Effect of rosiglitazone on amyloid precursor protein processing and Aβ clearance in streptozotocin-induced rat model of Alzheimer’s disease | ||
| Iranian Journal of Basic Medical Sciences | ||
| مقاله 4، دوره 20، شماره 5، مرداد 2017، صفحه 474-480 اصل مقاله (1.16 M) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22038/ijbms.2017.8669 | ||
| نویسندگان | ||
| Li Wang1؛ Wei Liu2؛ Ying Fan1؛ Tingting Liu1؛ Chunjiang Yu* 3 | ||
| 1Department of Geriatrics, the Second Affiliated Hospital of the Harbin Medical University, Harbin 150081, China | ||
| 2Department of Neurology, Peking University Third Hospital, Beijing 100080, China | ||
| 3Department of Neurology, The Second Affiliated Hospital of the Harbin Medical University, Harbin 150081, China | ||
| چکیده | ||
| Objective(s): Increasing evidence suggests that Alzheimer’s disease (AD) is associated with diabetes. Rosiglitazone, a peroxisome proliferator-activated receptor γ (PPAR-γ) agonist and anti-diabetic agent, may improve symptoms of AD. However, the underlying therapeutic potential of it has not been fully elucidated. Materials and Methods: Rats were divided into four groups: control group, sham operated group, Streptozotocin (STZ) group, rosiglitazone (RGZ) group. Particularly, the STZ-induced rat model was established by intracerebroventricular injection (3 mg/kg) on the first and third day. The water maze behavioral test was performed to evaluate spatial reference learning and memory of the rats. Aβ1-40 and Aβ1-42 levels were measured by ELISA method. To determine APP-derived fragment, BACE1 and Aβ degrading enzymes levels, such as NEP and IDE, as well as Aβ transportation protein level, such as LRP1, RAGE, Abca1 and APOE , which were analyzed by Western blot. Immunohistochemistry was used to observe the change of Aβ1-40 and Aβ1-42 in hippocampus. Results: Chronic treatment with RGZ could reduce the Aβ level and improved spatial memory performance in STZ-induced rat model. However, RGZ modified the expression of specific transport proteins monitoring Aβ clearance, such as ATP-binding cassette transporter 1 (ABCA1), lipoprotein receptor-related protein 1 (LRP1), and the advanced glycation end product-specific receptor (RAGE) rather than change levels of Aβ degrading enzymes, such as IDE and NEP, nor affect APP processing. Conclusion: As a potential therapeutic strategy, rosiglitazone might exert anti-AD effect not by alteration of APP processing pathway and Aβ degradation directly, but through promotion of Aβ clearance indeed. | ||
| کلیدواژهها | ||
| Alzheimer’s disease؛ Amyloid precursor protein processing؛ β-amyloid peptide clearance؛ Peroxisome proliferator activated receptor γ | ||
| مراجع | ||
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