Related Experiment Video
Updated: Jun 5, 2026
Development and Functional Characterization of Murine Tolerogenic Dendritic Cells
Published on: May 18, 2018
Dendritic cell-restricted CD80/86 deficiency results in peripheral regulatory T-cell reduction but is not associated
Liat Bar-On1, Tal Birnberg, Ki-wook Kim
1Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel.
Insights
Classical dendritic cells (cDCs) are crucial for T-cell immunity and Treg maintenance. CD80/CD86 costimulation is key for cDC-Treg interactions, but absence of cDCs triggers myeloproliferative disorders, not autoimmunity.
Area of Science:
- Immunology
- Cell Biology
Background:
- Classical dendritic cells (cDCs) are vital for adaptive immunity, including T-cell responses.
- Emerging evidence suggests cDCs also regulate regulatory T cells (Tregs) in peripheral tissues.
Purpose of the Study:
- To investigate the role of CD80/CD86 costimulation in cDC-Treg interactions.
- To determine the consequences of cDC absence or impaired CD80/86 signaling on immune homeostasis.
Main Methods:
- Utilized mouse models lacking cDCs or with selective CD80/86 deficiency on cDCs.
- Analyzed Treg compartment size, lymphocyte activation, immunoglobulin titers, and T-cell subset dynamics.
Main Results:
- CD80/86 costimulation is essential for cDC-mediated Treg maintenance.
- Absence of cDCs or their CD80/86 ligands did not lead to systemic lymphocyte hyperactivation or autoimmunity.
- Elevated immunoglobulin titers and altered T-cell profiles were linked to a nonmalignant myeloproliferative disorder in cDC-deficient mice.
Conclusions:
- cDC-Treg interactions are critically dependent on CD80/86 costimulation.
- The absence of cDCs, rather than directly causing autoimmunity, precipitates a myeloproliferative disorder with secondary immune alterations.
Abstract:
Classical DC (cDC) are required for efficient protective T-cell immunity. Moreover, recent data indicate that cDC also play a critical role in mediating homeostatic proliferation and maintenance of peripheral Treg. Here, we corroborate these findings by defining CD80/CD86 costimulation as an essential molecular component required for the cDC-Treg interactions. In contrast to earlier reports, the reduced Treg compartment of mice lacking cDC or selective CD80/86 expression on cDC, as such, did not render the respective animals prone to systemic lymphocyte hyperactivation or autoimmunity. Rather, we provide evidence that elevated immunoglobulin titers, as well as changes in T-cell subset prevalence and activation status are strictly associated with the nonmalignant myeloproliferative disorder triggered by the absence of cDC.
More Related Videos
07:17Phenotypic and Functional Analysis of Activated Regulatory T Cells Isolated from Chronic Lymphocytic Choriomeningitis Virus-infected Mice
Published on: June 22, 2016
11:34A Simple and Efficient Method for Testing Immunomodulatory Agents for Generation of Tolerogenic Dendritic Cells from Human CD14+ Monocytes
Published on: April 11, 2025
Related Concept Videos
01:22T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
01:24T Cell Types and Functions
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...