Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Blueberries counteract intestinal diseases

08.02.2010
It is already known that blueberries are rich in antioxidants and vitamins. New research from the Lund University Faculty of Engineering in Sweden shows that blueberry fibre are important and can alleviate and protect against intestinal inflammations, such as ulcerative colitis. The protective effect is even better if the blueberries are eaten together with probiotics.

The project originated as an attempt to see whether various types of dietary fibre and health-promoting bacteria, so-called probiotic bacteria such as lactobacillus and bifidobacteria, can help alleviate and prevent the risk of ulcerative colitis and colorectal cancer.

"But new knowledge of this field is also of interest to those who don't believe they run the risk of developing any intestinal diseases. In recent years the research world has been realizing that our health is governed to a great extent by what happens in our large intestine," explain Camilla Bränning, a PhD in Applied Nutrition and Åsa Håkansson, a doctoral candidate in Food Hygiene at the Division of Applied Nutrition and Food Chemistry.

The researchers tested various types of diets of blueberry husks, rye bran and oat bran with or without a mixture of probiotic bacteria. The results showed that the protective effect of blueberries was reinforced if they were eaten together with probiotics.

"The probiotics proved to have a protective effect on the liver, an organ that is often negatively impacted by intestinal inflammations," explains Åsa Håkansson.

Blueberries are rich in polyphenols, which have an antimicrobial and antioxidative effect. The combination of blueberries and probiotics reduced inflammation-inducing bacteria in the intestine at the same time as the number of health-promoting lactobacilla increased.

Åsa Håkansson and Camilla Bränning also noted that if blueberries are eaten together with probiotics, the content of butyric acid and propionic acid increased in the blood, two substances that are formed when fibre are broken down and that have previously been known to be important energy sources for intestinal cells. In recent years they have also been shown to favourably impact the immune defence. It seems as if the absorption of these components is facilitated by the presence of probiotics.

"What surprised us was that such a large share of the butyric acid not only was taken up by the intestinal cells but was also transported onward to the blood. Previously it was thought that the intestinal cells used all of the butyric acid, but this is not at all the case," says Camilla Bränning, who recently defended her dissertation on the subject.

"A further explanation for the extremely positive effect of blueberries may be that the blueberry fibre are not degraded to such a high degree in the large intestine. This means that inflammation-inducing substances do not come into contact with the mucous lining of the intestine but are embedded in the fibre instead. Then these substances are transported out of body together with the faeces," explains Camilla Bränning.

The researchers also found that rye bran was broken down in the large intestine, in the same place that ulcerative colitis and large-intestine cancer often occur, and that the rye bran provided a rich supply of butyric acid and propionic acid. On the other hand, the fibre in oat bran were degraded earlier in the large intestine. The most striking result, however, was that blueberries themselves had such a favourable effect compared with both rye bran and oat bran.

Some 15-20 percent of all Swedes suffer from stomach pains, diarrhoea, or constipation, complaints resulting from intestinal disorders and more undefined intestinal problems. The disease ulcerative colitis is one of the inflammatory intestinal diseases included under the general name IBD, inflammatory bowel diseases. It can lead to colorectal cancer and afflicts about 1,000 Swedes per year.

For more information, please contact Camilla Bränning, researcher in Applied Nutrition and Food Chemistry, phone: +46 (0)46-2224727, Camilla.Branning@appliednutrition.lth.se,

Åsa Håkansson, researcher in Food Hygiene, phone: +46 (0)46-2228326, Asa.Hakansson@appliednutrition.lth.se

Margareta Nyman, professor of Applied Nutrition and Food Chemistry, phone: +46 (0)46-2224567, mobile: +46 (0)704-97 46 80, Margareta.Nyman@appliednutrition.lth.se,

Siv Ahrné, professor of Food Hygiene, phone: +46 (0)46-2228327, mobile: +46 (0)703-484 516, Siv.Ahrne@appliednutrition.lth.se.

Pressofficer Kristina Lindgärde, kristina.lindgarde@kansli.lth.se;
+46-709 753 500

Ingemar Björklund | idw
Further information:
http://www.lu.se/o.o.i.s?id=12588&postid=1520883
http://www.vr.se

More articles from Life Sciences:

nachricht Multi-institutional collaboration uncovers how molecular machines assemble
02.12.2016 | Salk Institute

nachricht Fertilized egg cells trigger and monitor loss of sperm’s epigenetic memory
02.12.2016 | IMBA - Institut für Molekulare Biotechnologie der Österreichischen Akademie der Wissenschaften GmbH

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

Im Focus: Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

UTSA study describes new minimally invasive device to treat cancer and other illnesses

02.12.2016 | Medical Engineering

Plasma-zapping process could yield trans fat-free soybean oil product

02.12.2016 | Agricultural and Forestry Science

What do Netflix, Google and planetary systems have in common?

02.12.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>