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Global Statistics

All countries
695,781,740
Confirmed
Updated on September 26, 2023 9:04 pm
All countries
627,110,498
Recovered
Updated on September 26, 2023 9:04 pm
All countries
6,919,573
Deaths
Updated on September 26, 2023 9:04 pm

Global Statistics

All countries
695,781,740
Confirmed
Updated on September 26, 2023 9:04 pm
All countries
627,110,498
Recovered
Updated on September 26, 2023 9:04 pm
All countries
6,919,573
Deaths
Updated on September 26, 2023 9:04 pm

Hope for people with Parkinson’s after scientists eliminate the disease in mice

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Hope for people with Parkinson’s after scientists eliminate the disease in mice using treatment that generates new brain cells

  • Researchers created new brain cells in mice after rewriting other types of cells 
  • They implanted the newly produced brain cells in mice with Parkinson’s disease 
  • The team found that this helped to ‘cure’ the mice of their degenerative disease 

By Ryan Morrison For Mailonline

Published: | Updated:

A breakthrough that led to the creation of new neurons in mice could be used to transplant brain cells in Parkinson’s patients and cure them of the disease.

University of California San Diego School of Medicine researchers created neurons in mice using a new, much simpler method that involved rewriting genes.  

Parkinson’s disease is characterised by a loss of dopaminergic neurons in a region of the brain responsible for reward and movement – replacing those cells could help to reduce or even reverse the symptoms of the degenerative disease.

A small study involving mice with Parkinson’s saw those given the ‘new neuron treatment’ return to normal within three months and stay disease free for life.

The researchers said it could one day be used to ‘cure’ any disease caused by the loss of neurons but warned this was a long way off and hadn’t been tested.

Left: mouse cells (green) before reprogramming and then right shows neurons (red) induced from mouse cells after reprogramming. University of California San Diego School of Medicine researchers created these neurons in mice using a new much simpler method

Parkinson’s disease is characterised by a loss of dopaminergic neurons in a region of the brain responsible for reward and movement – replacing those cells could help to reduce or even reverse the symptoms of the degenerative disease

Xiang-Dong Fu and his team say their findings suggest certain brain cells called astrocytes can be turned into functional dopaminergic neurons.

It is early in the research, but these newly produced brain cells could one day be implanted into a Parkinson’s patient to help their condition.

‘It’s my dream to see this through to clinical trials, to test this approach as a treatment for Parkinson’s disease, but also many other diseases where neurons are lost, such as Alzheimer’s and Huntington’s diseases and stroke,’ 

The study published in Nature was conducted in isolated human cells and in mice.

‘Researchers around the world have tried many ways to generate neurons in the lab, using stem cells and other means, so we can study them better, as well as to use them to replace lost neurons in neurodegenerative diseases,’ said Dr Fu.

‘The fact that we could produce so many neurons in such a relatively easy way came as a big surprise,’ the lead author on the paper said. 

Astrocytes produce a protein which prevents them from becoming neurons but by removing this protein they are converted into fully functional neurons. 

As part of this study the team found new neurons can repopulate circuits in the brain, restore dopamine levels and rescue motor function in mice with Parkinson’s. 

But they caution that further research is needed before the approach can be applied to humans as it has only been studied in mice brains.

The researchers administered the treatment directly to a part of the mouse’s brain, which is responsible for regulating motor control and reward behaviour.

They also added it to the part of the brain that typically loses dopamine-producing neurons in Parkinson’s disease.

A control group of mice received mock treatment without any new neurons.

Top: Mouse brain before reprogramming, with dopaminergic neurons shown in green. Bottom: Mouse brain after reprogramming with PTB antisense oligonucleotide treatment, which converted astrocytes into more dopaminergic neurons (green) 

In the treated mice, a small subset of astrocytes converted to neurons, increasing the number of neurons by approximately 30 per cent, the study suggests.

Dopamine levels were restored to a level comparable to that in normal mice.

By two different measures of limb movement and response, the treated mice returned to normal within three months after a single treatment.

They remained completely free from symptoms of Parkinson’s disease for the rest of their lives but the control group showed no improvement.

Professor Tara Spires-Jones of the UK Dementia Research Institute at the University of Edinburgh and deputy director of the Centre for Discovery Brain Sciences, University of Edinburgh, said the study shows remarkable promise.

‘It is important to note that it was conducted in mice with group sizes from three to eight and there is a long way to go to translate this into a treatment for people.’

Robert Howard, professor of old age psychiatry, at University College London, said the findings were an ‘extraordinary scientific discovery’.

He added: ‘This opens up a completely novel avenue for development of treatments to ‘rebuild’ damaged brains in Alzheimer’s and Parkinson’s diseases.’

The findings have been published in the journal Nature. 

WHAT IS PARKINSON’S? THE INCURABLE DISEASE THAT STRUCK BOXER MUHAMMAD ALI

Parkinson’s disease affects one in 500 people, and around 127,000 people in the UK live with the condition.

Figures also suggest one million Americans also suffer.

It causes muscle stiffness, slowness of movement, tremors, sleep disturbance, chronic fatigue, an impaired quality of life and can lead to severe disability.

It is a progressive neurological condition that destroys cells in the part of the brain that controls movement.

Sufferers are known to have diminished supplies of dopamine because nerve cells that make it have died.

There is currently no cure and no way of stopping the progression of the disease, but hundreds of scientific trials are underway to try and change that.  

The disease claimed the life of boxing legend Muhammad Ali in 2016.

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