HOME >> MEDICINE >> NEWS
New method shows that neocortical nerve cells are not renewed

Most bodily organs continually die and regrow a little at a time. It takes two years, for example, for all the cells of the liver to be replaced by fresh ones. Research from Karolinska Institutet in Sweden now shows that there is one important exception to this the nerve cells of the brain remain the same throughout a person's life.

Many scientists have suspected that the cerebral nerve cells lack this renewal ability. However, studies on apes and rodents have indicated that brain cells can reform in mammals after all including man. One problem with these findings has been the research methodology, as the most common way of measuring the age of nerve cells is extremely complicated, especially in man, and gives unreliable and controversial results.

Last year, stem cell researcher Jonas Frisn from Karolinska Institutet presented a way to settle the issue with help from unexpected quarters the nuclear tests of the cold war. He used a variation on the well-known carbon-14 method that is based on the fact that atmospheric concentrations of C14 peaked sharply during the cold war tests. By comparing levels of C14 in plant and animal cells with atmospheric levels, it is possible to pinpoint the exact time the cells were born.

Jonas Frisn has now teamed up with another Swedish research group from Gteborg University, led by Dr. Peter Eriksson, and scientists from Australia and America to measure levels of C14 in neocortical nerve cells from all the cerebral lobes of adult individual brains. They have been able to show that levels of C14 in the nerve cells from all areas of the cerebral cortex were just as high as the atmospheric levels at the time of the individual's birth. Put another way, no cell division had taken place in the neocortex during the person's life from infancy to adulthood.

The researchers stress that the method has certain limitations. For instance, newly formed nerve cells might remain undetected if they have m
'"/>

Contact: Katarina Sternudd
katarina.sternudd@ki.se
46-852-483-895
Karolinska Institutet
11-Aug-2006


Page: 1 2

Related medicine news :

1. New oxidation methods streamline synthesis of important compounds
2. U of M researchers discover new method to combat HIV
3. New prevention, treatment methods for patients with painful bowel inflammation
4. Scientists develop method to track immune system enzyme in live animals
5. VA should revise its methods for evaluating and rating PTSD in veterans
6. Northwestern chemists develop new method for synthesizing anti-cancer flavonoids
7. Scientists develop method to remove prion infectivity from scrapie-infected blood
8. PhD researcher develops inexpensive, sustainable production method in just 2 years
9. Researchers develop novel method for treatment of sickle cell disease
10. Developing better methods of blinding doctors and patients in clinical trials
11. Cancer survival compromised by poor staging methods

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


(Date:9/22/2017)... ... 2017 , ... After a long health ordeal that involved ... on life with assistance from CreditAssociates. CreditAssociates provides debt relief and debt settlement ... The senior is one of the satisfied clients who expressed their appreciation for ...
(Date:9/22/2017)... ... September 22, 2017 , ... Pullano Law Offices, a Chicago personal injury ... has been selected to serve as President of the North Suburban Bar Association for ... Award Dinner hosted by the NSBA at the North Shore Country Club in Glenview, ...
(Date:9/22/2017)... ... 2017 , ... "Success Files," a short- and long-form documentary ... a disease estimated to affect the lives of more than 5 million Americans ... a leading voice in the fight for cure and research into the disease, ...
(Date:9/22/2017)... ... September 22, 2017 , ... ... products at customers’ doorstep. According to Smart Mart, customers can now order vegetable, ... offer wearable, and customers can find clothing at discounted prices. Apart from this, ...
(Date:9/21/2017)... Naples, FL (PRWEB) , ... September 21, 2017 , ... ... , Aesthetic Surgery Center in Naples, Florida is pleased to announce that Plastic Surgeon ... Business Top 40 Under 40 is an annual award that was started ...
Breaking Medicine News(10 mins):
(Date:9/19/2017)... -- HistoSonics, Inc., a venture-backed medical device company developing a non-invasive, robotically assisted, platform therapy ... team developments today:   ... ... Tom Tefft ... Veteran medical device executive Josh Stopek , PhD, who has led R&D ...
(Date:9/12/2017)... Sept. 12, 2017   EcoVadis , the leading platform for environmental, ... first annual edition of its Global CSR Risk and Performance Index. The ... EcoVadis, based on Scorecard Ratings that analyzed nearly 800,000 data points across ... ... ...
(Date:9/9/2017)... -- Eli Lilly and Company (NYSE: LLY ) ... lasmiditan, an investigational, oral, first-in-class molecule for the acute ... to placebo in the Phase 3 SPARTAN study. Detailed ... of the International Headache Society (IHC) in ... demonstrate lasmiditan,s potential to reduce pain and provide freedom ...
Breaking Medicine Technology:
Cached News: