Extra Virgin Olive Oil Staves Off Multiple Forms Of Dementia.
Source: Thailand Medical News Nov 26, 2019 5 years, 3 weeks, 5 days, 1 hour, 2 minutes ago
One of the key ways stave off the effects of aging is to boost brain function. And if there was one thing every person should consider doing right now to keep their brain young, it is to add
extra virgin olive oil (
EVOO) to their diet, according to research by scientists at the Lewis Katz School of Medicine at Temple University (LKSOM).
EVOO is a superfood, rich in cell-protecting antioxidants and known for its multiple health benefits, including helping put the brakes on diseases linked to aging, most notably cardiovascular disease.
Previous LKSOM research on mice also showed that EVOO preserves memory and protects the brain against
Alzheimer's disease.
A recent study in animal models published in the journal
Aging Cell, LKSOM scientists show that yet another group of aging-related diseases can be added to that list of tauopathies, which are characterized by the gradual buildup of an abnormal form of a protein called tau in the brain. This process leads to a decline in mental function, or dementia. The findings are the first to suggest that
EVOO can defend against a specific type of mental decline linked to tauopathy known as frontotemporal
dementia.
Typically,
Alzheimer's disease is itself one form of
dementia. It primarily affects the hippocampus ie the memory storage center in the brain. Frontotemporal dementia affects the areas of the brain near the forehead and ears. Symptoms typically emerge between ages 40 and 65 and include changes in personality and behavior, difficulties with language and writing, and eventual deterioration of memory and ability to learn from prior experience.
Dr Domenico Praticò, MD, Scott Richards North Star Foundation Chair for
Alzheimer's Research, Professor in the Departments of Pharmacology and Microbiology, and Director of the
Alzheimer's Center at Temple at LKSOM, and senior investigator of the study describes the new work as supplying another piece in the story about EVOO's ability to ward off cognitive decline and to protect the junctions where neurons come together to exchange information, which are known as synapses.
Dr Domenico Praticò told
Thailand Medical News, "
EVOO has been a part of the human diet for a very long time and has many benefits for health, for reasons that we do not yet fully understand," he said. "The realization that
EVOO can protect the brain against different forms of
dementia gives us an opportunity to learn more about the mechanisms through which it acts to support brain health."
In past research using a mouse model in which animals were destined to develop Alzheimer's disease, Dr. Praticò's team showed that
EVOO supplied in the diet protected young mice from memory and learning impairment as they aged. Most notably, when the researcher
s looked at brain tissue from mice fed
EVOO, they did not see features typical of cognitive decline, particularly amyloid plaques ie sticky proteins that gum up communication pathways between neurons in the brain. Rather, the animals' brains looked normal.
The researchers’ new study shows that the same is true in the case of mice engineered to develop tauopathy. In these mice, normal tau protein turns defective and accumulates in the brain, forming harmful tau deposits, also called tangles. Tau deposits, similar to amyloid plaques in
Alzheimer's disease, block neuron communication and thereby impair thinking and memory, resulting in frontotemporal
dementia.
The ‘tau mice’ were put on a diet supplemented with
EVOO at a young age, comparable to about age 30 or 40 in humans. Six months later, when mice were the equivalent of age 60 in humans, tauopathy-prone animals experienced a 60 percent reduction in damaging
tau deposits, compared to littermates that were not fed EVOO. Animals on the
EVOO diet also performed better on memory and learning tests than animals deprived of
EVOO.
The researchers upon examining brain tissue from
EVOO-fed mice, they found that improved brain function was likely facilitated by healthier synapse function, which in turn was associated with greater-than-normal levels of a protein known as complexin-1. Complexin-1 is known to play a critical role in maintaining healthy synapses.
The researchers now plan to explore what happens when
EVOO is fed to older animals that have begun to develop tau deposits and signs of cognitive decline, which more closely reflects the clinical scenario in humans.
Dr. Praticò added, "We are particularly interested in knowing whether
EVOO can reverse tau damage and ultimately treat tauopathy in older mice.”
The team also also planning initiating actual clinical trials sometime early 2020.
Reference : Elisabetta Lauretti et al, Extra virgin olive oil improves synaptic activity, short‐term plasticity, memory, and neuropathology in a tauopathy model, Aging Cell (2019). DOI: 10.1111/acel.13076
