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Infectious measles virus from cloned cDNA
I Ballart1, D Eschle, R Cattaneo
1Institut für Molekularbiologie I, Universität Zürich, Switzerland.
The EMBO Journal
|February 1, 1990
Summary
Researchers created infectious measles virus (MV) from cloned DNA, enabling genetic manipulation. This breakthrough allows studying negative-strand RNA viruses like MV with advanced genetic tools.
Area of Science:
- Virology
- Molecular Biology
- Genetics
Background:
- Studying measles virus (MV) and negative-strand RNA viruses has been limited by the absence of genetic manipulation systems.
- Existing methods do not allow for comprehensive genetic analysis of these important viral families.
Purpose of the Study:
- To develop a novel experimental system for generating infectious measles virus (MV) from cloned cDNA.
- To enable genetic manipulation of MV, facilitating deeper understanding of negative-strand RNA viruses.
Main Methods:
- Assembled a genetically marked DNA copy of the MV genome in plasmids.
- Produced transcripts using phage T3 or T7 promoters and specific polymerases.
- Microinjected transcription complexes into helper cells for virus rescue and replication.
Main Results:
- Successfully generated infectious, lytic measles viruses (MVs) from cloned cDNA.
- Confirmed the presence of genetic tags in the rescued MV transcripts via sequencing.
- Demonstrated a reproducible method for MV recovery and genetic analysis.
Conclusions:
- The developed procedure provides the first experimental system for genetic manipulation of measles virus (MV).
- This breakthrough extends the application of genetic tools, previously limited to positive-strand RNA viruses and retroviruses, to negative-strand RNA viruses.
- Facilitates in-depth analysis of MV and other negative-strand RNA viruses, advancing virological research.