Emerging evidence of an impending Parkinson disease pandemic identified

Jan 30, 2019

For most of human history Parkinson disease has been a rare disorder. However, demography and the by-products of industrialization are now contributing to an impending Parkinson disease pandemic, according to experts writing in a supplement to the Journal of Parkinson's Disease. They say that this pandemic can be addressed by the Parkinson disease community forming a "PACT" to prevent the disease, advocate for policies and resources aimed at slowing its spread, care for all those affected, and treat with effective and novel therapies.

Neurological disorders are now the leading cause of disability globally, and the fastest growing neurological disorder in the world is Parkinson disease, a slowly progressive disorder that affects movement, muscle control, and balance. In 1855, forty years after Dr. James Parkinson first described the condition, approximately 22 people of 15 million in England and Wales died of Parkinson disease. In 2014, roughly 5,000 to 10,000 individuals of 65 million in the UK died of Parkinson disease. From 1990 to 2015, the number of people with Parkinson disease doubled worldwide to over 6 million. Driven principally by aging, this number is projected to double again to over 12 million by 2040, and additional factors, including increasing longevity, declining smoking rates, and increasing industrialization, could raise the burden to over 17 million.

"By 2040, we can truly talk about a pandemic that will result in increased human suffering, as well as rocketing societal and medical costs. How can the community be made aware of this scenario and implement changes in research priorities and care programs to lessen the burden of the upcoming pandemic?" cautioned Patrik Brundin MD PhD, Van Andel Research Institute, Grand Rapids, MI, USA, Editor-in-Chief of the Journal of Parkinson's Disease.

According to lead author Ray Dorsey MD, from the Department of Neurology and Center for Health and Technology, University of Rochester Medical Center, Rochester, NY, USA, "The tide of Parkinson disease is rising and spreading. Parkinson disease exacts an enormous human toll on those with the disease and those around them. The strain of caregiving has adverse health consequences of its own. The economic costs of Parkinson disease are also substantial, poised to grow, and at least in the US, overwhelmingly directed at institutional care, which few desire."

The incidence of Parkinson disease increases with age and the world's population is aging, as the number and proportion of individuals over 65 is rapidly growing. The combined result of these two factors is an unprecedented rise in the number of people with Parkinson disease.

Independent of Parkinson disease, global life expectancy has increased by 6 years in the last 2 decades. This will likely increase the number of individuals with advanced Parkinson disease who are more difficult to treat and can have limited access to care. Numerous studies have found that the risk of Parkinson disease decreases among smokers by approximately 40%. If the association is causal, which remains to be determined, decreasing smoking rates could lead to higher rates of Parkinson disease

Finally, the by-products of industrialization may be contributing to the rising rates of Parkinson disease. Specific pesticides, solvents, and heavy metals, have been linked to Parkinson disease - exposure to these agents is preventable.

"In the past century, society has successfully confronted pandemics of polio, breast cancer, and HIV to varying degrees. Central to the success of these efforts was unbridled activism," stated Dr. Dorsey. Following these examples, the authors propose that the Parkinson disease community form a "PACT" to prevent, advocate for, care, and treat the disease through understanding the root causes (environmental, genetic, and biological), expanding new care models that seek to bring expert care to all, and developing new highly effective therapies. The most effective therapy (levodopa) is now 50 years old.

"We hope that this article will raise awareness of the challenge and form the basis for a community-led response to address one of the great health challenges of our time," added co-author and Associate Editor of the Journal of Parkinson's Disease Bastiaan R Bloem MD PhD, from the Radboud University Medical Center, Donders Institute for Brain, Cognition and Behavior, Department of Neurology, Nijmegen, The Netherlands.

"The Parkinson disease pandemic is preventable, not inevitable," conclude the authors.

Source: News Release
IOS Press
January 29, 2019