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Related Concept Videos

T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

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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.
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Cytotoxic T Cells-mediated Immune Response01:27

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Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
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T Cell Types and Functions01:24

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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.
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Related Experiment Video

Updated: May 7, 2025

A High-Throughput Luciferase Assay to Evaluate Proteolysis of the Single-Turnover Protease PCSK9
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PCSK9 in T-cell function and the immune response.

Yuying Wang1, Xiaosheng Fang2, Jiarui Liu2

  • 1Shandong Provincial Hospital Affiliated to Shandong First Medical University, Shandong, 250021, China.

Biomarker Research
|December 31, 2024
PubMed
Summary
This summary is machine-generated.

Proprotein convertase subtilisin/kexin type 9 (PCSK9) is linked to familial hypercholesterolemia and cardiovascular risk. Emerging research reveals PCSK9

Keywords:
Immune responsePCSK9PCSK9 inhibitorsSignaling pathwayT cells

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Area of Science:

  • Biochemistry
  • Immunology
  • Cardiovascular Medicine

Background:

  • Proprotein convertase subtilisin/kexin type 9 (PCSK9) was identified in 2003 and is crucial in managing familial hypercholesterolemia.
  • PCSK9 inhibition offers a safe and effective strategy for lowering cardiovascular risk.
  • Recent studies highlight PCSK9's involvement beyond lipid metabolism, including roles in inflammation and immune regulation.

Purpose of the Study:

  • To review current advancements in PCSK9 research.
  • To explore the biological processes and immune functions of PCSK9.
  • To investigate the intricate relationship between PCSK9 and T-cell activation, expansion, and immune response signaling pathways.

Main Methods:

  • Comprehensive literature review of studies on PCSK9.
  • Analysis of biological processes associated with PCSK9.
  • In-depth investigation of PCSK9's interactions with various T-cell types and immune signaling pathways.

Main Results:

  • PCSK9 plays a significant role in regulating T-cell activation and expansion.
  • PCSK9 mediates inflammatory processes and influences other immune cells.
  • Specific signaling pathways link PCSK9 activity to the broader immune response.

Conclusions:

  • PCSK9 is a multifaceted protein with critical roles in both lipid metabolism and immune regulation.
  • Understanding PCSK9's immune functions opens new therapeutic avenues for inflammatory and autoimmune diseases.
  • Further research into PCSK9 signaling pathways is warranted to fully elucidate its immunomodulatory potential.