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Related Concept Videos

T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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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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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 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.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
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Development of Immunocompetence01:22

Development of Immunocompetence

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
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The Mammary Glands01:12

The Mammary Glands

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The female breast is a hemispheric projection of variable size positioned anterior to the pectoralis major and serratus anterior muscles. A fascia layer composed of dense, irregular connective tissue connects it to these muscles.
Each breast features a pigmented projection known as the nipple, through which milk emerges via closely spaced openings of ducts, referred to as lactiferous ducts. Surrounding the nipple is a circular pigmented area of skin named the areola, which appears rough due to...
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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.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
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Indirect Immunofluorescence on Frozen Sections of Mouse Mammary Gland
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Got milk? how T cells shape lactation and beyond.

Abigail Jaquish1, Deepshika Ramanan2

  • 1NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA 92037, USA; Biological Sciences Graduate Program, University of California, La Jolla, San Diego, CA 92092, USA.

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Summary

Lactation involves immune cells, particularly T cells, which are crucial for mammary gland development and function. Understanding these immune dynamics is key for maternal health during and after nursing.

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Area of Science:

  • Immunology
  • Reproductive Biology
  • Cellular Biology

Background:

  • Lactation is a complex physiological process influenced by the immune system.
  • Immune cells play vital roles in mammary gland development, tissue remodeling, and milk production.
  • The long-term impact of immune cell activity during lactation on maternal health is gaining recognition.

Purpose of the Study:

  • To review recent advancements in understanding T cell roles during lactation.
  • To explore the dynamics of T cells within the mammary gland throughout the lactation cycle and post-lactation.
  • To highlight the significance of T cells in immune-regulated lactation and maternal health.

Main Methods:

  • Literature review of recent studies on mammary gland immunology during lactation.
  • Analysis of T cell populations and their functions in the mammary gland.
  • Synthesis of data on T cell dynamics during lactation and involution.

Main Results:

  • T cells are integral to mammary gland development and tissue remodeling during lactation.
  • Immune cell activity, specifically T cells, influences milk production and composition.
  • These immune processes have lasting effects on the mother's health post-lactation.

Conclusions:

  • T cells are critical regulators of the immune-modulated process of lactation.
  • Understanding T cell dynamics in the mammary gland is essential for optimizing maternal health outcomes.
  • Further research into mammary gland immunity during lactation promises significant insights.