Vitamin A may one day cure Emphysema

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Vitamin may cure smoking disease

Smoking can cause emphysema

A form of vitamin A could one day provide the basis for a cure for the

smoking disease emphysema.

British researchers have found that retinoic acid, a derivative of

vitamin A, can cure the disease in mice.

Writing in the European Respiratory Journal, they said it reverses

damage done to tiny air sacs in the lungs.

There is currently no cure for emphysema. The disease causes

progressive damage to the lungs and can eventually kill.

Breathing problems

Emphysema usually affects older people. It is generally the result of

long-term damage to the lungs, such as a lifetime of smoking. It can also

affect people working in certain industries such as mining.

The disease can start as mild breathlessness. However, over time it

can leave sufferers struggling to breathe and reliant on oxygen.

This is a relatively simple compound to take. It is already use

to treat severe acne

Professor Malcolm Maden

It occurs when the tiny air sacs in the lungs called alveoli, through

which oxygen is absorbed into the bloodstream, lose their natural

elasticity.

This means spent air is pushed back out into the lungs. The lungs feel

overfull and it is a struggle for sufferers to push air in and out.

This eventually means that the body is not getting enough oxygen,

leading to fatigue and weight loss.

Scientists believe that if they can return the tiny air sacs in the

lungs to their former healthy state they can cure the disease.

This latest study by Professor Malcolm Maden and colleagues at the

Medical Research Council's Centre for Developmental Neurobiology at King's

College London raises hopes that a cure can one day be found.

The researchers bred mice with all the hallmarks of emphysema. The

mice had been given a chemical soon after birth, which prevented the tiny

air sacs in the lungs from developing properly.

By the time these mice were adults they had serious breathing problems

and their lungs were unable to exchange gases effectively.

When these mice were given retinoic acid, the number and size of the

tiny air sacs in the lungs returned to normal. Their lungs exchanged gases

more effectively and they were able to breathe more easily.

Triggers genes

The researchers believe that retinoic acid triggers key genes into

action, enabling the tiny air sacs to recover.

While further studies are needed, this research raises hopes that

retinoic acid could form the basis of a cure for emphysema.

Professor Maden said it could also provide the basis for a treatment

for the severe lung disease COPD or chronic obstructive pulmonary disease.

" This would be quite significant, " he told BBC News Online. " Incidence

of emphysema and COPD are rocketing world-wide.

" This is a relatively simple compound to take. It is already used to

treat severe acne.

" Being able to cure these conditions would be quite significant. "