Ascorbic acid may work against protein build-up that causes Alzheimer’s – 09/20/2022

Ascorbic acid is being studied for its potential to stop protein from accumulating round neurons (cells of the nervous system), stopping the formation of fibers that are thought-about a key characteristic of Alzheimer’s illness. In vitro experiments and computational analyzes carried out in IFSC (Institute of Physics of Sao Carlos) at USP tried to bodily and chemically show the mechanism and clarify it.

“Alzheimer’s illness is a neurodegenerative illness that primarily impacts individuals over the age of 65. The foremost signs are reminiscence loss and cognitive impairment,” researcher Isabella Sampaio and Professor Valtensir Zuccoloto, coordinator of GNano (Nanomedicine and Nanotoxicology Group) of the IFSC, chargeable for the analysis, the outcomes of that are introduced in an article revealed within the scientific journal Biochimi.

“Despite the growing incidence in Brazil, because of the ageing of the inhabitants, there’s nonetheless no remedy to stop or forestall the development of the illness,” they are saying.

According to the researchers, “Some research present that Alzheimer’s sufferers have a diminished quantity within the mind of ascorbic acid, popularly often known as vitamin C, which is a molecule with antioxidant properties that performs a key position in our immune system.”

“The purpose of our examine was then to judge the impact of ascorbic acid on the aggregation of beta-amyloid peptides by means of in vitro experiments and thru computational strategies, reminiscent of molecular dynamics, in collaboration with Professor Alessandro Nascimento from the IFSC.”

The work is preliminary and doesn’t imply that taking the substance will forestall the illness or restrict it in those that have already got it — extra may even be dangerous. A collection of research, together with checks on cells, then on animals and eventually on people, should be accomplished to know how the information produced at this stage can be utilized.

Decrease in fiber

For in vitro experiments, samples containing the peptides have been incubated beneath circumstances that favored their aggregation. “In a few of these samples, ascorbic acid was added. At particular incubation occasions, parts of those samples have been eliminated and analyzed by numerous strategies to evaluate the extent of peptide aggregation. We emphasize that affected person research haven’t but been carried out,” describe Isabella and Zuccoloto.

“The experiments confirmed that there was a big discount in fiber formation within the samples incubated with ascorbic acid, indicating that these antioxidant molecules are capable of inhibit peptide aggregation.”

“Since ascorbic acid acts as an aggregation inhibitor, experiments have been carried out to research how this happens,” the researchers report. “Using molecular biophysics and pc modeling strategies, we discovered that ascorbic acid binds to beta-amyloid on the identical website because the binding between peptides, stopping aggregates from forming. In addition, it is ready to bind and destabilize already shaped fibers. “

Isabella and Zuccoloto level out that there’s worldwide concern about growing efficient therapies for Alzheimer’s illness. In vivo checks (in animals and later in people) and additional steps are nonetheless wanted to evaluate whether or not ascorbic acid supplementation in individuals recognized with the illness would forestall the development of cognitive loss, however the outcomes of this examine open the door to continuity. of research.


Professor Vitor Tumas from the Department of Neurosciences and Behavioral Sciences in FMRP (Faculdade de Medicina de Ribeirão Preto) at USP, tells Jornal da USP that a number of research recommend that peptide aggregation can be the primary pathological course of related to Alzheimer’s illness. “Experimental analysis offers proof that ascorbic acid can inhibit aggregation and fibrillation,” he says.

“The concern is that this work was accomplished in vitro, involving molecular evaluation, and it is potential that what was demonstrated within the laboratory may not materialize in in vivo research in animal fashions, and no researchers have but been capable of show in people , that interfering with the peptide prevents the set up and development of the illness,” he provides, emphasizing one thing already highlighted by the paper’s authors. None of this diminishes the scientific worth of the work accomplished, however serves as a warning against self-medicine.

“Alzheimer’s illness nonetheless has no treatment and the paper reveals that utilizing ascorbic acid to stop the formation of protein clusters may be a strategy to cease the illness, however this impact has been demonstrated physicochemically, with ascorbic acid and peptides, not in cells and organs whose interactions attributable to Alzheimer’s illness are unknown,” says Professor Marilia de Arruda Cardoso Smith of Unifesp (Federal University of São Paulo), who research the genetics of ageing and associated illnesses.

“It is now mandatory to check whether or not this motion happens in vivo, work that should be accomplished progressively, first in animal fashions, then in human cells and, if no unwanted side effects are discovered, in individuals with the illness.”

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