What's to prevent HIV from evolving past the protection? Strains of gonorrhea (a bacteria) has evolved to get around antibiotics. Won't that happen with HIV? Or is a virus not able to adapt?
It depends on the drug but generally the principle is trying to target a part of the virus that is so fundamental to its structure that it simply cannot adapt to function without it.
The redundancy on a bacteria is degrees higher than on viruses which are extremely efficient so they're more prepared to survive if that were to happen. But it also depends on the way you're doing the drug.
That doesn't mean virus can't adapt, they do. But if you manage to hit the right pieces it might just not be possible for them to do so fast enough. Obviously finding that particular protein and figuring out a mechanism to target it while at the same time for your drug not to have undesirable side effects on the host is an expensive, long and difficult process.
For this drug in particular, it doesn't function the same way PrEP does; this targets a different protein which previously was thought to be too difficult to target but new research on it showed that perhaps there was an easier way to do it and that's how this drug (lenacapavir) came to be. However that was not the end of the story as there was also a problem on how to actually deliver the drug to the cells as the drug is relatively insoluble and isn't easily absorbed by the body so although the drug was promising when it comes to affecting the virus it didn't seem to be possible to develop a drug that could be deliverable to people. Eventually though they did figure this part out and that's how we got where we are.
But generally, to answer your question, finding the right molecule to target; a right way to target it and a right way to deliver it is really the problem when it comes to drug development, being so targeted and specific makes it extremely unlikely for the virus to develop a resistance because it would mean it has to become a whole new virus basically.
the war on retroviruses is based on taking new approaches that aren't limited by this issue, while also slowing down existing infection long enough for your natural immune system to deal with what's there.
correct that it isn't over because of this potential, but the way this one works is by targeting the capsid
the body's immune system goes after infected cells based on the coating and signature of those cells. HIV and retroviruses replicate far too quickly for our immune system to follow along, as well as experiencing rapid selective evolution within our body that eventually in nearly all scenarios results in complete immune deficiency, where the body no longer recognizes the cells as infected because they both blend in, while another population has exhausted the immune function as the body continues to fight too many infected cells. This is the AIDS part of HIV. The iteration takes a predictable amount of time to occur, but they are convergent evolutions in everyone's body.
by targeting the capsid specifically, this is destroying the container for HIV's RNA before it gets to a cell at all
this should be an evolutionary dead end, only controversial to say because its been 44 years of this, but should gain confidence in the future
jerojero|7 months ago
The redundancy on a bacteria is degrees higher than on viruses which are extremely efficient so they're more prepared to survive if that were to happen. But it also depends on the way you're doing the drug.
That doesn't mean virus can't adapt, they do. But if you manage to hit the right pieces it might just not be possible for them to do so fast enough. Obviously finding that particular protein and figuring out a mechanism to target it while at the same time for your drug not to have undesirable side effects on the host is an expensive, long and difficult process.
For this drug in particular, it doesn't function the same way PrEP does; this targets a different protein which previously was thought to be too difficult to target but new research on it showed that perhaps there was an easier way to do it and that's how this drug (lenacapavir) came to be. However that was not the end of the story as there was also a problem on how to actually deliver the drug to the cells as the drug is relatively insoluble and isn't easily absorbed by the body so although the drug was promising when it comes to affecting the virus it didn't seem to be possible to develop a drug that could be deliverable to people. Eventually though they did figure this part out and that's how we got where we are.
But generally, to answer your question, finding the right molecule to target; a right way to target it and a right way to deliver it is really the problem when it comes to drug development, being so targeted and specific makes it extremely unlikely for the virus to develop a resistance because it would mean it has to become a whole new virus basically.
yieldcrv|7 months ago
correct that it isn't over because of this potential, but the way this one works is by targeting the capsid
the body's immune system goes after infected cells based on the coating and signature of those cells. HIV and retroviruses replicate far too quickly for our immune system to follow along, as well as experiencing rapid selective evolution within our body that eventually in nearly all scenarios results in complete immune deficiency, where the body no longer recognizes the cells as infected because they both blend in, while another population has exhausted the immune function as the body continues to fight too many infected cells. This is the AIDS part of HIV. The iteration takes a predictable amount of time to occur, but they are convergent evolutions in everyone's body.
by targeting the capsid specifically, this is destroying the container for HIV's RNA before it gets to a cell at all
this should be an evolutionary dead end, only controversial to say because its been 44 years of this, but should gain confidence in the future
tonyhart7|7 months ago