Mapping the Resistance Potential of Influenza's H+ Channel against an Antiviral Blocker

Influenza is a viral infection that is constantly changing. It has not been discovered yet the exact way that viral infections like these are becoming drug resistant without waiting for new and untreatable strains arise. Using a novel genetic screen, researchers at the University of California  have mapped out the resistance options of influenza's M2 channel against its anti-viral medication inhibitors. This allows the clinically known resistant mutations to be identified without contamination from outside sources. This led to novel mutations that were known to exist in viruses but not to be drug resistant. The same methods were used against a drug that has not been put out on the market yet for clinical use. This enabled the researchers to identify more new resistance mutations. This research will allow new antiviral agents to be tested to predict the resistance options before clinical use.


Read more at: http://www.sciencedirect.com/science/article/pii/S0022283616303023

Construction and Rescue of a Molecular Clone of Deformed Wing Virus (DWV)

The problem of honey bees being endangered has been brought to light a lot more in social media and the news lately. Honey bees are extremely important in the agriculture business and human nutrition. Deformed wing virus (DWV) is playing a major role in the colony mortality but not much is known about this virus. This virus comes from Varroa jacobsoni mite infestations which has been spread to every continent but Australia due to colony trade. The University of Vienna is trying to close the gap between field research and lab findings to complete an in-vitro model. At this point, colony survival depends on close supervision and help. Once a colony shows DWV symptoms, the colony is more than likely going to fail. DWV can lead to crippled wings and discoloration. A genomic sequence of DWV has been known since 2006 but there are a limited number of tools that are available for studying bee viruses in the lab. The researchers took infectious DWV from a molecular clone that produces DWV symptoms. Through newly made anti-AWV monoclonal antibodies, expression of DWV proteins, producing the virus' progeny, and host cell tropism could be confirmed. Koch's postulates were fulfilled so the virus did not need to be isolated and purified. From this research, a reverse genetics system was developed and applied for DWV pathogenesis. This provides a new basis to study the unknown aspects of DWV along with the molecular mechanisms behind transmission. This study covered the preliminary background needed to continue research to hopefully find a way to minimize the transmission of DWV before honey bees become extinct.

Scientists Find Key Protein For Spinal Cord Repair

Zebrafish have the ability to heal their own spinal cord after it has been severed which is definitely not something humans are capable of. Researchers at Duke found the specific protein that plays a major role in this process. This discovery can be a major one towards applying it to people. When the fish's spinal cord is severed, a bridge is formed. First wells extend and connect the gap then nerve cells follow. By 8 weeks the injury is completely healed and the fish has its normal capabilities again. To determine which genes were changed, the scientists monitored the activity of the genes that had large changes once damage was done to the spinal cord. CTGF or connective tissue growth factor is a gene coded for proteins that is secreted from cells. The levels of this rose in the cells that formed the bridge. When CTGF was deleted, the fish were not able to regenerate. The human CTGF protein is extremely similar (almost 90%) in the amino acid make up to the zebra fish. When human CTGF was added to the fish, regeneration was faster. Since healing is more complex in mammals due to the scar tissue, the scientists do not think CTGF alone is sufficient enough to regenerate in people. The next step mice and when the CTGF levels are the highest. At this point, the scientists are believing that it is how the protein is controlled and not the actual make up.

Read more at: https://today.duke.edu/2016/11/scientists-find-key-protein-spinal-cord-repair