1. Academic Validation
  2. Protective effects of BAY 73-6691, a selective inhibitor of phosphodiesterase 9, on amyloid-β peptides-induced oxidative stress in in-vivo and in-vitro models of Alzheimer's disease

Protective effects of BAY 73-6691, a selective inhibitor of phosphodiesterase 9, on amyloid-β peptides-induced oxidative stress in in-vivo and in-vitro models of Alzheimer's disease

  • Brain Res. 2016 Jul 1;1642:327-335. doi: 10.1016/j.brainres.2016.04.011.
Jian Li 1 Chun-Na Liu 2 Ning Wei 3 Xi-Dong Li 4 Yuan-Yuan Liu 4 Rui Yang 4 Yu-Jie Jia 4
Affiliations

Affiliations

  • 1 Department of Neurology, the First Affiliated Hospital of Liaoning Medical College, Jinzhou 121001, China. Electronic address: lijian070505@163.com.
  • 2 Department of Pharmacology, Liaoning Medical College, Jinzhou 121001, China.
  • 3 Division of Hematology-Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States; Cancer Therapeutics Program, University of Pittsburgh Cancer Institute, University of Pittsburgh, Pittsburgh, PA, United States.
  • 4 Department of Neurology, the First Affiliated Hospital of Liaoning Medical College, Jinzhou 121001, China.
Abstract

Alzheimer's disease (AD) is accompanied by enhanced oxidative stress and excess free radicals. Phosphodiesterase 9 inhibitors (PDE-9Is) showed memory improving effects in many pharmacological deficit models. However, whether BAY 73-6691 (a selective PDE-9I) may attenuate the oxidative stress during the development of AD is still unclear. For this purpose, primary cultures of SH-SY5Y cells were incubated with 20μM beta-amyloid25-35 (Aβ25-35), followed by exposure to different concentrations (50, 100, 150 and 200μg/ml) of BAY 73-6691. Furthermore, the antioxidant effect of BAY 73-6691 was evaluated in mice subjected to intracerebroventricular injection of Aβ25-35 (day 0) and treatment with BAY 73-6691 by intraperitoneal injection once daily (days 1-10). Our results elucidated that treatment with BAY 73-6691 attenuated the Aβ25-35-induced cytotoxicity and oxidative stress in SH-SY5Y cells. In vivo, BAY 73-6691 protected Aβ25-35-induced oxidative damage in hippocampus, associated with the attenuation of impairments in hippocampal neurons. Administration of BAY 73-6691 improved learning and memory in the Morris water maze test, and restored several hippocampal memory-associated proteins. Our study identified a neuroprotective role for BAY 73-6691 against Aβ25-35-induced oxidative stress in vivo and in vitro, harboring therapeutic potential for the treatment of AD by alleviating the impairments in spatial memory and hippocampal neurons.

Keywords

Beta-amyloid(25–35); Hippocampal neurogenesis; Oxidative stress; Phosphodiesterase 9 inhibitors; Spatial memory deficit.

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