Navigation Links
Active Life Decelerates Alzheimer's

Researchers have disclosed the mechanism by which environmental stimulation decelerates Alzheimer's disease, further affirming that increased mental and physical activity //retards neurological decline.

A paper to this effect presented by Ambrée et al., "Reduction of amyloid angiopathy and A? plaque burden after enriched housing in TgCRND8 mice: involvement of multiple pathways," appears in the2006 August issue of The American Journal of Pathology.

Alzheimer's disease, the leading cause of senile dementia, presents with cognitive and behavioral deficiencies resulting in part from accumulation of amyloid? (A?) deposits within the brain (A? plaques) and its blood vessels (amyloid angiopathy). Although previous studies have shown that increased mental and physical activity can slow the progression of the disease, how such deceleration occurs has been unclear until now.

Dr. Kathy Keyvani's group at University Hospital Muenster examined the effects of environmental stimulation on the brain pathology of TgCRND8 mice. These mice, which express a mutant form of A? found in some Alzheimer's patients, develop Alzheimer-like features including A? plaques and cognitive deficits. To study the effects of enrichment, mice were housed in either standard cages or enriched cages, similar to the standard but with access to a stimulus cage containing permanent fixtures (rope and gnawing wood) as well as removable items (tunnels, balls, ladders, ramps, and exercise wheels) that were changed on a rotating basis.

Following five months of standard versus enriched housing, mouse brains were examined for signs of disease. Mice housed in the enriched environment had fewer A? plaques, smaller plaque size, and reduced amyloid angiopathy compared to mice housed in standard cages. Interestingly, there were no differences in the levels of soluble A? peptide or the transcriptional/translational expression levels of its precursor protein (APP) or the processing of APP between the two groups. So how did environmental stimulation prevent disease?

To answer this question, Ambrée et al. performed DNA microarray analysis to determine which genes were differentially regulated in mice housed in the enriched environment compared to standard cages. Enriched mice exhibited down-regulation of pro-inflammatory genes but up-regulation of genes related to anti-inflammatory processes, protein degradation and cholesterol binding. These results were confirmed by specifically analyzing gene expression for examples in each category. Together these data suggest that an enriched environment elicits protection via pathways that prevent A? accumulation and enhance its clearance.

The authors speculate that the altered expression of inflammatory genes may shift the immune response from one that is neurotoxic to one that is phagocytic, i.e., able to clear unwanted debris, such as A?. In accordance with this, a significant enhancement of microglial activity was found by Western blot and morphometric analyses of microglia, which often surround and infiltrate A? plaques. In addition, activating cellular protein degradation pathways provides another means of removing excess A?. Finally, changes in cholesterol homeostasis, elements of which have been shown to correlate with A? deposition, may exert beneficial effects by preventing plaque formation in the first place.

These data provide strong evidence that an environment rich in mental and physical stimulation slows the progression of Alzheimer-like brain pathology. Further investigation of the pathways and individual elements involved in such protection may provide novel treatment strategies for Alzheimer's disease. Until that time, keep your running shoes and crossword puzzles handy.

Source:eurekalert
'"/>




Related medicine news :

1. Importance of An Active Lifestyle
2. Importance of An Active Lifestyle
3. Adolescents Who Walk To School Are Fitter, More Active
4. Active Lifestyle Helps To Slowdown Illness In Alzheimers Patients
5. Youth Becoming Sexually Active At A Younger Age
6. Being Active In Winter Despite That Inner Urge
7. Brain Is More Active While Hiding The Truth, Reveals fMRI Imaging
8. "Active" Brain Makes Rational Decisions!!
9. Church to Have an Active Role in the Prevention of AIDS
10. Advance Australia Active – AM
11. Adolescent Girls More Active If Neighborhoods Have Parks
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/29/2016)... ... 2016 , ... In an article published April 16th on the ... and lip injections, which she underwent in order to feel more at home at ... Festival. The article explains that Ms. Mirmelli’s situation is not unique; many plastic surgeons ...
(Date:4/29/2016)... ... April 29, 2016 , ... Shamangelic ... the addition Onnit brand Alpha BRAIN and New Mood Daily-Stress Formula for brain ... mood optimization products to the store is just one more way Shamangelic Healing ...
(Date:4/29/2016)... ... April 29, 2016 , ... The American workforce is on ... security. Most importantly, employees are the single most important asset in creating value ... unhappy? , Just under half of American workers are emotionally checked out with ...
(Date:4/29/2016)... ... , ... Conditions were ideal for Global Lyme Alliance’s (GLA) 2nd annual “Bite ... a light breeze and temperatures in the 60s. Over 400 runners, walkers and volunteers ... and 1-mile walk were held to increase awareness about Lyme disease and to ...
(Date:4/29/2016)... ... April 29, 2016 , ... Spine Team Texas, a comprehensive spine physician ... one of their physicians has been invited to be a featured speaker at the ... Review conference on April 30, 2016. , Dr. R. Scott McPherson, a physical ...
Breaking Medicine News(10 mins):
(Date:4/27/2016)... Switzerland , April 27, 2016 ... AG announced the launch of a Phase 2 clinical ... residual hearing in patients undergoing cochlear implantation (CI) surgery. ... recruiting patients in Germany and ... into the middle ear at the time of surgery. ...
(Date:4/26/2016)... 26, 2016 Hill-Rom Holdings, Inc. (NYSE: ... at the Deutsche Bank 41 st Annual Health Care ... You are invited to listen to the live ... access it directly at http://edge.media-server.com/m/p/mr4uxgas . A recorded replay ... of the live event and accessible at the links above ...
(Date:4/26/2016)... , April 27, 2016 Research ... "Global Molecular Diagnostics Market 2016-2020" report to their ... , ,The global molecular diagnostics market is projected to ... 2016-2020. Molecular diagnostics is a technique that ... the molecular level to detect changes in biochemical pathways. ...
Breaking Medicine Technology: