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:4/24/2014)... a red light or a stop sign? Or have ... passed by but totally missed seeing? , "When we ... only be aware of so much of what we ... the University of Illinois. "For example, when you,re driving, ... , But say there,s an unexpected event: an emergency ...
(Date:4/24/2014)... COLUMBIA, Mo. When bacteria attack plants, they ... cells to weaken and suppress natural defenses. However, ... the plant cells as a potential host. Now, ... and replicated the process that allows the bacteriaknown ... discovery could lead to natural anti-infective treatments that ...
(Date:4/24/2014)... a scientist at Western University and the Lawson Health ... metastasizes to the lung. , Breast cancer is the ... of cancer-related deaths among women in North America. ... high success rate, but once the disease spreads beyond ... lung is one of the most common and deadly ...
Breaking Biology News(10 mins):Controlling brain waves to improve vision 2Controlling brain waves to improve vision 3Plants send out signals attracting harmful bacteria, MU study finds 2New study helps to explain why breast cancer often spreads to the lung 2
... (SACRAMENTO, Calif.) Smokers who don,t quit before ... neck cancers fair significantly worse than those who do, ... Allen Chen, an assistant professor in the Department ... found that head- and neck-cancer patients who continue to ...
... This press release is available in French . ... most deadly parasitic diseases in the world. It affects more than ... it kills 50 000 people each year. A reliable and rapid ... now, this has been next to impossible. Dr. Momar Ndao and ...
... America needs more vitamin D. It,s one more reason to ... at the Experimental Biology conference in Anaheim, California. Milk is ... supplying nearly half of all of the much-needed vitamin D. ... what more than 16,000 Americans ages two and older eat, ...
Cached Biology News:Smoking during radiation therapy for head and neck cancers linked to poorer outcomes 2Smoking during radiation therapy for head and neck cancers linked to poorer outcomes 3Major breakthrough in the diagnosis of parasitic diseases 2
(Date:1/15/2014)... 2014 ­ RedBrick Health , a fast-growing leader ... announces that EmblemHealth , the New ... now providing the RedBrick Compass health assessment, combined with ... of its members. EmblemHealth is among the first health ...
(Date:1/15/2014)... (PRWEB) January 15, 2014 More than ... and about 1 in 3 seniors will die with ... ). These jaw-dropping figures have shocked many Americans into ... hopefully, help prevent these tragic age-related cognitive disorders. Jonathan ...
(Date:1/15/2014)... DTS Language Services, Inc . is pleased to ... Science organizations who need document translations. Clients will now ... documents in advance with a selection of nearly 50 life ... a critical factor in clinical and scientific fields, and decrease ...
(Date:1/15/2014)... 15, 2014 AudioNotch is the internet's ... for the treatment of tinnitus. Patients listen to sound ... over a period of weeks to months, their tinnitus volume ... two forms: Notched Music and Notched White Noise. Now, AudioNotch ...
Breaking Biology Technology:EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 2EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 3Biohack Pure Offers 5 Tips for Increasing Memory in 2014 2DTS Improves Efficiency for Life Science Document Translations 2
... availability of its newest report, Prospering in ... In this report, BioInformatics, LLC ( www.gene2drug.com ... life science market, provides hard data and analysis that ... science suppliers. BioInformatics, LLC fielded a detailed 45-question survey ...
... The following release is being issued by the Greater ... CEO, Greater Baltimore Committee150 company owners, executives and researchers from ... Maryland Bioscience Awards , , WHEN: ... Breakfast & Registration , 8:45 - 9:45 a.m. / Awards ...
... has launched that facilitates the search for egg donors ... Donor Network Alliance (DNA) is the first and ... agencies across the United States.Membership-based DNA was started by ... need to pool resources: The Center for Egg ...
Cached Biology Technology:New Report - Prospering in a Down Market: Strategies for Life Science Suppliers 2New Report - Prospering in a Down Market: Strategies for Life Science Suppliers 3Greater Baltimore Committee to Announce Winners of 2009 Maryland Bioscience Awards at Ceremonies on March 12 2Greater Baltimore Committee to Announce Winners of 2009 Maryland Bioscience Awards at Ceremonies on March 12 3Agencies Unite to Launch Donor Network Alliance: First-Ever Web-Based Collective of Egg Donor Candidates 2