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Abstract Title:

Monosodium glutamate exposure during the neonatal period leads to cognitive deficits in adult Sprague-Dawley rats.

Abstract Source:

Neurosci Lett. 2018 Jun 6. Epub 2018 Jun 6. PMID: 29885453

Abstract Author(s):

Li Jin, Lin Li, Guo-Yong Li, Sha Liu, Dan-Ju Luo, Qiong Feng, Dong-Sheng Sun, Wei Wang, Jian-Yun Liu, Qun Wang, Dan Ke, Xi-Fei Yang, Gong-Ping Liu

Article Affiliation:

Li Jin

Abstract:

Epidemiological surveys show that 70-80% of patients with Alzheimer's disease (AD) have type 2 diabetes mellitus (T2DM) or show an abnormality of blood glucose levels. Therefore, an increasing number of evidence has suggested that diabetic hyperglycemia is tightly linked with the pathogenesis and progression of AD. In the present study, we replicated T2DM animal model via subcutaneous injection of newborn Sprague-Dawley (SD) rats with monosodium glutamate (MSG) during the neonatal period to investigate the effects and underlying mechanisms of hyperglycemia on cognitive ability. We found that neonatal MSG exposure induced hyperglycemia as well as Alzheimer-like learning and memory deficits with decreased dendritic spine density and hippocampal synaptic-related protein expression and increased phosphorylated tau levels in ~3-month-old SD rats. Our results suggested that hyperglycemia probably causes cognitive impairment and Alzheimer-like neuropathological changes, which provide the experimental data connecting T2DM and AD.

Study Type : Animal Study

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Sayer Ji
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