Egg Yolk IgY Purification Without Chromatography
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Solution Overview
Problem
Current methods for purifying immunoglobulin G (IgG) from mammalian serum are costly, involve animal discomfort, and result in non-specific reactions, while existing IgY purification processes from egg yolk are inefficient and require expensive chromatographic steps.
Innovation Solution
A process involving centrifugation, selective precipitation with biocompatible agents like polyethylene glycol, and ultrafiltration to purify immunoglobulin Y (IgY) from egg yolk, achieving high purity and yield without chromatography.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If chromatographic processes are used to purify antibodies from mammalian serum, then purity can be achieved, but the process becomes costly and time-consuming
Solution Approach 1:
The invention extracts and removes the time-consuming chromatographic steps from the purification process, replacing them with a simpler precipitation method using polyethylene glycol that achieves comparable purity in significantly less time
Solution Approach 2:
The invention replaces expensive, complex chromatographic systems with inexpensive, simple precipitation reagents (polyethylene glycol and salts) that can be easily disposed of after use, reducing both cost and time investment
2Quantity of substance
If IgG is obtained from mammalian serum through blood collection, then antibodies can be acquired, but animal discomfort and ethical concerns arise
Solution Approach 1:
The invention uses an intermediary system (chickens as egg-laying animals) that naturally produces antibodies in their eggs without requiring invasive procedures, thus mediating between the need for antibodies and the desire to avoid animal harm
Solution Approach 2:
The invention extracts antibodies from an alternative source (egg yolk) rather than from mammalian blood, removing the harmful element of invasive blood collection while maintaining antibody production
3Quantity of substance
If existing IgY purification methods are used from egg yolk, then antibodies can be obtained, but the processes are inefficient and require expensive chromatographic steps
Solution Approach 1:
The invention substitutes complex mechanical chromatographic systems with a simpler chemical precipitation system using polyethylene glycol, reducing device complexity while maintaining or improving IgY yield
Solution Approach 2:
The invention changes the purification parameters from complex chromatographic conditions to simple precipitation conditions (temperature, pH, polymer concentration), simplifying the process while achieving high purity
4Reliability
If mammalian-derived antibodies (IgG) are used, then immunotherapy can be performed, but non-specific reactions and cross-reactivity occur
Solution Approach 1:
The invention inverts the approach by using avian-derived antibodies (IgY) instead of mammalian-derived antibodies (IgG), exploiting the phylogenetic distance between birds and mammals to avoid cross-reactivity with the human immune system
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 process achieves IgY purity above 98% and yield of 100-120 mg per egg yolk, overcoming the inefficiencies and costs of existing methods, with biocompatible and inexpensive agents, and avoiding non-specific reactions.
Implementation Method 1
The egg yolk is subjected to a freezing and thawing step
Implementation Method 2
The egg yolk is centrifuged in order to obtain an aqueous soluble protein fraction
Implementation Method 3
subjecting the aqueous soluble protein fraction to at least one precipitation step with a precipitating agent
Implementation Method 4
ultrafiltration of the aqueous soluble protein fraction subjected to at least one precipitation step in order to obtain the purified antibody, and removing the precipitating agent
Data Source
AI summary
A process for purifying an antibody from egg yolk is provided in which an egg yolk is centrifuged to obtain an aqueous soluble protein fraction, and the aqueous soluble protein fraction is subjected to at least one precipitation step with a precipitating agent. The aqueous soluble protein is then ultrafiltrated to obtain the purified antibody, and the precipitating agent is then removed.