naked mole rat


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naked mole rat,

name applied to a species (Heterocephalus glaber) of small rodentsrodent,
member of the mammalian order Rodentia, characterized by front teeth adapted for gnawing and cheek teeth adapted for chewing. The Rodentia is by far the largest mammalian order; nearly half of all mammal species are rodents.
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 found in E Africa, whose members—the only hairless rodents—live entirely in underground communities of 80 or more individuals with a structure resembling that of social-insect colonies. Colony members are closely related and seem to work for the success of the whole community rather than individual survival. The queen is head of the colony and is the only member to breed. She has approximately ten pups per litter and about four litters per year. The mole rats divide up the specialized chores, such as collecting food, disposing of waste, and digging tunnels. The colonies have extensive tunnel systems and a large central area for nesting. Naked mole rats are classified as Phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Mammalia, order Rodentia.

Bibliography

See study by P. W. Sherman et al. (1991).

References in periodicals archive ?
In contrast to other animals, however, the longest-lived rodent is the naked mole rat, which is about the size of a mouse.
Thanks to funding from the Life Extension Foundation[R], the husband and wife team then discovered that naked mole rat protein synthesis produces remarkably few errors.
They discovered that when secreted from the naked mole rat's cells, HMM-HA prevents cells from overcrowding and forming tumors.
After identifying HMW-HA as the culprit, the researchers examined its role in the cancer resistance of naked mole rats. Removing HMW-HA from naked mole rat tissue cultures made the tissue susceptible to tumor growth.
Dr Joao Pedro Magalhaes, from the Institute of Integrative Biology, said: "The naked mole rat has fascinated scientists for many years, but it was not until a few years ago we discovered it could live for such a long period of time.
Dr Joao Pedro Magalhaes, from the Institute of Integrative Biology, said: "The naked mole rat has fascinated scientists for many years but it wasn't until a few years ago that we discovered that it could live for such a long period of time.
KEEPERS caught up with our fascinating naked mole rats to give them health checks and new names.
Gorbunova and Seluanov identified the substance as HMW-HA, which caused them to test its possible role in naked mole rat's cancer resistance.
When the researchers engineered human cells with the naked mole rat version of the sodium channel, the human cells reacted like the mole rat cells do.
Their research found that a specific gene-p16-makes the cancerous cells in naked mole rats hypersensitive to overcrowding, and stops them from proliferating when too many crowd together.
"Mole rat" is applied to rodents in several families, but the article focused on the Bathyergidae, which includes the Damaraland mole rat (Cryptomys damarensis) and the naked mole rat (Heterocephalus glaber).
The wrinkled, hairless rodent known as the naked mole rat has achieved celebrity status even outside science.