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 results were remarkably positive, with the reduction in BACE1 activity not only stalling the
development of amyloid plaques in the mice, but actually removing the deposits that had already formed.
The theory is that this and other approaches to fasting help improve neural connections in a part of the brain called the hippocampus, while protecting against
accumulations of amyloid plaque implicated in the genesis of Alzheimer's disease.
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.
«Using nanoliposomes offers an alternative way to inhibit the toxic build -
up of amyloid plaques without activating an immune response in the brain.
However, it is widely accepted that before the overt
deposition of amyloid plaques and neurofibrillary tangles, the accumulation of amyloid - β (Aβ) peptides is one of the first steps in the series of pathogenic changes that lead to neurodegeneration and dementia [5, 6].
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 brains of individuals having Alzheimer's have
clumps of amyloid plaques which are made up of aggregates of misfolded proteins.
What the study did not find is a correlated reduction of the
number of amyloid plaques in the brain, a characteristic feature of Alzheimer's disease.
In a study of 166 people, those who took the highest doses of BIIB037 had the largest
reduction of amyloid plaque and even reversed their cognitive decline.
The peripheral sink Aβ hypothesis indicates that the peripheral clearance of Aβ and its regulation by dietary phytosterols is of substantial interest since it may delay hypercholesterolemia and the early
onset of amyloid plaque development.
«This discovery is very important, as the
elimination of amyloid plaques by the brain cells themselves is one of the key strategies under development as a cure for Alzheimer's disease.
«I think that may lead to chronically elevated amyloid levels, which animal studies have shown lead to increased
risk of amyloid plaques and Alzheimer's.»
«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.
In other words, the researchers determined that modulating the mouse brain's stress circuitry (without actually changing the normal response) mitigated generation and accumulation
of amyloid plaques widely attributed with causing neuronal damage and death.
One 2013 study showed that the extracellular space in a mouse's brain expands by 60 percent during sleep, and
clearance of amyloid plaque (one protein implicated in Alzheimer's) spikes.
In persons with the disease, the formation
of amyloid plaque aggregates, a process known to cause the onset of Alzheimer's disease, prevents the Crtc1 protein from functioning correctly.
One of the problems with diagnosing Alzheimer's at an early stage is that it currently requires a hospital and a lengthy, expensive procedure to look for
signs of amyloid plaques in the brain.
«At every scientific meeting I'm at, everyone's talking about this question: Why are some people with
lots of amyloid plaques — the people who, according to our models, should get Alzheimer's — protected from this runaway immune response?
«We think about the slow
production of amyloid plaques over decades and in this mouse model, a bacterial infection could cause full - blown plaques overnight.»
He earned his M.D. from Harvard Medical School and Ph.D. from the Massachusetts Institute of Technology where his thesis focused on elucidating the structure and
properties of amyloid plaques associated with Alzheimer's disease and type II diabetes mellitus.
Some out of the box thinking about other ways to protect the brain from the
onslaught of these amyloid plaques, to help boost its signaling capacity among the different cells.
An expert in neurodegenerative diseases, Fraser focuses on the biochemistry and
biophysics of amyloid plaques and their connections to Alzheimer's disease.
Disrupted sleep seems to be linked to the accumulation
of amyloid plaques inside the brains of people not having problems with memory.
At the end of the study, it was found that 25 % of the people had
evidence of amyloid plaques, which may appear years ahead of Alzheimer's disease symptoms begin.
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.
The
presence of amyloid plaque in the brain precedes Alzheimer's and can be detected by costly positron emission tomography (PET) scans, which are not usually covered by insurance.
Most experimental treatments for Alzheimer's have aimed at curbing beta - amyloid, an apparently toxic protein fragment that is the dominant
component of amyloid plaques.
Alzheimer's is sometimes called Diabetes type 3 because insulin resistance may also cause the build
up of amyloid plaques.
July 21, 2016 Antibiotic treatment weakens progression of Alzheimer's disease through changes in the gut microbiome Long - term treatment with broad spectrum antibiotics decreased
levels of amyloid plaques, a hallmark of Alzheimer's disease, and activated inflammatory microglial cells in the brains of mice in a new study by neuroscientists from the University of Chicago.
Their research revealed that the brains of the coffee drinkers actually showed less
development of amyloid plaques, a hallmark of Alzheimer's disease.
«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.
The researchers hypothesize that the radiation prevented the
buildup of amyloid plaques, the sticky protein aggregates that are found in Alzheimer's brains.They suggest that their work may eventually lead to a treatment that can halt the disease process.
Scientists have long considered
clumps of amyloid plaques — sticky, barnacle - like protein bundles — to be the first sign of Alzheimer's.