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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: Jan 1, 2026

A Strategy for the Study of IL-9-Producing Lymphoid Cells in the Nippostrongylus brasiliensis Infection Model

A Strategy for the Study of IL-9-Producing Lymphoid Cells in the Nippostrongylus brasiliensis Infection Model

Published on: March 3, 2023

[The study on the interleukin-8 (IL-8)].

Wensheng Zhang¹, Huaiqing Chen

¹Institute of Biomedical Engineering, West China Medical Center, Sichuan University, Chengdu 610041.

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi = Journal of Biomedical Engineering = Shengwu Yixue Gongchengxue Zazhi

|February 4, 2003

Summary

This summary is machine-generated.

Interleukin-8 (IL-8) is a key chemokine in inflammation, activating neutrophils and other cells. Its gene expression is tightly regulated by transcription factors, influencing inflammatory diseases and atherosclerosis.

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Area of Science:

Immunology and Molecular Biology: Focus on chemokine signaling and gene regulation.

Context:

Interleukin-8 (IL-8) is a C-X-C chemokine crucial for neutrophil activation and chemoattraction.
IL-8 is implicated in various inflammatory diseases and rapidly produced by diverse cell types.

Purpose:

To detail the structure and regulation of the human IL-8 gene.
To describe the IL-8 receptor (IL-8R) and its role in cellular responses.

Summary:

The human IL-8 gene, located on chromosome 4q12-q21, comprises four exons and is regulated transcriptionally.
Key transcription factors like AP-1, NF-kappa B, and NF-IL-6 interact to control IL-8 promoter activity.
IL-8 exerts its functions via specific receptors (CXCR1, CXCR2) on various cells, influencing neutrophil adhesion and migration.

Impact:

Understanding IL-8 regulation provides insights into inflammatory disease pathogenesis.
IL-8's role in neutrophil behavior is critical for immune responses and potentially atherosclerosis development.