Multicompartment Macroencapsulation Membranes for Cell Viability

Solution Overview

Problem

Existing macroencapsulation devices face challenges in efficiently delivering biological products, such as insulin, due to issues like hypoxia, poor nutrition, and immune responses during the period between implantation and vascularization, leading to cell necrosis and device failure.

Innovation Solution

A multicompartment macroencapsulation device with semipermeable membranes allows for fluid communication between compartments, enabling filtrate flow and ancillary agent delivery, reducing trauma and improving cell survival by controlling pressure differentials and concentration gradients.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If cells are loaded directly into the macroencapsulation device, then cell loading is simple, but tissue trauma and immune responses occur leading to cell necrosis

Engineering Contradiction:

Improvecell loading simplicityVSAvoidtissue trauma and immune responses

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The device is divided into multiple compartments separated by semipermeable membranes. A first compartment receives cells while a second compartment receives ancillary agents, allowing separate optimization of cell loading and reducing trauma through controlled fluid communication between compartments

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Semipermeable membranes act as intermediaries between compartments, controlling fluid communication to allow nutrient and waste exchange while preventing direct cell contact with potentially harmful substances in the external environment, thereby reducing tissue trauma and immune responses

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If a single compartment design is used, then device complexity is low, but hypoxia and poor nutrition occur during vascularization

Engineering Contradiction:

Improvecompartment structureVSAvoidhypoxia and poor nutrition

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The device is divided into multiple compartments separated by semipermeable membranes. A first compartment receives cells while a second compartment receives ancillary agents, allowing separate optimization of cell loading and reducing trauma through controlled fluid communication between compartments

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Semipermeable membranes act as intermediaries between compartments, controlling fluid communication to allow nutrient and waste exchange while preventing direct cell contact with potentially harmful substances in the external environment, thereby reducing tissue trauma and immune responses

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If semipermeable membranes are used for fluid communication, then nutrient and waste exchange is improved, but device complexity increases

Engineering Contradiction:

Improvebiological product deliveryVSAvoidmembrane structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The semipermeable membranes are designed with specific hydraulic permeability and porosity parameters that optimize fluid communication. The membranes allow controlled passage of nutrients and wastes while maintaining structural integrity, achieving improved biological product delivery without excessive complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

Semipermeable membranes with controlled porosity are used to enable fluid communication between compartments. The porous structure allows nutrients and wastes to pass through while maintaining membrane integrity, improving biological product delivery through a well-established material science approach

Inventive Principle:

Principle #31Porous materials

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 device enhances cell viability and reduces immune responses by facilitating controlled delivery of nutrients and waste management, promoting prevascularization and minimizing tissue trauma during cell loading.

Implementation Method 1

applying a pressure differential between the primary compartment and a secondary compartment of the macroencapsulation device to flow a filtrate from the primary compartment to the secondary compartment through a first semipermeable membrane

Methodology Applied

Scientific EffectFiltration: Filter (physical)

Implementation Method 2

flowing an ancillary agent from a secondary compartment of the macroencapsulation device into the primary compartment through a first semipermeable membrane

Methodology Applied

Scientific EffectDiffusion: Diffusion

Data Source

PatentUS12515028B2Multicompartment macroencapsulation devices

Publication Date: 2026.01.06 VERTEX PHARMACEUTICALS INC

AI summary

Macroencapsulation devices and their methods of use are disclosed. In one embodiment, a macroencapsulation device may include a first outer membrane, a second outer membrane, and at least one semipermeable membrane disposed there between to form at least a primary compartment configured to house a first population of cells and a secondary compartment in fluid communication with the primary compartment through the first semipermeable membrane. In some embodiments, the flow of material into and out of the compartments of the macroencapsulation device and/or the application of an appropriate pressure differential between the compartments may be used to control the flow of filtrates, ancillary agents, and other materials between the compartments of the device when positioned in vivo.