Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researchers discover how DHA omega-3 fatty acid reaches the brain

15.05.2014

It is widely believed that DHA (docosahexaenoic acid) is good for your brain, but how it is absorbed by the brain has been unknown. That is - until now.

Researchers from Duke-NUS Graduate Medical School Singapore (Duke-NUS) have conducted a new study identifying that the transporter protein Mfsd2a carries DHA to the brain. Their findings have widespread implications for how DHA functions in human nutrition.


Omega-3 fatty acid DHA transporter protein Mfsd2a is shown here as red fluorescence along mouse brain capillaries.

Credit: Long N. Nguyen

People know that DHA is an essential dietary nutrient that they can get from seafood and marine oils. Baby formula companies are especially attuned to the benefits of DHA, with nary a baby formula marketed without it.

DHA is an omega-3 fatty acid most abundantly found in the brain that is thought to be crucial to its function. However, the brain does not produce DHA. Instead, DHA uptake in the brain happens in two ways. The developing brain receives DHA during fetal development, from a mother to her baby. The adult brain gets it through food or DHA produced by the liver.

Though DHA is postulated to benefit the brain, the mechanics of how the brain absorbs the fatty acid has remained elusive. Senior author of the research, Associate Professor David L. Silver of Duke-NUS explained the importance of unlocking this mystery.

"If we could show the link by determining how DHA gets into the brain, then we could use this information to more effectively target its absorption and formulate an improved nutritional agent."

In the study, led by post-doctoral fellow Long N. Nguyen of Duke-NUS, researchers found that mice without the Mfsd2a transporter had brains a third smaller than those with the transporter, and exhibited memory and learning deficits and high levels of anxiety. The team recognized that the learning, memory and behavioral function of these mice were reminiscent of omega-3 fatty acid deficiency in mice starved of DHA in their diet.

Then, using biochemical approaches, the team discovered that mice without Mfsd2a were deficient in DHA and made the surprising discovery that Mfds2a transports DHA in the chemical form of lysophosphatidlycholine (LPC). LPCs are phospholipids mainly produced by the liver that circulate in human blood at high levels. This is an especially significant finding as LPCs have been considered toxic to cells and their role in the body remains poorly understood. Based on this surprising new information, Dr Silver's team showed that Mfsd2a is the major pathway for the uptake of DHA carried in the chemical form of LPCs by the growing fetal brain and by adult brain.

The findings, published online in Nature the week of May 12, 2014 marks the first time a genetic model for brain DHA deficiency and its functions in the brain has been made available.

"Our findings can help guide the development of technologies to more effectively incorporate DHA into food and exploit this pathway to maximize the potential for improved nutritionals to improve brain growth and function. This is especially important for pre-term babies who would not have received sufficient DHA during fetal development," said Dr Silver, who is from the Cardiovascular and Metabolic Disorders Program at Duke-NUS.

###

In addition to Dr. Silver and Dr. Nguyen, study authors include Dr. Dongliang Ma, Dr. Peiyan Wong, Assistant Professor Xiaodong Zhang and Assistant Professor Eyleen Goh from Duke-NUS and Dr. Guanghou Shui, Dr. Amaury Cazenave Gassiot and Associate Professor Markus Wenk from the Yong Loo Lin School of Medicine, National University of Singapore. Part of the research was carried out by Dr Wenk and a group of researchers at the Singapore Lipidomics Incubator (SLING).

This research is supported by the Singapore National Research Foundation under its Cooperative Basic Research Grant (CBRG) and administered by the Singapore Ministry of Health's National Medical Research Council.

Dharshini Subbiah | Eurek Alert!
Further information:
http://www.duke-nus.edu.sg

More articles from Life Sciences:

nachricht Switch for building barrier in roots
29.07.2015 | The University of Tokyo

nachricht How to make chromosomes from DNA
29.07.2015 | The University of Tokyo

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Superfast fluorescence sets new speed record

Plasmonic device has speed and efficiency to serve optical computers

Researchers have developed an ultrafast light-emitting device that can flip on and off 90 billion times a second and could form the basis of optical computing.

Im Focus: Unlocking the rice immune system

Joint BioEnergy Institute study identifies bacterial protein that is key to protecting rice against bacterial blight

A bacterial signal that when recognized by rice plants enables the plants to resist a devastating blight disease has been identified by a multi-national team...

Im Focus: Smarter window materials can control light and energy

Researchers in the Cockrell School of Engineering at The University of Texas at Austin are one step closer to delivering smart windows with a new level of energy efficiency, engineering materials that allow windows to reveal light without transferring heat and, conversely, to block light while allowing heat transmission, as described in two new research papers.

By allowing indoor occupants to more precisely control the energy and sunlight passing through a window, the new materials could significantly reduce costs for...

Im Focus: Simulations lead to design of near-frictionless material

Argonne scientists used Mira to identify and improve a new mechanism for eliminating friction, which fed into the development of a hybrid material that exhibited superlubricity at the macroscale for the first time. Argonne Leadership Computing Facility (ALCF) researchers helped enable the groundbreaking simulations by overcoming a performance bottleneck that doubled the speed of the team's code.

While reviewing the simulation results of a promising new lubricant material, Argonne researcher Sanket Deshmukh stumbled upon a phenomenon that had never been...

Im Focus: NASA satellite camera provides 'EPIC' view of Earth

A NASA camera on the Deep Space Climate Observatory (DSCOVR) satellite has returned its first view of the entire sunlit side of Earth from one million miles away.

The color images of Earth from NASA's Earth Polychromatic Imaging Camera (EPIC) are generated by combining three separate images to create a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

3rd Euro Bio-inspired - International Conference and Exhibition on Bio-inspired Materials

23.07.2015 | Event News

Clash of Realities – International Conference on the Art, Technology and Theory of Digital Games

10.07.2015 | Event News

World Conference on Regenerative Medicine in Leipzig: Last chance to submit abstracts until 2 July

25.06.2015 | Event News

 
Latest News

Lobster-Eye imager detects soft X-ray emissions

29.07.2015 | Physics and Astronomy

First detection of lithium from an exploding star

29.07.2015 | Physics and Astronomy

Controlling phase changes in solids

29.07.2015 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>