Factor in naked mole rat's cells enhances protein integrity

August 30, 2014
The naked mole rat, a long-lived rodent, is being studied for the secrets its biology can reveal about healthy aging. Investigators at The University of Texas Health Science Center at San Antonio found a factor in the rodent's cells that protects and alters function of the proteasome, a garbage disposer for damaged and obsolete proteins. Credit: UT Health Science Center at San Antonio

Scientists at the Barshop Institute for Longevity and Aging Studies, part of the School of Medicine at the UT Health Science Center at San Antonio, have found another secret of longevity in the tissues of the longest-lived rodent, the naked mole rat.

They reported that a factor in the cells of naked mole rats protects and alters the activity of the proteasome, a garbage disposer for damaged and obsolete proteins.

The factor also protects proteasome function in human, mouse and yeast cells when challenged with various proteasome poisons, studies showed. These proteasomes usually rapidly stop functioning, leading to the accumulation of damaged proteins that further impair cell function, contributing to the vicious cycle that leads to cell death.

"I think this factor is part of an overall process or mechanism by which naked mole rats maintain their quality," study first author Karl Rodriguez, Ph.D., said.

Generally, as an organism ages, not only are there more damaged proteins in need of disposal, but the proteasome itself becomes damaged and less efficient in clearing out the damaged proteins.

As a result, protein quality declines and this contributes to the functional declines seen during aging. Enhancement of protein quality, meanwhile, leads to longer life in yeast, worms, fruit flies and naked mole rats, Dr. Rodriguez said.

Dr. Rodriguez, a San Antonio native who completed both his master's and doctoral degrees at the Health Science Center, is a postdoctoral fellow in the laboratory of Rochelle Buffenstein, Ph.D., professor of physiology at the Barshop Institute. For this study, the Buffenstein lab also collaborated with Pawel Osmulski, Ph.D., assistant professor of molecular medicine; Susan Weintraub, Ph.D., professor of biochemistry; and Maria Gaczynska, Ph.D., associate professor of molecular medicine.

Naked mole rats, which burrow through underground tunnels in their native East Africa, are nearly hairless rodents. They live as long as 32 years. Naked maintain cancer-free good health and reproductive potential well into their third decade of life.

These findings are reported in the journal BBA: Molecular Basis of Disease.

Explore further: Rat pack: Scientists warming up to African rodent

More information: Biochim Biophys Acta 2014 Jul 10. Epub 2014 Jul 10. www.sciencedirect.com/science/article/pii/S0925443914002166

Related Stories

Naked mole genome sequenced

October 12, 2011

Scientists have sequenced the complete genome of the naked mole rat, a pivotal step to understanding the animal's extraordinarily long life and good health. A colony of more than 2,000 naked mole rats at The University of ...

Naked mole rat may hold the secret to long life

July 2, 2012

Compared to the average three year life span of a common rat, the 10 to 30 year life of the naked mole rat, a subterranean rodent native to East Africa, is impressive. And compared to the human body, the body of this rodent ...

Recommended for you

Scientists overcome key CRISPR-Cas9 genome editing hurdle

December 1, 2015

Researchers at the Broad Institute of MIT and Harvard and the McGovern Institute for Brain Research at MIT have engineered changes to the revolutionary CRISPR-Cas9 genome editing system that significantly cut down on "off-target" ...

Study finds 'rudimentary' empathy in macaques

December 1, 2015

(Phys.org)—A pair of researchers with Centre National de la Recherche Scientifique and Université Lyon, in France has conducted a study that has shown that macaques have at least some degree of empathy towards their fellow ...

Which came first—the sponge or the comb jelly?

December 1, 2015

Bristol study reaffirms classical view of early animal evolution. Whether sponges or comb jellies (also known as sea gooseberries) represent the oldest extant animal phylum is of crucial importance to our understanding of ...

Trap-jaw ants exhibit previously unseen jumping behavior

December 1, 2015

A species of trap-jaw ant has been found to exhibit a previously unseen jumping behavior, using its legs rather than its powerful jaws. The discovery makes this species, Odontomachus rixosus, the only species of ant that ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.