Engineered HIV-1 Variants for Owl Monkey Infection Models

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Solution Overview

Problem

Existing animal models for HIV-1/AIDS, such as macaque and rodent models, have limitations in accurately replicating key aspects of human HIV-1 infection, particularly in vaccine development, due to incomplete immunogenic payload and delivery system optimization.

Innovation Solution

Development of an immune-competent animal model using owl monkeys (Aotus nancymaae) infected with genetically modified HIV-1 variants, including mutations in the capsid peptide and replacement of the viral infectivity factor (Vif) gene with simian immunodeficiency virus (SIVVif), enabling reliable HIV-1 replication and recapitulating human infection landmarks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing animal models (macaque and rodent) are used for HIV-1 research, then research can be conducted with available models, but the models fail to accurately replicate key aspects of human HIV-1 infection and immunogenic response

Engineering Contradiction:

Improveaccuracy of replicating human HIV-1 infectionVSAvoidcompleteness of immunogenic payload

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent modifies specific parameters of the HIV-1 virus to enable infection of owl monkeys. This includes introducing mutations in the capsid peptide (positions 87-93) to bypass TRIMCyp restriction and replacing the Vif gene with SIVVif to counteract APOBEC3G restriction. These parameter changes in the viral genome allow the virus to replicate effectively in owl monkeys while maintaining human HIV-1 immunogenicity, thus resolving the contradiction between model reliability and immunogenic completeness.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If HIV-1 is modified to infect owl monkeys (capsid mutations and Vif replacement), then reliable HIV-1 replication is achieved, but the virus requires genetic modification

Engineering Contradiction:

ImproveHIV-1 replication capability in owl monkeysVSAvoidgenetic modification complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts and replaces specific problematic viral components with modified versions. The native Vif gene is extracted and replaced with SIVVif, and the capsid peptide sequence is extracted and modified at specific positions (87-93). This targeted extraction and replacement approach minimizes the extent of genetic modification needed while achieving reliable replication in owl monkeys.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses SIVVif as an intermediary component to bridge the compatibility gap between HIV-1 and owl monkey cells. SIVVif acts as a mediator that enables HIV-1 to overcome the APOBEC3G restriction in owl monkeys without requiring extensive modification of the entire viral genome, thus reducing overall modification complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If owl monkeys are used as the animal model, then accurate replication of human infection landmarks is achieved, but the model system requires establishment and validation

Engineering Contradiction:

Improvereplication of acute infection, seroconversion, and latent reservoir establishmentVSAvoidease of establishing the model system

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent performs preliminary genetic modifications to the HIV-1 virus in advance, creating a pre-adapted virus strain that is ready for owl monkey infection. The capsid mutations and Vif replacement are accomplished before animal studies begin, allowing the model system to be established more easily. This preliminary virus preparation work eliminates the need for complex adaptive procedures during the actual animal studies.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250304923A1Novel HIV-1 Variants And Their Methods Of Use In An Animal Challenge Model

Publication Date: 2025.10.02 THE REGENTS OF THE UNIVERSITY OF COLORADO

AI summary

Genetically modified HIV-1 variants capable of infecting owl monkeys that includes one or more novel point mutations coupled with the replacement of the viral infectivity factor (Vif) gene.