Natural Health News — Folk medicines and herbal products have been used for millennia to combat a whole range of ailments, at times to the chagrin of modern scientists who have struggled to explain their medicinal benefits.
However, a recent study by a group of researchers from the University of Sydney’s Faculty of Engineering and IT has determined exactly how a popular ancient remedy, the elderberry fruit, can help the fight against influenza.
Otherwise known as Sambucus nigra, the black elderberry is a small, antioxidant rich fruit common to Europe and North America that is still commonly consumed as a jam or wine. For medicinal benefits, elderberry extract is available commercially in tablet or syrup form.
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A direct anti-viral effect
The researchers study showed that compounds from elderberries can directly inhibit the virus’s entry and replication in human cells, and can help strengthen a person’s immune response to the virus.
Although elderberry’s flu-fighting properties have long been observed, the group performed a comprehensive examination of the mechanism by which phytochemicals from elderberries combat influenza infections.
“What our study has shown is that the common elderberry has a potent direct antiviral effect against the flu virus,” said Dr Golnoosh Torabian, from the University of Sydney’s Chemical and Biomolecular Engineering unit.
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“It inhibits the early stages of an infection by blocking key viral proteins responsible for both the viral attachment and entry into the host cells.”
The researchers used commercially farmed elderberries which were turned into a juice serum and were applied to cells before, during and after they had been infected with the influenza virus.
The influenza virus is one of the leading causes of mortality worldwide, affecting nearly 10 per-cent of the world population and contributing to one million deaths annually.
According to interim estimates 1 released by the U.S. Centers for Disease Control and Prevention (CDC) on February 15, 2019 — which uses data from 3,254 adults and children enrolled in the U.S. Influenza Vaccine Effectiveness Network between November 23, 2018, and February 2, 2019 — the overall adjusted effectiveness of the 2018-19 flu vaccine against all influenza virus infection associated with acute respiratory illness (ARI) needing medical attention was 47 percent.
The phytochemicals from the elderberry juice were shown to be effective at stopping the virus infecting the cells, however to the surprise of the researchers they were even more effective at inhibiting viral propagation at later stages of the influenza cycle when the cells had already been infected with the virus.
“This observation was quite surprising and rather significant because blocking the viral cycle at several stages has a higher chance of inhibiting the viral infection,” explained co-author Dr Peter Valtchev.
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“In addition to that, we identified that the elderberry solution also stimulated the cells to release certain cytokines, which are chemical messengers that the immune system uses for communication between different cell types to coordinate a more efficient response against the invading pathogen,” said Centre Director, Professor Fariba Deghani.
The team also found that the elderberry’s antiviral activity can be attributed to its anthocyanidin compounds – phytonutrients responsible for giving the fruit its vivid purple colouring.
It's unknown whether the increase in cases of AFM is in any way related to provocation poliomyelitis, vaccine-associated polio or another cause entirely, but the CDC, rather than exploring all potential possibilities, is still recommending practicing " … disease prevention steps, such as staying up-to-date on vaccines, washing your hands and protecting yourself from mosquito bites," as the current solution.
The study was published in the Journal of Functional Foods.