Dynamic Clamp Waveform Testing for GOF and LOF Mutation Diagnosis

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Solution Overview

Problem

Existing methods struggle to accurately determine whether mutations in ion channels or receptors are gain-of-function (GOF) or loss-of-function (LOF) phenotypes, necessitating different treatment strategies, and there is a need for effective diagnostic and therapeutic approaches tailored to these mutations.

Innovation Solution

A dynamic clamp method is employed to provide a waveform to a biological cell with a mutant ion channel or receptor, allowing for the detection of modulation relative to a control, thereby distinguishing between GOF and LOF mutations, and guiding appropriate therapeutic interventions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional methods are used to determine mutation phenotypes, then the process is simple, but the accuracy of determining GOF or LOF mutations is insufficient

Engineering Contradiction:

Improveaccuracy of mutation phenotype determinationVSAvoidcomplexity of dynamic clamp system

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent introduces a dynamic clamp system as an intermediary between the biological cell and the measurement process. This intermediary applies controlled current signals to the cell and measures the resulting voltage responses, enabling accurate determination of mutation phenotypes through standardized electrical measurements rather than direct observation of complex biological behaviors.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the measurement parameters from direct biological observation to electrical signal measurements. By applying standardized current protocols and measuring voltage responses, the system transforms the determination of GOF/LOF phenotypes into quantifiable electrical parameter analysis, significantly improving measurement precision and objectivity.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If dynamic clamp method is used to accurately determine mutation phenotypes, then diagnostic accuracy improves, but the ease of operation decreases

Engineering Contradiction:

Improvediagnostic accuracyVSAvoidoperational simplicity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent implements preliminary action by pre-programming standardized current injection protocols and response analysis algorithms into the dynamic clamp system. These pre-configured measurement sequences automatically guide the operator through the phenotype determination process, reducing the need for manual intervention while maintaining high diagnostic accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system incorporates real-time feedback mechanisms where the measured voltage responses are immediately analyzed and compared against expected patterns for GOF and LOF mutations. This automated feedback loop guides the measurement process and provides immediate diagnostic information, simplifying operation while preserving measurement precision.

Inventive Principle:

Principle #23Feedback

3Difficulty of detecting and measuring

If dynamic clamp with waveform application is used, then the ability to distinguish GOF and LOF mutations improves, but the device complexity increases

Engineering Contradiction:

Improveability to distinguish mutation typesVSAvoidcomplexity of signal generation and detection system

Core Design Contradiction:

Difficulty of detecting and measuringVSDevice complexity

Solution Approach 1:

The patent segments the measurement process into distinct phases: current injection, voltage measurement, and phenotype classification. Each phase is handled by dedicated system components, allowing the complex task of distinguishing GOF and LOF mutations to be broken down into manageable, standardized operations that reduce overall system complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses computational models to create electrical copies of expected response patterns for different mutation types. By comparing actual measurements against these pre-established reference patterns, the system can accurately distinguish between GOF and LOF mutations without requiring complex real-time analysis algorithms.

Inventive Principle:

Principle #26Copying

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

The method enables precise identification of GOF or LOF mutations, facilitating targeted treatment strategies for diseases associated with these mutations, improving diagnostic accuracy and therapeutic efficacy.

Implementation Method 1

causing the dynamic clamp to apply a signal based on modulation of the mutant ion channel in the biological cell or portion thereof, thereby providing the waveform at the biological cell or portion thereof

Methodology Applied

Scientific EffectElectrical signal modulation:

Implementation Method 2

detecting modulation of the waveform at the biological cell or portion thereof

Methodology Applied

Scientific EffectElectrical signal detection:

Data Source

PatentUS20250389712A1Dynamic clamps and methods of use thereof

Publication Date: 2025.12.25 PRAXIS PRECISION MEDICINES INC

AI summary

The present invention provides methods for determining the phenotype (e.g., gain-of-function or loss-of-function) of a mutation in an ion channel or receptor by using a dynamic voltage clamp. The invention also features methods of determining whether a mutation is a gain-of-function or loss- of-function mutation and treating a disease or disorder associated with the particular gain-of-function or loss-of-function mutation.