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Updated: May 12, 2026
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Generation of Human Chimeric Antigen Receptor Regulatory T Cells
Published on: January 3, 2025
CD39 + Activated Tregs in Cutaneous Squamous Cell Carcinoma: Insights From a Mendelian Randomization and Flow
Chao Lian1,2, Hanghang Zhou1, Ruina Jin3
1Department of Plastic Surgery, The Second Hospital and Clinical Medical School, Lanzhou University, Lanzhou, Gansu, China.
The Journal of Craniofacial Surgery
|May 11, 2026
Summary
Regulatory T cells expressing CD39 are linked to increased cutaneous squamous cell carcinoma risk. This immunosuppressive cell subset correlates with advanced tumor stage, suggesting it as a potential immunotherapy target.
Area of Science:
- Immunology
- Oncology
- Dermatology
Background:
- Cutaneous squamous cell carcinoma (cSCC) is a prevalent skin cancer influenced by the tumor immune microenvironment.
- Regulatory T cells (Tregs) are crucial for immune homeostasis but can promote cancer progression by suppressing anti-tumor immunity.
- The specific role of distinct Treg subsets in cSCC pathogenesis is not well understood.
Purpose of the Study:
- To investigate the role of CD39-expressing regulatory T cells (CD39+ Tregs) in the development and progression of cutaneous squamous cell carcinoma.
- To determine if CD39+ Tregs represent a distinct, clinically relevant immunosuppressive subset in cSCC.
Main Methods:
- Analysis of peripheral blood samples from cSCC patients and healthy controls using flow cytometry.
- Integration of genome-wide association study (GWAS) data with Mendelian randomization (MR) analyses to infer causal relationships.
- Validation in an independent patient cohort to correlate CD39+ Treg frequency with tumor stage and disease progression.
Main Results:
- Patients with cSCC exhibited a higher frequency of activated Tregs compared to healthy controls.
- MR analyses revealed a causal link between genetically predicted CD39+ Tregs and cSCC risk.
- The proportion of CD39+ cells within the activated Treg population was associated with higher tumor stage and disease progression in a validation cohort.
Conclusions:
- CD39-expressing regulatory T cells represent a specific immunosuppressive Treg subset implicated in cutaneous squamous cell carcinoma.
- These findings highlight CD39+ Tregs as a potential biomarker for disease severity and a selective target for future immunotherapeutic strategies in cSCC.
