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Dementia with Lewy bodies (DLB) is a type of dementia, a group of diseases involving progressive neurodegeneration of the central nervous system. [11] It is one of the two Lewy body dementias, along with Parkinson's disease dementia.
[12] [13] The Lewy body dementias—dementia with Lewy bodies (DLB), and Parkinson's disease dementia (PDD)—are distinguished by the timing when cognitive and motor symptoms appear. [14] The two Lewy body dementias are often considered to belong on a spectrum of Lewy body disease that includes Parkinson's disease. [2] [5]
DLB is diagnosed when cognitive symptoms begin before or at the same time as parkinsonism. Parkinson's disease dementia is the diagnosis when Parkinson's disease is well established before the dementia occurs; that is, the onset of dementia is more than a year after the onset of parkinsonian symptoms. [9]
Early intervention could reduce your risk of developing dementia-related disease
In the study, published in the journal Nature Aging on Feb. 12, researchers were able to pinpoint a biomarker, or a common imprint in the blood, for people at-risk for dementia.
The DNA repair function of alpha-synuclein appears to be compromised in Lewy body inclusion bearing neurons, and this may trigger cell death. Study of synucleinopathy mouse models of Parkinson's disease indicates that alpha-synuclein pathogenesis is associated with increased DNA damage and activation of the DNA damage response.
Lewy Body Dementia (LBD) is the second-most common form of dementia after Alzheimer’s disease; However, unlike most well-known forms of dementia, LBD isn’t characterized by memory loss.
In histopathology, cortical Lewy bodies are a distinguishing feature for dementia with Lewy bodies, but may occasionally be seen in ballooned neurons characteristic of behavioural variant frontotemporal dementia and corticobasal degeneration, [18] as well as in patients with other tauopathies. [19]
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