Related Experiment Video
Updated: Jun 16, 2025
09:10
Generation of Lymph Node-fat Pad Chimeras for the Study of Lymph Node Stromal Cell Origin
Published on: December 16, 2013
6.0K
Dynamic regulation of innate lymphoid cell development during ontogeny
Tao Wu1, Sijie Chen2, Xinyi Zhu1
1School of Medicine, Institute for Immunology, Tsinghua University, Beijing 100084, China; Tsinghua-Peking Center for Life Science, Beijing, China.
Mucosal Immunology
|August 19, 2024
Summary
Innate lymphoid cells (ILCs) shift from LTi cell dominance in fetuses to non-LTi ILC dominance after birth. This transition is regulated by Notch signaling pathway activation, crucial for immune system development.
Area of Science:
- Immunology
- Developmental Biology
- Cell Biology
Background:
- Innate lymphoid cells (ILCs) are critical immune cells with diverse subsets (ILC1, ILC2, ILC3, LTi cells) responding to different pathogens.
- Lymphoid tissue inducer (LTi) cells are vital for lymphoid organogenesis in fetal development and their proportion declines postnatally.
- The regulatory mechanisms governing the shift from fetal LTi cell-dominant to adult non-LTi ILC-dominant populations remain largely unknown.
Purpose of the Study:
- To investigate the regulatory mechanisms controlling the developmental transition of ILC subsets from fetal to postnatal stages.
- To elucidate the role of signaling pathways and transcription factors in ILC progenitor differentiation.
- To understand how the immune system adapts ILC populations to meet changing demands during development.
Main Methods:
- Comparative analysis of ILC progenitor differentiation potential between fetal and postnatal mouse models.
- Investigation of signaling pathway activation, including the Notch signaling pathway, in ILC progenitors.
- Assessment of key transcription factor expression, such as Gata3 and Rorc, during ILC development.
Main Results:
- Fetal ILC progenitors show a preference for differentiating into LTi cells, while postnatal progenitors favor non-LTi ILCs.
- A significant shift in differentiation occurs within the first week after birth in mice.
- Adult ILC progenitors exhibit heightened Notch signaling pathway activation, increased Gata3, and decreased Rorc expression compared to fetal progenitors.
Conclusions:
- The developmental shift in ILC populations is driven by differential activation of the Notch signaling pathway.
- Modulation of Notch signaling, Gata3, and Rorc expression underlies the transition from fetal LTi cell-dominant to adult non-LTi ILC-dominant states.
- The body strategically regulates ILC development via signaling pathways to adapt immune responses to different life stages.
Related Concept Videos
01:23Cells of the Adaptive Immune Response
972
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...
972
01:24B Cell Activation and Differentiation
1.7K
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
1.7K
01:21Lineage Commitment
3.0K
Commitment is the process whereby stem cells:
3.0K
01:01Regulation of Hematopoietic Stem Cells
3.2K
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...
3.2K
01:24T Cell Types and Functions
964
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...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
964
01:22T Cell Activation and Clonal Selection
693
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...
Naive T cells that have not yet encountered an antigen express two primary CD...
693