Alterations of aqueous humor Aβ levels in Aβ-infused and transgenic mouse models of Alzheimer disease

Autoři: Da Eun Kwak aff001;  Taeho Ko aff001;  Han Seok Koh aff004;  Yong Woo Ji aff004;  Jisu Shin aff001;  Kyeonghwan Kim aff001;  Hye Yun Kim aff001;  Hyung-Keun Lee aff004;  YoungSoo Kim aff001
Působiště autorů: Department of Pharmacy, Yonsei University, Incheon, Republic of Korea aff001;  Yonsei Institute of Pharmaceutical Sciences, Yonsei University, Incheon, Republic of Korea aff002;  Industrial Pharmaceutical Sciences, Yonsei University, Incheon, Republic of Korea aff003;  Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Republic of Korea aff004;  Department of Ophthalmology, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea aff005;  Integrated Science and Engineering Division, Yonsei University, Incheon, Republic of Korea aff006
Vyšlo v časopise: PLoS ONE 15(1)
Kategorie: Research Article


Alzheimer’s disease (AD) is an ageing-related neurodegenerative disease characterized and diagnosed by deposition of insoluble amyloid-β (Aβ) plaques in the brain. The plaque accumulation in the brain directly affects reduced levels of Aβ in cerebrospinal fluid (CSF) and blood, as Aβ can freely transport the blood-brain barrier, and clinical investigations have suggested these two biofluids as promising samples for in vitro diagnosis. Given that the human eye structurally resembles the brain and Aβ accumulation often observed in the ocular region of AD patients, in this study, we examined aqueous humor Aβ as another possible surrogate biomarker. First, using the acute Aβ-infused AD mouse model by injecting Aβ to the CSF in intracerebroventricular region of normal ICR mice, we investigated whether Aβ concentration in the aqueous humor in AD models is positively correlated with the concentration in the CSF. Then, we examined the correlation of aqueous humor Aβ levels with increased plaque deposition in the brain and reduced Aβ levels in both CSF and blood in adult and aged 5XFAD Alzheimer transgenic mice. Collectively, the synthetic Aβ injected into CSF immediately migrate to the aqueous humor, however, the age-dependently reducing pattern of Aβ levels in CSF and blood was not observed in the aqueous humor.

Klíčová slova:

Alzheimer's disease – Biomarkers – Blood – Blood plasma – Cerebrospinal fluid – Eyes – Intravenous injections – Mouse models


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