边缘维生素A缺乏症加剧大鼠Aβ1-42注射后记忆力不足

Title:Marginal Vitamin A Deficiency Exacerbates Memory Deficits Following Aβ1-42 Injection in Rats

Volume: 14 Issue: 5

关键词: 阿尔茨海默病，淀粉样蛋白β，维生素A，边缘维生素A缺乏症，记忆障碍，视黄酸受体，ADAM10，IDE。

摘要: Background: Although clinical vitamin A deficiency (VAD), which is a public health problem developing throughout the world, has been well controlled, marginal vitamin A deficiency (MVAD) is far more prevalent, especially among pregnant women and preschool children in China. Increasing evidence suggests that VAD is involved in the pathogenesis of Alzheimer’s disease (AD). However, whether MVAD, beginning early in life, increases the risk of developing AD has yet to be determined.

Objective: The goal of this study was to investigate the long-term effects of MVAD on the pathogenesis of AD in rats.

Method: An MVAD model was generated from maternal MVAD rats and maintained with an MVAD diet after weaning. The males were bilaterally injected with aggregated amyloid β (Aβ)1–42 into the CA3 area of the hippocampus, and the AD-associated cognitive and neuropathological phenotypes were examined.

Results: We found that MVAD feeding significantly aggravated Aβ1-42-induced learning and memory deficits in the Morris water maze test. MVAD did not induce the mRNA expression of retinoic acid receptors (RARs), a disintegrin and metalloprotease 10 (ADAM10) or insulin-degrading enzyme (IDE) in Aβ1-42-injected rats. Moreover, RARα and RARγ mRNA were positively correlated with ADAM10 mRNA, whereas RARβ mRNA was positively correlated with IDE mRNA.

Conclusion: Our study suggests that MVAD beginning from the embryonic period perturbs the ADassociated genes, resulting in an enhanced risk of developing AD.

Cite this article as:

Marginal Vitamin A Deficiency Exacerbates Memory Deficits Following Aβ1-42 Injection in Rats, Current Alzheimer Research 2017; 14 (5) . https://dx.doi.org/10.2174/1567205013666161223162110

DOI https://dx.doi.org/10.2174/1567205013666161223162110	Print ISSN 1567-2050
Publisher Name Bentham Science Publisher	Online ISSN 1875-5828