Lithium Compounds Redirect Lactic Acid in Tumor-Fighting CD8+ T Cells
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Solution Overview
Problem
Current anti-tumor therapies, including immunotherapy, are hindered by the immunosuppressive effects of lactic acid in the tumor microenvironment, which inhibit the activation and function of CD8+ T cells, leading to reduced efficacy.
Innovation Solution
Utilization of lithium-containing compounds, such as lithium carbonate, to promote the oxidative metabolism of lactic acid in CD8+ T cells by shunting it to mitochondria, thereby enhancing their anti-tumor function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lactic acid accumulates in the tumor microenvironment, then tumor cells can survive and proliferate under aerobic conditions, but lactic acid inhibits the activation and function of anti-tumor CD8+ T cells
Solution Approach 1:
The patent converts the harmful immunosuppressive effect of lactic acid on CD8+ T cells into a beneficial effect by using lithium-containing compounds to redirect lactic acid metabolism in T cells toward oxidative phosphorylation in mitochondria. This transforms lactic acid from an immunosuppressive metabolite into an energy source that enhances T cell anti-tumor function, while tumor cells continue to use glycolysis for survival.
2Productivity
If traditional chemotherapy and radiotherapy are used to treat tumors, then tumor cells can be killed, but severe side effects and damage to normal body tissues occur
Solution Approach 1:
The patent applies local quality by targeting metabolic differences between tumor cells and immune cells. Tumor cells maintain glycolytic metabolism while activated CD8+ T cells use oxidative phosphorylation. The lithium-containing compounds specifically enhance lactic acid oxidation in T cell mitochondria, creating a localized metabolic modulation that boosts anti-tumor immunity without affecting tumor cells directly or causing systemic side effects.
3Object-affected harmful factors
If immunotherapy is used to treat tumors, then targeting and toxicity are improved, but only a minority of patients benefit due to immunosuppressive effects in the tumor microenvironment
Solution Approach 1:
The patent changes the metabolic parameter of CD8+ T cells by modulating their lactic acid handling. Lithium-containing compounds alter the metabolic fate of lactic acid in T cells, shifting it from an immunosuppressive signal to an oxidative fuel source. This parameter change in T cell metabolism overcomes the immunosuppressive microenvironment and expands the patient population that benefits from immunotherapy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Lithium-containing compounds enhance the utilization of lactic acid by CD8+ T cells, increasing their number and activity in the tumor microenvironment, leading to improved tumor infiltration, reduced tumor growth, and prolonged survival in mouse models.
Implementation Method 1
promote the oxidative metabolism of lactic acid in CD8+ T cells by shunting it to mitochondria
Data Source
AI summary
Disclosed is the use of a lithium-containing compound in the treatment of a tumor. Specifically. the present invention relates to use of a lithium-containing compound in preparing a medicament for treating a tumor.