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T Cell Types and Functions

T Cell Types and Functions

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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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.
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An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
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Immune Response Against Viral Pathogens

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
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Cytotoxic T Cells-mediated Immune Response

Cytotoxic T Cells-mediated Immune Response

Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...

Regulation of Hematopoietic Stem Cells

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All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...

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Regulatory T cells: Therapeutic Potential for Treating Transplant Rejection and Type I Diabetes

Regulatory T cells: Therapeutic Potential for Treating Transplant Rejection and Type I Diabetes

Published on: August 20, 2007

Regulatory T cells: a review.

Alakananda Dasgupta¹, Renu Saxena

¹Department of Haematology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India. alakanandadasgupta@gmail.com

The National Medical Journal of India

|September 4, 2013

Summary

Regulatory T cells (Tregs) are crucial for immune balance and preventing autoimmunity. Understanding Treg biology is key for developing new immunotherapies for diseases like cancer and autoimmune disorders.

Area of Science:

Immunology
Cell Biology
Immunotherapy

Background:

Regulatory T cells (Tregs) are essential for maintaining immune system homeostasis and peripheral immune tolerance.
CD4+ T cells include naturally occurring (nTreg) and inducible (iTreg) subsets, with nTregs being CD4+CD25+ cells that suppress immune responses.
Imbalances in Treg number or function are linked to autoimmunity, tumor development, and other diseases.

Purpose of the Study:

To provide a framework for understanding the biology of regulatory T cells (Tregs).
To explore the therapeutic potential of Tregs in various medical conditions.
To integrate basic and translational research on Tregs.

Main Methods:

Review of recent findings in murine models and human studies.

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Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells

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Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells

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Analysis of Treg function in immune response modulation.

Exploration of Treg manipulation strategies for therapeutic applications.

Main Results:

Tregs play a critical role in regulating immune responses and preventing autoimmunity.
Dysfunctional Tregs are implicated in autoimmune diseases, cancer, and transplant rejection.
Tregs are promising targets for novel immunotherapeutic strategies.

Conclusions:

Understanding Treg biology is vital for developing effective immunotherapies.
Manipulating Tregs offers potential treatments for cancer, autoimmune diseases, and graft-versus-host disease.
Further research in Tregs holds significant promise for clinical applications.