Abstract
Introduction The extensive loss of central cholinergic functions in Alzheimer's disease (AD) brain is linked to impaired nerve growth factor (NGF) signaling. The cardinal cholinergic biomarker is the acetylcholine synthesizing enzyme, choline acetyltransferase (ChAT), which has recently been found in cerebrospinal fluid (CSF). The purpose of this study was to see if EC-NGF therapy will alter CSF levels of cholinergic biomarkers, ChAT, and acetylcholinesterase. Method Encapsulated cell implants releasing NGF (EC-NGF) were surgically implanted bilaterally in the basal forebrain of six AD patients for 12 months and cholinergic markers in CSF were analyzed. Results Activities of both enzymes were altered after 12 months. In particular, the activity of soluble ChAT showed high correlation with cognition, CSF tau and amyloid-β, in vivo cerebral glucose utilization and nicotinic binding sites, and morphometric and volumetric magnetic resonance imaging measures. Discussion A clear pattern of association is demonstrated showing a proof-of-principle effect on CSF cholinergic markers, suggestive of a beneficial EC-NGF implant therapy.
Original language | English |
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Pages (from-to) | 1316-1328 |
Number of pages | 13 |
Journal | Alzheimer's and Dementia |
Volume | 11 |
Issue number | 11 |
DOIs | |
Publication status | Published - Nov 2015 |
Bibliographical note
Funding Information:The authors wish to acknowledge the excellent assistant of research nurse, Ann-Christine Tysen-Bäckström. This study was supported by grants from the Regional agreement on medical training and clinical research (ALF) between Stockholm County Council and the Karolinska Institute, the Strategic Research Program in Neuroscience at Karolinska Institutet, the Swedish Research Council (project 05817), the Swedish Alzheimer Foundation , Gustaf V and Queen Victorias Freemason foundation , the Swedish Brain Power Consortium , Loo & Hans Osterman Foundation ; KI Foundations ; Olle Engkvist Byggmästare Foundation ; Åke Wibergs Foundation ; Åhlén-Foundation (Åhlén-stiftelsen); Gunvor and Josef Anérs Foundation ; Magnus Bergvalls Foundation ; Demens Foundation (Demensfonden); Gun and Bertil Stohnes Foundation ; Ragnhild & Einar Lundströms Foundation ; Foundation for Sigurd & Elsa Goljes Memory ; and Odd Fellow Foundation .
Publisher Copyright:
© 2015 The Alzheimer's Association.
Other keywords
- Acetyl cholinesterase
- Alzheimer's disease
- Amyloid-β
- Choline acetyltransferase
- MRI
- Nerve growth factor
- Nicotine receptors
- PET
- tau