T Memory Stem Cell Expansion With GSK-3beta Inhibition
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Solution Overview
Problem
Existing methods for obtaining antigen-specific T cells from peripheral blood for adoptive cell therapy in cancer treatment face challenges such as insufficient tumor-specific reactivity and persistence in patients.
Innovation Solution
A method involving the isolation and expansion of T memory stem cells (TSCM) using glycogen synthase kinase-3beta (GSK-3beta) inhibitors, non-specific T cell stimuli, and cytokines, followed by sorting using flow cytometry to achieve a phenotype of CD95+, CD45RO−, CCR7+, and other markers, enhances the production of TSCM cells with improved self-renewal and multipotency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If T cells are isolated from peripheral blood for adoptive cell therapy, then the therapy can be administered to patients, but the T cells may not exhibit sufficient tumor-specific reactivity or persist in the peripheral blood upon reinfusion
Solution Approach 1:
The patent applies preliminary action by pre-activating and expanding naive T cells in vitro using specific culture conditions (IL-7, IL-15, anti-CD3/CD28 beads) before adoptive transfer, thereby preparing them with enhanced tumor-specific reactivity and persistence capabilities ahead of time. This pre-preparation allows the T cells to be primed and expanded to sufficient numbers before reinfusion, resolving the contradiction between obtaining sufficient functional T cells and the difficulty of manufacture.
Solution Approach 2:
The patent employs parameter changes by modifying the culture conditions with specific cytokine combinations (IL-7 and IL-15) and stimulation protocols (anti-CD3/CD28 beads) to transform naive T cells into a population with enhanced functional properties. These parameter changes in the culture environment enable the T cells to acquire improved tumor-specific reactivity and persistence without requiring more complex manufacturing processes.
2Productivity
If naive T cells are activated and expanded using conventional methods, then the numbers of T cells increase, but the tumor-specific reactivity and persistence may be insufficient
Solution Approach 1:
The patent applies parameter changes by using specific cytokine combinations (IL-7 and IL-15) and stimulation protocols (anti-CD3/CD28 beads) during T cell expansion. These parameter modifications in the culture conditions enable simultaneous achievement of high cell numbers and enhanced functional properties including tumor-specific reactivity and persistence, resolving the contradiction between productivity and reliability.
Solution Approach 2:
The patent uses cytokines (IL-7, IL-15) and antibody-coated beads (anti-CD3/CD28) as intermediaries to mediate the activation and expansion of T cells. These intermediaries transmit the necessary signals to promote both proliferation and functional maturation, enabling the T cells to achieve both high numbers and improved tumor-specific reactivity simultaneously.
3Adaptability or versatility
If T memory stem cells are produced with enhanced self-renewal and multipotency, then they can repopulate differentiated effector lymphocytes, but more complex culture conditions including GSK-3beta inhibitors are required
Solution Approach 1:
The patent applies parameter changes by adding GSK-3beta inhibitors to the culture conditions, which modifies the signaling pathways to promote maintenance of stem cell properties. This parameter change enables the T cells to acquire enhanced self-renewal and multipotency capabilities, allowing them to repopulate differentiated effector lymphocytes in vivo.
Solution Approach 2:
The patent uses GSK-3beta inhibitors as intermediaries to modulate the Wnt signaling pathway, which in turn promotes the maintenance of T memory stem cell properties. This intermediary substance enables the complex biological function of enhancing self-renewal and multipotency through a specific molecular mechanism.
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
The produced TSCM cells exhibit enhanced self-renewal and multipotency, enabling effective repopulation of differentiated effector lymphocytes and rapid acquisition of effector functions in response to antigenic stimuli, thereby improving the efficacy of adoptive cell therapy.
Implementation Method 1
sorting the lymphocytes using flow cytometry into a population comprising a phenotype comprising (i) CD95+, CD45RO−, and CCR7+; and (ii) CD62L+ or one or more of CD27+, CD28+, CD45RA+, and CD127+ to produce an isolated T memory stem cell population
Data Source
AI summary
Provided are methods of producing an isolated T memory stem cell population, the method comprising a) isolating naïve T cells from a mammal, wherein the mammal is not a mouse; b) activating the naïve T cells and expanding the numbers of naïve T cells in the presence of one or more non-specific T cell stimuli, one or more cytokines, and a GSK-3beta inhibitor. Also provided are methods of producing an isolated T memory stem cell population, the method comprising a) isolating lymphocytes from a mammal; b) sorting the lymphocytes using flow cytometry into a population comprising a phenotype comprising i) CD95+, CD45RO−, and CCR7+; and ii) CD62L+ or one or more of CD27+, CD28+, CD45RA+, and CD127+ to produce an isolated T memory stem cell population. Further embodiments of the invention provide related cells, populations of cells, pharmaceutical compositions, and methods of treating or preventing cancer.