Is human cryopreservation possible ?

[Hydromonke]

Cryonics  is the low-temperature freezing (usually at −196 °C or −320.8 °F or 77.1 K) and storage of a human corpse or severed head, with the speculative hope that people will be able to be revived  through advanced biotechnology in the future. Is this procedure possible and is there any reason to believe that it will be possible to revive people who were cryopreserved ?

 

 

[Bufofrog]

31 minutes ago, Hydromonke said:

Is this procedure possible and is there any reason to believe that it will be possible to revive people who were cryopreserved ?

No.  If you freeze a dead person, you will have a frozen corpse, if thaw it you will have a warm corpse.  Maybe, possibly, there is an outside chance that in the future there may be a technology to freeze a living person and revive them later.  Currently, freezing a living person is called murder.

[Hydromonke]

18 minutes ago, Bufofrog said:

No.  If you freeze a dead person, you will have a frozen corpse, if thaw it you will have a warm corpse.  Maybe, possibly, there is an outside chance that in the future there may be a technology to freeze a living person and revive them later.  Currently, freezing a living person is called murder.

Are we anywhere near that ? 

[Sensei]

You will be more lucky to search for experiments performed on animals.

https://www.google.com/search?q=cryogenic+experiments+on+animals

The main problem is that water molecule in solid state has a smaller density than when it is in liquid state. This means that after temperature is lowered the same amount of water inside of cell is taking more space, and causes microscopical damages. After unfreezing cells are shattered and unable to work correctly.

There are some animals which can survive freezing and unfreezing processes. They are genetically adapted to do so. Even quite big one like wood frog.

https://en.wikipedia.org/wiki/Wood_frog

Biotechnologists/geneticists could try to identify which genes are responsible for it in the wood frog and attempt to transfer them to other animals.

Edited December 8, 2020 by Sensei

[Hydromonke]

2 hours ago, Sensei said:

You will be more lucky to search for experiments performed on animals.

https://www.google.com/search?q=cryogenic+experiments+on+animals

The main problem is that water molecule in solid state has a smaller density than when it is in liquid state. This means that after temperature is lowered the same amount of water inside of cell is taking more space, and causes microscopical damages. After unfreezing cells are shattered and unable to work correctly.

There are some animals which can survive freezing and unfreezing processes. They are genetically adapted to do so. Even quite big one like wood frog.

https://en.wikipedia.org/wiki/Wood_frog

Biotechnologists/geneticists could try to identify which genes are responsible for it in the wood frog and attempt to transfer them to other animals.

Wouldn't transfering those genes in adults  animals likely kill them or be ineffective ?

[Sensei]

21 minutes ago, Hydromonke said:

Wouldn't transfering those genes in adults  animals likely kill them or be ineffective ?

Not necessarily. There are ways to introduce genetic material to adult organisms. e.g. specially prepared viruses.

https://en.wikipedia.org/wiki/Vectors_in_gene_therapy

https://en.wikipedia.org/wiki/Gene_delivery

..but in the previous post, I was thinking about transfer of genes to embryo cell, to have entire organism with changed genes since the beginning..

[Hydromonke]

14 minutes ago, Sensei said:

Not necessarily. There are ways to introduce genetic material to adult organisms. e.g. specially prepared viruses.

https://en.wikipedia.org/wiki/Vectors_in_gene_therapy

https://en.wikipedia.org/wiki/Gene_delivery

..but in the previous post, I was thinking about transfer of genes to embryo cell, to have entire organism with changed genes since the beginning..

Huh That's interesting Would this likely succeed in adult humans ?

Edited December 8, 2020 by Hydromonke