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:
TAG: New method shows that neocortical nerve cells are not renewed

(Date:11/26/2014)... (PRWEB) November 26, 2014 One of ... face at some point in her life is choosing ... an excellent platform for ladies to purchase high quality ... blue bridesmaid dresses. People now can pick their suitable ... beautiful, chic dresses always make ladies look scintillating and ...
(Date:11/26/2014)... have developed highly specialized ways of dealing with the ... report. The new research investigated the different types ... guts of 50 turkey vultures and black vultures in ... vultures had more than 500 different types of microorganisms, ... The findings suggest that a vulture,s digestive system ...
(Date:11/26/2014)... 2014 (HealthDay News) -- The number of emergency department visits ... 2010 to a record 136 million in 2011, according to ... findings also showed that fewer people were going to ERs ... as needing medical care within two hours of arriving at ... to the research. Sixty percent of patients arrived at ...
(Date:11/26/2014)... Steven Reinberg HealthDay Reporter ... Tuesday by the U.S. Food and Drug Administration will have ... the rules even apply to movie theater popcorn and ice ... their calories away from home, often consuming less nutritious food ... Hamburg said during a Monday afternoon news conference. ...
(Date:11/26/2014)... TUESDAY, Nov. 25, 2014 (HealthDay News) -- Parents need ... from sports concussions, an expert warns. Parents must ... and undergo standard, Dr. David Dodick, chair of the ... the Mayo Clinic College of Medicine in Scottsdale, Ariz. ... news release. Any coach involved with teens ...
Breaking Medicine News(10 mins):Health News:Royal Blue Bridesmaid Dresses Now Are Available for Christmas at BellasDress.com 2Health News:ER Visits on the Rise, Study Reports 2Health News:Calorie Counts Mandated at Chain Restaurants, FDA Says 2Health News:Calorie Counts Mandated at Chain Restaurants, FDA Says 3Health News:Parents Need to Take Lead on Teen Concussion Prevention 2
(Date:11/26/2014)... , Nov. 26, 2014 / -- China Nepstar Chain Drugstore ... a leading retail drugstore chain in China ... stores, today announced the appointment of Ms. Rebecca ... effective immediately. Ms.Zhang has over 20 ... Nepstar in March 1999. Prior to Ms. Zhang,s appointment ...
(Date:11/24/2014)... 24, 2014  CryoLife, Inc. (NYSE: CRY ), ... cardiac and vascular surgery, announced today that it will participate ... Conference on Wednesday, December 3, 2014 at The New York ... A live webcast of the Company,s presentation is ... an overview of the company by Pat Mackin , ...
(Date:11/24/2014)... 24, 2014 Juno Therapeutics today announced ... to the company,s JCAR015 chimeric antigen receptor product ... relapsed or refractory B-cell acute lymphoblastic leukemia and ... Kettering Cancer Center, where Phase 1 clinical trials ... action is important news for patients who may ...
Breaking Medicine Technology:China Nepstar Chain Drugstore Appoints Ms. Rebecca Yingnan Zhang as Chief Operating Officer 2China Nepstar Chain Drugstore Appoints Ms. Rebecca Yingnan Zhang as Chief Operating Officer 3CryoLife to Present at 26th Annual Piper Jaffray Healthcare Conference 2CryoLife to Present at 26th Annual Piper Jaffray Healthcare Conference 3Juno T Cell Therapy For Leukemia Granted FDA Breakthrough Therapy Designation 2Juno T Cell Therapy For Leukemia Granted FDA Breakthrough Therapy Designation 3
Cached News: