Composite Helper Genes for High-Yield AAV Vector Production
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Solution Overview
Problem
Existing methods for producing adeno-associated virus (AAV) vectors, such as those using adenovirus as a helper virus, face challenges in achieving high yields.
Innovation Solution
Incorporation of specific virus-derived genes, including adenovirus and herpesvirus-derived genes associated with replication, into producer cells to enhance AAV vector production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adenovirus is used as a helper virus to produce AAV vectors, then AAV vector production can be achieved, but the yield of AAV vectors is insufficient
Solution Approach 1:
The patent combines adenovirus-derived helper genes (E1A, E1B, E2, E4, VA) with herpesvirus-derived replication genes (UL5, UL8, UL29, UL30, UL42, UL52) into a composite helper system. This merging of two different viral gene systems creates synergistic effects that significantly enhance AAV vector yield beyond what either system can achieve alone.
Solution Approach 2:
The invention creates a composite genetic system by integrating multiple virus-derived genes into the producer cells. This composite approach combines the helper functions of adenovirus with the replication capabilities of herpesvirus, resulting in a enhanced production system that overcomes the yield limitations of using adenovirus alone.
2Productivity
If traditional adenovirus helper system is used, then AAV vector production is possible, but production efficiency is low
Solution Approach 1:
The patent fundamentally changes the genetic parameters of the helper system by introducing herpesvirus-derived replication genes (DNA polymerase, helicase, primase, ssDNA-binding protein) to the traditional adenovirus helper system. This parameter change in the molecular composition of the helper system dramatically improves production efficiency and vector yield.
Solution Approach 2:
The combined helper system performs multiple functions simultaneously: the adenovirus-derived genes provide early infection and transcription functions, while the herpesvirus-derived genes provide DNA replication functions. This multi-functional helper system resolves the productivity-quantity contradiction by coordinating diverse viral functions for enhanced AAV production.
Data Source
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AI summary
The present disclosure provides a virus-derived gene that can be used for producing a novel virus-derived construct. More particularly, the virus-derived gene of the present disclosure includes a combination of an adenovirus-derived gene and a herpesvirus-derived gene. In one embodiment, the herpesvirus-derived gene is a gene associated with replication of a gene. In one embodiment, the herpesvirus-derived gene encodes a protein selected from a helicase, a primase, an ssDNA-binding protein (DBP), a DNA polymerase, and a DNA replication protein. In one embodiment, the herpesvirus-derived gene encodes a protein selected from an ssDNA-binding protein (DBP) and a DNA polymerase. In one embodiment, the herpesvirus-derived gene includes a gene selected from UL44, UL54, and UL57.