HOME >> BIOLOGY >> NEWS
How does day length affect aggression in mice? It's in the genes

COLUMBUS, Ohio Imagine if a naturally occurring chemical in your body could help make you feel more calm and relaxed but it would only work during the long days of summer.

The same chemical would, instead, make you aggressive and nasty when you were exposed to less daylight during the winter.

That's exactly what occurs for a specific species of mouse, according to a new study at Ohio State University, published online this week in the Proceedings of the National Academy of Sciences.

Researchers found that the class of hormones called estrogens acts to increase aggression in the Oldfield Mouse (Peromyscus polionotus) during the short days of winter. However, when daylight increases in the summer, estrogen decreases aggression among male Oldfield mice, a species commonly found in the southeastern United States.

The finding is significant because it is one of the first studies to show how a very simple environmental factor in this case, the length of daylight can have a powerful effect on how genes influence behavior, at least in some species.

"We found that estrogen has totally opposite effects on behavior in these mice depending only on how much light they got each day," said Brian Trainor, co-author of the study and postdoctoral fellow in psychology and neuroscience at Ohio State University.

"It is quite a surprising finding."

While other studies have examined how environment interacts with genes to influence behavior, most of these studies have examined very complex environmental conditions, said Randy Nelson, co-author and professor of psychology and neuroscience at Ohio State.

"We're looking at a very simple environmental factor influencing a complex behavior," Nelson said. "In these mice, day length controls the gene expression that influences aggression."

In one study, male mice were castrated to stop production of testosterone. They then were fitted with im
'"/>

Contact: Randy Nelson
Rnelson@osu.edu
614-292-7005
Ohio State University
21-May-2007


Page: 1 2 3 4

Related biology news :

1. UC researchers shatter world records with length of latest carbon nanotube arrays
2. Alcohol and health: Those 2 glasses a day that lengthen your life
3. Changing length of days reverses how estrogen affects aggressiveness in mice
4. World faces challenge as life expectancies lengthen, scientist says
5. RNAi and telomere length
6. Concurrent radiation, chemo, followed by surgery lengthens lung cancer patients survival
7. Finger length predicts physically aggressive personalities, study shows
8. Strength of connections between brain regions may affect an adolescents response to peer influence
9. Pediatric ritalin use may affect developing brain, new study suggests
10. Brightly colored birds most affected by Chernobyl radiation
11. Loss of hemlocks will affect water dynamics in southern Appalachian forests

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


(Date:4/6/2017)... Forecasts by Product Type (EAC), Biometrics, Card-Based ... & Logistics, Government & Public Sector, Utilities / Energy ... Nuclear Power), Industrial, Retail, Business Organisation (BFSI), Hospitality & ... for a definitive report on the $27.9bn Access Control ... ...
(Date:4/5/2017)... April 4, 2017 KEY FINDINGS ... expand at a CAGR of 25.76% during the forecast ... the primary factor for the growth of the stem ... https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The global stem cell ... application, and geography. The stem cell market of the ...
(Date:3/30/2017)... 30, 2017  On April 6-7, 2017, Sequencing.com will ... hackathon at Microsoft,s headquarters in ... focus on developing health and wellness apps that provide ... the Genome is the first hackathon for personal ... largest companies in the genomics, tech and health industries ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... ComplianceOnline’s Medical Device Summit is ... and 8th June 2018 in San Francisco, CA. The Summit brings together current and ... distinguished CEOs, board directors and government officials from around the world to address key ...
(Date:10/11/2017)... ... ... Disappearing forests and increased emissions are the main causes of the evolving air ... living in larger cities are affected by air pollution related diseases. , That is ... globally - decided to take action. , “I knew I had to take action ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights that give it ... Nanoparticle), a technology developed in collaboration with Children’s Hospital Los Angeles (CHLA). ...
(Date:10/10/2017)... Calif. , Oct. 10, 2017 SomaGenics ... from the NIH to develop RealSeq®-SC (Single Cell), expected ... for profiling small RNAs (including microRNAs) from single cells ... Program highlights the need to accelerate development of approaches ... "New techniques for measuring levels ...
Breaking Biology Technology:
Cached News: