E regrow teeth like SHARKS? Humans still have genes used by predatory


Human teeth could eventually be made to regrow just like those of sharks as we still possess the same genes that allow regrowth, scientists have found.

Sharks and other fish regrow their teeth repeatedly through their lives while humans have the capacity to regrow their teeth just once.

But now scientists at the University of Sheffield have discovered that the same network of genes that allow sharks to regrow teeth is present in humans.

The same genes have been retained over 450 million years of evolution – when humans and sharks had a common ancestor - and mean we have the capability to regrow our teeth if a way can be found to switch these genes on.

Dr Gareth Fraser and colleagues analysed the teeth of catshark embryos, and identified the genes involved during stages of early shark tooth formation.

These genes continue to be used to grow further teeth and are found in cells called the dental lamina, which are responsible for the lifelong continuation of tooth development and regeneration in sharks.

The same genes are still present in humans - deriving from the time when humans and sharks had a common ancestor.

Dr Fraser, whose research has been published in Developmental Biology, said: 'Sharks can regenerate their teeth throughout their lives.

'The good news for us as humans is the genes that make these teeth regrow are shared by all vertebrates [creatures with skeletons] including humans.

'What it means is because we have the same genes to make teeth, we also have a regenerative program.

'We make two sets of teeth, but humans need more teeth, whether through loss or damage, so our second set are really quite valuable.



I hope this comes in my lifetime!!!

Its amazing this type of gene was found in our DNA, I wonder what else is hiding away in there, just waiting for us to come along and figure out ways to ‘turn it on’? That could really change us as a species.


There are a number of studies going on right now attempting to grow teeth from stem cells. One has been successful in rats. It would be a wonderful option for me to offer my patients. Unfortunately, it won’t be affordable to everyone in my lifetime.


It’s a very interesting article, because there are all sorts of dormant elements in the human genome. It’s believed that prehistoric man, for instance, was capable of manufacturing endogenous vitamin C, which alone would make us virtually disease free, and might very well dramatically lengthen our life span. Who knows what sorts of superhuman abilities we might have the possibility to one day awaken?


Genetics is so very fascinating! :smiley:

I love it… :slight_smile:


Anyone who has studied biology is familiar with the work of Ernst Haeckel, the German naturalist and biologist who proposed the recapitulation theory (ontogeny recapitulates philogeny), that is, all embryos whether fish, reptile, bird, mammal and even humans are identical in the first stages, complete with gill slits and a tail. While we all develop differently, we still retain certain characteristics of our earlier ancestors, usually resulting in vestigal (useless) organs and appendages. Men have nipples because during the developmental stage of a fetus every child starts out female, and the testosterone level determines whether it will be male or remain female. My younger brother was born with half a row of supernumerary teeth, about 3 or 4 of them which he kept until about the time he hit puberty. Given all the changes we go through from conception to childbirth, it should be no surprise that we still retain certain characteristics of the lower species.


That would be wonderful! I have a GI condition that I believe contributed to poor dental health. It would be nice to regrow teeth that have been damaged and lost.

Of late I’ve been reading about the work of Dr. Robert Becker. He was a bone growth specialist working for the VA. Dr. Becker wondered why it was that humans were so poor at regenerating damaged parts of the body. Many animals are able to regrow limbs and organs. Humans are only able to regenerate broken bones and when young regrow the top of the index finger. What he learned in experiments is that electrical voltage signals healing and programing. He also discovered that any body part can be regrown and healed in a proper setting.

His research work has been helpful in promoting bone healing ideas used today. Unfortunately, much of the rest of his regeneration healing work has been ignored by the medical community.

Dr. Becker wrote a book about his research findings and roadblocks he encountered. Along with the electrical signaling system for healing and programing, I thought Dr. Becker also proposed an interesting, and likely possible theory on the cause of several types of cancer.

“The Body Electric: Electromagnetism And The Foundation Of Life”


The Body Electric tells the fascinating story of our bioelectric selves. Robert O. Becker, a pioneer in the filed of regeneration and its relationship to electrical currents in living things, challenges the established mechanistic understanding of the body. He found clues to the healing process in the long-discarded theory that electricity is vital to life. But as exciting as Becker’s discoveries are, pointing to the day when human limbs, spinal cords, and organs may be regenerated after they have been damaged, equally fascinating is the story of Becker’s struggle to do such original work. The Body Electric explores new pathways in our understanding of evolution, acupuncture, psychic phenomena, and healing.


It is very interesting.

Along the same lines, I remember reading some things years ago about how they said they found ‘unused’ genes in certain birds that go back to the dinosaurs, and they felt they could turn these on and create a type of ‘dinosaur’, but it would really be an ostrich with unused genes activated.

I think they were trying to do the same thing with elephants in trying to eventually create a mammoth, but said it would take 5 generations before the offspring was primarily a mammoth.


I’m not sure how “unused” they are.

I personally grew six additional teeth. Unfortunately, four of them were extra wisdom teeth in a jaw not really big enough to accommodate eight of them.

I was told by the oral surgeon that, among Australian aborigines, having eight wisdom teeth is more the norm than the exception.

I realize that’s not the same as a whole new set after one set wears out, but regardless, there is a certain amount of “scatter” in our genes, it seems, quite naturally.


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