Microfluidic Liposomal Adjuvant Manufacturing With Solvent Removal

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Solution Overview

Problem

There is a need for new manufacturing approaches that enable the safe, convenient, and cost-effective production of liposomal adjuvants on a commercially viable scale while maintaining immunological performance.

Innovation Solution

The use of a microfluidic device to manufacture liposomal adjuvants comprising aminoalkyl glucosaminide phosphate compounds or glucopyranosyl lipid adjuvants through mixing solutions containing phosphatidylcholine lipid, solvent, and water, optionally with the addition of saponin, followed by solvent removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional manufacturing methods are used for liposomal adjuvants, then production can be achieved, but the process is costly, complex, and difficult to scale commercially

Engineering Contradiction:

Improveproduction scalabilityVSAvoidmanufacturing process complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent replaces conventional mechanical mixing and extrusion systems with a microfluidic device that uses controlled fluid flow and diffusion to form liposomes. This substitution of mechanical systems with fluid-based microfluidic processes simplifies the manufacturing apparatus, enables precise control over liposome size and distribution, and facilitates scalable production through continuous flow operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention utilizes changes in physical parameters (temperature, flow rate, solvent composition) to control liposome formation and characteristics. By adjusting parameters such as the rate of solvent removal, mixing speed, and temperature during microfluidic processing, the system optimizes liposome size, encapsulation efficiency, and adjuvant activity, enabling consistent quality at scale without complex mechanical intervention.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If conventional manufacturing methods are used for liposomal adjuvants, then production can be achieved, but the cost is high

Engineering Contradiction:

Improveproduction efficiencyVSAvoidmanufacturing cost

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The microfluidic device replaces energy-intensive mechanical homogenization and extrusion steps with passive fluid mixing and diffusion processes. This reduces equipment costs, energy consumption, and operational expenses while maintaining or improving production efficiency. The continuous flow nature of microfluidics also enables higher throughput with smaller equipment footprints.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The microfluidic device integrates multiple functions (mixing, solvent removal, liposome formation, and size control) into a single platform, eliminating the need for multiple separate processing steps and equipment. This multi-functionality reduces overall manufacturing complexity and cost while improving production efficiency and consistency.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If solvent removal is performed to create liposomal adjuvant, then liposomal structure is formed, but residual solvent may remain which could affect safety

Engineering Contradiction:

Improveadjuvant safetyVSAvoidsolvent removal completeness

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The microfluidic device performs preliminary solvent removal during the liposome formation process itself, rather than as a separate post-processing step. The controlled evaporation or extraction of solvent occurs concurrently with liposome assembly, allowing for more complete and uniform solvent removal. This preliminary action reduces residual solvent levels while maintaining liposomal integrity and safety.

Inventive Principle:

Principle #10Preliminary action

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 method allows for the production of liposomal adjuvants with consistent quality and efficiency, suitable for industrial-scale production, while maintaining immunological effectiveness.

Implementation Method 1

mixing solutions containing phosphatidylcholine lipid, solvent, and water

Methodology Applied

Scientific EffectMixing:

Implementation Method 2

followed by solvent removal

Methodology Applied

Scientific EffectSolvent removal: Evaporation

Data Source

PatentUS12551553B2Methods for manufacturing an adjuvant

Publication Date: 2026.02.17 GLAXOSMITHKLINE BIOLOGICALS SA

AI summary

The present invention relates to compositions and methods for manufacturing an adjuvant comprising an aminoalkyl glucosaminide phosphate compound or glucopyranosyl lipid adjuvant using a microfluidic device and to related aspects.