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Evidence for Astrocytosis in Prodromal Alzheimer Disease Provided by (11)C-Deuterium-L-Deprenyl: A Multitracer PET Paradigm Combining (11)C-Pittsburgh Compound B and (18)F-FDG
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Radiology, Oncology and Radiation Science.
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2012 (English)In: Journal of Nuclear Medicine, ISSN 0161-5505, E-ISSN 1535-5667, Vol. 53, no 1, 37-46 p.Article in journal (Refereed) Published
Abstract [en]

Astrocytes colocalize with fibrillar amyloid-beta (A beta) plaques in postmortem Alzheimer disease (AD) brain tissue. It is therefore of great interest to develop a PET tracer for visualizing astrocytes in vivo, enabling the study of the regional distribution of both astrocytes and fibrillar A beta. A multitracer PET investigation was conducted for patients with mild cognitive impairment (MCI), patients with mild AD, and healthy controls using (11)C-deuterium-L-deprenyl ((11)C-DED) to measure monoamine oxidase B located in astrocytes. Along with (11)C-DED PET, (11)C-Pittsburgh compound B ((11)C-PIB; fibrillar A beta deposition), (18)F-FDG (glucose metabolism), T1 MRI, cerebrospinal fluid, and neuropsychologic data were acquired from the patients. Methods: (11)C-DED PET was performed in MCI patients (n = 8; mean age 6 SD, 62.6 +/- 7.5 y; mean Mini Mental State Examination, 27.5 +/- 2.1), AD patients (n = 7; mean age, 65.1 +/- 6.3 y; mean Mini Mental State Examination, 24.4 +/- 5.7), and healthy age-matched controls (n = 14; mean age, 64.7 +/- 3.6 y). A modified reference Patlak model, with cerebellar gray matter as a reference, was chosen for kinetic analysis of the (11)C-DED data. (11)C-DED data from 20 to 60 min were analyzed using a digital brain atlas. Mean regional (18)F-FDG uptake and (11)C-PIB retention were calculated for each patient, with cerebellar gray matter as a reference. Results: ANOVA analysis of the regional (11)C-DED binding data revealed a significant group effect in the bilateral frontal and bilateral parietal cortices related to increased binding in the MCI patients. All patients, except 3 with MCI, showed high (11)C-PIB retention. Increased (11)C-DED binding in most cortical and subcortical regions was observed in MCI (11)C-PIB+ patients relative to controls, MCI (11)C-PIB (negative) patients, and AD patients. No regional correlations were found between the 3 PET tracers. Conclusion: Increased (11)C-DED binding throughout the brain of the MCI (11)C-PIB+ patients potentially suggests that astrocytosis is an early phenomenon in AD development.

Place, publisher, year, edition, pages
2012. Vol. 53, no 1, 37-46 p.
Keyword [en]
Alzheimer disease, mild cognitive impairment, PET, astrocytosis, amyloid, monoamine oxidase B
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-168105DOI: 10.2967/jnumed.110.087031ISI: 000298660900018OAI: oai:DiVA.org:uu-168105DiVA: diva2:492067
Available from: 2012-02-07 Created: 2012-02-06 Last updated: 2015-10-20Bibliographically approved

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Wall, AndersEngler, HenryLångström, Bengt
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