Exosome Immunoaffinity Isolation Using Dystroglycan Markers
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Solution Overview
Problem
Existing methods face challenges in isolating tissue-specific exosomes from complex biological samples like blood and other biofluids for biomarker identification and therapeutic targeting, as current purification techniques are inefficient and often interfere with exosome isolation.
Innovation Solution
A method involving the use of dystroglycan (DAG) as a cell-surface polypeptide on exosomes, utilizing a binding partner such as a monoclonal IgG2a antibody, preferably MIgG2a, coupled to superparamagnetic beads, to specifically isolate exosomes through immunoaffinity purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional purification techniques are used to isolate exosomes from complex biological samples, then exosome isolation can be achieved, but the purification is inefficient and interferes with exosome isolation
Solution Approach 1:
The patent uses tissue-specific surface proteins as intermediary markers to selectively bind and isolate exosomes from complex biological samples. These surface proteins serve as mediators that specifically recognize and capture target exosomes, enabling efficient separation from non-target vesicles and background molecules without interference
Solution Approach 2:
The invention changes the isolation parameter from generic physical properties to specific molecular recognition based on tissue-specific surface protein markers. This parameter change enables selective isolation of exosomes from particular cell types, improving both efficiency and purity by targeting unique molecular signatures rather than relying on bulk separation methods
2Adaptability or versatility
If generic exosome isolation methods are used, then exosomes can be recovered, but tissue-specific exosomes cannot be distinguished
Solution Approach 1:
The patent applies local quality by targeting specific tissue-specific surface proteins on exosome surfaces rather than treating all exosomes uniformly. This localized molecular targeting enables distinction between exosomes from different tissue origins based on their unique surface protein markers, providing tissue-specific isolation capability
Solution Approach 2:
The invention creates a universal isolation approach that can be adapted to any tissue type by selecting the appropriate tissue-specific surface protein marker. The same basic isolation methodology works across different tissues by simply changing the target marker, providing both specificity and versatility
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
Effectively isolates exosomes from various biological samples, including blood serum, with high specificity and minimal interference, enabling further analysis and therapeutic targeting.
Implementation Method 1
coupled to superparamagnetic beads
Implementation Method 2
utilizing a binding partner such as a monoclonal IgG2a antibody, preferably MIgG2a, coupled to superparamagnetic beads, to specifically isolate exosomes through immunoaffinity purification
Data Source
AI summary
The present invention relates to a method of isolating exosomes. Specifically, the invention relates to a method comprising the steps of providing a sample including exosomes; identifying a cell-surface polypeptide on the exosomes; and isolating the exosomes using the cell-surface polypeptide on the exosomes. The exosomes isolated from by the methods of the invention can be studied for the purposes of biomarker identification, for the understanding of biological function and disease, and to find ways to target them with therapeutics.