Western Blot Pre-Staining for Protein Load Normalization
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Solution Overview
Problem
The standard Western blot method is labor-intensive, time-consuming, and inefficient, with challenges in visualizing separated proteins, requiring multiple steps and apparatuses, leading to reproducibility issues and difficulties in comparing results before and after immunodetection.
Innovation Solution
A method that involves pre-staining proteins, followed by electrophoresis, analysis of total and housekeeping protein loads, transfer to a membrane, and probing for target proteins, allowing for direct comparison and normalization without the need for membrane stripping, using fluorophores and advanced imaging systems for semi-quantitative analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard Western blot method is used, then target protein detection is achieved, but the method is labor-intensive and time-consuming
Solution Approach 1:
The patent applies preliminary action by pre-staining proteins with SYPRO Ruby dye before electrophoresis and transfer. This allows the separated proteins to be visualized and analyzed on the membrane without requiring additional staining steps after transfer, significantly reducing the overall time and labor required while maintaining detection accuracy
Solution Approach 2:
The patent extracts the protein visualization function from the post-transfer staining step and performs it beforehand. By staining proteins before electrophoresis, the method eliminates the need for time-consuming post-transfer staining and destaining procedures, thereby improving productivity without sacrificing measurement precision
2Ease of operation
If protein sample is stained after separation, then protein visualization is achieved, but additional labor and time are required
Solution Approach 1:
The patent performs protein staining with SYPRO Ruby dye before electrophoresis separation. This preliminary staining action ensures proteins are already visualizable when transferred to the membrane, eliminating the need for subsequent staining and destaining operations, thus reducing time loss while maintaining ease of operation
Solution Approach 2:
The patent discards the traditional post-transfer staining step entirely. By recovering the visualization function through pre-staining, the method eliminates unnecessary labor and time consumption associated with staining and destaining after transfer, while still achieving complete protein visualization
3Ease of operation
If Ponceau S staining is used for total protein detection, then labor intensive staining steps are required, but the proteins become visible
Solution Approach 1:
The patent replaces Ponceau S staining with pre-staining using SYPRO Ruby dye before electrophoresis. This eliminates the need for post-transfer staining and destaining steps required by Ponceau S, significantly reducing time loss while maintaining ease of total protein detection and visualization
4Adaptability or versatility
If membrane stripping is performed to re-probe for loading control, then alternative protein detection is achieved, but additional time and complexity are required
Solution Approach 1:
The patent performs preliminary staining of all proteins before electrophoresis and transfer. This allows the membrane to retain visualization of total protein and housekeeping proteins after immunodetection, eliminating the need for time-consuming membrane stripping and re-probing steps while maintaining adaptability for loading control detection
Solution Approach 2:
The patent creates a permanent visual copy of the protein pattern on the membrane through pre-staining. This copy remains after antibody probing, allowing direct comparison and loading control analysis without requiring membrane stripping, thus reducing time loss while maintaining 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
This approach reduces the complexity and time required for Western blot analysis, enhances reproducibility, and enables accurate lane-to-lane comparison of target protein levels by using pre-staining and advanced imaging techniques, eliminating the need for re-probing and improving the quality of protein transfer and loading control.
Implementation Method 1
separating the proteins using gel electrophoresis
Implementation Method 2
electro-transfers the separated proteins to a solid membrane
Data Source
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AI summary
In accordance with an embodiment of the present invention, there is provided a method of performing the western blot analytical technique, wherein the method comprises carrying out the following steps in the following order: a), pre-staining the proteins within a sample; b). separating the proteins using gel electrophoresis; c). analysing the separated proteins to determine the total protein load and/or at least one housekeeping protein load; d). transferring the proteins onto at least one membrane; e). probing the separated proteins to detect a target protein; and f). analysing the probed proteins to determine the target protein's molecular weight and/or load.