Specimen Processing Chamber With Controlled Heating for Antigen Retrieval
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Solution Overview
Problem
Fixation of biological samples with formalin interferes with the detection of proteins and nucleic acids, making existing antigen retrieval methods incomplete and less amenable to automation.
Innovation Solution
A specimen processing assembly comprising complementary lower and upper plates, which form a sealed chamber for unmasking antigens, where the specimen or substrate is maintained at a lower temperature than other components, and controlled heating and pressurization are used to facilitate antigen retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If formalin fixation is used to preserve tissue morphology, then spatial distribution of biomolecules is preserved, but detection of proteins and nucleic acids is interfered with
Solution Approach 1:
The patent applies parameter changes by controlling temperature and pressure conditions during antigen retrieval. The system heats the chamber to specific temperatures (e.g., 95-100°C) and maintains controlled pressure to reverse formalin cross-linking effects, thereby restoring antigen detectability while preserving morphological integrity.
Solution Approach 2:
The patent implements preliminary anti-action by performing antigen retrieval treatment before detection procedures. The formalin-induced cross-linking that masks antigens is counteracted in advance through controlled heating and pressurization, ensuring that subsequent detection reagents can access their targets effectively.
2Reliability
If heat induced antigen retrieval is used to unmask antigens, then antigen accessibility is improved, but automation difficulty increases
Solution Approach 1:
The patent implements self-service through an automated control system that manages the entire antigen retrieval process. The system automatically controls heating elements, pressure regulation, and timing sequences, eliminating the need for manual intervention while maintaining consistent temperature and pressure conditions for effective antigen unmasking.
Solution Approach 2:
The patent applies feedback control through sensors that monitor temperature and pressure conditions within the chamber. The control system receives real-time data from these sensors and adjusts heating and pressure parameters accordingly, ensuring precise maintenance of predetermined conditions throughout the antigen retrieval process.
3Measurement precision
If temperature control is applied to maintain specimen at lower temperature, then detection efficiency is enhanced, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the temperature control system into distinct functional zones. The chamber is separated into regions with different thermal requirements: a heating zone for antigen retrieval and a cooling zone for maintaining the specimen at lower temperatures. This segmentation allows independent control of each zone using dedicated heating and cooling elements.
Solution Approach 2:
The patent implements local quality by providing differentiated temperature control for different parts of the system. The specimen holder or specific chamber regions are maintained at lower temperatures while other areas undergo heating for antigen retrieval. This localized temperature differentiation optimizes detection efficiency without requiring uniform temperature control throughout the entire device.
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 unmask antigens and nucleic acid targets in fixed biological samples, maintaining the specimen at a controlled temperature to enhance detection efficiency and enable automation.
Implementation Method 1
The chamber is heated to a predetermined temperature
Implementation Method 2
the specimen or substrate is maintained at a lower temperature than any other component within the chamber
Implementation Method 3
controlled heating and pressurization are used to facilitate antigen retrieval
Data Source
Figure 1A~1C
Figure 1D~1E
Figure 1F~1G
AI summary
The present disclosure is directed to specimen processing assemblies including (a) a lower plate (10), (b) an upper plate (30) complementary to the lower plate, and (c) a chamber formed therefrom. In some embodiments, the formed chamber is adapted to perform an unmasking operation, e.g. antigen retrieval and/or target retrieval. In some embodiments, the specimen processing assemblies are configured to maintain a specimen-bearing substrate (15) horizontal during all processing steps. The present disclosure is also directed to systems including one or more independently operable specimen processing assemblies.