New research suggests regular Boysenberry consumption may improve lung function by reducing symptoms associated with inflammation of the airways, which can cause conditions such as asthma.

Previous studies found lung function can be improved by consuming fruits containing high levels of antioxidant compounds known as polyphenols, although the underlying mechanisms behind this are largely unknown.

No just a sour berry, boysenberries may improve lung function. Picture: Supplied.

Through their investigations with berryfruits scientists at Plant & Food Research, in collaboration with the Wellington-based Malaghan Institute of Medical Research, have made new discoveries on the role polyphenols play in reducing the effects of asthma and chronic airway inflammation.

The MBIE-funded research examined two key agents associated with regulating lung inflammation: arginase, closely linked with decreased inflammation in asthma; and matrix metalloproteinase-9, associated with improved tissue remodelling.

'We've seen some really exciting results from this recent study,” says Plant & Food Research science group leader, Dr Roger Hurst.

'Our results suggest that Boysenberry consumption may help protect the lungs and associated airways from the chronic build-up of damaged and scar tissue.

'These agents appear to support an environment capable of reducing scar tissue deposits on the lungs.”

The research also saw structural improvements in the lungs through the activation of specific immune cell types which are known to assist tissue repair and retention of normal lung function.

The findings provide the first evidence that eating boysenberries could be used to support the body's natural defences and potentially reduce negative physical effects on the lungs caused by asthma and other chronic pulmonary conditions.

Globally it is estimated that 150 million people are affected by asthma, with children making up around 10 percent of sufferers. In New Zealand, one of every nine adults and every seven children are prescribed asthma medication.

The research has been published in American Journal of Physiology: Lung Cellular and Molecular Physiology, a top ten ranked journal on respiratory systems.