Navigation Links
Same Genes Key to Early & Late-Onset Alzheimer's: Study
Date:2/2/2012

THURSDAY, Feb. 2 (HealthDay News) -- People who develop Alzheimer's disease late in life may have the same gene mutations linked to the inherited, early onset form of the condition, according to a new study.

Researchers from Washington University School of Medicine in St. Louis suggested this could lead to changes in the way Alzheimer's disease is classified.

"It's always been somewhat arbitrary, figuring out where early onset ends and late-onset begins. So I no longer look at early- and late-onset disease as being different illnesses. I think of them as stages along a continuum," said the study's senior investigator, Alison Goate, in a university news release. "I think it's reasonable to assume that at least some cases among both early- and late-onset disease have the same causes."

People who develop Alzheimer's at a younger age probably have more risk factors and fewer protective factors for the brain disorder than those who develop it later in life, Goate noted. In both age groups, however, the disease mechanism may be identical, she explained.

In conducting their research, published online Feb. 1 in PLoS One, researchers studied the genetic information of 440 families that had at least four relatives diagnosed with Alzheimer's disease.

Specifically, they analyzed five genes associated with dementia. Mutations in three of the genes they examined are a known cause of early-onset Alzheimer's disease. The other two genes studied have been linked to another form of inherited dementia, called frontotemporal dementia.

The investigators found rare variants in Alzheimer's-related genes in 13 percent of the samples analyzed.

"Changes in these genes were more common in Alzheimer's cases with a family history of dementia, compared to normal individuals. This suggests that some of these gene variants are likely contributing to Alzheimer's disease risk," said Goate, who is also co-director of the Hope Center Program on Protein Aggregation and Neurodegeneration.

According to the study's first author, Carlos Cruchaga, an assistant professor of psychiatry, "of those rare gene variants, we think about 5 percent likely contribute to Alzheimer's disease. That may not seem like a lot, but so many people have the late-onset form of Alzheimer's that even a very small percentage of patients with changes in these genes could represent very large numbers of affected individuals," he explained in the news release. "

The study authors also pointed out that they discovered some of the gene mutations associated with frontotemporal dementia in Alzheimer's patients, suggesting these patients were actually misdiagnosed.

The researchers suggested doctors should screen for genetic mutations among their patients with late-onset Alzheimer's who have strong family histories of the disease.

More information

The U.S. National Library of Medicine has more about Alzheimer's disease.

-- Mary Elizabeth Dallas

SOURCE: Washington University School of Medicine in St. Louis, news release, Feb. 1, 2012


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Genes linked to cancer could be easier to detect with liquid lasers
2. Mutations in 2 Genes Linked to Rare Autism-Related Disorder
3. Genes and timing of menopause
4. Inflammatory mediator promotes colorectal cancer by stifling protective genes
5. Your Taste for Fat May Reside in Your Genes
6. Tracking genes remote controls
7. Most Parents Tell Kids About Test Results for Breast Cancer Genes
8. Most parents who get tested for breast cancer genes share results with their children
9. Positive feedback and tumorigenesis
10. New book on angiogenesis from Cold Spring Harbor Laboratory Press
11. Researchers discover patterns of genes associated with timing of breast cancer recurrences
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Same Genes Key to Early & Late-Onset Alzheimer's: Study
(Date:12/8/2016)... ... 2016 , ... David J. Dykeman , Ginger Pigott , and ... speak at DeviceTalks West, Dec. 12, 2016, at the Fairmont Newport Beach in California. ... firm’s global Life Sciences & Medical Technology Group have been featured speakers at every ...
(Date:12/8/2016)... Tampa, Fla (PRWEB) , ... December 08, 2016 ... ... offering smarter modes of access for customers and employees that are both engaging ... ChangeGear 7 with Service Smart Technology, the software company revealed today its plans ...
(Date:12/8/2016)... ... 2016 , ... Catalent Pharma Solutions, the leading global provider ... products, today announced that it had joined the Pharmaceutical Supply Chain Initiative (PSCI). ... unite pharmaceutical and healthcare companies that share a vision of better, social, environmental ...
(Date:12/8/2016)... ... December 08, 2016 , ... STAT courier is pleased ... a convenient service for Texas, they are expanding their presence in Dallas. One of ... spree that will bring new jobs to the Dallas and Forth Worth market. STAT ...
(Date:12/8/2016)... ... December 08, 2016 , ... Today’s patients are encouraged to ... mind, SIGVARIS has created a new line of anti-embolism stockings to help prevent ... the benefits of graduated compression when transitioning from recovery to early rehabilitation. , ...
Breaking Medicine News(10 mins):
(Date:12/8/2016)... AMSTERDAM , December 8, 2016 Information ... TM metrics in Scopus , the world,s largest ... free access to comprehensive metrics for journals from over 5,000 publishers. ... publish, which journals to subscribe to and when to adjust a ... , , ...
(Date:12/8/2016)... 2016 According to the research report, ... is expected to be worth US$9.7 bn by the ... Between the forecast years of 2016 and 2024, the global ... The leading players operating in the global diabetes injection pens ... plc., Biocon Ltd., and Sanofi S.A. Transparency Market Research reports ...
(Date:12/8/2016)... 2016 According to a new market research report ... Therapeutic (Pain, Insulin)), End Use (Sports, Fitness, RPM), Type (Smart watch, Patch), ... global market, in terms of value, is projected to reach 12.14 Billion ... 18.0% during the forecast period. Continue Reading ... ...
Breaking Medicine Technology: