Navigation Links
Naked mole-rats bear lifesaving clues
Date:2/23/2012

Could blind, buck-toothed, finger-sized naked mole-rats harbor in their brain cells a survival secret that might lead to better heart attack or stroke treatments?

University of Illinois at Chicago biologist Thomas Park and colleagues at UIC and the University of Texas Heath Science Center at San Antonio think the subterranean lifestyle of the pasty-looking rodents may indeed hold clues to keeping brain cells alive and functioning when oxygen is scarce. The key may lie in how brain cells regulate their intake of calcium.

"Normally, calcium in brain cells does wonderful things, including forming memories," says Park, who is professor of biological sciences at UIC. "But too much calcium makes things go haywire."

Brain cells starved of oxygen can't regulate calcium entry, and too much calcium in the cell is lethal. When a heart attack or stroke prevents oxygenated blood from reaching the brain, brain damage or death results.

Naked mole-rats, however, are very tolerant to oxygen deprivation, or hypoxia -- as are human newborns, whose brain cells have calcium channels that close during oxygen deprivation, protecting the cells from calcium overdose. With age, these calcium channels no longer close, which normally isn't a problem -- except during a heart attack.

Naked mole-rats retain a tolerance for oxygen deprivation into adulthood. Park and his colleagues measured calcium entry in brain tissue that had been kept under oxygen-poor conditions, reporting their findings online Feb. 21 in PLoS One.

"We knew the adults of this unusual mammal had brains that, like infant humans, were very tolerant to oxygen deprivation," he said. "We wanted to know if the adult naked mole-rats used the same strategy as babies to prevent calcium entry. This is exactly what we found."

Park thinks this strategy is an evolutionary adaptation by mole-rats, which live in the hundreds underground in tight, oxygen-deprived conditions.

"Imagine 200 mice living in a shoe box buried four feet under the ground -- things are going to get bad fast," he said.

The researchers think they have identified a novel mechanism for protecting the adult brain in times of oxygen deprivation.

"Developing this target into a clinical application is our next goal," he said. "We need to find a way to rapidly up-regulate the infant-type of calcium channels. Adult humans actually have some of these channels already, but far fewer than infants."

Park, who for years has studied naked mole-rats and their unusual adaptations, thinks the latest findings "are just the tip of the iceberg" of what we can learn from the rodents. Their homes are not only oxygen-poor, but rich in carbon dioxide and ammonia -- conditions that would make most animals ill. Yet mole-rats have evolved to suppress pain and even cancer.

"The more we study these creatures," said Park, "the more we learn."


'/>"/>

Contact: Paul Francuch
francuch@uic.edu
312-996-3457
University of Illinois at Chicago
Source:Eurekalert

Related biology news :

1. Bottom of the swimming league: Naked mole rat sperm
2. Barshop Institute, global team sequences DNA of naked mole rat
3. Naked penguins baffle experts
4. New Naked Scientists series investigates our oceans
5. Serendipity leads to lifesaving discovery
6. Cleveland Clinic joins 23andMe in the search for genetic clues to Parkinsons disease
7. A bugs (sex) life: Diving beetles offer unexpected clues about sexual selection
8. Spasticity gene finding provides clues to causes of nerve cell degeneration
9. Ancient dry spells offer clues about the future of drought
10. Neurons grown from skin cells may hold clues to autism
11. Hydrogen peroxide provides clues to immunity, wound healing and tumor biology
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/21/2016)... , June 21, 2016 NuData Security announced ... new role of principal product architect and that ... director of customer development. Both will report directly ... officer. The moves reflect NuData,s strategic growth in ... to high customer demand and customer focus values. ...
(Date:6/9/2016)...  Perkotek an innovation leader in attendance control systems is proud to announce the ... employers to make sure the right employees are actually signing in, and to even ... ... ... ...
(Date:6/2/2016)... 2, 2016 The Department of Transport ... the 44 million US Dollar project, for the , ... including Personalization, Enrolment, and IT Infrastructure , to ... production and implementation of Identity Management Solutions. Numerous renowned international ... Decatur was selected for the most compliant ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... OTTAWA, ON (PRWEB) , ... June 23, 2016 , ... ... former DNA Technical Leader at the Arkansas State Crime Laboratory, has joined STACS DNA ... joining the STACS DNA team,” said Jocelyn Tremblay, President and COO of STACS DNA. ...
(Date:6/23/2016)... Ky. , June 23, 2016 ... two Phase 1 clinical trials of its complement ... placebo-controlled, single and multiple ascending dose studies designed ... pharmacodynamics (PD) of subcutaneous injection in healthy adult ... subcutaneously (SC) either as a single dose (ranging ...
(Date:6/23/2016)... June 23, 2016 ... 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 Published recently ... peer-reviewed journal from touchONCOLOGY, Andrew D Zelenetz ... of cancer care is placing an increasing burden ... expensive biologic therapies. With the patents on many ...
(Date:6/23/2016)... ... June 23, 2016 , ... ClinCapture, the only free validated ... will showcase its product’s latest features from June 26 to June 30, 2016 ... on Disrupting Clinical Trials in The Cloud during the conference. DIA (Drug ...
Breaking Biology Technology: