Multi-Column Exosome Isolation for Lipoprotein Removal
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Solution Overview
Problem
Conventional column chromatography methods for isolating exosomes often require multiple steps, are time-consuming, and result in the elution of lipoproteins along with exosomes, leading to impurity issues and potential loss of exosomes.
Innovation Solution
A multi-column system comprising porous beads with specific pore sizes and surface charges, stacked in a particular ratio, and a separation membrane, is used to isolate exosomes from lipoproteins and water-soluble proteins in biological samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional column chromatography is used to isolate exosomes, then exosomes can be separated from biological samples, but lipoproteins are eluted together with exosomes resulting in impurity
Solution Approach 1:
The invention divides the single column into two separate columns: a first column containing beads for removing lipoproteins and a second column containing beads for isolating exosomes. This segmentation allows sequential processing where lipoproteins are removed first, then exosomes are isolated from the clarified sample, preventing lipoprotein contamination in the final exosome preparation.
2Manufacturing precision
If multiple separation steps are performed in conventional column chromatography, then separation may be achieved, but a relatively long period of time is required
Solution Approach 1:
The invention combines two separation functions into a integrated two-column system where the first column removes lipoproteins and the second column isolates exosomes in sequence. By optimizing the bead characteristics and flow conditions, both separation steps are performed efficiently without requiring excessive time, achieving effective separation while maintaining reasonable processing speed.
3Manufacturing precision
If conventional column chromatography is used, then exosome separation may be achieved, but exosomes may be lost during the process
Solution Approach 1:
The invention optimizes the local properties of beads in each column specifically for their intended function. The first column uses beads with properties optimized for lipoprotein removal, while the second column uses beads with properties optimized for exosome isolation. This localized optimization ensures that exosomes are handled gently during the process, minimizing loss while achieving effective separation.
4Quantity of substance
If existing column chromatography focuses only on exosome elution section, then exosome isolation may be achieved, but lipoprotein separation is insufficient
Solution Approach 1:
The invention segments the separation process into two distinct functional columns. The first column is specifically designed and optimized for lipoprotein removal, while the second column is optimized for exosome isolation. This segmentation ensures that lipoprotein separation is thoroughly addressed before exosome recovery, achieving both high exosome recovery and effective lipoprotein removal.
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 multi-column system significantly increases the purity of isolated exosomes by effectively separating them from impurities, such as lipoproteins and water-soluble proteins, using size-exclusion chromatography.
Implementation Method 1
the porous beads a isolate exosomes from lipoproteins in a biological sample, and the porous beads b isolate the exosomes from water-soluble proteins in the biological sample
Data Source
AI summary
The present invention relates to a multi-column for isolating exosomes and an exosome isolation method, for isolating exosomes from a biological sample containing exosomes mixed with impurities such as lipoproteins and water-soluble proteins.