Spatiotemporally Tuned Particles for Staggered Agent Release
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Solution Overview
Problem
Current controlled drug delivery systems lack effective spatiotemporal control over the release of agents, such as drugs and immunomodulatory agents, at specific times and locations within cells, which is crucial for maximizing treatment efficacy.
Innovation Solution
Development of spatiotemporally tuned particles (STPs) that include a core polymeric particle with a tethering moiety and a tethered particle, allowing for precise spatial and temporal release of agents, with the immunomodulatory agent released before the antigen to induce tolerance or immunostimulation, optimizing the immune response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If agents are released simultaneously from a single particle, then the device complexity is reduced, but the treatment efficacy is compromised due to lack of spatiotemporal control
Solution Approach 1:
The particle is segmented into distinct compartments: a core particle containing first agents and a tethered particle containing second agents. The tethered particle is attached to the core via a tethering moiety, enabling spatial separation of agents while maintaining particle integrity. This segmentation allows independent release control of different agents at different times and locations within the cell, resolving the contradiction between structural simplicity and treatment efficacy.
2Reliability
If agents are delivered to achieve precise spatiotemporal release, then the treatment efficacy is improved, but the device complexity increases due to multiple particle components
Solution Approach 1:
The tethered particle is nested within the overall particle structure, attached to the core particle through a tethering moiety. This nested configuration allows multiple agents to be contained within a single functional particle unit, achieving complex spatiotemporal release patterns without requiring entirely separate delivery systems. The nested structure minimizes the number of discrete components while enabling sophisticated release behavior.
Solution Approach 2:
The core particle and tethered particle are merged into a single functional unit through the tethering moiety, allowing simultaneous delivery of multiple agents to the same cellular location. This merging enables coordinated release patterns (e.g., immunomodulatory agent before antigen) while maintaining the simplicity of a single particle administration, thus improving treatment efficacy without proportionally increasing device complexity.
3Adaptability or versatility
If the immunomodulatory agent and antigen are administered separately, then the dosing flexibility is improved, but the timing precision deteriorates due to lack of coordinated delivery to the same cell
Solution Approach 1:
Multiple agents (immunomodulatory agent and antigen) are combined within a single particle system, ensuring they are delivered to the same dendritic cell within a defined time frame. The core particle and tethered particle can be engineered with different release kinetics, allowing the immunomodulatory agent to be released before the antigen, achieving precise temporal coordination while maintaining dosing flexibility through adjustable particle composition and degradation rates.
Data Source
AI summary
Particles with a spatial and/or temporal release profile for delivery of different agents at different times to the same cells of a subject have been developed. The particles include a core polymeric particle containing a polymer and a first agent, a tethering moiety, covalent linker or covalent linkage attached to the core particle, and a tethered particle attached to the particle via the tethering moiety, covalent linker or covalent linkage and containing a second agent, where the agents are released at different times within or to the same cells. The first and second agents may be a therapeutic or prophylactic agent, such as an antigen, an immunomodulator, an anti-neoplastic agent, a hormone, an inhibitor, etc. The particles may form compositions for treating diseases with a spatial and/or temporal treatment regimen.