Navigation Links
Alzheimer's vaccine clears plaque but has little effect on learning and memory impairment
Date:4/4/2008

Irvine, Calif., April 4, 2008 -- A promising vaccine being tested for Alzheimer's disease does what it is designed to do -- clear beta-amyloid plaques from the brain -- but it does not seem to help restore lost learning and memory abilities, according to a University of California, Irvine study.

The findings suggest that treating the predominant pathology of Alzheimer's disease -- beta-amyloid plaques -- by itself may have only limited clinical benefit if started after there is significant plaque growth. However, a combination of vaccination with therapies that also target related neuron damage and cognitive decline may provide the best treatment opportunity for people with this neurodegenerative disease. Study results appear in the April 2 issue of the Journal of Neuroscience.

"We've found that reducing plaques is only part of the puzzle to treat Alzheimer disease," said study leader, UC Irvine neurobiologist Elizabeth Head. "Vaccines such as this one are a good first step for effective Alzheimer's treatment, but complimentary treatments must be developed to address the complexity of the disease."

Head and colleagues studied for a two-year period in aging canines the effect of a vaccine that is currently under clinical development for treating patients with Alzheimer's disease. The vaccine contains the beta-amyloid 1-42 protein and stimulates the immune system to produce antibodies against this same protein that is in the brain plaques. Dogs are used for such studies because beta-amyloid plaques grow naturally in their brains and they exhibit cognitive declines similar to those seen in humans.

After the aged dogs with beta-amyloid-plaque growth were immunized (which is similar to starting a treatment in patients with Alzheimer's disease), the researchers found, in comparison with non-treated aged dogs, little difference in the results of behavioral tests that measure cognitive loss. Later, brain autopsies showed that although plaques had been cleared from multiple brain regions -- including the entorhinal cortex, a region of the brain involved with learning and memory and primarily affected by Alzheimer's -- damaged neurons remained.

Head said this discovery helps explain why there was little difference in the behavioral test results between immunized and nonimmunized dogs. In addition, she added, it implies that after clearing beta-amyloid plaques from the brain, the next step is to repair these neurons. This approach will be critical for treating and reversing the effects of the Alzheimer's disease.

Currently, Head and her colleagues are developing approaches to repair these damaged neurons and hope to test them clinically.


'/>"/>

Contact: Tom Vasich
tmvasich@uci.edu
949-824-6455
University of California - Irvine
Source:Eurekalert

Related medicine news :

1. Alzheimers Research Target May Be a Dead End
2. FDA OKs New Rotavirus Vaccine
3. Vaccine Induced Inflammation Linked to Epidemic of Type 2 Diabetes and Metabolic Syndrome
4. FDA APPROVES ROTARIX(R) [Rotavirus Vaccine, live, oral], THE FIRST VACCINE LICENSED TO COMPLETE THE ROTAVIRUS IMMUNIZATION SERIES BY FOUR MONTHS OF AGE
5. Clinical trial will test new HIV/AIDS vaccine
6. Researchers Successfully Test Ebola Vaccines
7. MITOCHONDRIAL DYSFUNCTION, VACCINES AND AUTISM: 1 in 50 Children Could Be at Risk
8. HIV Vaccine Funding: Enough is Enough, Says AHF in Baltimore Sun
9. NIAID to convene HIV Vaccine Summit
10. Study Finds Single Dose of Iomai Patch With Pandemic Flu Vaccine Achieves Protective Levels
11. UNC, Harvard develop inhaled TB vaccine
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/12/2016)... ... February 12, 2016 , ... Young Asset Protection, ... the beginning of the latest charity campaign in their community enrichment program. Art ... to this worthy cause are currently being accepted at: http://artexpressioninc.org/ . , ...
(Date:2/12/2016)... ... February 12, 2016 , ... J Thomas & Associates ... it’s commitment to act as Agents of Change in the community, announces a ... homeless families to fulfill immediate needs and help them move into permanent housing. ...
(Date:2/12/2016)... Pa. (PRWEB) , ... February 12, 2016 , ... ... sort through a world of exterior design possibilities. CertainTeed, North America’s leading brand ... tools by expanding the product offerings showcased in the mobile version of the ...
(Date:2/12/2016)... SAN LUIS OBISPO, Calif. (PRWEB) , ... February 12, 2016 , ... The Central Coast ... purpose of this dance is to provide a night of fun for teens with and ... to help everyone feel welcomed and included at the event. The dance will take place ...
(Date:2/12/2016)... CA (PRWEB) , ... February 12, 2016 , ... ... Film Studios. The new cartoon style themes are great for showcasing pictures, videos as ... customized scene generators, titles like introductions, lower thirds, transitions and a beautiful frame overlay. ...
Breaking Medicine News(10 mins):
(Date:2/11/2016)... 2016 AAIPharma Services Corp./Cambridge Major Laboratories, ... and development services for the pharmaceutical and biotechnology ... capacity in its Charleston, SC ... several recent investments. Charleston ... line with small-scale lyophilization. The site has invested ...
(Date:2/11/2016)... ANKENY, Iowa , 11 de fevereiro de ... a inauguração de sua fábrica de soroalbumina bovina ... Nova Zelândia. A fábrica fica na Ilha Norte ... Loop "), desenvolvido e estabelecido na fábrica da ... Iowa . O projeto e instalação dos ...
(Date:2/11/2016)... Breast Cancer Therapeutics in Asia-Pacific Markets ... (APAC) breast cancer market will experience considerable expansion ... at a Compound Annual Growth Rate (CAGR) of 8.5%. ... - states that the Asia-Pacific ... billion in 2014 to $3.4 billion by 2021, at a ...
Breaking Medicine Technology: