Navigation Links
NYU dental professor discovers biological clock
Date:4/5/2008

Why do rats live faster and die younger than humans? A newly discovered biological clock provides tantalizing clues.

This clock, or biological rhythm, controls many metabolic functions and is based on the circadian rhythm, which is a roughly 24-hour cycle that is important in determining sleeping and feeding patterns, cell regeneration, and other biological processes in mammals.

The newly discovered rhythm, like the circadian rhythm, originates in the hypothalamus, a region of the brain that functions as the main control center for the autonomic nervous system. But unlike the circadian rhythm, this clock varies from one organism to another, operating on shorter time intervals for small mammals, and longer ones for larger animals. For example, rats have a one-day interval, chimpanzees six, and humans eight.

NYU dental professor Dr. Timothy Bromage discovered the rhythm while observing incremental growth lines in tooth enamel, which appear much like the annual rings on a tree. He also observed a related pattern of incremental growth in skeletal bone tissue the first time such an incremental rhythm has ever been observed in bone.

Reporting his findings today in the Late-breaking News session during the 37th Annual Meeting of the American Association for Dental Research, Bromage said, The same biological rhythm that controls incremental tooth and bone growth also affects bone and body size and many metabolic processes, including heart and respiration rates. In fact, the rhythm affects an organisms overall pace of life, and its life span. So, a rat that grows teeth and bone in one-eighth the time of a human also lives faster and dies younger.

Humans have by far the most variation in these long-term incremental growth rhythms, with some humans clocking as few as five days, and others as many as ten. Correspondingly, humans have the most variability in body size among mammals. Future research will assess whether there is a link between slower growth rhythms and growth disorders. Since the autonomic nervous system controls human behavior, future research will also assess whether growth rhythms can be linked to variations in human behavior.


'/>"/>

Contact: Linda Hemphill
lhemphill@iadr.org
703-299-8091
International & American Association for Dental Research
Source:Eurekalert

Related medicine news :

1. Delta Dental of Illinois Introduces Smile Smart For Your Health
2. Toms of Maine Tooth Floss Earns American Dental Associations Seal of Acceptance
3. Most comprehensive study of mercury in dental fillings begins
4. Guardians Dental Network Experiences Double-Digit Growth
5. Milestone Scientific to Exhibit the STA(TM) System at the American Dental Associations 148th Annual Session in San Francisco
6. Ohio Dental Association Installs New President and Officers
7. Delta Dental Plans Association Forms National Scientific Advisory Committee
8. Dental Researchers Participate in Global Awareness Initiative
9. Incidental findings found when radiologists take a broader look at renal MRA
10. Wrigleys Orbit(R), Extra(R) and Eclipse(R) Sugar-Free Chewing Gums Awarded American Dental Associations Seal of Acceptance
11. Astra Tech Acquires an Innovative Dental CAD/CAM Company
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... (PRWEB) , ... June 26, 2016 , ... Pixel Film ... Pro X. , "Film editors can give their videos a whole new perspective by ... Austin - CEO of Pixel Film Studios. , ProSlice Levels contains over 30 ...
(Date:6/25/2016)... ... June 25, 2016 , ... Austin residents seeking Mohs surgery ... of Mohs Surgery and to Dr. Russell Peckham for medical and surgical dermatology. , ... for skin cancer. The selective fellowship in Mohs Micrographic Surgery completed by Dr. Dorsey ...
(Date:6/25/2016)... ... June 25, 2016 , ... Dr. Calvin ... injury. Recently, he has implemented orthobiologic procedures as a method for treating his ... of the first doctors to perform the treatment. Orthobiologics are substances that orthopaedic ...
(Date:6/24/2016)... ... 2016 , ... June 19, 2016 is World Sickle Cell Observance Day. In ... benefits of holistic treatments, Serenity Recovery Center of Marne, Michigan, has issued ... Sickle Cell Disease (SCD) is a disorder of the red blood cells, which can ...
(Date:6/24/2016)... ... 2016 , ... Comfort Keepers® of San Diego, CA is excited to announce ... program to drive cancer patients to and from their cancer treatments. Comfort Keepers ... of life and ongoing independence. Getting to and from medical treatments is one ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... -- Research and Markets has announced ... Applications, Technologies, Forecasts" report to their offering. ... Smart Skin, Structural Health Monitoring, Composite Smart Structures, ... involves electronic and/or electrical components and circuits that ... such as vehicle bodies or conformally placed upon ...
(Date:6/24/2016)... Research and Markets has announced the ... Tests" report to their offering. ... The World Market for Companion Diagnostics covers the ... analysis in the report includes the following: ... Kits) by Region (N. America, EU, ROW), 2015-2020 , ...
(Date:6/24/2016)... Tenn. , June 24, 2016  Arkis ... providing less invasive and more durable cerebrospinal fluid ... in funding.  The Series-A funding is led by ... Lighthouse Fund, and other private investors.  Arkis, new ... neurosurgical instrumentation and the market release of its ...
Breaking Medicine Technology: