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Related Concept Videos

Primary Lymphoid Organs01:16

Primary Lymphoid Organs

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Primary lymphoid organs are pivotal in the formation, development, and maturation of lymphocytes, the white blood cells that serve as the backbone of our immune system. This crucial function underscores their fundamental role in maintaining our overall health and immunity. The two primary lymphoid organs of prime importance are the red bone marrow and the thymus.
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Functions of Thyroid Hormones01:18

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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
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The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
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T Cell Types and Functions01:24

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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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Hybridoma Technology01:31

Hybridoma Technology

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Hybridoma technology is used for the large-scale production of monoclonal antibodies. Monoclonal antibodies bind to only a single antigenic determinant or epitope. Such antibodies are used in research, diagnostics, and disease therapy. The hybridoma technology established in 1975 by Georges Köhler and Cesar Milstein was awarded the Nobel Prize in Medicine in 1984 for revolutionizing research and therapy.
Hybridoma Selection
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Functions of the Lymphatic and Immune System01:28

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The lymphatic system plays a crucial role in bolstering our immune system. It consists of a network of lymphoid organs, lymph, and lymphatic vessels that provide structural and functional support in safeguarding the body against pathogens such as viruses and bacteria.
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Updated: Sep 6, 2025

Author Spotlight: Advancing Thymic Epithelial Cells and T-Cell Research with Human Thymic Organoids
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Thymus Functionality Needs More Than a Few TECs.

Pratibha Bhalla1, Dong-Ming Su2, Nicolai S C van Oers1,3,4

  • 1Department of Immunology, The University of Texas Southwestern Medical Center, Dallas, TX, United States.

Frontiers in Immunology
|June 27, 2022
PubMed
Summary
This summary is machine-generated.

The thymus produces T cells but declines with age and stress. This review explores diverse stromal cells in the thymus microenvironment to aid in restoring T cell immunity.

Keywords:
FOXN1T cell developmentendothelial cellsmesenchymal cellsthymusthymus epithelial cellsthymus organoid technologiesthymus regeneration

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Area of Science:

  • Immunology
  • Developmental Biology
  • Cell Biology

Background:

  • The thymus is a primary lymphoid organ crucial for T cell production.
  • Thymopoiesis, or T cell development, can be impaired by stress and aging.
  • Thymic involution involves microenvironmental changes like fibrosis and adipogenesis.

Purpose of the Study:

  • To review the diverse stromal cell types within the thymus microenvironment.
  • To understand their roles in thymus development, function, and pathology.
  • To inform strategies for restoring thymic function, including organoid technologies.

Main Methods:

  • Literature review of thymus development and stromal cell contributions.
  • Analysis of single-cell RNA sequencing data in various models.
  • Examination of cellular changes during aging and immune disorders.

Main Results:

  • The thymus microenvironment comprises more than just thymic epithelial cells (TECs).
  • Neural crest-derived mesenchymal cells, endothelial cells, adipocytes, and fibroblasts significantly influence thymic function.
  • Distinct cell types impact thymus formation, expansion, and contraction under normal and pathological conditions.

Conclusions:

  • A comprehensive understanding of thymic stromal cells is essential for addressing immune deficiencies.
  • Restoring thymus functionality may involve targeting these stromal components.
  • Thymus organoid technologies offer a promising avenue for therapeutic intervention.