Sequential Affinity Chromatography for Plasma Protein Purification
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Solution Overview
Problem
Current protein purification methods from biological samples, such as plasma, face challenges in achieving high yield and purity while maintaining specific activity, especially when isolating multiple protein targets simultaneously, due to non-specific binding and inefficient sequential processing.
Innovation Solution
The method involves using affinity chromatography with two or more ligands specifically binding to target proteins in a predetermined order, attached to a support matrix, without pre-conditioning the biological sample, to sequentially isolate and purify proteins like fibrinogen, immunoglobulins, and albumin, using synthetic affinity ligands like Mimetic Blue and MAbsorbent, which allows for high recovery and purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional purification steps are used to isolate a single protein target, then purity can be achieved, but the number of steps increases and yield decreases
Solution Approach 1:
The invention divides the purification process into multiple parallel affinity chromatography steps, each targeting a specific protein class (e.g., albumin, immunoglobulins, fibrinogen, complement components). This segmentation allows simultaneous purification of multiple proteins from plasma in a single processing run, maintaining high purity while improving overall yield by avoiding sequential processing losses.
Solution Approach 2:
The invention creates a universal plasma protein purification system that can simultaneously isolate multiple different protein targets using a single platform. By employing multiple affinity chromatography columns with specific ligands (Protein A for immunoglobulins, Mimetic Blue for albumin, etc.), the system serves multiple purification functions in one operation, increasing productivity without sacrificing purity.
2Productivity
If multiple protein targets are isolated simultaneously from plasma, then productivity increases, but non-specific binding and purification efficiency decrease
Solution Approach 1:
The invention applies local quality by designing specific affinity ligands tailored to each protein target's unique binding characteristics. Each chromatography column uses a ligand with specific affinity for its target protein (e.g., Protein A for IgG, Mimetic Blue for albumin), ensuring high specificity and minimizing non-specific binding. This localized optimization of ligand-protein interactions maintains purification efficiency even when multiple proteins are processed simultaneously.
3Quantity of substance
If pre-conditioning steps are applied to the biological sample, then protein recovery improves, but processing time and complexity increase
Solution Approach 1:
The invention performs preliminary action by pre-equilibrating the affinity chromatography columns with plasma-compatible buffers and optimizing ligand orientations before sample processing. The columns are pre-conditioned to immediately accept plasma proteins without requiring pre-treatment of the plasma sample itself. This eliminates time-consuming pre-conditioning steps while maintaining high protein recovery through optimized column-plasma interactions.
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 approach results in highly purified plasma proteins with at least 70% purity, reducing the number of purification steps and manufacturing costs, while maintaining the activity of proteins like paraoxonase, and is applicable for biopharmaceutical production and diagnostic applications.
Implementation Method 1
Affinity chromatography is one of the most important separation techniques at the heart of the drug discovery and process development
Implementation Method 2
The more selective the affinity step(s), the greater the efficiency of the entire enterprise, which is a critical requirement in protein fractionation experiments. Affinity chromatography finds a number of practical applications in purification, detection and removal of target molecules from multicomponent streams.
Data Source
AI summary
The invention discloses methods for sequential protein isolation and purification from a biological sample by affinity chromatography. Affinity chromatography is conducted using ligands or ligand support complexes that selectively and specifically bind to proteins in the biological sample. The ligands or ligand support complexes were contacted sequentially in a predetermined order with the biological sample to allow each ligand or ligand-support complex to sequentially bind a protein from the biological sample.