Written by Jesse Saffron, Ph.D., National Institute of Environmental Health Sciences. Used by permission
The reality is that today, we still dont have a treatment that slows or alters the progression ofParkinsons disease, saidDavid Standaert, M.D., Ph.D.
In 1817, James Parkinson published An Essay on the Shaking Palsy, describing the disease that now bears his surname. The British surgeons proposed treatment bloodletting proved ineffective, and the intervening two centuries led to no breakthroughs for patients.
The reality is that today, we still dont have a treatment that slows or alters the progression ofParkinsons disease, saidDavid Standaert, M.D., Ph.D., during a Jan. 8 talk at the National Institute of Environmental Health Sciences. He is chair of the Department of Neurology at the University of Alabama at Birmingham. We can help patients function better, but were not changing the underlying nature of the disease.
Parkinsons disease is complex, involvinggenetic and environmental factors, and their interaction.Guohong Cui, M.D., Ph.D., head of the NIEHS In Vivo Neurobiology Group, invited Standaert to discuss the role immunity plays in the disorder. Both researchers seek to discover ways to slow advancement of the condition and make it less severe.
Dr. Standaert is an established researcher in the Parkinsons field, which is one of the major areas my lab works in, Cui said. His team examines how pesticides interact with genetic factors associated with the disease and ways to slow dopamine loss, which is a hallmark of the disorder.
At UAB, Standaert directs the Morris K. Udall Center of Excellence in Parkinsons Disease Research, one of eight such centers funded by theNational Institute of Neurological Disorders and Stroke. One of his research questions is whether immune system responses to a protein called alpha-synuclein trigger neurodegeneration.
Alpha-synuclein is a cornerstone of research in Parkinsons disease, Standaert told the audience. It is a small protein present in high levels in neurons throughout the brain. It participates in virtually every form of the disease, whether through mutation, overexpression or aggregation, which is probably the most common mechanism.
Abnormal forms of alpha-synuclein may activate immune cells in the brain, leading to inflammation that drives progression of the disorder.
For many years, it was said that this is a degenerative disease and cells are dying, so, of course, theres inflammation, he said. I think in the last few years, weve turned this around and realized that the inflammation may come first, as part of a process that leads to degeneration.
When mutated, the LRRK2 protein can worsen problems caused by alpha-synuclein. It is one of the most common genetic causes of Parkinsons. In our clinic, about 2 to 3 percent of patients have LRRK2 mutations, he noted. Those mutations may cause Parkinsons by cranking up sensitivity of the immune system they may increase the magnitude of the response to alpha-synuclein.
But other factors bear consideration. To study the mechanisms responsible for Parkinsons disease, there is a need for model systems that replicate the effects of environmental toxins, Standaert said. He highlighted research by NIEHS grantee Briana De Miranda, Ph.D., of the University of Pittsburgh. She studies, among other things, how organic solvents may boost susceptibility to Parkinsons disease in individuals with LRRK2 mutations.
Standaert says the fact that inflammation may cause the disorder to advance more than it otherwise would means that anti-inflammatory drugs could hold promise. We have immunologic treatments for a lot of other diseases, such as inflammatory bowel disease, psoriasis and multiple sclerosis, Standaert said in an interview. Could we use one of those or something similar in Parkinsons disease to slow its progression?
Read more:
Parkinson's driven by inflammation, genetics and the environment - UAB News
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