Liposome-Embedded Hydrogel for Local Cell Reprogramming
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Solution Overview
Problem
Matrix-based delivery systems face challenges in maintaining the concentration of bioactive molecules due to diffusion into surrounding tissues, affecting bioactivity and stability.
Innovation Solution
Development of compositions and methods using liposomes embedded in hydrogels, which are selectively incorporated by monocytes through phagocytosis, allowing controlled delivery and modulation of cell behavior, including recruitment and differentiation, to achieve targeted therapeutic effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If bioactive molecules are embedded in a matrix for delivery, then the molecules can be delivered to specific sites in vivo, but the molecules diffuse into surrounding tissue, changing concentration and affecting bioactivity
Solution Approach 1:
The patent embeds liposomes (which contain bioactive molecules) within a matrix structure, creating a nested configuration where molecules are trapped inside liposomes which are themselves embedded in the matrix. This nested arrangement prevents direct diffusion of molecules into surrounding tissue, maintaining both concentration and bioactivity.
Solution Approach 2:
Liposomes serve as an intermediary carrier between the matrix and the surrounding tissue. The bioactive molecules are encapsulated within liposomes, which act as a barrier preventing direct contact and diffusion into tissue, thereby maintaining molecular stability and bioactivity while still enabling controlled delivery.
2Reliability
If compounds are embedded in a matrix, then delivery to specific sites is achieved, but diffusion into surrounding tissue changes concentration and affects bioactivity
Solution Approach 1:
The nested structure of liposomes within the matrix ensures that compounds remain confined to specific locations. The liposomes act as contained units that prevent compound diffusion, thereby maintaining reliable delivery to target sites while preserving appropriate concentration levels.
Solution Approach 2:
The liposome membranes act as flexible barriers that contain compounds within specific regions. These thin film structures prevent uncontrolled diffusion while allowing for controlled release mechanisms, thereby maintaining both delivery reliability and concentration control.
3Stability of the object's composition
If liposomes are embedded in matrix, then compounds are trapped and diffusion prevented, but cell recruitment and specific interaction must be enabled
Solution Approach 1:
The matrix is formulated with specific properties in different regions: liposomes are embedded in areas requiring compound containment, while other regions contain agents for recruiting cells. This local differentiation allows the system to simultaneously achieve stable compound containment and adaptive cell interaction where needed.
Solution Approach 2:
The matrix system performs multiple functions: it contains and stabilizes compounds within liposomes, recruits specific cells through embedded agents, and enables cell-liposome interactions. This multi-functional design allows simultaneous achievement of compound containment and cellular adaptability.
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
This approach ensures sustained delivery and bioactivity of bioactive molecules by trapping them within liposomes, preventing diffusion and allowing specific interaction with phagocytic cells, thereby enhancing therapeutic outcomes such as angiogenesis and immune responses.
Implementation Method 1
Through phagocytosis, monocytes infiltrating the matrix selectively incorporate the liposomes and their contents
Data Source
AI summary
In various embodiments, the present invention describes materials and methods for the local reprogramming of cells in a location where the treatment is applied. The invention can be used to replace lost cells or to restore function to tissue damaged due to disease, injury or genetic defect. In various embodiments, the treatment includes a semisolid hydrogel embedded with liposomes. The liposomes can contain an effector molecule or molecules. When phagocytic cells such as monocytes infiltrate the hydrogel, they encounter the liposomes and incorporate the liposomes carrying the effector molecules into the cells. In some embodiments, the effector molecules can induce angiogenesis. The matrix can contain other effector molecules designed to attract specific cells to the matrix. The cells can also remain in the matrix and secret molecules such as proteins and hormones that will diffuse through the matrix material to the surrounding tissue.