Scientists create tadpoles with eyes on the tail


28/02/2013

Biologists have found that a significant distance from the brain of tadpoles does not preclude a partial recovery of the transplanted eyes. Detailed description of the results of work published in The Journal of Experimental Biology, summary reports ScieceNow.

The scientists focused on the ability of the compound of axons, the long processes of nerve cells of the eye to the central nervous system after transplantation. This ability, but in a limited way, in amphibians has already been shown, but it was unclear how far the axons are able to germinate.

The experiment involved the transplantation of blind tadpoles clawed frog Xenopus laevis eye to different parts of the body, and further research is the extent of their functionality after a recovery period. Test the functionality provided for the use of light of different wavelengths. Guinea tadpole researchers placed in a Petri dish illuminated with red on one side, and on the other - blue. If the amphibian falls within the red portion of the cup, it deterred small electric discharge.

Most of the fry were found to distinguish the free red and blue light, even when their eyes were transplanted to the tail. Scientists have discovered that these animals axons of neurons sprout eyes to the spinal cord, gradually restoring sensitivity to light.

A person with this ability to regenerate, unlike amphibians, does not, scientists stressed. Meanwhile, the underlying mechanisms of axon growth must be the same in vertebrates, giving scientists hope for the right opportunity to stimulate this process in view of deprived people.


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