Neuroprotection elicited by taurine in sporadic Alzheimer-like disease: benefits on memory and control of neuroinflammation in the hippocampus of rats.

IF 3.5 2区 生物学 Q3 CELL BIOLOGY
Molecular and Cellular Biochemistry Pub Date : 2024-10-01 Epub Date: 2023-10-24 DOI:10.1007/s11010-023-04872-3
Fernanda Huf, Jessié Martins Gutierres, Gabrielle N da Silva, Adriana M Zago, Luiz Felipe C Koenig, Marilda C Fernandes
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Abstract

This study aimed to analyze whether taurine has a nootropic effect on short-term and long-term memory in a model of sporadic dementia of the Alzheimer's type (SDAT). Moreover, we evaluated the immunoreactivity and insulin receptor (IR) distribution and markers for neurons and glial cells in the hippocampus of rats with SDAT and treated with taurine. For this, Male Wistar rats received STZ (ICV, 3 mg/kg, bilateral, 5ul per site, aCFS vehicle) and were treated with taurine (100 mg/kg orally, 1 time per day, saline vehicle) for 25 days. The animals were divided into 4 groups: vehicle (VE), taurine (TAU), ICV-STZ (STZ) and ICV-STZ plus taurine (STZ + TAU). At the end of taurine treatment, short- and long-term memory were assessed by performance on object recognition and Y-maze tasks. Insulin receptor (IR) was evaluated by immunoperoxidase while mature neurons (NeuN), astrocytes (GFAP, S100B, SOX9), and microglia (Iba-1) were evaluated by immunofluorescence. STZ induced worse spatial and recognition memory (INDEX) in YM and ORT tasks. Taurine protected against STZ-induced memory impairment. SDAT reduced the population of mature neurons as well as increased astrocytic and microglial reactivity, and taurine protected against these STZ-induced effects, mainly in the CA1 region of the hippocampus. Taurine increases IR expression in the hippocampus, and protects against the reduction in the density of this receptor in CA1 induced by STZ. In conclusion, these findings demonstrate that taurine is able to enhance memory, up-regulates IR in the hippocampus, protects the neuron population, and reduces the astrogliosis found in SDAT.

Abstract Image

牛磺酸对散发性阿尔茨海默病的神经保护作用:对大鼠记忆和控制海马神经炎症的益处。
本研究旨在分析牛磺酸是否对阿尔茨海默型散发性痴呆(SDAT)模型的短期和长期记忆具有促神经作用。此外,我们还评估了SDAT和牛磺酸处理大鼠海马神经元和神经胶质细胞的免疫反应性、胰岛素受体(IR)分布和标志物。为此,雄性Wistar大鼠接受STZ(ICV,3 mg/kg,双侧,每个部位5ul,aCFS载体),并用牛磺酸(口服100 mg/kg,每天1次,生理盐水载体)治疗25天。将动物分为4组:赋形剂(VE)、牛磺酸(TAU)、ICV-STZ(STZ)和ICV-STZ+牛磺酸(STZ + τ)。牛磺酸治疗结束时,通过物体识别和Y迷宫任务的表现来评估短期和长期记忆。胰岛素受体(IR)通过免疫过氧化物酶评估,而成熟神经元(NeuN)、星形胶质细胞(GFAP、S100B、SOX9)和小胶质细胞(Iba-1)通过免疫荧光评估。STZ在YM和ORT任务中导致较差的空间记忆和识别记忆(INDEX)。牛磺酸对STZ诱导的记忆损伤具有保护作用。SDAT减少了成熟神经元的数量,增加了星形胶质细胞和小胶质细胞的反应性,牛磺酸主要在海马CA1区保护这些STZ诱导的作用。牛磺酸增加海马中IR的表达,并防止STZ诱导的CA1中该受体密度的降低。总之,这些发现表明牛磺酸能够增强记忆,上调海马中的IR,保护神经元群,并减少SDAT中发现的星形胶质细胞增生。
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来源期刊
Molecular and Cellular Biochemistry
Molecular and Cellular Biochemistry 生物-细胞生物学
CiteScore
8.30
自引率
2.30%
发文量
293
审稿时长
1.7 months
期刊介绍: Molecular and Cellular Biochemistry: An International Journal for Chemical Biology in Health and Disease publishes original research papers and short communications in all areas of the biochemical sciences, emphasizing novel findings relevant to the biochemical basis of cellular function and disease processes, as well as the mechanics of action of hormones and chemical agents. Coverage includes membrane transport, receptor mechanism, immune response, secretory processes, and cytoskeletal function, as well as biochemical structure-function relationships in the cell. In addition to the reports of original research, the journal publishes state of the art reviews. Specific subjects covered by Molecular and Cellular Biochemistry include cellular metabolism, cellular pathophysiology, enzymology, ion transport, lipid biochemistry, membrane biochemistry, molecular biology, nuclear structure and function, and protein chemistry.
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