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Monday, May 16, 2016

Could genetically modified WORMS help CURE Alzheimer’s and Parkinson’s disease?

SCIENTISTS have been awarded funding to use genetically modified worms to help with the fight against Alzheimer’s and Parkinson’s. 

Scientists will be testing worms to find a cure for the disease


The funding, from the Leverhulme Trust to Canterbury Christ Church University, will allow academics to begin  a two year research project that will seek to identify why some versions of genes make worms more resistant to the damage caused by the Alzheimer’s and Parkinson’s related proteins. 
There are nearly a million people in the UK currently diagnosed with either Alzheimer’s or Parkinson’s -  a figure which is expected to rise as there is still no cure for the degenerative brain diseases.
The worms will be given human genes relating to Alzheimer’s and Parkinson’s disease. Researchers said worms were chosen because of their accelerated life-span and close geneticlink to human pathology.
The project will be able to follow an individual worm’s entire life, through disease progression and monitor key stages and changes in less than a month.
Dr Simon Harvey from the School of Human and Life Sciences is set to lead the project.
“Dementia is an increasing global concern,” he said. “Whilst details of the causes of diseases such as Parkinson’s, Alzheimer’s and Huntington’s differ, they are linked by incorrect protein folding.
“To improve the outcome for people with dementia, we need to understand the factors that determine who develops the disease, and how quickly that disease then progresses.
“We understand some of this, but many questions still remain to be answered. Particularly important is to identify and understand the genetic differences between people that affect both incidence and disease progression. 
Part of the study will look at the behaviour of worms' proteins
“A mutation in a gene can cause cells within the brain to increase the production of protein. Those proteins then misfold and clump or stick together into ‘plaques’. At the same time ’tangles’ develop, which are twisted protein fibres formed inside a dying cell.
In the case of Alzheimer’s it is the plaque and tangles that are the underlying pathology for the disease. For Parkinson’s, the excessive production of protein or misfolding causes damage to nerve cells specific to the production of dopamine. The decrease in dopamine signalling is the cause of that condition’s pathology. 
“For the first strand of the project we will be using worms that have the human Parkinson’s gene and monitoring how protein is being expressed and produced, and how it aggregates or sticks together. The protein produced will be fluorescently labelled so we will be able to clearly detect how it is behaving.”
Dr Harvey will be using worms with different genetic backgrounds, the equivalent of looking at the genetic history of distant family members, to gain a greater understanding of how genetic variations can affect the pathology of the disease.
Scientists hope the study will give more clues about the development of the disease
He added: “Preliminary data has shown that some of the worms with the human Parkinson’s gene, but with different genetic backgrounds, differ in how much protein is produced and in how it sticks together.
"We hope that this part of the project will help us to understand why these differences occur; why some worms are better able to tolerate the misfolding of proteins and why they vary in the overall impact Parkinson’s has upon their lives.”

A similar process will be used when looking at the development of Alzheimer’s pathology. Worms with different genetic backgrounds will have the human Alzheimer’s gene, but in this case Dr Harvey will be lookomg at what happens to the development of the disease as the worms’ age.

“As the worm gets older they will experience greater paralysis due to more and more protein plaques and tangles. It’s actually a very close mirror to the pathology of Alzheimer’s in humans.

“Here we will be looking at whether there is genetic variation between worms that accelerates paralysis.
Scientists will be looking at mutations with increase the production of protein
Dr Harvey said the hope is that the study will find a difference in one of the fundamental processes of how cells work - and because of the way the disease progresses in worms, there is a 'possibility' scientists can apply that knowledge to humans with the potential to be able to make cells more capable of dealing with misfolded proteins.

“We hope to find a genetic marker involved in refolding proteins that will help to identify why some people are more susceptible to certain types of dementia. It might be that one genome is better at tolerating these proteins than others," he added.

"It might be one is better at folding them correctly; or one might be better at breaking the protein down.”

The final part of the project will look specifically at the production and behaviour of the worms’ normal proteins as they age. By looking at three different types of proteins, it is hoped that the project will offer a general understanding of the process, one that is not specific to one disease.

http://www.express.co.uk/life-style/health/670692/worms-help-cure-Alzheimer-s-Parkinson-s-disease

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