公共卫生 公共卫生
Letícia Cunha Pereira de Souza1, Ariadni Mesquita Peres1, Aline Cândida Ferreira1
1Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
在发育过程中高脂肪饮食会损害大鼠的突触可塑性和记忆力. 这些影响男女的变化持续到终身,突显了早期营养对大脑发育的影响.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 营养科学 营养科学
背景情况:
- 中枢神经系统 (CNS) 具有可塑性,特别是在发育过程中,允许适应,但增加对环境因素的敏感性.
- 关键发育时期的不良因素会影响中枢神经系统的发育和功能.
研究的目的:
- 研究高脂肪饮食 (HFD) 在雄性和雌性Wistar大鼠不同发育阶段对突触可塑性和记忆的长期影响.
- 在HFD暴露后分析关键突触蛋白 (synaptophysin,PSD-95) 和星系细胞标记物 (GFAP) 的变化.
主要方法:
- 从出生后的第21天开始,老鼠被食标准饮食 (SD) 或HFD,直到青少年 (59天),早期成年 (70天) 和成年 (110天) 阶段.
- 通过对象识别任务来评估短期记忆.
- hippocampal 的 synaptophysin,PSD-95 和 GFAP 的水平使用西式抹杀和 ELISA 来量化.
主要成果:
- 在成年后,HFD消费增加了热量摄入量和体重. 在青春期和早期成年期的男性中观察到记忆障碍 (减少歧视指数).
- 在男性中,海马突触素和PSD-95在青春期和成年期增加. 在成年后,GFAP水平会升高.
- 在女性中,在青春期内,突触素增加,在成年期 (110天) 观察到突触素,PSD-95和GFAP的增加.
结论:
- 在关键发育时期,高脂肪饮食暴露会改变两性中的星细胞标记物和突触可塑性.
- 这些变化,包括减少突触修剪,持续一生,表明早期营养对大脑发育和功能的长期影响.
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