Alpha-1 Proteinase Inhibitor Purification Yield
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Solution Overview
Problem
Current methods for isolating alpha-1 proteinase inhibitor (a1PI) from human plasma are inefficient and costly, leading to a limited supply and high production costs due to significant a1PI loss during the purification process.
Innovation Solution
Thawing and incubating frozen protein fractions at an ambient temperature of 2-25°C for several hours before a washing step to reduce a1PI loss and increase yield, followed by subsequent purification steps such as polyethylene-glycol precipitation, ZnCl2 precipitation, and anion-exchange chromatography.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If frozen Cohn fraction IV-1 paste is directly subjected to washing and purification steps, then the process time is reduced, but significant a1PI is lost during the washing step
Solution Approach 1:
The patent applies preliminary action by thawing the frozen Cohn fraction IV-1 paste and incubating it at ambient temperature (2-25°C) for at least 4 hours before subjecting it to the washing step. This pre-treatment allows a1PI to become more accessible and less tightly bound to the paste matrix, thereby significantly reducing a1PI loss during subsequent washing while maintaining overall process efficiency
2Productivity
If conventional purification methods are used, then the process is simpler, but the yield of a1PI is low due to significant losses during processing
Solution Approach 1:
The incubation step at ambient temperature for at least 4 hours serves as a preliminary action that prepares the a1PI-containing paste by allowing a1PI to become more accessible. This simple temperature and time control step significantly reduces a1PI loss during washing without requiring complex equipment or additional chemicals
Solution Approach 2:
The patent utilizes parameter changes by controlling the incubation temperature within the range of 2-25°C and maintaining it for at least 4 hours. This parameter optimization allows a1PI to transition from a tightly bound state in frozen paste to a more accessible state, improving recovery yield without complicating the process
3Ease of manufacture
If the washing step is performed immediately on frozen paste, then the manufacturing cost is lower, but a1PI yield decreases due to loss
Solution Approach 1:
The patent introduces a preliminary incubation step at ambient temperature for at least 4 hours before washing. This low-cost step requires only temperature control and time, no expensive equipment or reagents, yet it dramatically reduces a1PI loss during washing, thereby improving yield without significantly increasing manufacturing cost
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
Significantly increases the yield of a1PI during the purification process, reducing losses during the washing step and improving the overall efficiency and cost-effectiveness of a1PI production.
Implementation Method 1
thawing it at an ambient temperature of 2-25°C until the protein fraction has reached ambient temperature
Implementation Method 2
subjected to a polyethylene-glycol precipitation
Implementation Method 3
followed by another ZnCl2-precipitation
Implementation Method 4
applied to a QAE-column
Data Source
AI summary
The present invention relates to a method for the purification of alpha-1 proteinase inhibitor (a1PI) from protein fractions. More specifically, the invention relates to an improved method for the purification of alpha-1 proteinase inhibitor (a1PI), wherein the yield of a1PI can be increased by thawing the starting material and incubating it for several hours before subjecting it to a washing step.