中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (29): 4651-4657.doi: 10.12307/2022.850

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

二甲双胍对先兆子痫模型大鼠认知功能受损的影响

赵俊果1,陈  新1,蒋若涵1,郭  影1,高  波1,2   

  1. 1贵州医科大学附属医院影像科,贵州省贵阳市  550004;2贵州医科大学脑科学成像重点实验室,贵州省贵阳市  550001
  • 收稿日期:2021-08-14 接受日期:2021-10-12 出版日期:2022-10-18 发布日期:2022-03-28
  • 通讯作者: 高波,博士,教授,贵州医科大学附属医院影像科,贵州省贵阳市 550004
  • 作者简介:赵俊果,女,1987年生,河南省平顶山市人,贵州医科大学在读硕士,主要从事神经影像方面的研究。
  • 基金资助:
    国家自然科学基金面上项目(81871333);贵州省第七批“千人创新创业人才”(GZQ202007086);贵州省科技支撑计划(黔科[2020]4Y159);贵州医科大学脑科学成像重点实验室项目;项目负责人均为高波

Effects of metformin on cognitive dysfunction in preeclampsia rats

Zhao Junguo1, Chen Xin1, Jiang Ruohan1, Guo Ying1, Gao Bo1, 2   

  1. 1Department of Radiology, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China; 2Key Laboratory of Brain Imaging, Guizhou Medical University, Guiyang 550001, Guizhou Province, China
  • Received:2021-08-14 Accepted:2021-10-12 Online:2022-10-18 Published:2022-03-28
  • Contact: Gao Bo, MD, Professor, Department of Radiology, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China; Key Laboratory of Brain Imaging, Guizhou Medical University, Guiyang 550001, Guizhou Province, China
  • About author:Zhao Junguo, Master candidate, Department of Radiology, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China
  • Supported by:
    the National Natural Science Foundation of China (General Program), No. 81871333 (to GB); the Seventh-Batch Thousand Innovation and Enterprising Talent Project of Guizhou Province, No. GZQ202007086 (to GB); Guizhou Provincial Science and Technology Project, No. Qiankehe Support [2020]4Y159 (to GB); the Key Laboratory Construction Project of Guizhou Medical University (to GB)

摘要:

文题释义:
血管内皮生长因子家族:是一个以二硫键或非共价键联接的同源二聚体的糖蛋白,包括血管内皮生长因子、胎盘生长因子、血管内皮生长因子B、血管内皮生长因子C、血管内皮生长因子D及血管内皮生长因子E。它们都含有一个半胱氨酸结及6个不同的半胱氨酸同源区域。血管内皮生长因子为低氧诱导的生长因子,分子质量为 34-46 ku,其基因为单一基因,长约14 kb,由8个外显子及7个内含子构成。
腺苷酸活化蛋白激酶(AMPK):腺苷酸活化蛋白激酶家族属丝氨酸/苏氨酸蛋白激酶,其化学结构包括1个催化亚基(α亚基)和2个调节亚基(β、γ 亚基),其中γ亚基能结合2分子腺苷酸并具有正向协同效应,故对一磷酸腺苷(腺苷酸)的浓度变化非常敏感。腺苷酸活化蛋白激酶是细胞能量代谢的调节器,能感受细胞内腺苷酸浓度及腺苷酸/ATP比值的变化。 当细胞能量缺乏时,细胞内腺苷酸/ATP比值上升,导致腺苷酸活化蛋白激酶表达上调,进而通过一系列复杂而又精细的调节机制最终使能量代谢恢复平衡。

背景:先兆子痫是妊娠期特有的多器官、多系统功能障碍综合征,其致病学说目前无定论,内皮功能障碍是基础研究应用较多的一种机制,因此选用N-硝基-L-精氨酸甲基进行先兆子痫造模,并选用二甲双胍进行治疗。
目的:腹腔注射N-硝基-L-精氨酸甲基构建大鼠先兆子痫模型,探究二甲双胍对先兆子痫的疗效及其对大鼠认知功能的影响。
方法:将妊娠大鼠随机分为对照组、模型组和治疗组,对照组无特殊处理,模型组于妊娠中后期腹腔注射N-硝基-L-精氨酸甲基,治疗组于妊娠中后期腹腔注射同剂量N-硝基-L-精氨酸甲基及二甲双胍灌胃。妊娠中后期每日测量孕鼠体质量并计算药物剂量。妊娠第19 天、产后第10,30 天测量尾动脉血压并采血,进行可溶性内皮素和胎盘生长因子水平检测;妊娠第19天收集24 h尿进行白蛋白和肌酐定量检测;产后第10,30 天进行水迷宫实验,获得潜伏期、穿越平台次数和平台逗留时间。
结果与结论:①N-硝基-L-精氨酸甲基可成功建立先兆子痫模型,产生高血压、蛋白尿、宫内生长受限和内皮功能障碍表现;②二甲双胍可改善N-硝基-L-精氨酸甲基诱导产生的上述先兆子痫样表现;③N-硝基-L-精氨酸甲基诱导的先兆子痫大鼠产后第10,30 天均出现了认知功能受损的表现,二甲双胍治疗可一定程度上改善上述表现;④提示二甲双胍在先兆子痫的治疗和预防中有一定潜能,其作用机制有待进一步深入研究。 
缩略语:N-硝基-L-精氨酸甲基:NG-nitro-L-arginine methyl ester,L-NAME;可溶性内皮素:soluble endoglin,sEng;胎盘生长因子:placental growth factor,PGF

https://orcid.org/0000-0001-7465-3248 (赵俊果)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 先兆子痫, 二甲双胍, N-硝基-L-精氨酸甲基, 内皮功能障碍, 认知功能, 大鼠

Abstract: BACKGROUND: Preeclampsia is a unique syndrome of pregnancy involving multiple organ systems, with no final conclusion in its pathogenesis. Endothelial dysfunction is a mechanism that has been widely used in basic research. Therefore, NG-nitro-L-arginine methyl ester was used in this study for preeclampsia modeling, followed by treatment with metformin.
OBJECTIVE: To establish the model of preeclampsia in rats by intraperitoneal injection of NG-nitro-L-arginine methyl ester, and to explore the effects of metformin on preeclampsia and cognitive function in rats.
METHODS: Pregnant rats were randomly divided into control group, model group, and metformin group. The model group was intraperitoneally injected with NG-nitro-L-arginine methyl ester in the middle and late pregnancy, and the metformin group was intraperitoneally injected with the same dose of NG-nitro-L-arginine methyl ester and metformin in the middle and late pregnancy. Body mass of each pregnant rat was recorded and corresponding drug dose was calculated every day. Caudal artery blood pressure was measured, and soluble endothelin and placental growth factor levels were quantified on day 19 of gestation and on days 10 and 30 after delivery. On the 19th day of gestation, urine was collected for 24 hours for urinary albumin and creatinine quantification. The Morris water maze test was conducted on the 10th and 30th days after delivery to obtain the escape latency, number of platform crossings and the average time spent in the target site where the platform was located.
RESULTS AND CONCLUSION: Intraperitoneal injection of NG-nitro-L-arginine methyl ester could successfully establish the preeclampsia model in rats, resulting in hypertension, proteinuria and intrauterine growth restriction and endothelial dysfunction. Metformin could improve the preeclampsia-like performance induced by NG-nitro-L-arginine methyl ester. NG-nitro-L-arginine methyl ester-induced preeclampsia rats presented with impaired cognitive function 10 and 30 days after delivery, and metformin treatment could improve the above performance to a certain extent. Therefore, metformin has certain potential in the treatment and prevention of preeclampsia, and its mechanism of action needs to be further studied. 

Key words: preeclampsia, metformin, NG-nitro-L-arginine methyl ester, endothelial dysfunction, cognitive function, rat

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