Featured Research

from universities, journals, and other organizations

Fetal Cells Used To Treat Parkinson's Disease May Not Function Long Term, Study Suggests

Date:
April 7, 2008
Source:
Rush University Medical Center
Summary:
Neurons grafted into the brain of a patient with Parkinson's disease fourteen years ago have developed Lewy body pathology, the defining pathology for the disease, according to new research in Nature Medicine.

Neurons grafted into the brain of a patient with Parkinson’s disease fourteen years ago have developed Lewy body pathology, the defining pathology for the disease, according to research by Jeffrey H. Kordower, PhD, and associates and published in the April 6 issue of Nature Medicine.

The finding suggest that Parkinson’s disease is an ongoing process that can affect cells grafted into the brain in the same way the disease affects host dopamine neurons in the substantia nigra of the brain, according to Kordower, who is the lead author of the study and a neuroscientist at Rush University Medical Center.

“These findings give us a bit of pause for the value of cell replacement strategy for Parkinson’s disease,” said Kordower. “We still need to vigorously investigate this approach among the full armament of surgically-delivered Parkinson’s disease therapies. While it is not clear to us whether the same fate would befall stem cell grafts, the next generation of cell replacement procedures, this study does suggest that grafted cells can be affected by the disease process.”

The collaborative research study described in the article involves Rush, Mt. Sinai School of Medicine, New York, and the University of South Florida, Tampa, In it, individuals with Parkinson’s disease received fetal cell transplants to reverse the loss in the brain of striatal dopamine.

The individual described in this article was a woman with a 22-year history of Parkinson’s disease who underwent transplantation in 1993. After transplantation she experienced improvements in disease symptoms as measured by the Unified Parkinson Disease Rating Scale (UPDRS) and required substantially lower doses of antiparkinsonian medications. Her UPDRS scores remained improved into1997, but by 2004, she experienced progressive worsening of Parkinson’s disease symptoms. She died in 2007 and her brain and that of two other patients in the study were comprehensively processed and analyzed. She had the longest survival after transplantation that had been reported to date among this study’s participants.

Double-blind, sham-controlled studies that followed did not establish clinical benefit although significant improvement was observed in a subpopulation of patients. Post mortem studies of individuals in these studies showed a robust survival of grafted neurons, suggesting that the cells were not affected by Parkinson’s disease as Kordower explains “Because Parkinson’s disease pathology progresses over decades, we think that the individuals did not live long enough for the Parkinson’s disease pathology to develop in the grafted cells.”

Scientists have long debated whether Parkinson’s disease results from an acute insult or event, or whether it is an ongoing pathological process that continues to affect healthy neurons, according to Kordower. This research indicates that mechanisms and molecules responsible for initiating the degenerative process are still present at a late stage and are capable of affecting grafted neurons. In addition, the processes that destroy dopamine neurons are not restricted to the midbrain.

“The findings also suggest that there may be either a pathogenic factor in the brain that affects dopamine producing neurons or a pathological process that can spread from one cellular system to another,” said Kordower. “These findings have striking implications for understanding what causes PD and the potential for cell replacement strategies to reverse the motor symptoms.”


Story Source:

The above story is based on materials provided by Rush University Medical Center. Note: Materials may be edited for content and length.


Cite This Page:

Rush University Medical Center. "Fetal Cells Used To Treat Parkinson's Disease May Not Function Long Term, Study Suggests." ScienceDaily. ScienceDaily, 7 April 2008. <www.sciencedaily.com/releases/2008/04/080406153348.htm>.
Rush University Medical Center. (2008, April 7). Fetal Cells Used To Treat Parkinson's Disease May Not Function Long Term, Study Suggests. ScienceDaily. Retrieved July 28, 2014 from www.sciencedaily.com/releases/2008/04/080406153348.htm
Rush University Medical Center. "Fetal Cells Used To Treat Parkinson's Disease May Not Function Long Term, Study Suggests." ScienceDaily. www.sciencedaily.com/releases/2008/04/080406153348.htm (accessed July 28, 2014).

Share This




More Health & Medicine News

Monday, July 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

$15B Deal on Vets' Health Care Reached

$15B Deal on Vets' Health Care Reached

AP (July 28, 2014) A bipartisan deal to improve veterans health care would authorize at least $15 billion in emergency spending to fix a veterans program scandalized by long patient wait times and falsified records. (July 28) Video provided by AP
Powered by NewsLook.com
Traditional African Dishes Teach Healthy Eating

Traditional African Dishes Teach Healthy Eating

AP (July 28, 2014) Classes are being offered nationwide to encourage African Americans to learn about cooking fresh foods based on traditional African cuisine. The program is trying to combat obesity, heart disease and other ailments often linked to diet. (July 28) Video provided by AP
Powered by NewsLook.com
West Africa Gripped by Deadly Ebola Outbreak

West Africa Gripped by Deadly Ebola Outbreak

AFP (July 28, 2014) The worst-ever outbreak of the deadly Ebola epidemic grips west Africa, killing hundreds. Duration: 00:48 Video provided by AFP
Powered by NewsLook.com
Trees Could Save More Than 850 Lives Each Year

Trees Could Save More Than 850 Lives Each Year

Newsy (July 27, 2014) A national study conducted by the USDA Forest Service found that trees collectively save more than 850 lives on an annual basis. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins