HOME >> BIOLOGY >> NEWS
Changing length of days reverses how estrogen affects aggressiveness in mice

COLUMBUS , Ohio New research shows how simply varying the length of daylight to which mice are exposed to can change how aggressively they react to other mice.

The study found that in the short days of winter, the class of hormones called estrogens acts to increase aggression in males of a particular type of mouse called the Oldfield Mouse (Peromyscus polionotus).

However, in the long days of summer, estrogen decreases aggression among male Oldfield mice, a species commonly found in the southeastern United States .

"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."

The study is also important because it is one of the few that has shown how hormones other than testosterone can affect aggression in mammals.

"This goes against the common belief that testosterone is the hormone that regulates aggression," said Randy Nelson, co-author and professor of psychology and neuroscience at Ohio State. "There are now several studies showing that in some species estrogen plays a key role in aggressiveness as well."

While this research has just begun, the findings could have broad implications in humans, for issues such as aggression and the role of estrogen in promoting cancer, Trainor said.

Nelson and Trainer presented their results Oct. 18 in Atlanta at the annual meeting of the Society for Neuroscience.

A major finding of this study was that the length of exposure to daylight affected how estrogen interacted or didn't interact with genes in the brains of mice that regulated aggression.

"Typically, when scientists talk about a gene-environment interaction, they are talking about a very complicated environment," Nelson said.

"But
'"/>

Contact: Randy Nelson
Rnelson@osu.edu
614-292-7005
Ohio State University
18-Oct-2006


Page: 1 2 3 4

Related biology news :

1. Changing climate will challenge Northeast agriculture, CU expert warns
2. How the Biotech Revolution Is Changing the Way We Fight Disease
3. Changing ocean conditions led to decline in Alaskas sea lion population
4. Overcoming Health Disparities: The Changing Landscape
5. Changing Face of Chemical Engineering Education
6. Changing ecosystems
7. How does day length affect aggression in mice? Its in the genes
8. UC researchers shatter world records with length of latest carbon nanotube arrays
9. Alcohol and health: Those 2 glasses a day that lengthen your life
10. World faces challenge as life expectancies lengthen, scientist says
11. RNAi and telomere length

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 5, 2017 Today ... announcing that the server component of the HYPR platform ... for providing the end-to-end security architecture that empowers biometric ... HYPR has already secured over 15 million users ... including manufacturers of connected home product suites and physical ...
(Date:4/4/2017)... , April 4, 2017   EyeLock LLC , ... that the United States Patent and Trademark Office (USPTO) ... covers the linking of an iris image with a ... and represents the company,s 45 th issued patent. ... is very timely given the multi-modal biometric capabilities that ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... ... a basic first aid supply for any work environment, but most personal eye wash can ... a dangerous substance enters both eyes? It’s one less decision, and likely quicker response time ... , “Whether its dirt and debris, or an acid or alkali, getting anything in your ...
(Date:10/11/2017)... LAGUNA HILLS, Calif. , Oct. 11, 2017  SkylineDx ... London (ICR) and University of Leeds ... to risk-stratify patients with multiple myeloma (MM), in a multi-centric ... The University of Leeds is the ... UK, and ICR will perform the testing services to include ...
(Date:10/10/2017)... ... October 10, 2017 , ... San Diego-based team building and ... rebranding initiative announced today. The bold new look is part of a transformation ... moves into a significant growth period. , It will also expand its service offering ...
(Date:10/10/2017)... 2017 International research firm Parks Associates announced today ... the TMA 2017 Annual Meeting , October 11 in ... home security market and how smart safety and security products impact the ... Parks Associates: Smart Home Devices: ... "The residential security market has experienced ...
Breaking Biology Technology:
Cached News: