Thursday, December 20, 2012
This week in techniques
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mRNA vaccines to prevent
influenza A infection
Vaccination with a mixture
mRNAs could help prevent influenza A infection. A mixture of
protamine-complexed mRNA was formulated that could be stored for three weeks
without loss of efficacy. In both newborn and aged mice, immunization with a
vaccine containing influenza A virus hemagglutinin and influenza
A virus neuraminidase mRNAs resulted in 100% survival against a
lethal influenza virus challenge and no signs of infection, whereas
immunization with a control antigen led to 0% survival. In pigs, immunization
with a related mRNA vaccine that also contained influenza
A virus nucleoprotein (NP)
mRNA prevented signs of clinical disease following influenza virus challenge,
whereas immunization with a control antigen did not. Next steps include
studying the long-term protection conferred by this vaccine approach.
has mRNA-based vaccines in preclinical development to prevent undisclosed
infections (see Translating mRNA vaccines, page 1).
Published online Dec. 20, 2012
Patented; Sanofi has an exclusive option to
develop vaccines for predefined, undisclosed pathogens; additional
indications available for partnering
Petsch, B. et al. Nat.
Biotechnol.; published online Nov. 25, 2012;
Contact: Lothar Stitz, Friedrich Loeffler Institute,
Greifswald-Insel Riems, Germany
Contact: Karl-Josef Kallen, CureVac GmbH, Tubingen, Germany
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