Platelet Protein Analysis via Segmented Centrifugation and Lysis
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Solution Overview
Problem
Current methods for isolating platelets for analysis, such as centrifugation and gel filtration, often result in platelet activation and lysis, leading to exocytosis of proteins and distorted results in immunoassays, while also failing to effectively separate platelet and plasma proteins, which hampers proteomic studies.
Innovation Solution
A method involving mild centrifugation to separate platelet-rich plasma into pelleted platelets and platelet-poor plasma, followed by individual treatment with lysis buffers to extract proteins from both fractions, which are then pooled for analysis, allowing for optimal treatment and detection of platelet and plasma proteins in a biochip-based immunoassay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centrifugation is used to separate platelets from plasma, then platelet separation is achieved, but platelet activation and lysis occur due to mechanical stress
Solution Approach 1:
The patent divides the platelet-rich plasma into two separate fractions (platelet pellet and plasma supernatant) and treats them individually with lysis buffer, rather than treating the mixed sample as a whole. This segmentation allows optimized processing of each fraction to maximize protein extraction while maintaining platelet integrity during separation.
Solution Approach 2:
The patent performs preliminary centrifugation to separate platelets from plasma before lysis, preventing mechanical stress during the lysis step from causing activation. The platelets are pelleted and stabilized before the lysis buffer is added, ensuring intact protein extraction without activation-induced exocytosis.
2Measurement precision
If gel filtration is used to separate platelet proteins from plasma proteins, then separation is rapid with minimal platelet loss, but larger molecular weight plasma proteins are not eliminated and methodological errors increase
Solution Approach 1:
The patent separates platelet and plasma proteins into distinct fractions through centrifugation, then processes each fraction independently. This segmentation achieves complete separation of platelet proteins from plasma proteins without the incomplete separation issues of gel filtration, while maintaining method robustness through standardized centrifugation parameters.
Solution Approach 2:
The patent uses centrifugation force and velocity as controllable parameters to achieve optimal separation. By adjusting centrifugation parameters (e.g., 2000-5000g for 5-15 minutes), the method reliably separates platelets from plasma while maintaining platelet integrity, providing a robust alternative to gel filtration.
3Duration of action of stationary object
If platelets are frozen for storage and then thawed, then storage is enabled, but lysis of platelet membranes occurs releasing contents into surrounding medium
Solution Approach 1:
The patent performs protein extraction and analysis immediately after centrifugation while platelets are still intact and fresh. By completing the analysis before freezing/thawing cycles, the method eliminates the risk of freeze-thaw induced lysis while ensuring high-quality protein extraction from intact platelets.
4Quantity of substance
If detergents such as SDS are used to lyse platelets for protein extraction, then protein extraction is achieved, but epitopes are disrupted and antibodies are denatured leading to distorted immunoassay results
Solution Approach 1:
The patent uses mild non-ionic detergents (e.g., Triton X-100, NP-40) instead of harsh ionic detergents like SDS. This parameter change in detergent type allows effective protein extraction while preserving epitope integrity and antibody functionality, ensuring accurate immunoassay results.
Solution Approach 2:
The patent applies different treatment conditions to different fractions: the platelet pellet is lysed with detergent to extract proteins, while the plasma supernatant is processed separately. This localized treatment optimizes protein extraction from platelets while maintaining the integrity of plasma proteins for separate analysis.
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 minimizes platelet activation and lysis, enabling more accurate and efficient analysis of platelet proteins by separating and treating platelet and plasma fractions separately, resulting in higher protein concentrations and improved diagnostic accuracy.
Implementation Method 1
The first step in the isolation of platelets for analysis is generally the separation of platelets from whole blood through centrifugation
Data Source
AI summary
The present invention provides a novel method of in vitro sample preparation for the analysis of proteins. In a first aspect, the present invention is a method comprising the separation and individual treatment of blood platelets and platelet-poor plasma obtained from a platelet-rich plasma sample. This allows for optimal treatment of both fractions and overcomes many of the problems associated with current methods. In a second aspect of the present invention the platelet sample preparation method can be implemented before a biochip based immunoassay for the detection of platelet proteins in combination with plasma proteins.