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Updated: Dec 14, 2025
Analysis of Human T Cell Activity in an Allogeneic Co-Culture Setting of Pre-Treated Tumor Cells
Published on: March 7, 2025
Tumors induce de novo steroid biosynthesis in T cells to evade immunity
Bidesh Mahata1,2, Jhuma Pramanik3, Louise van der Weyden3
1Department of Pathology, University of Cambridge, Cambridge, CB2 1QP, UK. bm562@cam.ac.uk.
Abstract:
Tumors subvert immune cell function to evade immune responses, yet the complex mechanisms driving immune evasion remain poorly understood. Here we show that tumors induce de novo steroidogenesis in T lymphocytes to evade anti-tumor immunity. Using a transgenic steroidogenesis-reporter mouse line we identify and characterize de novo steroidogenic immune cells, defining the global gene expression identity of these steroid-producing immune cells and gene regulatory networks by using single-cell transcriptomics. Genetic ablation of T cell steroidogenesis restricts primary tumor growth and metastatic dissemination in mouse models. Steroidogenic T cells dysregulate anti-tumor immunity, and inhibition of the steroidogenesis pathway is sufficient to restore anti-tumor immunity. This study demonstrates T cell de novo steroidogenesis as a mechanism of anti-tumor immunosuppression and a potential druggable target.
Insights
Tumors create new steroid production in T cells to avoid immune attack. Blocking this steroidogenesis pathway restores anti-tumor immunity, revealing a new target for cancer therapies.
Area of Science:
- Immunology
- Cancer Biology
- Endocrinology
Background:
- Tumors evade immune responses by altering immune cell function.
- Mechanisms of tumor-induced immune evasion are complex and not fully understood.
Purpose of the Study:
- To investigate the role of de novo steroidogenesis in T lymphocytes as a mechanism for tumor immune evasion.
- To identify and characterize steroidogenic T cells and their regulatory networks.
Main Methods:
- Utilized a transgenic steroidogenesis-reporter mouse model.
- Employed single-cell transcriptomics to define gene expression and regulatory networks.
- Assessed the impact of genetic ablation of T cell steroidogenesis on tumor growth and metastasis.
Main Results:
- Demonstrated that tumors induce de novo steroidogenesis in T lymphocytes.
- Identified and characterized de novo steroidogenic immune cells.
- Showed that genetic ablation of T cell steroidogenesis restricts tumor growth and metastasis.
- Confirmed that inhibition of steroidogenesis restores anti-tumor immunity.
Conclusions:
- T cell de novo steroidogenesis is a novel mechanism of anti-tumor immunosuppression.
- Targeting the steroidogenesis pathway in T cells represents a potential therapeutic strategy for cancer treatment.
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