Navigation Links
A molecular map for aging in mice
Date:11/28/2007

Researchers at the National Institute of Aging and Stanford University have used gene arrays to identify genes whose activity changes with age in 16 different mouse tissues. The study, published November 30 in PLoS Genetics, uses a newly available database called AGEMAP to document the process of aging in mice at the molecular level. The work describes how aging affects different tissues in mice, and ultimately could help explain why lifespan is limited to just two years in mice.

As an organism ages, most tissues change their structure (for example, muscle tissues become weaker and have slow twitch rather than fast twitch fibers), and all tissues are subject to cellular damage that accumulates with age. Both changes in tissues and cellular damage lead to changes in gene expression, and thus probing which genes change expression in old age can lead to insights about the process of aging itself.

Previous studies have studied gene expression changes during aging in just one tissue. The new work stands out because it is much larger and more complete, including aging data for 16 different tissues and containing over 5.5 million expression measurements.

One noteworthy result is that some tissues (such as the thymus, eyes and lung) show large changes in which genes are active in old age whereas other tissues (such as liver and cerebrum) show little or none, suggesting that different tissues may degenerate to different degrees in old mice.

Another insight is that there are three distinct patterns of aging, and that tissues can be grouped according to which aging pathway they take. This result indicates that there are three different clocks for aging that may or may not change synchronously, and that an old animal may be a mixture of tissues affected by each of the different aging clocks.

Finally, the report compares aging in mice to aging in humans. Several aging pathways were found to be the same, and these could be interesting because they are relevant to human aging and can also be scientifically studied in mice.


'/>"/>

Contact: Mary Kohut
Press@plos.org
415-568-3460
Public Library of Science
Source:Eurekalert

Related medicine news :

1. A new molecular zip code, and a new drug target for Huntingtons disease
2. New knock-out gene model provides molecular clues to breast cancer
3. Molecular probe paints cancer cells in living animals, Stanford researchers find
4. Story ideas from molecular & cellular proteomics
5. SNM seeks novel approaches to molecular imaging to showcase at annual meeting
6. SNM seeks novel approaches to molecular imaging to showcase at annual meeting
7. Molecular fingerprint of breast-cancer drug resistance can predict response to treatment
8. Molecular profiling can accurately predict survival in colon cancer patients
9. Xceed Molecular Names Fran Tuttle to Its Board of Trustees
10. Virginia G. Piper Charitable Trust and Flinn Foundation launch molecular diagnostics initiative
11. Xceed Molecular Launches Ziplex(R) Automated Gene-Expression System at the Association for Molecular Pathology, Booth 84/85
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... ... December 02, 2016 , ... ... the launch of its 60-day free trial program for all of the company’s ... the offer a truly hassle free experience. , FlexiSpot’s unique desktop risers use ...
(Date:12/2/2016)... ... 2016 , ... With the number of pain management programs available for people ... the one that works for them. When an inventor from Suisun City, Calif., was ... decided to share it with others. , He developed a prototype for PRO GO ...
(Date:12/2/2016)... ... 2016 , ... Mediaplanet is proud to announce the launch ... innovative treatments, therapeutic technologies, and revolutionized nutrition that are helping patients and physicians ... years in the last 3 decades,” says Dr. Valentine Fuster, a world-renowned cardiologist. ...
(Date:12/2/2016)... ... 02, 2016 , ... Sourced from the Isbre Springs beneath the 5,000 year ... natural purity of just 6 ppm TDS (Total Dissolved Solids) in addition to its ... available in several ShopRite and FoodTown stores in NJ and received rave comments from ...
(Date:12/2/2016)... ... December 02, 2016 , ... Clarify Health Solutions, Inc., ... $6.0 million in an initial round of funding. The round was led by ... caregivers can receive far better care through the application of the best technologies ...
Breaking Medicine News(10 mins):
(Date:11/30/2016)... Research and Markets has announced the addition of the ... report to their offering. ... , The cerebrospinal fluid (CSF) acts ... it is circulated though the brain and its ventricles, the spine and ... surrounding the brain changes significantly. As a result, ...
(Date:11/30/2016)... Research and Markets has announced the addition ... report to their offering. ... , Detachable coil embolization is a ... The detachable coil embolization treatment of cerebral aneurysms is less invasive and ... area in the wall of an artery in the brain. This area ...
(Date:11/30/2016)... Calif. , Nov. 30, 2016 Varian ... it was named America,s Most JUST Company in the ... and Forbes magazine,s inaugural "JUST 100 List." ... of the largest surveys ever conducted on attitudes towards ... months. This inaugural list ranks U.S companies against their ...
Breaking Medicine Technology: