It goes without saying how much the Covid-19 pandemic has changed our lives. Even though we are all vaccinated and somewhat protected, this virus is not going to stay away . New variants of it appear from time to time. You may remember Alpha, Beta, and the recently talked about Omicron variant. As the virus continues to mutate in this way, the current vaccines may sometimes be less effective in stopping the spread of these new infections. So in addition to this, research is being conducted around the world on other safe methods. In particular, on ways to prevent the spread of infection in crowded places like big sporting events and music concerts. That is one such research that we are going to talk about today. That is about a nasal spray that is being developed for Covid.
What is this experimental Covid nasal spray?
Although this is still in the research stage, the National Institute of Allergy and Infectious Diseases (NIAID) in the United States is conducting this research. Simply put, this is a drug that can be sprayed into the nose. So far, tests on mice have shown very successful results . So researchers believe that it has the potential to provide similar protection to humans.
Since this is still new, there isn't much information about its benefits or side effects. But researchers believe that using the spray in the nose after someone has been exposed to the virus could help prevent infection. They also believe that if the spray is used soon after exposure (within 12 hours) , it could be used as an early treatment.
In the experiment, mice were injected with human cell receptors and exposed to the Covid virus, namely the SARS-CoV-2 virus. Then, they were given a spray containing this special molecule called N-0385. It was proven that this molecule can protect mice from infection. Not only that, it has been found to be effective against not only the original Covid virus, but also its various variants .
What is the difference between existing treatments and this nasal spray?
As new strains of the COVID-19 virus emerge, the effectiveness of some existing antibody treatments is decreasing. In fact, some existing antibody treatments are not even able to control the Omicron variant. In addition, these antibody treatments are very expensive. They are difficult to manufacture, transport, and store. And they can only be administered by a doctor. For these reasons, it is difficult for low-income countries to access these treatments.
However, this new nasal spray is completely different. Check out the table below to compare it.
| Feature | Nasal Spray | Antibody Treatment |
|---|---|---|
| Price and production | It is inexpensive and can be produced using common microorganisms like E. coli. | Very expensive. Difficult to produce, transport, and store. |
| Storage | It can be kept stable even at high temperatures. | Must be stored under special refrigeration conditions. |
| How to use | You can spray it into your nose yourself. It's very easy. | It should only be given intravenously (IV) by a doctor. |
| Against the varieties | Tests have shown that it is effective against many new varieties. | Success against new variants (e.g. Omicron) is low. |
Researchers hope to soon make this nasal spray available even in regular pharmacies.
How does this nasal spray work?
To understand this, we first need to understand how the Covid virus enters our bodies. Imagine that the Covid virus is like a little ball with lots of spikes. We call these spikes spike proteins . Our body's cells have receptors that fit these spikes exactly, like a key fits a lock. When these spike proteins in the virus attach to these receptors in our cells, the virus enters the cells and makes us sick.
Current antibody treatments block these spike proteins. But as the virus mutates and new strains emerge, the shape of these spike proteins also changes slightly. Then the old treatments can't properly recognize the new shape.
However, this new nasal spray works in a different way. It doesn't target the spike protein of the virus, but the receptor on our own cells . In other words, what this spray does is temporarily close that 'lock'. Then, no matter how different the 'key' of the virus is, there is no lock to fit it. This is why we believe this method can also be successful for new strains.
Is this really successful?
In tests so far, this has been very successful in mice. When mice infected with Covid were given this N-0385 spray, 70% survived , and their lungs did not seem to be damaged. In another test, when 10 mice were given this treatment for 4 days, all 10 survived. However, only one of the 20 mice that were given a normal saline solution instead of this treatment survived.
These tests show that this is a very promising treatment. The next step is to start human trials. Once the necessary funding is received, we will be able to know exactly how safe and effective this is in humans. Therefore, we must remember that this is still in the research stage. But it has the potential to be a powerful weapon in the fight against viruses like Covid in the future.
Take-Home Message
- Research is currently underway on a nasal spray to protect against the COVID-19 virus. This is still in the research stage and has not been released for public use.
- Tests using mice have yielded very successful results, and it has worked both to prevent infection and as a treatment in the early stages of infection.
- This spray is expected to be a cheaper, easier to use, and easier to store alternative to the currently expensive and difficult to use antibody treatments.
- This works by temporarily blocking the receptors on our own cells that allow the virus to enter, rather than targeting parts of the virus. This makes it more likely to be effective against new strains of the virus.
- Only after human trials can the true success and safety of this be confirmed. Therefore, while there is hope for the future, it is very important to get the current vaccines and follow health advice.
💬 අදහස් (0)
තවමත් කිසිදු අදහසක් පළ කර නොමැත. ඔබේ අදහස පළමු වරට මෙහි එක් කරන්න.
ඔබේ අදහස එක් කරන්න