Navigation Links
Babies' biological clocks dramatically affected by birth light cycle
Date:12/5/2010

rus. This study shows that seasonal light cycles can affect the development of a specific brain function.

"We know from previous studies that light can affect the development of other parts of the brain, for example the visual system. Our work shows that this is also true for the biological clock," said Ciarleglio.

Background

The experiment was performed with a special strain of genetically engineered mice that it took McMahon two years to develop. The mice have an extra gene inserted in their genome that produces a naturally fluorescent green protein causing the biological clock neurons in their brains to glow green when they are active. This allows the scientists to directly monitor the activity of the master biological clock, which is located in the middle of the brain behind the eyes in a small area called the suprachiasmatic nucleus (SCN).

For the study, the researchers took three groups of six to eight newborn pups each and placed them (and their mothers) in environments with controlled day/night cycles. One group was placed in a "summer" cycle with 16 hours of light and eight hours of dark; another group was placed in a "winter" cycle with eight hours of light and 16 hours of dark; and a third group was placed in an equinox cycle with 12 hours of light and 12 hours of darkness. They were kept in these environments for three weeks until they were weaned.

"When they are born, the brains of mice are less developed than those of a human baby. As a result, their brains are still being wired during this period," McMahon said.

Once they were weaned, half of the summer-born mice were kept on the summer cycle and half were switched to the winter cycle for the following 28 days as they matured. The winter-born mice were given the same treatment. The equinox-born mice were split into three groups and put into summer, winter and equinox cycles.

After the mice matured, they were placed into an environment of continuous darkness.
'/>"/>

Contact: David F. Salisbury
david.salisbury@vanderbilt.edu
615-343-6803
Vanderbilt University
Source:Eurekalert

Page: 1 2 3 4 5

Related biology news :

1. World breakthrough in treating premature babies
2. Consumers desire more genetic testing, but not designer babies
3. Study finds rescue course of antenatal steroids improves outcome in premature babies
4. Mama whales teach babies where to eat
5. Engineering bouncing babies, 1 at a time
6. Tufted bacteria cause infection in premature babies
7. Babies born to native high-altitude mothers have decreased risk of low birth weight
8. ICSI or IVF: Babies born from frozen embryos do just as well
9. Supplementing babies formula with DHA boosts cognitive development
10. Will giving coffee to babies keep them awake as adults?
11. Healthy babies by the numbers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/27/2014)... belief that a deficiency in serotonin a chemical ... in depression. In the journal ACS Chemical Neuroscience ... make serotonin in their brains (and thus should have ... symptoms. , Donald Kuhn and colleagues at the ... University School of Medicine note that depression poses a ...
(Date:8/27/2014)... growing number of studies have shown that ... pathogenesis of Parkinson,s disease. Previous studies from ... University in China have shown that baicalin ... reduced divalent metal transporter 1 expression, and ... nigra of rotenone-induced Parkinson,s disease rats. However, ...
(Date:8/27/2014)... bacterium that can be found in both unprocessed and ... in Denmark have been infected with Listeria ... , The bacterium is notoriously difficult to fight because ... changes in its surroundings, says Associate Professor Birgitte Kallipolitis, ... Department of Biochemistry and Molecular Biology, she has published ...
Breaking Biology News(10 mins):New study throws into question long-held belief about depression 2Researchers discover why Listeria bacterium is so hard to fight 2Researchers discover why Listeria bacterium is so hard to fight 3
... everyone will see the light and start living more ... may be doing more harm than good. So ... a provocative essay in the March 2009 issue of ... Vucetich, assistant professor of animal ecology at Michigan Technological ...
... New York, NY) The Parkinson,s Disease Foundation (PDF) has ... Parkinson,s disease scientists. The grants will sustain promising ... sudden collapse of their primary private funder, The Picower ... by Bernard Madoff, was forced to cease all grantmaking ...
... scientists is renewing calls for policymakers to reduce both ... or nutrient pollution problems in fresh and coastal ... , the researchers argue that dual-nutrient reduction strategies are ... between nitrogen and phosphorus in fresh and coastal water ...
Cached Biology News:Abandon hope 2Parkinson's Disease Foundation awards $300,000 in bridge funding for innovative research projects 2Parkinson's Disease Foundation awards $300,000 in bridge funding for innovative research projects 3
(Date:8/27/2014)... YORK , Aug. 27, 2014 Guggenheim ... Guggenheim Partners, today announced the hiring of veteran equity ... senior equity analyst. Mr. Butler will focus on the ... our team a wealth of experience and a broad ... Ferrarie , Senior Managing Director and Head of Equities ...
(Date:8/27/2014)... 27, 2014 Research and Markets ... for Pulp & Paper Industry Report 2014" report ... for Pulp & Paper Industry Report 2014 is a ... the global enzyme for pulp & paper industry. ... industry including definitions, classifications, applications and industry chain structure. ...
(Date:8/27/2014)... , Aug. 27, 2014 Tris Pharma, ... delivery technologies, today announced that it has been selected ... & Industry Association,s 2014 Awards for Excellence ... by an independent panel of judges from SCORE (Counselors ... Award winners will be honored at a gala event ...
(Date:8/27/2014)... OR (PRWEB) August 27, 2014 After ... to reason that the next beverage craze is going ... announced today that formulators can use Stress Relief energy ... used in the making of a beverage, including minerals, ... for stress-generated energy, channeling that power into rapid recovery ...
Breaking Biology Technology:Guggenheim Securities Hires Analyst Charles "Tony" Butler to Expand Healthcare Coverage 2Global Enzyme for Pulp & Paper Industry Report 2014 2Tris Pharma Selected as an award winner in the New Jersey Business & Industry Association's 2014 Awards for Excellence 2Stress Relief: 1 Way to De-Stress Your Beverage Formula 2Stress Relief: 1 Way to De-Stress Your Beverage Formula 3Stress Relief: 1 Way to De-Stress Your Beverage Formula 4
... Company now officially following an FDA 510(k) (Pre-Market Notification), Pathway for ... ... Human Appendicitis, CASTLE ROCK, Colo., Nov. 27 AspenBio Pharma,Inc. ... of novel drugs and diagnostics for animals and humans, has,received an ...
... Shamir,Optical Industry Ltd. (Nasdaq: SHMR ) ("Shamir"), a ... ophthalmic lens,market, today announced unaudited financial results for the ... ended September 30, 2007, revenues increased by 28.5%,to $30.9 ... of 2006.,Gross profit for the quarter increased by 25.3% ...
... Masimo receives approval from Ministry of Health, Labor and Welfare ... carbon ... monoxide levels in the blood, IRVINE, Calif., ... Motion and Low Perfusion pulse,oximetry, today announced approval of the ...
Cached Biology Technology:AspenBio Pharma Pursues FDA 510(k) Application Pathway for Appendicitis Blood Test 2AspenBio Pharma Pursues FDA 510(k) Application Pathway for Appendicitis Blood Test 3AspenBio Pharma Pursues FDA 510(k) Application Pathway for Appendicitis Blood Test 4Shamir Optical Industry Ltd. Reports Third Quarter 2007 Results 2Shamir Optical Industry Ltd. Reports Third Quarter 2007 Results 3Shamir Optical Industry Ltd. Reports Third Quarter 2007 Results 4Shamir Optical Industry Ltd. Reports Third Quarter 2007 Results 5Shamir Optical Industry Ltd. Reports Third Quarter 2007 Results 6Shamir Optical Industry Ltd. Reports Third Quarter 2007 Results 7Shamir Optical Industry Ltd. Reports Third Quarter 2007 Results 8Shamir Optical Industry Ltd. Reports Third Quarter 2007 Results 9Shamir Optical Industry Ltd. Reports Third Quarter 2007 Results 10Masimo Corporation Given Approval to Market the Masimo Rad-57 Pulse CO-Oximeter in Japan 2Masimo Corporation Given Approval to Market the Masimo Rad-57 Pulse CO-Oximeter in Japan 3Masimo Corporation Given Approval to Market the Masimo Rad-57 Pulse CO-Oximeter in Japan 4
MAb to Vasopressin Preservative: NaN3...
Mouse monoclonal [0.N.509] to PCTAIRE2 ( Abpromise for all tested applications). entrezGeneID: 5128 SwissProtID: Q00537...
MMP-2 / MMP-9 Inhibitor IV is a potent, selective, slow binding and mechanism based inhibitor of human gelatinases. • Molecular weight: 306.4 • Molecular Formula: C(15)H(14)O(3)S(2). &bul...
... Spin Columns contain a proprietary high-performance desalting ... desalting and protein-recovery characteristics compared to other ... as 25 g/ml of protein can be ... 95% retention of salts and other small ...
Biology Products: