Navigation Links
Tumor suppressor genes speed up and slow down aging in engineered mouse
Date:5/30/2008

ROCHESTER, Minn. -- Mayo Clinic researchers have developed an animal model that can test the function of two prominent tumor suppressor genes, p16 and p19, in the aging process. Scientists knew that both these genes were expressed at increased levels as humans and mice age, but their role in the aging process was not clear. Findings by the Mayo team show that p16 provides gas to accelerate cellular aging, while p19 stops that process.

The findings, to be published May 30 in the online issue of Nature Cell Biology, could help explain the development of some characteristics associated with aging, such as loss of muscle mass and strength or cataracts, and how they might be retarded.

"Scientists interested in aging have developed mice that lack p16 or p19, but these mice were not suitable for studies on aging because they all die of cancer before they even begin to age," says the study's first author, Darren Baker, a laboratory technician at Mayo Clinic and a doctoral candidate. "By crossing these mice with a mouse strain that ages five times faster than normal due to a mutation in the BubR1 gene, we were able to bypass this problem."

While other genes are involved in aging, the researchers firmly established that when too much p16 is produced, tissues start to age. Instead of driving aging, the p19 gene was found to counteract the effects of p16. This was completely unexpected, says Jan van Deursen, Ph.D., a molecular biologist at Mayo Clinic, because tissue culture experiments had predicted that p19 expression promotes aging.

Another important finding of the study is that initiation and progression of aging is caused, at least in part, by the accumulation of senescent or aging cells in tissues and organs. These senescent cells have an abnormal gene expression profile and secrete proteins that damage the surrounding cells, affecting tissue and organ function and aspects of aging.


'/>"/>

Contact: Robert Nellis
newsbureau@mayo.edu
507-284-5005
Mayo Clinic
Source:Eurekalert

Page: 1

Related medicine news :

1. St. Jude finds young age may give survival advantage to children with certain brain tumors
2. Fruit fly protein acts as decoy to capture tumor growth factors, find Penn researchers
3. Weill Cornell team identifies new cancer stem cell driving metastatic tumors
4. RTOG Study Likely Treatment Option for Brain Tumor Patients like Sen. Kennedy
5. Ted Kennedy Has a Brain Tumor
6. A potential route for human tumor gene therapy
7. Determining genetic signature of lung tumors can help guide treatment
8. Study: Patients 75 years and older with brain tumors may benefit from more aggressive treatment
9. Protein predicts Gleevec resistance in gastrointestinal tumors
10. Effect of mutant p53 stability on tumorigenesis and drug design
11. Video: Pediatric Brain Tumor Foundation Gives $6 Million Grant to Duke
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/25/2017)... ... 2017 , ... Norland at Swissray is pleased to announce the release of the ... ELITE DXA has an active scan window, which is more than double that of existing ... scan area could not undergo an accurate total body bone density or body composition study. ...
(Date:3/24/2017)... New York, NY (PRWEB) , ... March 24, ... ... a global scale; from third world countries to hospitals in the United States, ... sparks a conversation on the current obstacles facing infection prevention and offers strategies ...
(Date:3/24/2017)... , ... March 24, 2017 , ... Texas Physical ... can be found at 9618 Huebner Road. The clinic is the group’s 7th location ... Director, and Dr. Ali Higgins, PT, will provide care from the clinic, which opened ...
(Date:3/24/2017)... ... March 24, 2017 , ... In just two days, Aqua ... micro-veggies garden on Kickstarter . Surpassing the $100,000 milestone so quickly,10-times the ... consumers (and counting) already backing the campaign. , “We are very grateful ...
(Date:3/24/2017)... ... 2017 , ... The law firm of Enea, Scanlan & Sirignano, LLP, ... resident Lauren C. Enea has joined the firm as an associate attorney. Ms. Enea, ... in elder law, Medicaid planning and applications, and Wills, Trusts and Estates. Samantha ...
Breaking Medicine News(10 mins):
(Date:3/24/2017)... DUBLIN , Mar. 24, 2017 ... "Pain Management in the U.S.: Consumer Strategies" report to ... ... on how adults approach and treat their physical pain, emphasizing ... two distinct groups: pain sufferers and adults who have selected ...
(Date:3/24/2017)... YORK , March 24, 2017 ... ... a leading publisher of cannabis market research, the legal cannabis ... percent CAGR through 2021, despite conflicting signals from the current ... points out that the two biggest drivers of growth in ...
(Date:3/24/2017)... India , March 24, 2017 A ... market has been growing rapidly as the global sales of Adcetris ... the growth in the antibody drug conjugates market is driven by ... of cancer and wider therapeutic window offered by ADCs. ... Browse 3 Tables and 94 ...
Breaking Medicine Technology: