HOME >> BIOLOGY >> NEWS
Mouse study suggests mammoth evolutionary change

, some 45 miles northwest of Chicago. That discovery prompted Pergams to get all the museum specimens that were collected in Illinois' Cook and Lake counties.

The researchers used DNA taken not from the nucleus, but from mitochondria, the power plants of the cell. Each cell contains many mitochondria, but only one nucleus.

"If you are working with very degraded, ancient DNA like that from museum skins, you are way ahead using this DNA with lots of copies," said Pergams. Mitochondrial DNA evolves much more rapidly than nuclear DNA, he said, though this evolution was previously thought only to occur over thousands of years.

"We did not expect to find the rapid, consistent and directional change that we did find," he said.

While evidence of such fast change has been cited in studies of fruit flies, this is the first reported study to document such quick evolution in a mammal.

What may account for this change?

"We think it likely that the new gene sequence was either unconditionally advantageous, or that it was advantageous relative to environmental changes caused by humans," Pergams said.

"Settlers may have brought in mice with the favorable gene that were able to out-compete mice with the native variant. A less likely possibility is that mice with these new gene sequences were already present, and that dramatic changes that humans caused in the environment allowed the new gene sequence to be selectively advantageous."

Since all the mice studied were caught in forest preserves and parks, Pergams and Nyberg consider the second alternative unlikely. Future studies should reveal if the favorable gene is in older mouse specimens held by museums in other parts of the country.

In any event, Pergams thinks this research may have broad implications.

"It suggests that humans are a likely cause of such rapid evolution," Pergams said, "and that much of current phylogenetic and phylogeographi
'"/>

Contact: Paul Francuch
francuch@uic.edu
312-996-3457
University of Illinois at Chicago
21-May-2003


Page: 1 2 3

Related biology news :

1. Half-million dollar landmark achieved for the Methuselah Mouse Prize
2. Mouse study shows NPAS3 and NPAS1 genes may be linked to psychosis
3. Mouse brain stem cells capable of converting into blood vessel cells
4. Mouse study yields clue to why liver is less prone to rejection, say Pitt researchers
5. Mouse embryonic germ cells and male gametes created in the lab
6. Mouse, stripped of a key gene, resists diabetes
7. Mouse model of schizophrenia could speed identification of new antipsychotic drugs
8. Mouse study identifies protective mechanism against alcohol-induced embryo toxicity
9. Mouse model offers new explanation for kidney disease and failure
10. Mouse genetic model for spongiform brain diseases
11. Mouse model links alcohol intake to marijuana-like brain compounds

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Mouse study suggests mammoth evolutionary change

(Date:10/16/2014)... 16, 2014) – Post-menopausal women experienced improvements in ... levels or genital bleeding, after 12 weeks of ... fermented soy germ-based nutritional supplement previously shown to ... new peer-reviewed pilot study reported in a poster ... scientific meeting. , "These data documented improved ...
(Date:10/15/2014)... , Oct. 15, 2014 Sandata Technologies, ... home and community-based care, today announced it released ... Sandata,s Santrax® Electronic Visit Verification™ Solution (EVV™)  for ... a home health company founded in 1996 and ... . The study details the ...
(Date:10/15/2014)... Life, is a non-traditional biophysics textbook and it describes ... a journey of discovery into biological systems and provides ... regulation. It is about how our genes make proteins ... billions of cells in an organism. It quantifies the ... which can be found on both large and small ...
Breaking Biology News(10 mins):S-equol supplements associated with improved measures of reproductive health in postmenopausal women 2Sandata Announces Case Study with Quality Care Services, Inc. 2New book about life as seen from physics 2
(Date:10/25/2014)... Los Angeles, California (PRWEB) October 23, 2014 ... VDRM ), a specialty pharmaceutical company devoted to ... pursuing out-licensing partnerships in 2015. , ViaDerma has ... method, which allows for rapid mass transfer of ... into the body to provide immediate localized therapy. ...
(Date:10/25/2014)... Va. (PRWEB) October 24, 2014 ... the nation’s leading nonprofit authority on the ... healthcare information exchange, announces its appointment of four ... Workgroup. The workgroup leaders include:, , ... ,     Erik Pupo, Specialist Leader, Deloitte Consulting ...
(Date:10/25/2014)... 24, 2014 A new way to ... pitfalls of current skin grafting technologies, it also speeds ... The method, outlined in the October issue of STEM ... deep skin injuries that result from severe burns and ... the skin’s regenerative elements. These wounds heal by contraction, ...
(Date:10/25/2014)... , Oct. 24, 2014  RegeneRx Biopharmaceuticals, Inc. (OTCBB: ... presented at the Fourth International Symposium on Thymosins in ... Italy.  "When thymosin beta 4 (TB4) ... into the peritoneal cavity in a rodent model of ... throughout the brain parenchyma (the functional tissue of the ...
Breaking Biology Technology:ViaDerma, Inc. Announces Plans to Pursue Out-Licensing Partnerships in 2015 2ViaDerma, Inc. Announces Plans to Pursue Out-Licensing Partnerships in 2015 3WEDI Appoints Four New Security and Privacy Workgroup Co-chairs 2New engineering method shows promise for faster healing, more cosmetically appealing skin grafts 2New engineering method shows promise for faster healing, more cosmetically appealing skin grafts 3Researchers Report Thymosin Beta 4 Crosses Blood-Brain Barrier In Animal Stroke Model 2
Cached News: