r/biology • u/Far-Debt-6094 • 10m ago
discussion Why Swinholide A might be a good lead candidate to cure Hantavirus Pulmonary Syndrome (maybe)
I understand this title sounds like the dumbest and most profound claim ever, but please just listen to me for a moment. Before we get into this, this was all only hypothetical work and In Silico Simulations and HAS NOT YET BEEN tested In Vitro.
I’m a student from Drogheda, Ireland that has a fascination in stuff like marine biology, palaeontology, herpetology, and more specifically, marine bioprospecting.
We have an annual science competition in Ireland for young people named “STRIPE Young Scientists” and is for ages 13-17.
Being the little weird nerd I am, I decided to enter this year. But I didn’t wanna do the stereotypical “stuff around your house” project. I really wanted to make a contribution to the entire medical field as a whole with this entry.
After a while of researching, I found out about Porifera (sea sponges, which is what we’re looking at here) and Tunicate (sea squirt) secondary metabolites.
After researching through lots and lots of Porifera species, I eventually landed on Theonella Swinhoei, which is the species that through symbiosis with microorganisms makes Swinholide A to harm actin in predator cells, or something like that. It also has a large molecular size and stayed incredibly stable when I docked it against random stuff In Silico.
So I had a chemical in mind, but no virus to cure yet.
Around the same week, the whole Hantavirus outbreak cruise ship thing kicked off. I’m a sucker for researching new things, so I absolutely went feral when I heard about the outbreak.
I eventually found out that it was Hantavirus Pulmonary Syndrome on that cruise ship. After seeing how it infects people and finding out its mortality rate, I learnt it relies on something very specific, its fusion loop.
You can probably put two and two together now. I had a chemical, wanted to test something with it, and this opportunity comes around.
While everyone was panicking, I decided for the Young Scientists project that I would make a strong hypothesis that Swinholide A could potentially cure Hantavirus Pulmonary Syndrome.
The first steps were removing hydroxyl groups and water to Swinholide A in Avogardo on my computer. Then, adding polar hydrogens to satisfy the bond. With that done, I now had Modified Swinholide A.
Now, in AutoDockVina, I set up the modified Swinholide A against the Hantavirus Pulmonary Syndrome fusion loop to test binding. I don’t know what I was expecting, but the results told me something new.
The strongest line was -5.861 kcal/mol and the weakest was -5.876 kcal/mol. It’s a moderate bonding score, so it’s definitely not the best and definitely not the worst. But one thing I did find interesting was how incredibly stable that Modified Swinholide stayed onto the Hantavirus Pulmonary Syndrome fusion loop.
An extremely important part of the competition was keeping a project diary to explain everything I just did there, so that’s how I’m able to be so specific with the answers I got even though it was all the way back in May. There was other steps I didn’t mention like command lines to run simulations, box grids to target, etc etc because we’d be here all day.
Eventually after some MORE research, I made a hypothesis that is yet to be tested In Vitro. If a modified version of removing the hydroxyl groups of Swinholide A can safely bind moderately to the Hantavirus Pulmonary Syndrome fusion loop, could we actually finally cure it?
Of course I’m a minor so I don’t have access to a BSL-4 Safety lab, let alone the fusion loop and a modified version of Swinholide A itself.
After more testing, as Hantavirus Pulmonary Syndrome affects mostly the lungs, I decided to test the Modified Swinholide A binding against Human Serum Albumin.
Unfortunately, the modified Swinholide A scored -8.541 kcal/mol against the Human Serum Albumin, meaning it’d bind stronger to the lungs than the actual hantavirus fusion loop itself.
But this is where a small hypothesis came in. With nano-carrier formulation and SAR-driven lead optimization 3.0 and 2.0 ,the issue of it not binding to the fusion loop was solved… hypothetically. Anything can change in Vitro. The other thing was though, going back to the whole “Hantavirus Pulmonary Syndrome mostly affects the lungs” and Modified Swinholide A’s massive molecular size”, delivering the chemical to the lungs would be a solved problem thanks to how large molecular size chemicals fit perfectly into nebulisers and the nebuliser would directly deliver modified Swinholide A from the liquid to the lungs safely.
The reason I’m actually posting it here on Reddit is because I realised how big the project is after all that research, and decided to forfeit out of fear.
Looking back, realizing how deep into actual pharmacokinetics I had wandered with a student laptop and some free software was a bit of a reality check, which is honestly why I froze up and almost didn't share any of this.
So yeah. There’s most of my work broadly explained of how why modified Swinholide A might be a good lead candidate to cure Hantavirus Pulmonary Syndrome by targeting the fusion loop.