Navigation Links
Vitamin D, omega-3 may help clear amyloid plaques found in Alzheimer's
Date:2/5/2013

A team of academic researchers has pinpointed how vitamin D3 and omega-3 fatty acids may enhance the immune system's ability to clear the brain of amyloid plaques, one of the hallmarks of Alzheimer's disease.

In a small pilot study published in the Feb. 5 issue of the Journal of Alzheimer's Disease, the scientists identified key genes and signaling networks regulated by vitamin D3 and the omega-3 fatty acid DHA (docosahexaenoic acid) that may help control inflammation and improve plaque clearance.

Previous laboratory work by the team helped clarify key mechanisms involved in helping vitamin D3 clear amyloid-beta, the abnormal protein found in the plaque. The new study extends the previous findings with vitamin D3 and highlights the role of omega-3 DHA.

"Our new study sheds further light on a possible role for nutritional substances such as vitamin D3 and omega-3 in boosting immunity to help fight Alzheimer's," said study author Dr. Milan Fiala, a researcher at the David Geffen School of Medicine at UCLA.

For the study, scientists drew blood samples from both Alzheimer's patients and healthy controls, then isolated critical immune cells called macrophages from the blood. Macrophages are responsible for gobbling up amyloid-beta and other waste products in the brain and body.

The team incubated the immune cells overnight with amyloid-beta. They added either an active form of vitamin D3 called 1alpha,25dihydroxyvitamin D3 or an active form of the omega-3 fatty acid DHA called resolvin D1 to some of the cells to gauge the effect they had on inflammation and amyloid-beta absorption.

Both 1alpha, 25-dihydroxyvitamin D3 and resolvin D1 improved the ability of the Alzheimer's disease patients' macrophages to gobble-up amyloid-beta, and they inhibited the cell death that is induced by amyloid-beta. Researchers observed that each nutrition molecule utilized different receptors and common signaling pathways to do this.

Previous work by the team, based on the function of Alzheimer's patients' macrophages, showed that there are two groups of patients and macrophages. In the current study, researchers found that the macrophages of the Alzheimer's patients differentially expressed inflammatory genes, compared with the healthy controls, and that two distinct transcription patterns were found that further define the two groups: Group 1 had an increased transcription of inflammatory genes, while Group 2 had decreased transcription. Transcription is the first step leading to gene expression.

"Further study may help us identify if these two distinct transcription patterns of inflammatory genes could possibly distinguish either two stages or two types of Alzheimer's disease," said study author Mathew Mizwicki, an assistant researcher at the David Geffen School of Medicine at UCLA.

While researchers found that 1alpha,25-dihydroxyvitamin D3 and resolvin D1 greatly improved the clearance of amyloid-beta by macrophages in patients in both groups, they discovered subtleties in the effects the two substances had on the expression of inflammatory genes in the two groups. In Group 1, the increased-inflammation group, macrophages showed a decrease of inflammatory activation; in Group 2, macrophages showed an increase of the inflammatory genes IL1 and TLRs when either 1alpha,25-Dihydroxyvitamin D3 or resolvin D1 were added.

More study is needed, Fiala said, but these differences could be associated with the severity of patients' nutritional and/or metabolic deficiencies of vitamin D3 and DHA, as well as the omega-3 fatty acid EPA (eicosapentaenoic acid).

"We may find that we need to carefully balance the supplementation with vitamin D3 and omega-3 fatty acids, depending on each patient in order to help promote efficient clearing of amyloid-beta," Fiala said. "This is a first step in understanding what form and in which patients these nutrition substances might work best."

According to Fiala, an active (not oxidized) form of omega-3 DHA, which is the precursor of the resolvin D1 used in this study, may work better than more commercially available forms of DHA, which generally are not protected against the oxidation that can render a molecule inactive.

The next step is a larger study to help confirm the findings, as well as a clinical trial with omega-3 DHA, the researchers said.


'/>"/>

Contact: Rachel Champeau
rchampeau@mednet.ucla.edu
310-794-2270
University of California - Los Angeles Health Sciences
Source:Eurekalert

Related medicine news :

1. Vitamin E in diet protects against many cancers
2. Researchers determine vitamin D blood level for reducing major medical risks in older adults
3. Vitamin K2: New hope for Parkinsons patients?
4. Experts call for clinical trials to test non-skeletal benefits of vitamin D
5. Vitamin D + TB vaccine: Allies in fight against bladder cancer?
6. Vitamin C improves pulmonary function in newborns of pregnant smoking women
7. Vitamin C improves lung function in newborns of pregnant smoking women
8. Japanese-American Men With Low Vitamin-D Diet Face Higher Stroke Risk
9. Too much vitamin D can be as unhealthy as too little
10. Older adults may need more vitamin D to prevent mobility difficulties
11. Older Women Should Not Take Calcium, Vitamin D: Task Force
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/26/2016)... ... May 26, 2016 , ... There are many ways to cook a hot ... suggests that Americans prefer their dogs straight off the grill. Of the 90 percent ... favorite way to cook a hot dog, far outpacing other cooking methods such as ...
(Date:5/26/2016)... ... , ... Connor Sports, through its Connor Cares initiative, will continue ... Catchings Legacy Tour that will commemorate the Indiana Fever legend’s hall-of-fame career and ... forms and levels of the game, Connor Sports has committed to a significantly increased ...
(Date:5/26/2016)... ... ... MadgeTech will be showcasing its line of data logging products , ... MadgeTech headquarters. With products sold in more than 100 countries around the world, MadgeTech ... , In 2012, NASA strategically set up 17 RHTemp101A MadgeTech data loggers around ...
(Date:5/26/2016)... ... May 26, 2016 , ... Memorial Day Weekend marks the ... Insurance is sharing tips to make sure your family and vehicle are ready ... Safety Council, there may be 439 deaths and an additional 50,500 serious injuries from ...
(Date:5/26/2016)... Rafael, CA (PRWEB) , ... May 26, 2016 ... ... will be offering campers a multitude of activities from daily practices, arts & ... self-confidence. , Camp Directors Amber East-D’Anna and Christy Evans have combined backgrounds in ...
Breaking Medicine News(10 mins):
(Date:5/25/2016)... May 25, 2016 MedDay, a biotechnology ... that an oral presentation entitled "High doses of biotin in ... will be given by Professor Ayman Tourbah , Principal ... of the European Academy of Neurology (EAN) in ... disorders 3" will take place on Sunday, 29 May 2016 ...
(Date:5/24/2016)... 24, 2016   ... primären Endpunkte und demonstriert Ebenbürtigkeit bei ... ‚ausgezeichneter plus guter , ...      (Logo: http://photos.prnewswire.com/prnh/20130829/633895-a ) ... positive Daten von der MORA-Studie der Phase III ...
(Date:5/24/2016)... May 24, 2016 Celsion Corporation (NASDAQ: ... company, today provided an update on its ongoing ... trial combining GEN-1, the Company,s DNA-based immunotherapy, with ... newly-diagnosed patients with advanced ovarian cancer who will ... GEN-1 is an IL-12 DNA plasmid vector formulated ...
Breaking Medicine Technology: