Properties of adeno-associated virus (type 1) replicated in rodent cells by murine adenovirus

Area of Science:

• Virology
• Molecular Biology
• Cell Biology

Background:

• Adeno-associated virus (AAV) is a small, non-pathogenic virus often used in gene therapy.
• Replication of AAV typically requires co-infection with a helper virus.
• Efficient production of infectious AAV serotypes is crucial for research and therapeutic applications.

Purpose of the Study:

• To report the first successful replication of infectious adeno-associated virus type 1 (AAV-1) in rodent cell lines.
• To investigate the use of murine adenovirus (MAV) and herpes simplex virus type I (HSV-I) as helper viruses for AAV-1 production.
• To characterize the physical properties of the produced AAV-1 virions.

Main Methods:

• Replication of AAV-1 in primary mouse kidney (PMK) and mouse L929 cells using MAV as a helper virus.
• Production of AAV-1 antigen in mouse neuroblastoma (NB) cells using HSV-I (ts 200 mutant).
• Determination of the buoyant density of infectious AAV virions using caesium chloride gradients.

Main Results:

• Successful replication of infectious AAV-1 in PMK and L929 cells with MAV.
• Production of AAV-1 antigen in NB cells using HSV-I.
• Infectious AAV virions produced by MAV in L cells exhibited a buoyant density of 1.41 g/ml in CsCl gradients.

Conclusions:

• Murine adenovirus (MAV) can serve as a helper virus for the replication of infectious adeno-associated virus type 1 (AAV-1) in rodent cells.
• Herpes simplex virus type I (HSV-I) can be used to produce AAV-1 antigen in mouse neuroblastoma cells.
• The characterization of AAV-1 virion properties provides valuable data for its use in further research.