Pluripotent Stem-Derived Treg Expansion with IL-4/TGF-β

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Solution Overview

Problem

Existing methods struggle to efficiently produce regulatory T cells with high proliferation while maintaining their suppressive function, particularly from pluripotent stem cells.

Innovation Solution

Culturing CD4+ T cells derived from pluripotent stem cells in the presence of IL-4 and a TGF-βR agonist, optionally with additional cytokines such as IL-3, IL-33, IL-2, a TNFR2 agonist, and mTOR inhibitors, to enhance regulatory T cell proliferation and maintain suppressive function.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If regulatory T cells are cultured to increase proliferation, then the production efficiency is improved, but the suppressive function may be lost

Engineering Contradiction:

Improveproduction efficiency of regulatory T cellsVSAvoidsuppressive function of regulatory T cells

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The invention changes the chemical parameters of the culture medium by specifically adding IL-4 and TGF-β (and optionally IL-3) to create optimal conditions that simultaneously support both Treg proliferation and FOXP3 expression maintenance, resolving the contradiction between productivity and reliability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses FOXP3 expression as an intermediary marker to monitor and ensure the maintenance of suppressive function during proliferation. By targeting FOXP3 maintenance through specific cytokine combinations, the invention ensures that suppressive function is preserved while production efficiency increases

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If FOXP3 expression is maintained in primary Tregs, then suppressive function is preserved, but proliferation efficiency is reduced

Engineering Contradiction:

Improvesuppressive function maintenanceVSAvoidproliferation efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The invention changes the cytokine parameter composition in the culture medium by adding IL-4 alongside TGF-β and optionally IL-3, creating a synergistic environment that enables both FOXP3 maintenance and high proliferation efficiency, overcoming the traditional trade-off

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If pluripotent stem cells are used to produce regulatory T cells, then supply stability is improved, but differentiation efficiency is low

Engineering Contradiction:

Improvesupply stability of regulatory T cellsVSAvoiddifferentiation efficiency

Core Design Contradiction:

Stability of the object's compositionVSProductivity

Solution Approach 1:

The invention optimizes the culture medium parameters with specific combinations of IL-4, TGF-β, and optionally IL-3 to enhance the differentiation efficiency of pluripotent stem cells into Tregs, while maintaining supply stability through standardized culture conditions

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4600352A1T cell production method

Publication Date: 2025.08.13 TAKEDA PHARMA CO LTD

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AI summary

Disclosed are a method for producing a cell population in which regulatory T cells have proliferated, including (1) culturing a cell population containing CD4+ T cells derived from pluripotent stem cells in the presence of IL-4 and a TGF-βR agonist, a cell population containing regulatory T cells obtained according to the method, and a medicine containing the cell population containing regulatory T cells.