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Related Concept Videos

Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal01:22

Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal

Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
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Delayed-Type Hypersensitivity (DTH), or Type IV hypersensitivity, is a cell-mediated immune response. It occurs when T cells, rather than antibodies, mediate a reaction to specific antigens. It is characterized by a delayed onset (1-2 days) and involves the recruitment of macrophages to the inflammation site.The initiation of a DTH response begins with the sensitization of T cells. During this phase, which lasts at least 1-2 weeks, antigen-specific T cells are activated, clonally expanded, and...
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In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
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Related Experiment Video

Updated: May 29, 2026

Preparation of Single-Cell Suspension of Mouse Thymic Epithelial Cells and Staining of Intracellular Molecules for Flow Cytometric Analysis
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Eph/Ephrin-mediated interactions in the thymus.

Juan Jose Muñoz1, Teresa Cejalvo, Luis Miguel Alonso-Colmenar

  • 1Cytometry and Fluorescence Microscopy Center, Faculty of Biology, Complutense University, Madrid, Spain.

Neuroimmunomodulation
|September 29, 2011
PubMed
Summary
This summary is machine-generated.

Eph and ephrin signaling is crucial for T cell development and thymic epithelial cell organization in the thymus. Disruptions in these pathways significantly alter thymocyte maturation and the thymic epithelial network structure.

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Area of Science:

  • Immunology
  • Developmental Biology
  • Cell Biology

Background:

  • Eph/ephrins are key receptor/ligand families regulating organogenesis and tissue homeostasis.
  • These molecules are widely expressed in the thymus, influencing immune cell development.
  • Their role in thymic epithelial cell (TEC) organization and T cell differentiation is under investigation.

Purpose of the Study:

  • To review the significance of Eph/ephrin signaling in thymic processes.
  • To elucidate the role of Eph/ephrins in T cell differentiation and TEC development.
  • To understand the impact of Eph/ephrin signaling on thymocyte-TEC interactions.

Main Methods:

  • Literature review of existing studies on Eph/ephrin function in the thymus.
  • Analysis of data concerning T cell differentiation and TEC development.
  • Examination of the effects of Eph/ephrin pathway disruption on thymic architecture.

Main Results:

  • Eph/ephrins are involved in lymphoid progenitor cell colonization and migration within the thymus.
  • EphB2 and EphB3 receptors play cell-autonomous roles in specific T cell developmental transitions.
  • Absence of Eph/ephrin B ligands causes significant defects in TEC maturation and epithelial network arrangement.

Conclusions:

  • Eph/ephrin signaling is essential for proper T cell differentiation and thymic structure.
  • These molecules mediate critical interactions between thymocytes and TECs.
  • Dysregulation of Eph/ephrin pathways leads to profound alterations in thymic function and organization.