“Supplemental POPG could be an important, inexpensive and novel approach for the prevention and treatment of influenza and other respiratory virus infections,” said Dennis Voelker, PhD, Professor of Medicine, and senior author in the report, published online in the American journal of Respiratory Cell and Molecular Biology.
Influenza infects millions of people across the globe, killing 500,000 each year. Vaccines are highly effective, but must be reformulated each year to counter new viral strains. Two classes of drug are currently available to treat established influenza infections, although widespread resistance has developed against one class and is developing against the other.
Several proteins that inhibit viral activity have been identified in the fluid lining the lungs. Until recently, however, the antiviral role of POPG (palmitoyl-oleoyl-phosphatidylglycerol) has been unknown. Previous research by Dr. Voelker, Mari Numata, MD, PhD, and their colleagues demonstrated that POPG reduces inflammation in the lung and prevents infection by respiratory syncytial virus.
In mice, POPG also suppressed viral infection and replication, and markedly reduced the inflammatory response to the virus. There were no observable deleterious effects of POPG in animal behavior or histopathology.
“Lipids such as POPG, offer potential advantages over antiviral proteins, because they are less likely to elicit unwanted immune responses, are more chemically stable and less expensive to manufacture than proteins,” said Dr. Numata, an instructor at National Jewish Health, and lead author on both the RSV and influenza papers. “Because POPG is effective against at least two different viruses, it also seems likely that a single mutation, which can make influenza vaccines and current drugs ineffective, is unlikely to have the same effect on POPG’s action.”
The researchers showed that POPG works by binding strongly to viral particles, which prevents attachment and infection of cells. This means that POPG works best if given before an infection occurs.
It has potential, however, to work after an infection has begun by inhibiting spread of the virus to uninfected cells. The success of POPG treatment after a virus infection has been established depends on keeping the lipid levels high for an extended period. At present it is difficult to maintain high levels of POPG in mice because of their rapid metabolisms and rapid respiratory rate.
“We believe POPG may prove effective both before and after an infection has occurred,” said Dr. Voelker. “Our initial results suggest that it may be possible to maintain therapeutic levels in the body with a reasonable dosing scheme, and we are investigating that now.”
William Allstetter | EurekAlert!
One gene closer to regenerative therapy for muscular disorders
01.06.2017 | Cincinnati Children's Hospital Medical Center
The gut microbiota plays a key role in treatment with classic diabetes medication
01.06.2017 | University of Gothenburg
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
19.06.2017 | Event News
13.06.2017 | Event News
13.06.2017 | Event News
23.06.2017 | Physics and Astronomy
23.06.2017 | Physics and Astronomy
23.06.2017 | Information Technology