HOME >> BIOLOGY >> NEWS
Constant lighting may disrupt development of preemies' biological clocks

its with constant lighting. Other studies have found that infants placed in units that maintain a day/night cycle gain weight faster than those in units with constant light.

The research is a follow-up from a study that the McMahon group published last year which found that long periods of constant light disrupt the synchronization of the biological clock in adult mice. In all mammals, including mice and humans, the master biological clock is located in an area of the brain called the suprachiasmatic nuclei (SCN). It influences the activity of a surprising number of organs, including the brain, heart, liver and lungs and regulates the daily activity cycles known as circadian rhythms.

The SCN is filled with special neurons that are wired in such a way that their activity varies on a regular cycle of roughly 24 hours. In a normal brain, the activity of these clock neurons is synchronized to a single cycle which is set by the 24-hour day/night cycle.

McMahon's previous study found that the SCN neurons in adult mice begin drifting out of phase after a mouse is exposed to constant light for about five months and that this is accompanied by a breakdown in their ability to maintain their normal nocturnal cycle.

"After we got this result, my post-doctoral fellow, Hidenobu Ohta, who is now a pediatrician at Tohoku University Hospital in Japan, wanted to study the impact of constant light on newborn mice because he was interested in finding out whether the use of constant light in NICUs may be having a similar effect," McMahon said.

Newborn mice provide a good model for premature human infants because baby mice are born at an earlier stage of development than humans, a stage closely equivalent to that of premature babies.

"We found that the newborn mice were even more vulnerable to the effects of constant light than the adults," McMahon said.

The researchers took two groups of newborn mice. One group wa
'"/>

Contact: David F. Salisbury
david.salisbury@vanderbilt.edu
615-343-6803
Vanderbilt University
21-Aug-2006


Page: 1 2 3 4

Related biology news :

1. Constant din of barking causes stress, behavior changes in dogs in shelters
2. Evolution: Constant Change and Common Threads
3. Low-energy LED lighting project is streets ahead
4. Prozac exposure found to disrupt mussel reproduction
5. Carbon cycle was already disrupted millions of years ago
6. Yale researchers find environmental toxins disruptive to hearing in mammals
7. For the first time: Longevity modulated without disrupting life-sustaining function
8. New method enables gene disruption in destructive fungal pathogen
9. Scientists determine structure of enzyme that disrupts bacterial virulence
10. New research on endocrine disrupting chemicals to be presented at ENDO 2005 87th Annual meeting
11. Currents could disrupt ocean food chain

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/9/2019)... ... March 07, 2019 , ... A firm believer in causes ... & Lymphoma Society (LLS). This donation will help fund not only research to find ... families. , “We are always on the lookout for ways to make a ...
(Date:3/9/2019)... ... March 09, 2019 , ... ... hM4Di ligands – exciting compounds for scientists studying GPCR and DREADD signalling. Hello ... and the National Institute of Neurological Disorders and Stroke, both institutes of the ...
(Date:2/27/2019)... ALAMEDA, Calif. (PRWEB) , ... February 27, 2019 , ... ... today announced that it has received a National Cancer Institute grant for further development ... of 9 months, with clinical support from the lab of Dr. Omar Mian at ...
Breaking Biology News(10 mins):
(Date:3/12/2019)... ... March 12, 2019 , ... Diagenode, a leading ... its third generation long-fragment DNA shearing innovation, the Megaruptor 3. This new solution ... automated processing, and the ability to process up to 8 samples simultaneously ...
(Date:3/9/2019)... ... March 07, 2019 , ... ACEA ... the development and commercialization of high performance, cutting-edge cell analysis platforms for life ... with GLP-certified expertise in cardiovascular pharmacology and electrophysiology, are announcing a partnership to ...
(Date:3/5/2019)... , ... March 05, 2019 , ... ... cold chain engineering firm with regulatory filing authorities, logistics network experts, and experienced ... to initiate its participation in the Inc. Verified Profile program, Inc. editors independently ...
(Date:2/27/2019)... ... 2019 , ... Superior Controls, Inc., a leading Life Sciences ... on both the east and west coasts, today announced that employee Nathan Sandmaier, ... Sandmaier, a senior project engineer, joins Taggart McCormick, P.E., Anthony Whitesell, P.E., and ...
Breaking Biology Technology:
Cached News: