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Tumor Immunotherapy

Tumor Immunotherapy

Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.

Cell-surface Signaling

Cell-surface Signaling

Hormones—or any molecule that binds to a receptor, known as a ligand—that are lipid-insoluble (water-soluble) are not able to diffuse across the cell membrane. In order to be able to affect a cell without entering it, these hormones bind to receptors on the cell membrane. When a first messenger, a hormone, binds to a receptor, a signal cascade is set off, causing second messengers, proteins inside the cell, to become activated, resulting in downstream effects.

The Tumor Microenvironment

The Tumor Microenvironment

Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...

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Mannose: A game-changer for T cell immunotherapy.

Jingwei Ma¹, Shuai Tong¹, Jingxuan Xiao¹

¹Department of Immunology, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, China.

Cell Metabolism

|January 18, 2025

Summary

Mannose metabolism is key for maintaining stemness in tumor precursor exhausted T cells (Tpex). This finding reveals how metabolic strategies can enhance T cell manufacturing for cancer therapy.

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Area of Science:

Immunology
Metabolic pathways
Cancer research

Background:

Immune cell function is significantly impacted by cellular metabolism.
Exhausted T cells (Tpex) are critical in tumor immunity but often lose function.
Understanding Tpex metabolism is vital for improving cancer immunotherapies.

Purpose of the Study:

To investigate the metabolic characteristics of tumor precursor exhausted T cells (Tpex).
To identify specific metabolic pathways crucial for Tpex stemness and function.
To explore the potential of metabolic modulation in enhancing T cell manufacturing.

Main Methods:

Analysis of metabolic profiles in Tpex.
Functional assays to assess Tpex stemness and differentiation.
Genetic and pharmacological manipulation of metabolic pathways.

Main Results:

Mannose metabolism was identified as a key metabolic feature of Tpex.
Mannose metabolism is essential for maintaining the stemness of Tpex.
This metabolic pathway decouples T cell proliferation from differentiation.

Conclusions:

Mannose metabolism plays a critical role in preserving T cell stemness in the tumor microenvironment.
Targeting mannose metabolism offers a novel strategy for generating more effective T cells for immunotherapy.
Metabolic reprogramming holds promise for improving the efficacy of adoptive T cell therapies.