Butyrylcholinesterase as a Diagnostic and Therapeutic Target for Alzheimer's Disease.

Abstract:

:The serine hydrolase butyrylcholinesterase (BChE), like the related enzyme acetylcholinesterase (AChE), co-regulates metabolism of the neurotransmitter acetylcholine. In the human brain BChE is mainly expressed in white matter and glia and in distinct populations of neurons in regions that are important in cognition and behavior, functions compromised in Alzheimer's disease (AD). AD is a neurodegenerative disorder causing dementia with no cure nor means for definitive diagnosis during life. In AD, BChE is found in association with pathology, such as β-amyloid (Aβ) plaques, particularly in the cerebral cortex where BChE is not normally found in quantity. Up to 30% of cognitively normal older adults have abundant Aβ deposition in the brain. We have designed an imaging agent that can detect, through autoradiography, BChE-associated Aβ plaques in the cerebral cortex of AD brains, but does not visualize Aβ plaques in brains of cognitively normal individuals. Furthermore, in an AD mouse model with BChE gene knocked out, there are up to 70% fewer fibrillar Aβ brain plaques, suggesting diminished BChE activity could prove beneficial as a curative approach to AD. To that end, we have examined numerous N-10-carbonyl phenothiazines that are specific inhibitors of human BChE, revealing important details of the enzyme's active site gorge. These phenothiazines can be designed without potential side effects caused by neurotransmitter receptor interactions. In conclusion, BChE is potentially an important target for diagnosis and treatment of AD.

journal_name

Curr Alzheimer Res

authors

Darvesh S

doi

10.2174/1567205013666160404120542

subject

Has Abstract

pub_date

2016-01-01 00:00:00

pages

1173-7

issue

10

eissn

1567-2050

issn

1875-5828

pii

CAR-EPUB-74774

journal_volume

13

pub_type

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