Lyophilized Therapeutic Protein Fill Weight Adjustment
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Solution Overview
Problem
Current methods for producing lyophilized pharmaceutical formulations of therapeutic proteins face challenges in ensuring precise control over fill weight and maintaining protein stability, leading to variability in protein concentration post-reconstitution and potential instability during storage.
Innovation Solution
A process is developed to formulate, fill, and adjust the fill weight of therapeutic proteins to achieve a fixed dose, followed by lyophilization, ensuring that the protein concentration post-reconstitution with a fixed volume of diluent is within a predetermined acceptance range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simple fill process is used, then productivity is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent applies preliminary action by measuring the concentration of the therapeutic protein in the bulk formulation before the fill process. This advance measurement allows the fill weight to be adjusted based on actual concentration data, ensuring precise dosing without requiring complex real-time control during filling, thus maintaining productivity while improving precision.
Solution Approach 2:
The patent implements feedback by using the measured protein concentration to adjust the fill weight. The system closes the loop by taking the measurement result and using it to modify the filling process parameters, ensuring that the final dose in each container is accurate despite variations in bulk concentration.
2Ease of manufacture
If fixed fill weight is used, then ease of manufacture is improved, but reliability deteriorates
Solution Approach 1:
The patent performs concentration measurement before filling, allowing the fill weight to be predetermined and adjusted based on actual bulk concentration. This preliminary action ensures that each container receives the correct dose while maintaining a simple fill process without complex real-time adjustments.
Solution Approach 2:
The patent changes the fill weight parameter based on the measured protein concentration. By adjusting this key parameter according to actual concentration data, the system ensures reliable and consistent protein concentration in the final product while keeping the manufacturing process simple and straightforward.
3Productivity
If conventional lyophilization process is used, then productivity is improved, but stability deteriorates
Solution Approach 1:
The patent adjusts the fill weight before lyophilization based on measured concentration, ensuring that the correct amount of protein is placed in each container. This preliminary adjustment prevents stability issues that could arise from concentration variations, allowing conventional lyophilization processes to be used without compromising protein stability.
4Manufacturing precision
If concentration measurement and adjustment is implemented, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent performs concentration measurement and fill weight adjustment as preliminary steps before the main fill and lyophilization processes. By consolidating these control actions into predefined steps based on bulk measurements, the system achieves high manufacturing precision without requiring complex real-time control systems or additional equipment during the critical fill and drying phases.
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 process ensures precise control over protein concentration post-reconstitution, reducing variability and enhancing stability, thereby improving the reliability and efficacy of lyophilized pharmaceutical formulations.
Implementation Method 1
Freeze-drying, or lyophilization, is a process by which the material to be dried is first frozen and then the ice or frozen solvent is removed by sublimation in a vacuum environment.
Implementation Method 2
Freeze-drying, or lyophilization, is a process by which the material to be dried is first frozen and then the ice or frozen solvent is removed by sublimation in a vacuum environment.
Data Source
AI summary
This invention concerns a process for making a lyophilized pharmaceutical formulation of a therapeutic protein, which comprises (a) providing a formulation of a bulk amount of the therapeutic protein, (b) measuring the concentration of the therapeutic protein in said bulk formulation, (c) adjusting the fill weight of the protein in said bulk formulation to achieve a fixed dose of the protein, and (d) lyophilizing the protein fill weight-adjusted formulation to achieve a final formulation in a container, wherein the product concentration post reconstitution with a fixed volume is within a predetermined acceptance range. The process is particularly suitable for formulations with low protein concentrations (e.g., 0.05 mg/mL to 20 mg/mL).