Researchers have determined how omega - 3 fatty acids and vitamin D3 can boost the immune system's capability to remove
the brain of amyloid plaques, a hallmark of Alzheimer's disease.
Not exact matches
The «
amyloid hypothesis» figures that a buildup
of brain plaque is what leads to the cognitive decline that Alzheimer's patients experience.
For one, it would give them three specific biological markers to hone in on: The buildup
of beta
amyloid and tau proteins, which cause
brain plaques associated with Alzheimer's, and
brain nerve cell death.
After the night with disrupted sleep, the researchers found people had higher levels
of beta -
amyloid proteins, the proteins that clump together and form the
plaque found in Alzheimer's - afflicted
brains, in the volunteers» spinal fluid.
It offers cardio protection, it helps lower bad cholesterol, it may help prevent the progression
of multiple sclerosis, it has the ability to regenerate
brain cells after a stroke, it has the ability to cross the blood -
brain barrier to potentially ward off Alzheimer's disease, apparently it's good at wiping
amyloid plaque from the
brain (which studies haves linked to Alzheimer's), it may help to prevent certain types
of cancer, and studies have shown that it inhibits cancer cell growth and metastases (meaning it keeps cancer from spreading).
IN BRIEF Scientists have new evidence that suggests that THC inhibits the formation
of amyloid plaques by blocking the enzyme in the
brain that produces them.
The actual process
of vascular aging may predispose a person's
brain to the increased amount
of amyloid plaque buildup.
«
Amyloid is one
of many substances that builds up in
plaques as a result
of dying cells and atrophy in the
brain,» he says.
«
Brain cells from mice fed diets enriched with extra-virgin olive oil had higher levels
of autophagy and reduced levels
of amyloid plaques and phosphorylated tau,» Dr. Praticò said.
In addition, compared to mice on a regular diet,
brain cells from animals in the olive oil group showed a dramatic increase in nerve cell autophagy activation, which was ultimately responsible for the reduction in levels
of amyloid plaques and phosphorylated tau.
In a study published online June 21 in the Annals
of Clinical and Translational Neurology, the researchers show that the consumption
of extra-virgin olive oil protects memory and learning ability and reduces the formation
of amyloid - beta
plaques and neurofibrillary tangles in the
brain — classic markers
of Alzheimer's disease.
The
brains of mice engineered to develop Alzheimer's disease were riddled with these
plaques, clumps
of amyloid - beta protein fragments, by the time the animals were 10 months old.
Specifically, rodents genetically modified to express human
amyloid precursor protein (hAPP), which can lead to the debilitating
plaques that form in the
brains of Alzheimer's patients, seem to struggle to find the hidden platform relative to their healthy peers.
IRON overload may accelerate Alzheimer's disease, according to research that also reveals the role
of beta -
amyloid precursor protein (APP), which forms
plaques in affected
brains.
The HSP70 - boosted mice were much better than the others at finding their way around mazes, and post-mortems showed their
brains to be free
of the characteristic beta -
amyloid plaques that clog the
brains of people with Alzheimer's.
Previously, researchers have focused on the role
of protein deposits called
amyloid plaques that lodge in the
brain of Alzheimer's affected people.
This aberrant
brain circuitry — the
amyloid plaques and tau tangles — became the twin hallmarks
of the disease that bears his name.
«Two individuals may harbor similar amounts
of amyloid plaques and tau tangles in their
brains, but one may be completely healthy while the other may have severe memory loss and dementia,» he says.
Recent research also has illuminated how the deadly cascade that leads to
brain atrophy is set in motion: The buildup
of amyloid plaques, working in tandem with certain gene mutations, sparks the formation
of the renegade tau proteins.
The UCLA researchers, led by David Eisenberg, director
of the UCLA - Department
of Energy Institute
of Genomics and Proteomics and a Howard Hughes Medical Institute investigator, report the first application
of this technique in the search for molecular compounds that bind to and inhibit the activity
of the
amyloid - beta protein responsible for forming dangerous
plaques in the
brain of patients with Alzheimer's and other degenerative diseases.
In Alzheimer's disease,
plaques of amyloid beta protein accumulate in the
brain, damaging connections between neurons.
But Holtzman and other researchers previously demonstrated that
plaques of amyloid - beta protein build up faster in the
brains of APOE4 carriers (SN: 7/30/11, p. 9).
«Although previous research has shown that some head injury patients have these
amyloid plaques shortly after the incident, these findings suggest these
plaques are still present in the
brains of patients over 10 years later.
The
brains of people with Alzheimer's show several signs
of the disease:
plaques made
of a protein called
amyloid - β, tangles
of a protein called tau and the loss
of neurons.
The
brains of people with Alzheimer's are dotted with
plaques of amyloid beta protein and tangles
of tau protein, which together cause
brain tissue to atrophy and die.
Brains of patients with Alzheimer's disease clog up too, but with
plaques made from a different protein called
amyloid beta peptide.
The results showed that
amyloid plaque levels in the posterior cingulate cortex were related to the amount
of white matter damage, suggesting that injury to the
brain's wiring may be linked to the formation
of amyloid plaques.
A protein fragment called
amyloid - beta (Aβ) is known to aggregate and create
plaque in the
brains of Alzheimer's patients.
To investigate that, scientists will need to examine the
brain tissue
of many people who have died
of Alzheimer's, looking for different pathogens and whether the microbes are surrounded by
amyloid plaques, he says.
High levels
of «good» cholesterol and low levels
of «bad» cholesterol are correlated with lower levels
of the
amyloid plaque deposition in the
brain that is a hallmark
of Alzheimer's disease, in a pattern that mirrors the relationship between good and bad cholesterol in cardiovascular disease, UC Davis researchers have found.
The result, says Flajolet, is a
brain that is hard and transparent, almost «like glass,» which allowed the researchers to see the
amyloid plaques in full detail and in 3D, in a full mouse
brain hemisphere, as well as in small blocks
of human
brain tissue.
Like cardiovascular disease, Alzheimer's involves the buildup
of plaque, in this case tangled beta -
amyloid proteins in the
brain.
Amyloid plaques are the toxic clumps
of protein that cause damage to cells in the
brains of people with Alzheimer's disease.
«Our study shows that both higher levels
of HDL — good — and lower levels
of LDL — bad — cholesterol in the bloodstream are associated with lower levels
of amyloid plaque deposits in the
brain,» said Bruce Reed, lead study author and associate director
of the UC Davis Alzheimer's Disease Center.
«Using nanoliposomes offers an alternative way to inhibit the toxic build - up
of amyloid plaques without activating an immune response in the
brain.
Combine your articles on psilocybin and other psychedelic drugs having beneficial effects on the
brain (such as 25 November 2017, p 28) with the promising reports
of 40 hertz bass tones and flickering lights reducing the tangles and
plaques of tau and
amyloid proteins that are correlated with Alzheimer's disease (6 January, p 6).
A new study appearing in the Journal
of Neuroinflammation suggests that the
brain's immune system could potentially be harnessed to help clear the
amyloid plaques that are a hallmark
of Alzheimer's disease.
One look at an image
of an Alzheimer's afflicted
brain is unflinching testimony to the disease's cruelty: It destroys
of up to 30 percent
of a
brain's mass, carving out ravines and depositing piles
of molecular junk, most visibly
amyloid plaque.
Exhaustive
brain research has pieced together how extracellular beta -
amyloid plaques and intracellular neurofibrillary tangles
of tau proteins are strongly linked to the neurodegenerative pathology
of Alzheimer's disease.
Studies in mice specially bred to have features
of the disease found that DHA reduces beta -
amyloid plaques, abnormal protein deposits in the
brain that are a hallmark
of Alzheimer's, although a clinical trial
of DHA showed no impact on people with mild to moderate Alzheimer's disease.
Two participants had remarkably clean
brains with few signs
of amyloid - beta
plaques and tangles
of tau protein.
For this study, 10 subjects with Alzheimer's underwent PET following the injection
of three radiotracers: fluorine - 18 fluorodeoxyglucose (F - 18 FDG), which images regional metabolic activity; carbon - 11 Pittsburgh compound B (C - 11 PiB), which has an affinity for
amyloid plaques; and F - 18 AV - 1451, an emerging imaging agent that binds to tau in the
brain.
A definitive diagnosis
of Alzheimer's includes dementia and two distortions in the
brain:
amyloid plaques, sticky accumulations
of misfolded pieces
of protein known as
amyloid beta peptides; and neurofibrillary tangles, formed when proteins called tau clump into long filaments that twist around each other like ribbons.
b - secretase acts like a pair
of molecular scissors, snipping a piece off a large protein to produce b -
amyloid, a smaller protein that builds up in
plaques in the
brains of Alzheimer's patients and is thought to kill neurons.
The main hypothesis on the cause
of Alzheimer's involves
amyloid deposition, the buildup
of plaques in the
brain that impair neurological function; most biomedical efforts to tackle the disease have focused on this issue.
Given these insights,
amyloids» role in Alzheimer's may be much more complex than researchers thought years ago, when they first discovered the clumps, or
plaque, in the
brains of Alzheimer's patients during autopsy.
Alzheimer's disease has been linked to the formation
of sticky beta -
amyloid plaques and tau tangles in the
brain.
In a study published in the journal Cell Reports, Drs. Per Nilsson, Takaomi Saido and their team show for the first time using transgenic mice that a lack
of autophagy in neurons prevents the secretion
of amyloid beta and the formation
of amyloid beta
plaques in the
brain.
A new study
of elderly chimp
brains finds the characteristic
amyloid plaques and neurofibrillary tangles
of Alzheimer's disease.
Previously, researchers have shown that treating cells with neuregulin - 1, for example, dampens levels
of amyloid precursor protein, a molecule that generates
amyloid beta, which aggregate and form
plaques in the
brains of Alzheimer's patients.