Experiment shows how ascorbic acid works against aggregation of amyloid plaques – Journal da USP

By stopping protein from accumulating round nerve cells, vitamin C prevents the formation of fibrils which might be regarded as the principle trigger of Alzheimer’s illness. Animal and human trials are nonetheless wanted to evaluate whether or not ascorbic acid supplementation can stop the development of cognitive loss in sick individuals.

By Julio Bernardes

Photo: Courtesy of researchers

O Ascorbic acid is being studied for its potential means to forestall the construct-up of proteins round neurons (nerve system cells), stopping the formation of fibers regarded as an indicator of Alzheimer’s illness. experiment within the glass And computational evaluation at USP’s Instituto de Física de São Carlos (IFSC) tried to exhibit and clarify the mechanism bodily and chemically.

Isabella Sampaio – Photo: Reproduction/LinkedIn

“Alzheimer’s is a neurodegenerative illness that primarily impacts individuals over the age of 65. The predominant signs are reminiscence loss and cognitive impairment. USP Journal Researchers Isabella Sampaio and Professor Valtensir Zuccoloto, coordinator of the IFSC Nanomedicine and Nanotoxicology Group (GNano), are accountable for the analysis, the outcomes of that are introduced in an article revealed within the Scientific Journal. biochemistry. “Despite the growing incidence in Brazil, because of the getting older of the inhabitants, there may be nonetheless no remedy that stops or prevents the development of the illness”, he says.

Valtencir Zucolotto – Photo: Reproduction/IBGE

According to the researchers, “Some research have proven that the brains of Alzheimer’s sufferers have decrease ranges of ascorbic acid, also referred to as vitamin C, a molecule with antioxidant properties that performs an essential function in our immune system.” “The intention of our analysis was to experimentally consider the impact of ascorbic acid on the aggregation of β-amyloid peptides. within the glass and thru computational strategies, comparable to molecular dynamics, in collaboration with Professor Alessandro Nascimento on the IFSC.”

The work is preliminary, and doesn’t imply that taking the substance will stop the illness or include it in those that have already got it – extra may also be poisonous. To discover out how the information generated at this stage can be utilized, a collection of analysis must be carried out, together with exams on cells, then animals and eventually people.

Photo: Courtesy of researchers

Decrease in fibers

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For experiments within the glass, samples containing peptides have been incubated underneath situations that favored their aggregation. “Ascorbic acid was added to some of these samples. At particular incubation instances, parts of these samples have been taken and analyzed by completely different methods to evaluate the extent of aggregation of peptides. We emphasize that research on sufferers haven’t but been performed”, describe Isabella and Zuccoloto. “Experiments confirmed that in samples incubated with ascorbic acid, there was a big discount in fiber formation, indicating that these antioxidant molecules are capable of stop the aggregation of peptides.”

“Since ascorbic acid acts as an aggregation inhibitor, experiments have been performed to analyze how this happens,” the researchers reported. “Through molecular biophysics and laptop modeling methods, we discovered that ascorbic acid binds to β-amyloid on the identical binding websites between peptides, stopping mixture formation. In addition, it is ready to bind and destabilize already shaped fibers. Isabella and Zuccoloto level out that there’s a worldwide concern to develop efficient remedies for Alzheimer’s illness. Tests are nonetheless wanted in vivo (in animals, and later in people) and different steps to evaluate whether or not ascorbic acid supplementation would stop the development of cognitive loss in individuals identified with the illness, however the outcomes of this analysis open the door for additional research.


Vitor Tumas – Photo: Reproduction/LinkedIn

Vitor Tumas, professor within the Department of Neurosciences and Behavioral Sciences on the Faculty of Medicine of Ribeirao Preto (FMRP) at USP USP Journal Several research have advised that aggregation of peptides could also be a key pathological course of related to Alzheimer’s illness. “Research, on an experimental foundation, gives proof that ascorbic acid can stop aggregation and fibrillation”, he says.

“The level is that it labored within the glassMolecular evaluation is concerned, and it’s attainable that what’s demonstrated within the laboratory is probably not realized within the research. in vivo, with animal fashions, and no researcher has but been capable of show in people that intervention with the peptide prevents the onset and development of the illness”, he provides, highlighting one thing already highlighted by the authors of the article. None of this diminishes the scientific worth of the work completed, nevertheless it does function a warning against self-treatment.

“There remains to be no remedy for Alzheimer’s illness, and the article shows that the use of ascorbic acid to forestall the formation of protein clusters could also be a method to cease the illness, nonetheless, this impact has been proven physicochemically, not in ascorbic acid and peptides, cells and organs. , of which not all interactions resulting in Alzheimer’s are identified”, says Professor Marilia de Arruda Cardoso Smith on the Federal University of São Paulo (Unifesp), who researches the genetics of getting older and associated illnesses. “Now it’s essential to confirm whether or not this motion passed off in vivoWork ought to progress first in animal fashions, then in human cells and, if no unwanted effects are noticed, in people with the illness.”

More info: e-mail Professor Valtensir Zucolotto, zuco@ifsc.usp.br

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