An FDA approved drug to treat renal cell carcinoma appears to reduce levels of
a toxic brain protein linked to dementia in Alzheimer's and Parkinson's diseases when given to animals.
An experimental drug from Ionis Pharmaceuticals safely reduced
a toxic brain protein in Huntington's disease, according to early results in patients.
Not exact matches
Drugs that disrupt production of
toxic proteins in the
brain could work for various degenerative disorders, including Alzheimer's and Parkinson's
In humans, Huntington's is an inherited disease caused by a gene encoding a
toxic protein, called mutant huntingtin, which causes
brain cells to die.
Huntington's disease is caused by a gene encoding a
toxic protein (mutant huntingtin) that causes
brain cells to die.
That leads the
protein alpha - synuclein to build up and form
toxic clumps in
brain areas that control motor function.
Fruit flies with the mutant form of LRRK2 also had a disrupted microRNA pathway associated with the gene, and accumulated
toxic proteins that killed motor - coordinating neurons in the
brain.
At the same time, researchers have found that much smaller
protein clusters called oligomers — made of only a few copies of these
proteins — can be highly
toxic to motor neuron - like cells grown in the lab and thus are more likely to be the chief causes of
brain - cell death in these diseases.
«
Toxic Alzheimer's
protein spreads through
brain via extracellular space.»
A
toxic Alzheimer's
protein can spread through the
brain — jumping from one neuron to another — via the extracellular space that surrounds the
brain's neurons, suggests new research from Columbia University Medical Center.
Both are antibodies that bind to amyloid
proteins and help remove the
toxic proteins from the
brain before they have a chance to turn into plaques.
The newly unmasked genes play a role in three distinctively different bodily functions, including systems that control inflammation and cholesterol and the regulation of how
brain cells clean up
toxic proteins.
The disease is caused by the accumulation of abnormally shaped α - synuclein
proteins in neurons, leading to particularly
toxic effects in dopamine - releasing cells located in
brain regions that control movement.
But for reasons that are yet unknown, when Alzheimer's develops, this
protein divides improperly and creates a form called beta amyloid, which is
toxic to neurons in the
brain.
The researchers developed a model of Alzheimer's disease and were surprised to find that increased levels of a gene involved in the production of
toxic proteins in the
brain not only led to Alzheimer's - like symptoms, but also to the development of diabetic complications.
Amyloid plaques are the
toxic clumps of
protein that cause damage to cells in the
brains of people with Alzheimer's disease.
As study director Brack - Werner explained: «Several viral
proteins are
toxic to neurons and may cause immune damage in the
brain.
Excess DDRs activation may switch off autophagy, resulting in build - up of
toxic proteins inside
brain cells and possibly breakdown of the blood -
brain barrier, common in neurodegenerative diseases, he says.
«Activation of these cell receptors appear to prevent
brain cells from cleaning out the trash — the
toxic buildup of
proteins, such as alpha - synuclein, tau and amyloid, common in neurodegenerative diseases,» says the study's senior author, neurologist Charbel Moussa, MBBS, PhD, director of Georgetown's Laboratory for Dementia and Parkinsonism, and scientific and clinical research director of the GUMC Translational Neurotherapeutics Program.
Secreted by certain
brain cells, APOE is known to regulate cholesterol metabolism within the
brain and can bind to A-beta peptides, suggesting that the different forms of the
protein may affect whether and how
toxic A-beta plaques form.
Researchers at the University of Pittsburgh School of Medicine have uncovered a major reason why the Parkinson's - related
protein alpha - synuclein, a major constituent of the Lewy bodies that are the pathological hallmark of Parkinson's disease (PD), is
toxic to neurons in the
brain.
The mutant Huntingtin gene is thought to cause
toxic levels of
protein to aggregate in the
brain.
The researchers anticipate that the pigs could be a practical way to test treatments for HD, which is caused by a gene encoding a
toxic protein that causes
brain cells to die.
The recent ability to peer into the
brain of living individuals with a rare type of language dementia, primary progressive aphasia (PPA), provides important new insights into the beginning stages of this disease — which results in language loss — when it is caused by a buildup of a
toxic protein found in Alzheimer's disease.
Both types of dementia (memory and language) can be caused by an accumulation of beta - amyloid, an abnormal
toxic protein in the
brain.
In the present work, the teams led by Michael Ewers (ISD) and EMBO Member Christian Haass (DZNE) focussed on the TREM2
protein, which functions in specialized
brain immune cells called microglia that clear
toxic material resulting from nerve cell injury.
Using a special imaging technique, Northwestern Medicine scientists have discovered the
toxic build - up of amyloid
protein is greater on the left side of the
brain — the site of language processing — than on the right side in many individuals living with PPA.
The drug also appeared to reduce the amount of the
protein amyloid beta (which forms
toxic plaques in the
brains of Alzheimer's patients) by decreasing the levels of metals such as zinc and copper.
This is a drawing representing structure of properly functioning
protein (left) which is optically invisible to high power laser light, and
toxic amyloid (right) responsible for
brain diseases that might potentially be cured using lasers in photo therapies.
Many cases of ALS are sparked by a
toxic build - up of certain
proteins, which cause neurons in the
brain and spinal cord to die.
In February a group of researchers from Case Western Reserve University reported online in Science that a cancer drug with relatively benign side effects was able to rapidly clear from the
brains of mice
toxic amyloid - beta
protein fragments that accompany Alzheimer's.
Indeed, infectious prions are solely composed of preformed aggregates of misfolded prion
protein, which transmit disease by seeding the aggregation of the endogenous prion
protein, resulting in the accumulation of large quantities of these
toxic aggregates in the
brain (Prusiner, 1998; Soto et al., 2006).
In addition, other teams at the O'Donnell
Brain Institute are designing tests for the early detection of patients who will develop dementia, and seeking methods to slow or stop the spread of toxic proteins associated with the disease such as beta - amyloid and tau, which are blamed for destroying certain groups of neurons in the b
Brain Institute are designing tests for the early detection of patients who will develop dementia, and seeking methods to slow or stop the spread of
toxic proteins associated with the disease such as beta - amyloid and tau, which are blamed for destroying certain groups of neurons in the
brainbrain.
Huntington's is an inherited disease caused by a gene encoding a
toxic protein (mutant huntingtin) that causes
brain cells to die.
Huntington's disease is caused by a gene encoding a
toxic protein (mutant huntingtin or mHTT) that causes
brain cells to die.
Research by BrightFocus grantee Matthew Campbell, PhD, of Trinity College Dublin, suggests a unique way to help clear the
brain of
toxic amyloid beta
protein, which contributes to the development of Alzheimer's.
Enhancing the
brain's own clean - up crews could be a strategy for handling the
toxic proteins driving several neurodegenerative diseases, new research suggests.
The new study from a team at the Cleveland Clinic Lerner Research Institute focused on an enzyme called BACE1 (aka beta - secretase), which is known to contribute to the formation of the
toxic amyloid
proteins that congregate as plaques on the
brain, and are hypothesized to be the source of most Alzheimer's symptoms.
They also identified targets for potential therapies: bolstering levels of either a particular chaperone or a growth factor in
brain cells can protect against the
toxic effects of misfolded
proteins.
The researchers used CRISPR / Cas9 gene editing, delivered by a viral vector, to snip part of a gene producing
toxic protein aggregates in the
brains of 9 - month old mice.
Aβ
proteins, which build up to
toxic levels in the
brains of people with Alzheimer's disease, impair the axonal transport of these cargoes.
«Huntington's — an inherited and fatal disorder that leads to problems with muscle coordination, cognition and personality — is characterized by the
toxic buildup of a mutant form of the huntingtin
protein in the
brain,» explained Dr. Finkbeiner, who directs the Taube - Koret Center for Neurodegenerative Disease Research at Gladstone.
Sleep seems to be therapeutic and seems to clear out some of these amyloid plaques or these
toxic proteins that accumulate in the
brain.
And these essentially are
toxic proteins that clog up the signaling of the areas in the
brain so that cells essentially start to dysfunction and eventually to die off.
Zoghbi's lab also found that this altered ATXN1 gene sequence encodes a bulky, improperly folded
protein that is
toxic to
brain cells.
Here's a tantalizing prospect, hinted at by a long - running thread of
brain research: compounds that boost the function of certain acetylcholine circuits in the
brain might also modify production of
toxic beta - amyloid
protein.
St. Jude Children's Research Hospital scientists have identified an enzyme that can halt or possibly even reverse the build - up of
toxic protein fragments known as plaques in the
brains of mice with Alzheimer's disease.
LONDON (July 16, 2017)-- Researchers have found cell receptors abnormally overexpressed in post-mortem
brains of those with Parkinson's and Alzheimer's diseases, and that they can be inhibited in animal models to clear
toxic protein buildup, reduce
brain inflammation, and improve cognitive performance.
One aspect of Dr. Gan's research focuses on why
toxic proteins accumulate in the
brains of Alzheimer patients.
Additional exploratory objectives include assessing the impact that each compound has on the
toxic mutant
protein known to cause loss of
brain cells in HD, as well as evaluating potential clinical effects and impact on
brain atrophy as measured by magnetic resonance imaging (MRI).