Details

Autor(en) / Beteiligte

• Oh, Se Jong
• Lee, Namhun
• Nam, Kyung Rok
• Kang, Kyung Jun
• Han, Sang Jin
• Lee, Kyo Chul
• Lee, Yong Jin
• Choi, Jae Yong

Titel

Amyloid pathology induces dysfunction of systemic neurotransmission in aged APPswe/PS2 mice

Ist Teil von

• Frontiers in neuroscience, 2022-08, Vol.16, p.930613-930613

Ort / Verlag

Frontiers Media S.A

Erscheinungsjahr

2022

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• This study aimed to investigate how amyloid pathology affects the functional aspects of neurotransmitter systems in Alzheimer’s disease. APPswe/PS2 mice (21 months of age) and wild-type (WT) mice underwent positron emission tomography (PET) and magnetic resonance spectroscopy (MRS). First, we obtained 18 F-FDG and 18 F-florbetaben PET scans to evaluate neuronal integrity and amyloid pathology. Second, 18 F-FPEB and 18 F-FMZ PET data were acquired to assess the excitatory-inhibitory neurotransmission. Third, to monitor the dopamine system, 18 F-fallypride PET was performed. Amyloid PET imaging revealed that radioactivity was higher in the AD group than that in the WT group, which was validated by immunohistochemistry. In the cortical and limbic areas, the AD group showed a 25–27% decrease and 14–35% increase in the glutamatergic and GABAergic systems, respectively. The dopaminergic system in the AD group exhibited a 29% decrease in brain uptake compared with that in the WT group. A reduction in glutamate, N -acetylaspartate, and taurine levels was observed in the AD group using MRS. Our results suggest that dysfunction of the neurotransmitter system is associated with AD pathology. Among the systems, the GABAergic system was prominent, implying that the inhibitory neurotransmission system may be the most vulnerable to AD pathology.