Japanese superfood prevents flu infection

November 5, 2013

Scientists have discovered that bacteria found in a traditional Japanese pickle can prevent flu. Could this be the next superfood?

The research, which assesses the immune-boosting powers of Lactobacillus brevis from Suguki – a pickled turnip, popular in Japan – in mice that have been exposed to a virus, is published today in the SfAM journal, Letters in Applied Microbiology.

Lead researcher, Ms Naoko Waki of KAGOME CO., LTD. in Japan said: "Our results show that when a particular strain of Lactobacillus brevis is eaten by mice, it has protective effects against ."

Suguki enthusiasts have often cited its protective powers but it is not known yet whether the same effects will be seen in humans. Human clinical trials using a probiotic drink containing Lactobacillus brevis KB290 are underway and scientists are hopeful that, given a suitable quantity of bacteria, foods containing them may turn out to be the next superfood.

What it is about the bacteria that gives them this amazing property is not known, but it is remarkably tolerant to stomach juices, which are too acidic for many bacteria. This is largely due to a protective layer of sugars called exopolysaccharides.

"We know that exopolysaccharides have immune boosting effects in other similar bacteria, so we wonder if the exopolysaccharides of KB290 are responsible for the effects we see," said Ms Waki. Further studies will be undertaken to investigate this.

The effect of the bacteria is to increase the production of immune system molecules in the body – IFN-α and flu-specific antibodies – and to enhance activity to eradicate virus infected cells. In this study these effects were sufficient to prevent infection by the H1N1 flu and the scientists think that there could also be protection against other viral infections, including the deadly H7N9 flu, which has recently emerged in China.

Related Stories

Recommended for you

How nature punches back at giant viruses

September 4, 2015

(Phys.org)—What have viruses ever done for humans? The question is debatable, but given the prevalence of highly contagious, and sometimes life-threatening illnesses caused by viruses, it's fair to say that most people ...

Secrets of a heat-loving microbe unlocked

September 4, 2015

Scientists studying how a heat-loving microbe transfers its DNA from one generation to the next say it could further our understanding of an extraordinary superbug.

Plants also suffer from stress

September 4, 2015

High salt in soil dramatically stresses plant biology and reduces the growth and yield of crops. Now researchers have found specific proteins that allow plants to grow better under salt stress, and may help breed future generations ...

Ancient walnut forests linked to languages, trade routes

September 4, 2015

If Persian walnut trees could talk, they might tell of the numerous traders who moved along the Silk Roads' thousands of miles over thousands of years, carrying among their valuable merchandise the seeds that would turn into ...

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.