via Pacific Northwest National Laboratory
New study maps algae’s antiviral potential along infection pathway, finds promise at every step
What followed was a deep dive into the literature linking algae and antivirals as far back as 1956. To make sense of the data, PNNL Science Undergraduate Laboratory Internships intern Daman Reynolds sorted the studies along the timeline a virus follows when it causes an infection. As he did, it became apparent that compounds in algae demonstrate exceptional—and as yet fully untapped—potential to combat viral diseases.
“The vast majority of algae compounds are in the early stages of research,” said Reynolds. “A few compounds are in various degrees of clinical trials, and there are some marketed in Europe as nasal sprays to protect the respiratory system from the common cold. There were a few that were only cited once, so the exciting thing is there could be thousands more compounds that could fight viruses we don’t even know about yet.”
Prevention along the pathway
Coronavirus enters via the mouth or nose into the respiratory system, but other viruses spread through skin-to-skin or intravenous contact. Reynolds’s literature review found a host of algae-derived compounds that can serve as guardians at the gates of potential viral infection routes. Certain compounds have been shown to provide a sort of protective coating to keep the virus from entering the body.
But if, by chance, a virus does enter a host, algae-derived compounds have been shown in the laboratory to inactivate or degrade viruses.
Several preliminary laboratory studies have also shown algal products prevent viruses from adhering to cell receptors to make it harder for a virus to enter or infect a host cell.
Some laboratory research also showed that compounds from algae made it more difficult for the virus to hack the cell’s internal machinery and begin replicating. In addition, compounds in algae have also been shown to act as barriers that trap replicated viruses, so they aren’t released into the body to spread further. And algae-derived compounds can augment the body’s natural immune response to viral infection—both before and after exposure.
Possible contributions to affordable biofuels
Biologist Scott Edmundson, who has studied photosynthetic algal cultivation for bioproduct generation for more than 15 years, suggests that if algae-derived antivirals show promise in clinical trials, their extraction could help make biofuels more economically feasible.
“We’ve proved it is technically feasible to make advanced fuels from algae grown on sunshine and CO2 from the atmosphere,” he said. “Making the process work economically is the next step.”
A therapeutic compound that could be extracted before the algae is processed for biofuel would be a step in that direction.
Original Article: Fighting Viruses with Algae
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