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Updated: Sep 13, 2025

Isolation of Group 2 Innate Lymphoid Cells from Mouse Nasal Mucosa to Detect the Expression of CD226
Published on: May 10, 2022
The Immune Regulatory Functions of CD226 and Its Implications in Immune-Mediated Diseases
Keyan Liu1, Yuanzhen Liu2, Huabao Xiong2
1Department of Public Health, Jining Medical University, Jining 272067, China.
Insights
CD226 regulates immune cell function and is implicated in various diseases. Understanding CD226
Area of Science:
- Immunology
- Molecular Biology
- Cellular Biology
Background:
- CD226, an immunoglobulin superfamily member, is a key regulator of immune responses.
- Predominantly expressed on natural killer (NK) cells and T cells, CD226 interacts with ligands CD155 and CD112.
- This interaction influences T cell differentiation, effector functions, and NK cell activation and cytotoxicity.
Purpose of the Study:
- To review the current understanding of CD226's role in immune responses.
- To outline CD226's involvement in various immunological diseases.
- To provide insights for future research on CD226's role in disease pathogenesis.
Main Methods:
- Literature review of existing research on CD226.
- Analysis of genetic polymorphisms and expression patterns of CD226.
- Synthesis of data on CD226's function in immune cells and disease contexts.
Main Results:
- CD226 plays a critical role in modulating T cell and NK cell functions.
- Dysregulated CD226 expression and genetic variations are linked to autoimmune, infectious, allergic diseases, and cancer.
- CD226 is identified as a promising therapeutic target for immune-mediated diseases.
Conclusions:
- CD226 is a crucial molecule in immune regulation with significant implications in disease.
- Further research into CD226 mechanisms can advance therapeutic strategies for immune-mediated conditions.
- This review consolidates current knowledge on CD226's multifaceted roles in immunity and disease.
Abstract:
CD226, a member of the immunoglobulin superfamily, serves as a critical regulator in various immunological processes. CD226 is expressed across immune and non-immune cells, with predominant expression being observed in natural killer (NK) cells and T cells. By engaging ligands CD155 and CD112, it orchestrates diverse signaling pathways that modulate T cell differentiation and effector functions while enhancing NK cell activation and cytotoxicity. Genetic polymorphisms and the dysregulated expression of CD226 are closely associated with susceptibility to autoimmune diseases, infectious diseases, allergic diseases, and cancer progression. Growing evidence highlight CD226's emerging promise as a therapeutic target for immune-mediated diseases. The present work aims to review the current understanding of CD226's role in immune responses and to comprehensively outline its multifaceted involvement in different immunological diseases, providing insights for future research to advance our mechanistic understanding of its roles in disease pathogenesis.
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