4 ms·

The article is specifically about a difference in the mTOR protein, so in the end, a genetic difference. You will not trigger a limb regrowth in humans by openi

by deng 3y ago

The article is specifically about a difference in the mTOR protein, so in the end, a genetic difference. You will not trigger a limb regrowth in humans by opening and closing specific ion channels in our cells.

grishka 3y ago
> You will not trigger a limb regrowth in humans by opening and closing specific ion channels in our cells. Levin's research begs to differ. He did successfully regrow an amputated leg in a frog.
- deleted 3y ago
  [deleted]
- dekhn 3y ago
  I seem to think you're interpreting that in a way that is not consistent with our current understanding of limb regrowth. This is the paper: https://www.science.org/doi/10.1126/sciadv.abj2164 https://www.science.org/doi/10.1126/sciadv.abj2164 and it clearly states they treated a frog (xenopus, a common model organism), which does not normally regenerate when it's an adult. The paper clearly states that they treated with a set of factors that they believe induced a developmental plan- implemented by the transcription of DNA, translation of RNA, and expression of proteins. The initial treatment was removed, and the effect continued. Also there's nothing about ion channels in this- the factors they used must have been actively transported- they bind to protein receptors.
  - curioussavage 3y ago
    I’ve watched at least half a dozen long presentations and interviews from dr levin and I’d say the previous commenter is essentially repeating it exactly how Levin describes it. To be fair it’s not exact. What I understood from the interviews is that they have been imaging bioelectrical activity in organisms during development and claim to have deciphered patterns associated with growth of certain structures. He talks about a certain ion channel drug (one used for epilepsy I believe) which they used to reproduce the bioelectric field previously observed and the organism grew a leg. Multiple legs actually, wherever they wanted. Also working eyes on arbitrary locations. So from a high level they say they have figured out how to “speak” to cells in a sense and instruct them to start building certain structures. And they emphasize that they aren’t making any changes to the genome or manage any of the low level processes themselves.
    - dekhn 3y ago
      Unless you can point me to some succinct papers or summaries, I'm going to continue with my believe that the dog wags the tail, not the other way around.
- deng 3y ago
  Frogs are not humans. Amphibians do have the genetic potential for limb regrowth.

by deng 3y ago

grishka 3y ago

> You will not trigger a limb regrowth in humans by opening and closing specific ion channels in our cells. Levin's research begs to differ. He did successfully regrow an amputated leg in a frog.

deleted 3y ago
[deleted]
dekhn 3y ago
I seem to think you're interpreting that in a way that is not consistent with our current understanding of limb regrowth. This is the paper: https://www.science.org/doi/10.1126/sciadv.abj2164 https://www.science.org/doi/10.1126/sciadv.abj2164 and it clearly states they treated a frog (xenopus, a common model organism), which does not normally regenerate when it's an adult. The paper clearly states that they treated with a set of factors that they believe induced a developmental plan- implemented by the transcription of DNA, translation of RNA, and expression of proteins. The initial treatment was removed, and the effect continued. Also there's nothing about ion channels in this- the factors they used must have been actively transported- they bind to protein receptors.
- curioussavage 3y ago
  I’ve watched at least half a dozen long presentations and interviews from dr levin and I’d say the previous commenter is essentially repeating it exactly how Levin describes it. To be fair it’s not exact. What I understood from the interviews is that they have been imaging bioelectrical activity in organisms during development and claim to have deciphered patterns associated with growth of certain structures. He talks about a certain ion channel drug (one used for epilepsy I believe) which they used to reproduce the bioelectric field previously observed and the organism grew a leg. Multiple legs actually, wherever they wanted. Also working eyes on arbitrary locations. So from a high level they say they have figured out how to “speak” to cells in a sense and instruct them to start building certain structures. And they emphasize that they aren’t making any changes to the genome or manage any of the low level processes themselves.
  - dekhn 3y ago
    Unless you can point me to some succinct papers or summaries, I'm going to continue with my believe that the dog wags the tail, not the other way around.
deng 3y ago
Frogs are not humans. Amphibians do have the genetic potential for limb regrowth.