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Dementia with Lewy bodies and Parkinson's disease dementia are similar in many ways, suggesting there may be a common pathophysiological mechanism, with PDD and DLB at opposite ends of a Lewy body disease spectrum, [2] and a shared component of protein deposits in Lewy bodies and Lewy neurites. [17]
Parkinson's disease dementia (PDD) is dementia that is associated with Parkinson's disease (PD). [1] Together with dementia with Lewy bodies (DLB), it is one of the Lewy body dementias characterized by abnormal deposits of Lewy bodies in the brain. [2] [3] [4] [5]
Dementia with Lewy bodies (DLB), may or may not be part of the PD spectrum, but it is increasingly recognized as the second-most common type of neurodegenerative dementia after Alzheimer's disease. These disorders are currently lumped into two groups, the synucleinopathies and the tauopathies .
A brain tissue with Lewy bodies. The first major proposed cause of neuronal death in Parkinson's disease is the bundling, or oligomerization, of proteins.The protein alpha-synuclein has increased presence in the brains of Parkinson's Disease patients and, as α-synuclein is insoluble, it aggregates to form Lewy bodies (shown to left) in neurons.
The hallmark of Parkinson's is the formation of protein aggregates, beginning with alpha-synuclein fibrils and followed by Lewy bodies and Lewy neurites. [76] The prion hypothesis suggests that alpha-synuclein aggregates are pathogenic and can spread to neighboring, healthy neurons and seed new aggregates.
Researchers have found that people who take a type of type 2 diabetes drugs SGLT2 inhibitors have a significantly lower risk of dementia, overall, and of Alzheimer's disease and Parkinson's, in ...