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:5/26/2016)... Illinois (PRWEB) , ... May 26, 2016 , ... ... with women’s basketball as a partner for the Tamika Catchings Legacy Tour ... As the industry leader in hardwood basketball surfaces in all forms and levels of ...
(Date:5/26/2016)... ... 2016 , ... The Woodlands at John Knox Village , Florida’s first ... for living and healing, celebrated its grand opening, today. The Woodlands at John Knox ... by Empowered Staff. , “This is an incredibly fulfilling time for John Knox Village ...
(Date:5/26/2016)... TN (PRWEB) , ... May 26, 2016 , ... There ... and more than 32 million cancer survivors worldwide. On Sunday, June 5, 2016, communities ... 29th annual National Cancer Survivors Day®. , National Cancer Survivors Day® is an ...
(Date:5/26/2016)... ... May 26, 2016 , ... Catalent Pharma ... drugs, biologics, consumer health and global clinical supply services, today announced two key ... the company’s continued investment and strategic growth plans in the Asia Pacific region. ...
(Date:5/26/2016)... ... May 26, 2016 , ... An April Gallup survey found rising health care ... of Sun Health Senior Living (SHSL) may not share those same worries ... prescription copays for the year, while holding the line on increasing their contributions, including ...
Breaking Medicine News(10 mins):
(Date:5/24/2016)... CHRISTCHURCH, New Zealand , May 24, 2016 ... scanning and informatics solutions for the healthcare sector, has been ... the New Zealand Hi-Tech Awards 2016. Dr ... a fantastic acknowledgement for our team.  It,s really good to ... the burden healthcare internationally. Our products are used in 35 ...
(Date:5/24/2016)... -- The innovator of COMBO ... s first dual therapy stent, introduces catheters for lower ... a global company specializing in the provision of life-changing ... to treat peripheral artery disease. The JADE™ and Scoreflex™ ... lower limb and arteriovenous (AV) fistula intervention. ...
(Date:5/24/2016)... Dutch surgeons have launched a ground-breaking medical app to help ... on a global scale. Medical professionals from Europe ... and the US have already signed up for the app, which ... secure environment. Education  "Imagine a doctor for ... surgeon at Harvard to treat a bomb victim via live streaming ...
Breaking Medicine Technology:
Cached News: