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Why gums suffer with age 'found'

Study hints at why gums suffer with ageResearchers have finally shed light on why gum disease can become more common with old age - the deterioration in gum health which often occurs with increasing age is associated with a drop in the level of chemical Del-1.

A team at the University of London says that understanding more about Del-1 and its effects on the body's immune system could help in the treatment or prevention of serious gum disease.

Periodontitis is a disease of the gums which causes bleeding and bone loss which can, over time, lead to loss of teeth. It is caused by an over-active immune response to bacteria that grow in the mouth.

The researchers investigated gum disease in young and old mice and found that an increase in gum disease in the older animals was accompanied by a drop in the level of Del-1.

This protein is known to restrain the immune system by stopping white blood cells from sticking to and attacking mouth tissue. Mice that had no Del-1 developed severe gum disease and elevated bone loss and researchers found unusually high levels of white blood cells in the gum tissue.

When they treated the gums of the mice with Del-1, the number of white blood cells dropped, and gum disease and bone loss were reduced.

The researchers say their findings could be the basis for a new treatment or prevention of gum disease.

Prof Mike Curtis, who led the study, said: "Periodontitis is an extremely common problem and we know that the disease tends to be more common as we get older.

"This research sheds some light on why ageing makes us more susceptible and understanding this mechanism is the first step to an effective treatment."

The findings are published in the 'Nature Immunology' journal.

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