Constant-Current Electroporation for DNA Plasmid Delivery

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current DNA vaccine delivery methods, particularly using constant voltage electroporation, result in suboptimal plasmid expression and immune responses, leading to low levels of antigen-specific antibodies and T-cell immunity, which is inadequate for effectively addressing diseases such as HIV and cancer.

Innovation Solution

Employing constant-current electroporation technology that adjusts electrical pulses based on tissue resistance to efficiently deliver DNA plasmids, ensuring optimal antigen expression and immune response generation by maintaining a constant current throughout the electrical pulse.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If constant voltage electroporation is used to deliver DNA plasmids, then electrical delivery is achieved, but plasmid expression and immune response are suboptimal due to tissue resistance variations

Engineering Contradiction:

Improveplasmid expressionVSAvoidtissue resistance adaptation

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The electroporation system transitions from static constant voltage to dynamic constant current delivery, automatically adjusting electrical parameters in real-time based on tissue resistance feedback to optimize plasmid transfection across varying tissue conditions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates implicit feedback through constant current control, where the electroporation device monitors tissue resistance and dynamically adjusts voltage to maintain optimal current flow, ensuring consistent plasmid delivery despite tissue variability

Inventive Principle:

Principle #23Feedback

2Reliability

If constant voltage electroporation is used, then electrical pulse delivery is achieved, but immune response levels are low due to inefficient plasmid uptake

Engineering Contradiction:

Improveimmune responseVSAvoidplasmid uptake efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The electroporation protocol uses dynamic constant current delivery with optimized pulse parameters (amplitude, duration, number of pulses) that adapt to tissue characteristics, maximizing cellular uptake of plasmid DNA and subsequent antigen expression to elicit robust immune responses

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system optimizes multiple electroporation parameters including current amplitude (e.g., 0.5-2.0 A), pulse duration (e.g., 50-100 ms), and pulse number (e.g., 1-5 pulses) to enhance plasmid transfection efficiency and immune response while minimizing tissue damage

Inventive Principle:

Principle #35Parameter changes

3Productivity

If higher electrical pulses are used to improve plasmid delivery, then uptake increases, but tissue damage and inflammation increase

Engineering Contradiction:

Improveplasmid deliveryVSAvoidtissue damage

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The electroporation protocol applies optimized electrical pulses that deliver sufficient current to achieve effective plasmid transfection (partial action) without exceeding tissue tolerance thresholds, balancing delivery efficiency with tissue safety through controlled current amplitude and pulse duration

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The constant current electroporation system预先 sets safe operational parameters and includes real-time monitoring to prevent excessive energy delivery, cushioning against potential tissue damage before it occurs by maintaining current within biologically safe limits

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 significantly enhances antibody production and immune response, as demonstrated by increased titers and sustained antibody persistence, providing more effective protection against antigens like HIV and cancer-related proteins.

Implementation Method 1

electroporating the tissue with an electroporation device capable of delivering an electrical pulse effective to electroporate cells of the tissue to allow entry of the DNA plasmid

Methodology Applied

Scientific EffectElectroporation:

Data Source

PatentUS8927508B2Antibody production elicited by a DNA vaccine delivered by electroporation

Publication Date: 2015.01.06 INOVIO PHARMACEUTICALS INC

AI summary

There are provided methods of generating antibodies in a mammal against recombinant antigens using DNA plasmids capable of expressing said antigens in cells of said mammal, comprising: injecting into tissue of said mammal a DNA plasmid comprising an encoding sequence operably linked to a promoter, electroporating said tissue with an electroporation device capable of delivering an electrical pulse effective to electroporate cells of said tissue to allow entry of said DNA plasmid and expression of said antigen, and allowing said mammal to respond to said expressed antigen in order to generate antibodies to said antigen. Furthermore, there are provided methods of isolating antibodies specific against desired antigens wherein said antibodies are generated in a mammal using DNA plasmids capable of expressing said antigens.