Gene Expression Profiling for Colorectal Cell Origin Detection
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Solution Overview
Problem
Current diagnostic protocols for colorectal adenomas and adenocarcinomas are inadequate for early detection due to asymptomatic nature and difficulty in distinguishing between benign and malignant lesions, necessitating a more informative and accurate method to determine anatomical origin and identify cellular abnormalities in the large intestine.
Innovation Solution
A method utilizing gene expression profiling, specifically measuring the expression levels of certain genes detected by Affymetrix probes to determine the anatomical origin of cells within the large intestine and identify abnormalities by comparing against normal profiles, enabling the detection of proximal or distal origin and potential neoplastic changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current diagnostic protocols are used for colorectal adenomas and adenocarcinomas, then the diagnostic process is simple, but the detection accuracy and ability to distinguish between benign and malignant lesions is insufficient
Solution Approach 1:
The diagnostic protocol is segmented into distinct stages: initial screening using basic clinical methods, followed by targeted gene expression profiling only for suspicious cases. The gene expression analysis itself is segmented into measuring specific marker genes (such as CK20, CDX2, and other intestinal-specific markers) to determine anatomical origin and differentiate between benign and malignant lesions, thereby improving detection accuracy without requiring complete protocol complexity for all cases
Solution Approach 2:
Gene expression profiles serve as an intermediary diagnostic tool between simple clinical protocols and complex histopathological analysis. By measuring the expression patterns of specific genes that are characteristic of different anatomical regions and disease states, the method provides an intermediate layer of information that enhances detection accuracy while maintaining relative protocol simplicity
2Loss of information
If gene expression profiling is implemented to determine anatomical origin and identify cellular abnormalities, then the ability to detect proximal or distal origin and neoplastic changes is improved, but the complexity of the diagnostic method increases
Solution Approach 1:
The method extracts and measures only the specific gene expression information that is relevant to determining anatomical origin and identifying neoplastic changes, rather than analyzing the entire genome. By focusing on a targeted panel of marker genes that have been shown to differentiate between proximal and distal origins and to indicate malignant transformation, the method extracts the essential diagnostic information while keeping the procedure manageable
Solution Approach 2:
The diagnostic approach utilizes parameter changes in gene expression levels to detect anatomical origin and cellular abnormalities. Specific genes exhibit characteristic expression patterns that change according to their anatomical location (proximal vs. distal large intestine) and disease state (benign vs. malignant). By monitoring these expression parameter changes, the method achieves comprehensive information extraction without requiring complete methodological complexity
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 allows for the routine characterization of cell origin and identification of abnormalities, providing valuable insights into the onset or predisposition to conditions like colorectal neoplasms, facilitating early diagnosis and monitoring of therapeutic effectiveness.
Implementation Method 1
an array of nucleic acid molecules, the expression profiles of which characterise the anatomical origin of a cell
Data Source
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AI summary
The present invention relates generally to an array of nucleic acid molecules, the expression profiles of which characterise the anatomical origin of a cell or population of cells within the large intestine. More particularly, the present invention relates to an array of nucleic acid molecules, the expression profiles of which characterise the proximal or distal origin of a cell or population of cells within the large intestine. The expression profiles of the present invention are useful in a range of applications including, but not limited to determining the anatomical origin of a cell or population of cells which have been derived from the large intestine. Still further, since the progression of a normal cell towards a neoplastic state is often characterised by phenotypic de-differentiation, the method of the present invention also provides a means of identifying a cellular abnormality based on the expression of an incorrect expression profile relative to that which should be expressed by the subject cells when considered in light of their anatomical location within the colon. Accordingly, this aspect of the invention provides a valuable means of identifying the existence of large intestine colon cells, these being indicative of an abnormality within the large intestine such as the onset or predisposition to the onset of a condition such as colorectal neoplasm.