Rosacea Diagnosis via Demodex Microbiota 16S rRNA Sequencing

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Solution Overview

Problem

Current methods for diagnosing rosacea and distinguishing between its subtypes are inadequate, as they fail to provide a reliable and consistent means of identifying the specific microbiota associated with Demodex mites, which are linked to the disease.

Innovation Solution

A method involving 16SrRNA sequencing or pyrosequencing is used to analyze the microbiota associated with Demodex mites, focusing on the prevalence of specific bacteria such as Bartonella and Escherichia coli, and phyla like Firmicutes and Proteobacteria to diagnose and differentiate between erythematotelangiectatic and papulopustular rosacea.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If culture-dependent studies are used to analyze Demodex mites, then the process is simpler and more accessible, but the skin microbiota picture is inconsistent and incomplete

Engineering Contradiction:

Improveease of analysisVSAvoidconsistency of microbiota picture

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent replaces culture-dependent mechanical methods with molecular biology techniques (16S rRNA gene sequencing) to analyze Demodex mite microbiota. This substitution enables comprehensive identification of bacterial communities without relying on culturing capabilities, providing consistent and complete microbiota profiles across different samples and laboratories.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If 16S rRNA gene sequencing is used to characterize Demodex microbiota, then the microbiota picture becomes consistent and comprehensive, but the device complexity and method sophistication increase

Engineering Contradiction:

Improveconsistency of microbiota pictureVSAvoidcomplexity of sequencing method

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the complex 16S rRNA gene sequencing process into distinct, manageable components: DNA extraction from Demodex mites, PCR amplification of specific 16S rRNA regions, high-throughput sequencing, and bioinformatics analysis. This segmentation allows each step to be optimized and controlled separately, reducing overall complexity while maintaining reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses the 16S rRNA gene as an intermediary marker to indirectly characterize the entire bacterial microbiota of Demodex mites. This intermediary approach allows comprehensive microbiota profiling without needing to culture or directly observe all bacterial species, simplifying the overall characterization process while maintaining consistency.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If current diagnostic methods are used for rosacea, then the diagnosis process is straightforward, but the ability to reliably identify specific microbiota associated with Demodex mites is insufficient

Engineering Contradiction:

Improvesimplicity of diagnosisVSAvoidprecision of microbiota identification

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent replaces conventional clinical diagnostic methods with molecular sequencing-based microbiota analysis. This substitution enables precise identification of specific bacterial taxa associated with Demodex mites in rosacea patients, providing objective and quantifiable data that enhances diagnostic precision while maintaining operational feasibility through standardized protocols.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 early diagnosis of rosacea, confirmation or ruling out of the condition, and differentiation between subtypes, providing a more accurate and reliable method compared to existing techniques.

Implementation Method 1

A method involving 16SrRNA sequencing or pyrosequencing is used to analyze the microbiota associated with Demodex mites

Methodology Applied

Scientific Effect16S rRNA sequencing:

Implementation Method 2

A method involving 16SrRNA sequencing or pyrosequencing is used to analyze the microbiota associated with Demodex mites

Methodology Applied

Scientific EffectPyrosequencing: Pyrolysis

Data Source

PatentUS10125400B2Method for the diagnosis of rosacea

Publication Date: 2018.11.13 GALDERMA RESEARCH & DEVELOPMENT SNC

AI summary

A method of characterizing specific microbiota associated with Demodex mites from a rosacea patient is described. The method can include a step of realizing a biopsy on the patient and analyzing the microbiota based on a method of 16SrRNA sequencing or pyrosequencing. A method for the diagnosis of rosacea in a patient is also described. This method can include characterizing microbiota associated with Demodex mites in the patient. Also described, are methods of differentiating a subtype of rosacea in a patient with rosacea and methods of controlling and measuring an active agent's treatment effectiveness on rosacea.