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Infectious rabies viruses from cloned cDNA
M J Schnell1, T Mebatsion, K K Conzelmann
1Institute of Clinical Virology, Federal Research Centre for Virus Diseases of Animals, Tübingen, Germany.
The EMBO Journal
|September 15, 1994
Summary
Scientists generated infectious rabies virus (RV) entirely from cloned DNA. This breakthrough enables genetic manipulation of RV and other viruses, aiding research and vaccine development.
Area of Science:
- Virology
- Molecular Biology
- Genetics
Background:
- Rabies virus (RV) is a non-segmented negative-stranded RNA virus.
- Understanding RV genetics is crucial for rabies control and vaccine development.
Purpose of the Study:
- To describe the generation of infectious RV entirely from cloned cDNA.
- To explore the possibility of manipulating the RV genome for research and vaccine design.
Main Methods:
- Simultaneous intracellular expression of RV antigenome and viral proteins from transfected plasmids.
- Recovery and characterization of infectious RV from modified cDNA.
- Genetic manipulation of the RV genome, including deletion of non-translated regions.
Main Results:
- Infectious RV was successfully generated from cloned cDNA.
- Novel infectious RVs with altered transcription patterns were recovered.
- Deletion of the non-translated pseudogene region did not affect viral propagation.
- Introduction of an extra cistron border led to transcription of additional mRNA.
Conclusions:
- The RV genome can be manipulated using recombinant DNA techniques.
- Non-essential genetic material may exist in non-segmented RNA virus genomes.
- This methodology facilitates RV genetics research, host interaction studies, and pathogenesis investigation.
- The described procedure provides a tool for designing novel live rabies vaccines.