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Related Concept Videos

Lineage Commitment01:21

Lineage Commitment

Commitment is the  process whereby stem cells:
T Cell Activation and Clonal Selection01:22

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...
Master Transcription Regulators02:23

Master Transcription Regulators

Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
T Cell Types and Functions01:24

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.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Cells of the Adaptive Immune Response01:23

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...
Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

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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Related Experiment Video

Updated: Jul 14, 2026

Mouse Na&#239;ve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
07:12

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Published on: April 16, 2015

Regulatory factors for initial T lymphocyte lineage specification.

Ellen V Rothenberg1

  • 1Division of Biology, California Institute of Technology, Pasadena, California 91125, USA. evroth@its.caltech.edu

Current Opinion in Hematology
|May 31, 2007
PubMed
Summary

T lymphocyte development relies on a balance of transcription factors like E2A and PU.1, interacting with Notch signaling. This balance is crucial for initiating and maintaining T cell lineage, preventing diversion to other cell types.

Related Experiment Videos

Last Updated: Jul 14, 2026

Mouse Na&#239;ve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
07:12

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets

Published on: April 16, 2015

Area of Science:

  • Immunology
  • Molecular Biology
  • Developmental Biology

Background:

  • T lymphocyte development is a complex process requiring precise regulation.
  • Multiple transcription factors and signaling pathways orchestrate T cell lineage commitment.

Purpose of the Study:

  • To review the roles of key transcription factors (E2A, PU.1, Gfi-1, TCF-1, Runx) in T cell development.
  • To highlight the interplay between these factors and the Notch pathway.

Main Methods:

  • This is a review article, synthesizing existing research.
  • Analysis of gene regulatory networks and factor interactions.

Main Results:

  • E2A and Runx factors establish precursors receptive to Notch-induced T cell programs.
  • Early PU.1 is important, but later PU.1 antagonizes pro-T cell factors.
  • Notch signaling blocks lineage diversion promoted by factors like PU.1, C/EBP, GATA, and TCF.

Conclusions:

  • T cell entry is governed by a dynamic balance of regulatory factors.
  • Notch signaling is essential for initiating the T cell program and ensuring lineage fidelity.