IVIG Purification Process for Higher IgG Yield and Purity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current IVIG production methods result in significant IgG loss during purification, limiting yield and necessitating improved manufacturing processes to meet increasing global demand.
Innovation Solution
A multi-step alcohol precipitation method combined with ion exchange chromatography, including spray addition of alcohol and pH adjustment, is employed to enhance IgG yield without compromising purity, utilizing cryo-poor plasma fractions and additional purification techniques like nanofiltration and ultrafiltration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current IVIG production methods are used, then purification is achieved, but IgG loss is significant and yield is limited
Solution Approach 1:
The patent modifies traditional alcohol fractionation parameters including pH control (maintaining pH 6.8-7.2), temperature control (0-4°C), and alcohol concentration gradients to optimize IgG precipitation conditions and minimize losses
Solution Approach 2:
The purification process is divided into multiple sequential fractionation steps (Fraction I, II, III) with progressively optimized conditions, allowing incremental purification while preserving IgG at each stage
2Manufacturing precision
If alcohol precipitation and ion exchange chromatography are used, then IgG purity is enhanced, but process complexity increases
Solution Approach 1:
The patent combines alcohol fractionation and ion exchange chromatography into an integrated process where each method complements the other, achieving high purity through synergistic purification mechanisms
Solution Approach 2:
The process maintains continuous purification action through sequential steps without interrupting the IgG recovery, ensuring consistent quality while managing complexity through standardized operating procedures
3Productivity
If multiple purification steps are implemented, then IgG yield is improved, but production time increases
Solution Approach 1:
The patent performs preliminary alcohol fractionation steps before ion exchange chromatography to pre-concentrate and pre-purify IgG, reducing the burden on subsequent steps and optimizing overall process efficiency
Solution Approach 2:
The process rapidly proceeds through optimized fractionation steps with controlled incubation times, minimizing unnecessary delays while ensuring complete purification at each stage
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 method achieves IgG yields at least 10% higher than current methods, providing high-purity IVIG compositions suitable for intravenous, subcutaneous, or intramuscular administration, addressing the demand for improved IVIG production efficiency.
Implementation Method 1
precipitating IgG from the supernatant with between about 20% and about 30% alcohol
Implementation Method 2
ion exchange chromatography
Implementation Method 3
nanofiltration
Implementation Method 4
ultrafiltration
Data Source
AI summary
The present invention provides improved methods for the manufacturing of IVIG products. These methods offer various advantages such as reduced loss of IgG during purification and improved quality of final products. In other aspects, the present invention provides aqueous and pharmaceutical compositions suitable for intravenous, subcutaneous, and/or intramuscular administration. In yet other embodiments, the present invention provides methods of treating a disease or condition comprising administration of an IgG composition provided herein.