南方医科大学学报 ›› 2025, Vol. 45 ›› Issue (8): 1589-1598.doi: 10.12122/j.issn.1673-4254.2025.08.03

• • 上一篇    

芪芎左归颗粒通过上调BDNF/TrkB通路提高衰老大鼠突触可塑性

王庆阁1(), 赵晓慧2, 何宇轩2, 刘飞祥3, 张运克3()   

  1. 1.河南省中医院/河南中医药大学第二附属医院人才库,郑州 450000
    2.河南中医药大学第一临床医学院,郑州 450000
    3.河南中医药大学第一附属医院脑病科,郑州 450000
  • 收稿日期:2025-03-01 出版日期:2025-08-20 发布日期:2025-09-05
  • 通讯作者: 张运克 E-mail:826955610@qq.com;henanzyk@126.com
  • 作者简介:王庆阁,主治医师,博士,E-mail: 826955610@qq.com
  • 基金资助:
    国家自然科学基金(81974564);国家自然科学基金(82104730);中原英才计划——科技创新领军人才项目(224200510027);河南省“双一流”创建学科中医学科学研究专项(HSRP-DFCTCM-2023-1-04);河南省中医药科学研究专项课题(2023ZY1030)

Qixiong Zuogui Granules enhance synaptic plasticity in aging rats by regulating the BDNF/TrkB signaling pathway

Qingge WANG1(), Xiaohui ZHAO2, Yuxuan HE2, Feixiang LIU3, Yunke ZHANG3()   

  1. 1.Talent Pool of Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou 450000, China
    2.First Clinical Medical College of Henan University of Chinese Medicine, Zhengzhou 450000, China
    3.Department of Encephalopathy, First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou 450000, China
  • Received:2025-03-01 Online:2025-08-20 Published:2025-09-05
  • Contact: Yunke ZHANG E-mail:826955610@qq.com;henanzyk@126.com
  • Supported by:
    National Natural Science Foundation of China(81974564)

摘要:

目的 探讨芪芎左归颗粒通过调控脑源性神经营养因子(BDNF)/酪氨酸激酶受体B(TrkB)通路对衰老大鼠突触可塑性的影响。 方法 将40只SD大鼠随机分为对照(Control)组、模型(Model)组、阳性药多奈哌齐(Don)组、中药芪芎左归颗粒(QXZG)组,10只/组。除对照组外,其余各组大鼠均连续腹腔注射D-半乳糖构建脑衰老大鼠模型;造模同时,Don组给予盐酸多奈哌齐混悬液(0.45 mg/kg灌胃)、QXZG组给予芪芎左归颗粒混悬液(7.97 g/kg灌胃),持续8周。干预结束后,评估各组大鼠的一般情况情况、行为学表现、血清中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活力及丙二醛(MDA)含量;HE及尼氏染色观察海马CA1区病理变化;免疫组化法检测细胞周期蛋白依赖性激酶抑制剂2A(CDKN2A/p16INK4a)蛋白阳性表达、免疫荧光法观察突触可塑性蛋白突触素(SYN)、生长相关蛋白43(GAP43)的阳性表达、蛋白免疫印迹检测BDNF/TrkB通路相关蛋白及突触后致密蛋白95(PSD95)的表达情况。 结果 与对照组相比,模型组大鼠出现牙齿、毛发变黄,体质量减轻等衰老表型并表现出学习记忆能力的损伤;血清SOD、GSH-Px活力降低,MDA含量升高(P<0.001);海马CA1区出现病理损伤,尼氏小体减少伴有p16蛋白升高(P<0.001);BDNF/TrkB通路蛋白BDNF、TrkB、CREB及突触可塑性蛋白SYN、GAP43、PSD95表达量降低(P<0.01)。与模型组相比,芪芎左归颗粒能够一定程度上抑制大鼠衰老表型的发生,提高学习记忆能力;改善海马CA1区病理损伤,降低氧化应激反应及p16蛋白表达(P<0.05);促进BDNF/TrkB通路蛋白及突触可塑性蛋白表达(P<0.05)。 结论 芪芎左归颗粒可能通过上调BDNF/TrkB信号通路相关蛋白的表达,提高衰老大鼠突触可塑性、降低体内氧化应激水平,发挥抗脑衰老及提高学习记忆能力的作用。

关键词: 脑衰老, BDNF/TrkB信号通路, 突触可塑性, 学习记忆, 芪芎左归颗粒

Abstract:

Objective To exple the mechanism of Qixiong Zuogui Granules (QXZG) for enhancing synaptic plasticity in aging rats. Method Forty SD rats were randomized into control group, aging model group, donepezil treatment group, and QXZG treatment group (n=10). Except for the control rats, all the rats were subjected to daily intraperitoneal injection of D-galactose for 8 consecutive weeks to induce brain aging, and donepezil hydrochloride and QXZG suspension were administered by gavage during modeling. After the interventions, the rats were evaluated for general conditions, behavioral changes, oxidative stress indicators, hippocampal pathologies, and expressions of the brain-derived neurotrophic factor (BDNF)/tyrosine kinase receptor B (TrkB) pathway, p16, and synaptic plasticity-associated proteins. Results The rats in the model group exhibited obvious aging phenotypes such as yellowing of the teeth and hair, body weight loss, and impaired learning and memory abilities, with decreased serum SOD and GSH-Px activities and increased serum MDA level. The rat models also showed obvious pathological changes, reduced Nissl bodies, and elevated p16 protein expression in the hippocampal CA1 region, with significantly decreased expression levels of BDNF, TrkB, CREB and synaptic plasticity proteins SYN, GAP43, and PSD95. Treatment with QXZG alleviated the aging phenotypes in the rat models, improved their learning and memory abilities and pathological changes in the hippocampal CA1 region, reduced oxidative stress and p16 protein expression, and promoted the expressions of the BDNF/TrkB pathway proteins and synaptic plasticity proteins. Conclusion QXZG enhances synaptic plasticity and reduces oxidative stress in aging rats possibly by upregulating the BDNF/TrkB signaling pathway proteins, thereby delaying brain aging and improving learning and memory abilities of the rats.

Key words: brain aging, BDNF/TrkB signaling pathway, synaptic plasticity, learning and memory, Qixiong Zuogui Granules