Stable-Isotope SCFA Tracing for Accurate Colonic Production Measurement
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Solution Overview
Problem
Current methods for measuring short-chain fatty acid production in the colon are inaccurate due to high absorption by colonocytes and metabolism by the liver, making it difficult to estimate actual production levels in humans, which is crucial for understanding their impact on health and diagnosing conditions like chronic obstructive pulmonary disease and autism.
Innovation Solution
A method involving the administration of stable-isotope labeled short-chain fatty acids with soluble fibers, followed by compartmental analysis of blood samples, to accurately calculate metabolic rates and diagnose deficiencies in short-chain fatty acid production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current methods measure short-chain fatty acid content in feces or plasma, then measurement can be performed, but the measurement precision is poor due to high absorption by colonocytes (95%) and metabolism by the liver
Solution Approach 1:
The patent uses stable isotope-labeled short-chain fatty acids as a tracer substance to indirectly measure production rates. The labeled tracer serves as an intermediary that allows tracking of short-chain fatty acid metabolism without being completely absorbed and metabolized, enabling accurate measurement of production rates despite the 95% absorption rate by colonocytes and liver metabolism.
2Measurement precision
If stable isotope labeled short-chain fatty acids are administered with soluble fiber, then metabolic rate can be accurately calculated, but the device complexity and procedure complexity increase
Solution Approach 1:
The patent administers stable isotope-labeled short-chain fatty acids together with soluble fiber in a controlled protocol before conducting blood sampling. This preliminary administration establishes a known tracer concentration in the system, enabling subsequent compartmental analysis to accurately calculate metabolic rates without requiring complex real-time adjustments during the measurement process.
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
Enables precise diagnosis of chronic obstructive pulmonary disease and autism by comparing metabolic rates between subjects and healthy controls, indicating deficiencies in short-chain fatty acid production.
Implementation Method 1
A method involving the administration of stable-isotope labeled short-chain fatty acids with soluble fibers, followed by compartmental analysis of blood samples, to accurately calculate metabolic rates
Data Source
AI summary
Provided herein are methods for diagnosing a pulmonary disease, for example chronic obstructive pulmonary disorder, in a subject and for diagnosing a neurological disorder, for example, autism in a subject. Also provided is a method for increasing short chain fatty acid production in an older subject. Generally, the methods utilize stable isotope labeled, for example, 13C-labeled, short chain fatty acid from which metabolic rates and concentrations are calculated to confirm a diagnosis or increase in the short chain fatty acid production.