‘Stem Cell Zoo’ To Save Endangered Species

There are two types of African rhinoceros—white and black. However, they are neither white nor black. Instead, both species are a dark brownish-gray. Photo Credit: Jeremiah Blatz

(STEM CELL RESEARCH) Science is advancing yet again, with the focus now on saving endangered species through what researchers call a “stem cell zoo.” This “zoo” houses the stem cells of only two animals — the critically endangered drill primate and white rhino — so far, but will hopefully expand to contain those of all endangered animals. Drill primates in captivity suffer from diabetes, which can be cured through stem cell science, while white rhinos are considered the most endangered animals in the world with only seven remaining. Read on for more regarding the science behind reviving endangered species and what progress is to come. — Global Animal

Yahoo News, Jennifer Welsh

Stem cells are quickly becoming an important tool for human medical treatments, and researchers are betting they will also be a useful tool for zoo animals. They are working to create stem cell lines from zoo animals, for use in treating animal diabetes and other ailments as well as helping the animals reproduce.

The scientists have already created a “frozen zoo,” which contains different types of cells from every animal there, and now they are putting together a “stem cell zoo.”

White rhinos are the most endangered animal in the world, with only seven remaining, all of which are in captivity. Photo credit: Jeremiah Blatz (2009)

“There are only two animals in it,” study researcher Inbar Friedrich Ben-Nun, of The Scripps Research Institute, said in a statement, “but we have the start of a new zoo, the stem cell zoo.”

Stem cells are prized, because they can be turned into any type of cell in the body, a characteristic called pluripotency. The cells can even be turned into sperm or egg cells, and used in assisted reproduction to make more individuals of the species.

“The most important thing is to provide these stem cells as a resource for other people taking some of the next steps,” said Jeanne Loring, also of The Scripps Research Institute.

Endangered stem cells

The researchers started with two species: the drill primate, a highly endangered primate genetically close to humans, and the northern white rhinoceros, which is genetically far from humans and also incredibly endangered.

To create the stem cells, the researchers used the same genes that are used to turn human cells pluripotent; they inserted those genes into the animals’ skin cells. They had originally tried to use genes from the animals themselves and their close relatives, but after more than a year of trying they were having little success.

The new technique isn’t very efficient yet, transforming just a few cells into stem cells at a time, but that’s enough, the researchers said.

Stem cell therapies

Both animals, the researchers said, were chosen because they could benefit from stem cells now. For instance, the drill primate suffers from diabetes when in captivity, and stem cell-based treatments for diabetes being researched in humans suggest the same may work in these primates.

The rhinoceros was chosen because it is one of the most highly endangered species on the planet, with only seven animals, all in captivity, in existence (two of which are in the San Diego Zoo Safari Park). They haven’t reproduced in several years, and because the population is so small there is a lack of genetic diversity, which could affect their survival.

If the researchers can use the stem cells to make sperm and eggs from skin cells of deceased animals in the frozen zoo, they could reintroduce some genetic diversity into the population, while also increasing its size.

“The best way to manage extinctions is to preserve species and their habitats,” study researcher Oliver Ryder, of the San Diego Zoo, said in a statement. “But that’s not working all the time.”

The rhinos are a perfect example, he said, because there are so few. “Stem cell technology provides some level of hope that they won’t have to become extinct even though they’ve been completely eliminated from their habitats.”

More Yahoo News: http://old.news.yahoo.com/s/livescience/20110905/sc_livescience/stemcellzoomayaidendangeredspecies

More information on stem cell research see “Would You Heal Your Dog With Stem Cell Therapy?”