A possible explanation has been found in a study for why apoE4, the most significant genetic risk factor associated with Alzheimer’s disease, fails to protect the brain from inflammation.
Alzheimer’s disease is characterised by the accumulation of plaques of the amyloid-β protein, chronic inflammation and impaired neuronal function in the brain. The most significant genetic risk factor for the disease is apoE4, a variant of apolipoprotein E, which is known for, among other things, advancing the onset of the disease. While more than half of all individuals with Alzheimer’s disease carry this variant, the exact effect of apoE4 on the development of the disease has remained unknown.
A study identified a more accurate link between the apoE4 gene and the part of the human body’s immune system that underlies, among other things, Alzheimer’s disease. This is known as the complement system, and it contributes to the destruction of foreign cells and easily triggers inflammatory responses in the body.
“We found that apoE4 poorly binds factor H, a regulatory factor of immunity. The factor H molecule is crucial in preventing complement-mediated inflammation”, says the principal investigator of the study.
“Usually, apoE binds factor H to the amyloid-β aggregates in the brain, thus reducing local inflammation. But apoE4 does not” the author points out. This results in the accumulation of harmful amyloid-β aggregates and inflammation in the brain.
According to the author, binding factor H to apoE4 could present a potential solution to preventing changes in the brain that lead to the onset of Alzheimer’s disease. Further research will soon be conducted to look for such a bridging molecule.
The amyloid-β aggregates associated with Alzheimer’s disease begin to form in the brain decades before the diagnosis of the memory disorder. Since the mechanism underlying these changes has not been sufficiently well known, drug development has focused on stopping or slowing down changes that have already taken place.
“The drugs currently in use do not prevent the onset of the disease itself,” the author confirms.
Alzheimer’s disease is a slowly progressing memory disorder with more than 10 million new cases every year. As the population ages, the number of patients with the disease will rise considerably. In the future, Alzheimer’s disease will increase human suffering, as well as the burden on public health and the economy.
“Determining the molecular mechanisms that affect the onset of Alzheimer’s disease is important for developing curative drugs and therapies in the future.”
The study, published in the EMBO Reports journal, was carried out both by using experimental cell culture models and investigating brain biopsy samples from patients with idiopathic normal pressure hydrocephalus (iNPH) syndrome.
https://www.embopress.org/doi/full/10.15252/embr.202256467
http://sciencemission.com/site/index.php?page=news&type=view&id=publications%2Freduced-binding-of&filter=22
How apoE4 and complement factor contribute to neuroinflammation
- 912 views
- Added
Edited
Latest News
Mechanism of action of the…
By newseditor
Posted 23 Apr
Role of fat in rare neurolo…
By newseditor
Posted 23 Apr
How protein synthesis in de…
By newseditor
Posted 22 Apr
Atlas of mRNA variants in d…
By newseditor
Posted 22 Apr
Mapping microbiome in metas…
By newseditor
Posted 22 Apr
Other Top Stories
How the brain acquires essential omega-3 fatty acids
Read more
How CAG repeat interferes with DNA repair and lead to disease
Read more
How aggression-promoting brain peptide works in fruit flies
Read more
AI tool to predict Parkinson's disease onset
Read more
Countering depression by restoring key brain rhythm
Read more
Protocols
A programmable targeted pro…
By newseditor
Posted 23 Apr
MemPrep, a new technology f…
By newseditor
Posted 08 Apr
A tangible method to assess…
By newseditor
Posted 08 Apr
Stem cell-derived vessels-o…
By newseditor
Posted 06 Apr
Single-cell biclustering fo…
By newseditor
Posted 01 Apr
Publications
Structure of antiviral drug…
By newseditor
Posted 23 Apr
Type-I-interferon-responsiv…
By newseditor
Posted 23 Apr
Selenium, diabetes, and the…
By newseditor
Posted 23 Apr
Long-term neuropsychologica…
By newseditor
Posted 23 Apr
Neuronal activity rapidly r…
By newseditor
Posted 22 Apr
Presentations
Hydrogels in Drug Delivery
By newseditor
Posted 12 Apr
Lipids
By newseditor
Posted 31 Dec
Cell biology of carbohydrat…
By newseditor
Posted 29 Nov
RNA interference (RNAi)
By newseditor
Posted 23 Oct
RNA structure and functions
By newseditor
Posted 19 Oct
Posters
A chemical biology/modular…
By newseditor
Posted 22 Aug
Single-molecule covalent ma…
By newseditor
Posted 04 Jul
ASCO-2020-HEALTH SERVICES R…
By newseditor
Posted 23 Mar
ASCO-2020-HEAD AND NECK CANCER
By newseditor
Posted 23 Mar
ASCO-2020-GENITOURINARY CAN…
By newseditor
Posted 23 Mar