MVA Virus Oil-Water Emulsion Adjuvant for Antibody Response
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Solution Overview
Problem
Current vaccination methods require multiple doses and higher antigen quantities to induce strong T-cell and antibody responses, with a need for compositions and methods to achieve effective immune responses using a single or smaller dose.
Innovation Solution
A pharmaceutical composition comprising a recombinant or non-recombinant modified vaccinia Ankara (MVA) virus in an oil and water emulsion, specifically formulated to induce a 2- to 16-fold higher level of vaccinia neutralizing antibodies, using emulsions like ISA51 or ISA720, which can be administered in a single dose to enhance immune responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple doses and higher antigen quantities are used, then strong T-cell and antibody responses are induced, but the complexity of vaccination regimen and antigen consumption increase
Solution Approach 1:
The patent changes the physical-chemical parameters of the antigen delivery system by formulating MVA in oil-in-water emulsions with specific compositions (containing surfactants, oils, and water phases). This parameter change in the formulation enables enhanced immunogenicity that achieves strong immune responses with single or reduced doses, resolving the contradiction between response strength and regimen complexity
Solution Approach 2:
The oil-in-water emulsion acts as an intermediary adjuvant system that mediates between the MVA antigen and the immune system. The emulsion components (surfactants, oils) facilitate enhanced antigen presentation and immune cell activation, enabling strong immune responses with lower antigen doses and simplified vaccination regimens
2Reliability
If multiple doses and higher antigen quantities are used, then strong T-cell and antibody responses are induced, but the quantity of antigen required increases
Solution Approach 1:
The patent modifies the formulation parameters by incorporating MVA into oil-in-water emulsions with specific surfactant and oil compositions. This formulation parameter change dramatically enhances the immunogenicity per unit of antigen, allowing strong immune responses to be achieved with significantly reduced antigen quantities compared to conventional formulations
Solution Approach 2:
The oil-in-water emulsion serves as an intermediary that amplifies the immunogenic effect of the MVA antigen. The emulsion components enhance antigen uptake, presentation, and persistence at the injection site, thereby reducing the total quantity of antigen needed to elicit strong T-cell and antibody responses
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 composition significantly increases vaccinia-specific IgG and neutralizing antibody titers, achieving immune responses equivalent to or exceeding those from multiple doses with lower antigen quantities, demonstrating enhanced immunogenicity and protective potential.
Implementation Method 1
Adjuvants can be used to increase the humoral and/or cellular immune response to the antigen. With the aid of adjuvant, a smaller dose of antigen may be required to stimulate the immune response.
Implementation Method 2
One example of a particulate adjuvant is an oil and water emulsion. For example, Freund's Complete Adjuvant is a water-in-oil emulsion composed of mineral oil mixed with killed Mycobacteria and an emulsifying agent.
Data Source
AI summary
The invention relates to compositions, uses, and methods for inducing an immune response against a vaccinia virus. The addition of an oil and water emulsion to MVA can vastly increase the B cell response and particularly neutralizing antibodies against vaccinia virus and encoded recombinant antigens. Thus, the addition of an oil and water emulsion to MVA can increase the protective immune response. The invention encompasses administering a dose of an MVA in an oil and water emulsion to an animal, especially a human.