Stroke-like brain damage is reduced in mice injected with omega-3s

August 22, 2016
Credit: martha sexton/public domain

Researchers from Columbia University Medical Center (CUMC) found that omega-3 fatty acids reduced brain damage in a neonatal mouse model of stroke.

Findings from the study were published recently in PLOS ONE.

The researchers treated 10-day-old mice that had incurred hypoxic-ischemic injury (caused by a decrease in and oxygen to the brain, as occurs during a stroke) with a fat emulsion containing either DHA or EPA— that are found in certain foods and in supplements. The researchers evaluated the mice's neurological function 24 hours and 8 to 9 weeks after the brain injury.

EPA and DHA are bioactive omega-3 fatty acids that are found in oils extracted from cold-water fish. The CUMC researchers and other scientists have shown that these fish-oil protect organs and cells in numerous ways after oxygen deprivation, reducing inflammation and cell death.

At 24 hours, mice treated with DHA, but not EPA, had a significant reduction in brain injury. In the following weeks, the DHA group also had significantly better results in multiple brain functions compared to the EPA-treated mice and untreated (control) mice.

The researchers also discovered that these mice had increased concentrations of DHA in their brain mitochondria, energy-producing structures in cells that can be injured by free radicals when blood flow is restored to the brain after a stroke. This process, known as reperfusion injury, is a common cause of following the oxygen and nutrient deprivation that occurs after a stroke.

"Our findings suggest that injecting the omega-3 fatty acid DHA after a stroke-like event has the ability to protect brain mitochondria against the damaging effects of free radicals," said senior co-author, Vadim S. Ten, MD, PhD, associate professor of pediatrics at CUMC.

Interruption of blood flow and oxygen supply to the brain during or shortly after birth is a major cause of brain damage in newborns, causing life-long neurological impairments in more than 25 percent of those affected. Many of the pathways involved in this type of brain damage are similar to those in an adult stroke.

"Clinical trials are needed to determine if administering lipid emulsions containing DHA shortly after a stroke-like offers the same neuroprotective effects in babies and adults, as seen in . If successful, such trials could lead to the development of a novel therapy for stroke in newborns, children, and adults, addressing a major medical need," said senior co-author Richard J. Deckelbaum, MD, CM, the Robert R. Williams Professor of Nutrition (in Pediatrics) and Professor of Epidemiology and director of the Institute of Nutrition at CUMC.

The study is titled, "DHA but Not EPA Emulsions Preserve Neurological and Mitochondrial Function after Brain Hypoxia-Ischemia in Neonatal Mice."

Explore further: Omega-3 lipid emulsions markedly protect brain after stroke in mouse study

Related Stories

Omega-3 lipid emulsions markedly protect brain after stroke in mouse study

February 20, 2013
Triglyceride lipid emulsions rich in an omega-3 fatty acid injected within a few hours of an ischemic stroke can decrease the amount of damaged brain tissue by 50 percent or more in mice, reports a new study by researchers ...

Omega-3s reduce stroke severity

August 25, 2011
A diet rich in omega-3s reduces the severity of brain damage after a stroke, according to a study conducted by Université Laval researchers. The team, co-directed by professors Jasna Kriz and Frédéric Calon, ...

Novel lipid mediators may play role in omega-3 PUFA effects

June 25, 2016
(HealthDay)—Novel lipid mediators may be involved in the beneficial effects associated with omega-3 polyunsaturated fatty acids (PUFAs) in obesity, according to a study published online June 16 in Diabetes.

Low levels of omega-3 fatty acids may cause memory problems

February 27, 2012
A diet lacking in omega-3 fatty acids, nutrients commonly found in fish, may cause your brain to age faster and lose some of its memory and thinking abilities, according to a study published in the February 28, 2012, print ...

Omega-3 dietary supplements pass the blood-brain barrier

December 4, 2013
(Medical Xpress)—New research from Karolinska Institutet shows that omega-3 fatty acids in dietary supplements can cross the blood brain barrier in people with Alzheimer's disease, affecting known markers for both the disease ...

Study links omega-3s to reduced mortality

June 22, 2016
A recent meta-analysis in Scientific Reports supports a link between EPA and DHA omega-3 intake and a reduced risk of death by any cause. The meta-analysis included 11 studies involving 371,965 participants and 31,185 death ...

Recommended for you

Touching helps build the sexual brain

September 21, 2017
Hormones or sexual experience? Which of these is crucial for the onset of puberty? It seems that when rats are touched on their genitals, their brain changes and puberty accelerates. In a new study publishing September 21 ...

Gene immunotherapy protects against multiple sclerosis in mice

September 21, 2017
A potent and long-lasting gene immunotherapy approach prevents and reverses symptoms of multiple sclerosis in mice, according to a study published September 21st in the journal Molecular Therapy. Multiple sclerosis is an ...

Neuron types in brain are defined by gene activity shaping their communication patterns

September 21, 2017
In a major step forward in research, scientists at Cold Spring Harbor Laboratory (CSHL) today publish in Cell a discovery about the molecular-genetic basis of neuronal cell types. Neurons are the basic building blocks that ...

Your neurons register familiar faces, whether you notice them or not

September 21, 2017
When people see an image of a person they recognize—the famous tennis player Roger Federer or actress Halle Berry, for instance—particular cells light up in the brain. Now, researchers reporting in Current Biology on ...

Highly precise wiring in the cerebral cortex

September 21, 2017
Our brains house extremely complex neuronal circuits whose detailed structures are still largely unknown. This is especially true for the cerebral cortex of mammals, where, among other things, vision, thoughts or spatial ...

Faulty cell signaling derails cerebral cortex development, could it lead to autism?

September 20, 2017
As the embryonic brain develops, an incredibly complex cascade of cellular events occur, starting with progenitors - the originating cells that generate neurons and spur proper cortex development. If this cascade malfunctions ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.