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T Cell Types and Functions

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...

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Related Experiment Video

Updated: May 2, 2026

Characterization of Human Monocyte-derived Dendritic Cells by Imaging Flow Cytometry: A Comparison between Two Monocyte Isolation Protocols

Characterization of Human Monocyte-derived Dendritic Cells by Imaging Flow Cytometry: A Comparison between Two Monocyte Isolation Protocols

Published on: October 18, 2016

[Polymorphonuclear leukocytes decrease the immunostimulatry capacity of human dendritic cells].

Paulo Maffia¹, Sandra Zittermann, María Lucila Scimone

¹Laboratorio de Inmunogenética, Hospital de Clínicas José de San Martín y Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Argentina.

|November 25, 2004

Summary

This summary is machine-generated.

Polymorphonuclear leukocytes (PMNL) can suppress T cell proliferation and IFN-gamma production by dendritic cells (DCs). This PMNL modulation of DCs is mediated by serine proteases and is less effective on mature DCs.

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Area of Science:

Immunology
Cell Biology

Context:

Dendritic cells (DCs) are crucial antigen-presenting cells that initiate immune responses.
Polymorphonuclear leukocytes (PMNL) are key innate immune cells involved in inflammation and host defense.

Purpose:

To investigate the modulatory effect of PMNL on the function of human dendritic cells (DCs).
To determine the mechanisms underlying PMNL-induced modulation of DC function.

Summary:

PMNL significantly reduced the allostimulatory capacity of DCs, leading to decreased T cell proliferation and lower IFN-gamma production.
This suppressive effect was observed in both allogeneic and antigen-specific assays.
The inhibitory effect of PMNL on DCs was partially reversed by serine protease inhibitors, suggesting a role for these enzymes.

Impact:

These findings reveal a novel mechanism by which PMNL can influence adaptive immune responses by modulating DC function.
Understanding this interaction is crucial for developing immunotherapies and managing inflammatory conditions.