- Scientists at Sweden's Lund University have hailed study a 'breakthrough'
- Found stem cells can heal the damage caused by Parkinson's disease
- Parkinson's UK said there remain many questions before human trials
They said their study on rats heralded a 'huge breakthrough' towards developing effective treatments.
There is no cure for the disease, but medication and brain stimulation can alleviate symptoms.
The disease is caused by the loss of nerve cells in the brain that produce the chemical dopamine, which helps to control mood and movement.
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Comedian Billy Connolly revealed last year he had been diagnosed with Parkinson’s.
The Scottish actor, 71, was diagnosed by a doctor in a hotel lobby, who spotted that his gait suggested he was showing early signs of the illness.
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In the new study, to simulate Parkinson's, Lund University researchers killed dopamine-producing neurons on one side of the rats' brains.
They then converted human embryonic stem cells into neurons that produced dopamine.
These were injected into the rats' brains, and the researchers found evidence that the damage was reversed similar method has been tried in a limited number of patients.
It involved taking brain tissue from multiple aborted foetuses to heal the brain.
Clinical trials were abandoned after mixed results, but about a third of the patients had foetal brain cells that functioned for 25 years.
Using embryonic stem cells may be preferable, as it is easier to get hold of the large numbers of cells needed for transplant by growing them in the laboratory.
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| But Parkinson's UK has said there are still questions that must be answered before human trials can proceed. The disease is caused by the loss of nerve cells in the brain that produce the chemical dopamine, which helps to control mood and movement |
It also opens up the possibility of using less ethically charged sources of stem cells, such as those made from adult tissue.
The charity Parkinson's UK said the research 'could be a stride towards clinical trials in people with Parkinson's'.
Its director of research and development, Arthur Roach, said: 'This important research is a key step along the way in helping us to understand how stem cells might shape future Parkinson's treatments.
'There are important potential advantages of these cells over the foetal-derived cells used in past cell transplantation work.
'This study could be a stride towards clinical trials in people with Parkinson's but there are still many questions that need to be answered before this development can be tested in people with the condition.'
Read more: http://www.dailymail.co.uk/health/article-2825248/Damage-caused-Parkinson-s-disease-healed-using-stem-cells.html#ixzz3IQopy8t7
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