Semliki Forest virus and Sindbis virus vectors

Area of Science:

• Virology
• Molecular Biology
• Neuroscience

Background:

• Alphaviruses like Semliki Forest virus (SFV) and Sindbis virus (SIN) are positive-strand RNA viruses.
• SFV and SIN vectors are established tools for high-level foreign gene expression in vitro and in vivo.
• Efficient methods for generating and utilizing these viral vectors are crucial for biological research.

Purpose of the Study:

• To provide detailed protocols for the preparation and application of SFV and SIN replicons.
• To enable high-level expression of foreign genes in various biological systems using alphavirus vectors.
• To facilitate research in neuroscience through infection of neuronal cultures and brain slices.

Main Methods:

• Co-electroporation of helper and vector RNA into baby hamster kidney (BHK)-21 cells to produce packaged SFV and SIN replicons.
• Activation of packaged SFV replicons using a-chymotrypsin.
• Infection of hippocampal slices and primary cultures of dispersed neurons with infectious SFV and SIN replicons.
• Alternate protocol for cotransfection of in vitro-transcribed vector and helper RNA into BHK-21 cells.
• Support protocols for determining replicon stock titers and metabolic labeling of infected cells.

Main Results:

• Established protocols for generating infectious SFV and SIN replicons.
• Demonstrated successful infection of neuronal cells and hippocampal slices.
• Provided methods for titering and analyzing replicon stocks and infected cells.

Conclusions:

• The described methods offer robust protocols for utilizing SFV and SIN replicons for gene expression studies.
• These alphavirus-based systems are versatile tools for molecular biology and neuroscience research.
• The protocols facilitate efficient gene delivery and expression in complex neuronal systems.