Continuous Nanoparticle Processing for Liposome Loading and Coating

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Solution Overview

Problem

Conventional pharmaceutical manufacturing of liposomal nanoparticles is inefficient and variable due to prolonged batch processing times, high temperatures, and uncontrolled crystal growth, leading to inconsistent drug product quality and potential adverse reactions.

Innovation Solution

A continuous processing system for modifying pre-formed vesicular nanoparticles, allowing for controlled intravesicular and extravesicular modifications through active loading and surface coating in a single, continuous process, using a system comprising inlets, pumps, flow meters, mixing chambers, and heat exchangers to manage parameters like flow rate, temperature, and mixing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If batch processing is used for liposomal nanoparticle manufacturing, then molecular entrapment and surface modifications can be achieved, but processing time is prolonged and product consistency deteriorates

Engineering Contradiction:

Improveproduct consistencyVSAvoidprocessing time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent implements continuous processing where pre-formed liposomes continuously flow through mixing chambers that maintain optimized conditions for molecular entrapment and surface modifications. This eliminates batch-to-batch variations and reduces total processing time while maintaining consistent product quality through uninterrupted processing operations.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The patent pre-forms liposomes with controlled size and structure before continuous processing, then introduces modifying agents in the continuous stream. This preliminary preparation ensures that the continuous processing step only needs to perform modifications efficiently, reducing overall processing time while maintaining product consistency.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If high temperature is applied during processing, then molecular loading efficiency is improved, but crystal growth becomes uncontrolled and product quality deteriorates

Engineering Contradiction:

Improvemolecular loading efficiencyVSAvoidcrystal growth control

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent employs precise temperature control in the continuous processing system, maintaining temperatures that optimize molecular loading efficiency while preventing uncontrolled crystal growth. Flow rate and residence time parameters are adjusted to ensure adequate loading without excessive heat exposure that would cause morphological changes.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The continuous processing system incorporates monitoring that tracks temperature, flow rate, and product characteristics in real-time, allowing immediate adjustments to maintain optimal conditions for molecular loading while preventing crystal growth issues.

Inventive Principle:

Principle #23Feedback

3Manufacturing precision

If multiple subsequent processes are used for pre-formed liposomes, then molecular entrapment and surface modifications are achieved, but process complexity increases and productivity decreases

Engineering Contradiction:

Improvemodification controlVSAvoidmanufacturing efficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent combines molecular entrapment and surface modification operations into a single continuous processing step where both functions occur simultaneously as liposomes flow through the system. This integration eliminates the need for multiple separate batch processes, reducing complexity while maintaining modification precision and improving overall productivity.

Inventive Principle:

Principle #5Merging (Combining)

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

Enables precise control over nanoparticle morphology and encapsulation, reducing adverse reactions and batch variability, ensuring high-quality drug products with minimized safety issues.

Implementation Method 1

applying heat to the well-mixed colloidal and molecular dispersion via a first heat exchanger to create a plurality of modified nanoparticles

Methodology Applied

Scientific EffectHeat transfer: Heating

Implementation Method 2

For liposomal nanoparticles that are less than 1,000 d·nm, these particles exhibit Brownian motion and remain as a colloidal dispersion since the thermal motion of the particles overcome gravitational forces

Methodology Applied

Scientific EffectBrownian motion: Brownian Motion

Data Source

PatentUS12434208B2Continuous processing system and methods for internal and external modifications to nanoparticles

Publication Date: 2025.10.07 UNIV OF CONNECTICUT

AI summary

The present disclosure provides a system for the internal and external modification of nanoparticles in a continuous process. The system includes (a) a first inlet, (b) a second inlet, (c) a first pump in fluid communication with the first inlet, (d) a second pump in fluid communication with the second inlet, (e) a first flow meter positioned between the first pump and the first mixer, (f) a second flow meter positioned between the second pump and the first mixer, and (g) a mixing chamber in fluid communication with the first flow meter and the second flow meter, and (h) a first heat exchanger in fluid communication with the mixing chamber.