Tasmanian Devil Immortal Devil
February 17, 2012 by staff
Tasmanian Devil Immortal Devil, About 20 years ago, a female Tasmanian devil living in northeast Tasmania developed a facial tumor. When she eventually died, she left some of her cancer cells behind. Her tumor lived on to kill another day, and has been sweeping through the endangered Tasmanian devil population ever since.
The “immortal devil girl” was identified in a new study in which researchers sequenced the genetic blueprint, or genomes, of the Tasmanian devil’s cancerous facial tumors.
“It’s a very bizarre cancer; it’s spread by living cancer cells,” study researcher Elizabeth Murchison, working with the Wellcome Trust Sanger Institute in the United Kingdom, told LiveScience. “The contagious cancer has arisen from the cells of a single girl devil that lived quite some time ago. We don’t have genetic material from that devil, because it lived and died in the wild and was probably never seen by a person.”
These tumors are very special: They are spread through bites. An infected devil bites another devil and loses some cancer cells in the process. The result was clones of the she-devil’s cancer hopping from one individual to another, which is a rarity in cancers. Somehow, the cells are able to take up residence in the newly infected devil without alerting its immune system of their presence.
The cancer has spread to most of the devil populations in Tasmania, though some are kept safe in captivity. It kills relatively quickly, within a few months, and veterinarians have no treatments for it. At the rate it is spreading and killing these marsupials, it could destroy the Tasmanian devil population within the next 30 years, scientists estimate.
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