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Antigen Presenting Cells

Antigen Presenting Cells

The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...

T Cell Activation and Clonal Selection

T Cell Activation and Clonal Selection

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...

Cells of the Adaptive Immune Response

Cells of the Adaptive Immune Response

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...

B Cell Activation and Differentiation

B Cell Activation and Differentiation

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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Related Experiment Video

Updated: Oct 9, 2025

Development and Functional Characterization of Murine Tolerogenic Dendritic Cells

Development and Functional Characterization of Murine Tolerogenic Dendritic Cells

Published on: May 18, 2018

Follicular dendritic cells.

Seham A Abd El-Aleem¹, Entesar Ali Saber^1,2, Neven M Aziz^2,3

¹Department of Histology and Cell Biology, Minia University, Minya, Egypt.

Journal of Cellular Physiology

|December 17, 2021

Summary

This summary is machine-generated.

Follicular dendritic cells (FDCs) are vital immune cells regulating B cell responses and maintaining immune memory. Dysfunctional FDCs can lead to chronic immune disorders and disease persistence.

Keywords:

B cells FDCs dendritic cells immunity sarcoma

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Development and Functional Characterization of Murine Tolerogenic Dendritic Cells

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An Efficient and High Yield Method for Isolation of Mouse Dendritic Cell Subsets

An Efficient and High Yield Method for Isolation of Mouse Dendritic Cell Subsets

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Generation of Human Monocyte-derived Dendritic Cells from Whole Blood

Generation of Human Monocyte-derived Dendritic Cells from Whole Blood

Published on: December 24, 2016

Area of Science:

Immunology
Cell Biology

Background:

Follicular dendritic cells (FDCs) are crucial accessory immune cells.
They organize lymphoid architecture, support B cell maturation, and regulate humoral immunity.
FDCs are essential for immune memory and preventing autoimmune disorders.

Purpose of the Study:

To provide a comprehensive overview of FDC biology.
To elucidate the role of FDCs in both physiological and pathological conditions.
To highlight FDCs' involvement in immune-related disorders and neoplasms.

Main Methods:

This review synthesizes existing research on FDC biology.
It examines FDC functions in immune regulation and disease pathogenesis.
Literature search and analysis of FDC roles in various conditions were performed.

Main Results:

FDCs regulate B cell responses through antigen presentation and signaling.
Persistent antigen trapping by FDCs contributes to chronic immune disorders.
FDCs are implicated in HIV/AIDS, prion diseases, autoimmune disorders, and lymphoid neoplasms.

Conclusions:

Understanding FDC biology is key to controlling humoral immunity.
Targeting FDCs offers potential therapeutic strategies for immune-mediated diseases.
FDC research is a rapidly advancing field with significant clinical implications.