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Does salamander hold key to regrowing human body parts?

7:59 pm by admin Leave a Comment

Scientists who assembled the genome of a salamander renowned for its ability to regenerate body parts say the achievement could be an important step toward finding ways to regrow human body parts.

The axolotl is a salamander whose only native habitat is a lake near Mexico City.

“It’s hard to find a body part they can’t regenerate: the limbs, the tail, the spinal cord, the eye, and in some species, the lens, even half of their brain has been shown to regenerate,” said study co-lead author Randal Voss. He’s a professor at the University of Kentucky Spinal Cord and Brain Injury Research Center.

While humans and the axolotl share many genes, the salamander’s genome is 10 times larger, posing a major hurdle for genetic study.

While recent research revealed much of the genetic data for the axolotl, that information was like a pile of puzzle pieces, said co-lead author Jeramiah Smith, an associate professor of biology at the university.

That genetic puzzle had to be assembled in the right order for scientists to begin learning what gives the axolotl its remarkable powers of regeneration.

By adapting an approach called linkage mapping, Voss and Smith were able to assemble the axolotl genome quickly and efficiently, according to the study. It’s the first genome this large to be assembled.

To test their concept, researchers then used the newly assembled genetic data to identify a gene that causes a heart defect in axolotls, providing a new model of human disease.

“Biomedical research is increasingly becoming a genetically driven enterprise,” Voss said in a university news release. He added that researchers need to be able to study gene functions in other organisms in order to understand human disease.

“Now that we have access to genomic information, we can really start to probe axolotl gene functions and learn how they are able to regenerate body parts,” Voss said.

“Hopefully someday we can translate this information to human therapy, with potential applications for spinal cord injury, stroke, joint repair … the sky’s the limit, really,” he said.

The findings were published in the February issue of the journal Genome.

The Indiana University Center for Regenerative Biology and Medicine offers more on the science of regenerative medicine.

Filed Under: Health, Other News

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