SLE involves both antigen-driven responses and polyclonal B-cell activation.
  • The CD5+ B cell subset is not critically required for autoantibody production.
  • T helper type 2 cytokines, including interleukin-4 and interleukin-6, significantly promote B-cell hyperactivity and autoantibody formation.

Conclusions:

  • Autoantibody production in SLE is a complex process influenced by multiple immune mechanisms.
  • Targeting T helper type 2 cytokine pathways may offer therapeutic strategies for SLE.
  • Further research into B-cell activation and regulation is crucial for understanding SLE.