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基于斑马鱼模型的知母皂苷BⅡ的血管保护作用及机制研究                                                                   Δ


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        杜孟姣 ,陈坚平 ,余嘉贤 ,梅文杰 ,余楚钦 ,王延东(1.广东药科大学/广东省药物新剂型重点实验室/广东
              1*
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                                3
                                        1
        省分子探针与生物医学影像工程中心/广东省局部精准药物递药制剂工程技术研究中心,广州 510006;2.中山
        大学附属第一医院药学部,广州 510080;3.暨南大学口腔医学院,广州 510632;4.中山大学中山眼科中心,广
        州 510060)
        中图分类号 R285.5         文献标志码 A           文章编号 1001-0408(2020)07-0811-05
        DOI  10.6039/j.issn.1001-0408.2020.07.09
        摘  要   目的:研究知母皂苷BⅡ(TB-Ⅱ)的血管保护作用,并探讨其可能的作用机制。方法:以养殖水为空白对照,考察100、200
        和400 μg/mL TB-Ⅱ培养受精后24 h(24 hpf)的正常斑马鱼胚胎48 h后对其肠下静脉血管(SIVs)的影响。采用酪氨酸激酶抑制剂
        PTK787(0.06 μg/mL)诱导斑马鱼肠下血管损伤模型;以0.1%二甲基亚砜、不加PTK787为空白对照,加PTK787、不加药物为模型
        对照,考察100、200、400 μg/mL TB-Ⅱ作用48 h后对血管损伤模型斑马鱼SIVs的影响,并采用实时荧光定量-聚合酶链式反应法检
        测斑马鱼体内fam样酪氨酸激酶1(Flt-l)、含激酶插入区受体(Kdr)、含激酶插入区受体l(Kdr-l)、血管内皮生长因子A(VEGF-A)
        以及肿瘤坏死因子α(TNF-α)、白细胞介素6(IL-6)mRNA的相对表达量。结果:100 μg/mL TB-Ⅱ作用后可显著增加正常斑马鱼
        的SIVs出芽数(P<0.05),200 μg/mL TB-Ⅱ作用后可显著增加正常斑马鱼的SIVs数(P<0.05)。与空白对照比较,PTK787作用后
        斑马鱼 SIVs 数显著减少(P<0.01),Flt-l、Kdr、Kdr-l、VEGF-A、TNF-α和 IL-6 mRNA 的相对表达量均显著降低(P<0.05 或 P<
        0.01);而经不同质量浓度的TB-Ⅱ作用后,血管损伤模型斑马鱼的SIVs数均不同程度地增加,Flt-l、Kdr、Kdr-l、VEGF-A、TNF-α和
        IL-6 mRNA相对表达量均不同程度地升高,除100 μg/mL TB-Ⅱ作用后斑马鱼SIVs数和Flt-l、TNF-α mRNA表达量以及400 μg/mL
        TB-Ⅱ作用后斑马鱼TNF-α mRNA表达量增加不显著外,其余指标差异均有统计学意义(P<0.05或P<0.01)。结论:TB-Ⅱ具有
        一定的促血管新生和修复受损血管的作用,其机制可能与上调血管内皮生长因子受体和促炎细胞因子的表达相关。
        关键词 知母皂苷BⅡ;血管保护;斑马鱼;肠下静脉血管;机制
        Study on Vascular Protection Effect and Mechanism of Timosaponin BⅡⅡ Based on Zebrafish Model
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        DU Mengjiao ,CHEN Jianping ,YU Jiaxian ,MEI Wenjie ,YU Chuqin ,WANG Yandong (1.Guangdong
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        Pharmaceutical University/Guangdong Provincial Key Laboratory of Advanced Drug Delivery Systems/
        Guangdong Provincial Molecular Probe and Biomedical Imaging Engineering Center/Guangdong Provincial
        Engineering Center of Topical Precise Drug Delivery System,Guangzhou 510006,China;2.Dept. of Pharmacy,
        the First Hospital Affiliated to Sun Yat-sen University,Guangzhou 510080,China;3.School of Stomatology,
        Jinan University, Guangzhou 510632, China;4.Zhongshan Ophthalmic Center, Sun Yat-sen University,
        Guangzhou 510060,China)

        ABSTRACT   OBJECTIVE:To study the protective effect of timosaponin BⅡ(TB-Ⅱ)on blood vessels and explore its possible
        mechanism. METHODS:Using aquaculture water as blank control,the effects of 100,200 and 400 μg/mL TB-Ⅱ treatment for 48
        h on the situation of subintestinal veins(SIVs)in normal zebrafish embryos 24 h after fertilization(24 hpf)were investigated.
        PTK787(0.06 μg/mL),a tyrosine kinase inhibitor,was used to induce the model of zebrafish intestinal vascular injury;using
        combing with 0.1% dimethyl sulfoxide but no PTK787 as blank control,combing with PTK787 but no drug as model control,the
        effects treatment of 100,200 and 400 μg/mL TB-Ⅱ for 48 h on the SIVs of zebrafish model with vascular injury were investigated.
        Relative expressions of fam-like tyrosine kinase 1(Flt-1),kinase insert domain containing receptor(Kdr),kinase insert domain
        containing receptor l(Kdr-l),vascular endothelial growth factor A(VEGF-A),tumor necrosis factor α(TNF-α)and interleukin 6
       (IL-6)mRNA were detected by RT-PCR. RESULTS:100 μg/mL TB-Ⅱ could significantly increase the sprouting vessel of normal
        zebrafish SIVs sprouting vessel number(P<0.05),and 200 μg/mL TB-Ⅱ could significantly increase SIVs number of normal
                                                           zebrafish (P<0.05). Compared with blank control, SIVs
           Δ 基金项目:广东省科学技术厅-广东省中医药科学院联合科研
                                                           number of zebrafish decreased significantly after PTK787
        项目(No.2016A020226038)
                                                           treatment (P<0.01),and the relative expressions of Flt-l,
           *硕士研究生。研究方向:新药研发与转化。E-mail:15225955073
                                                           Kdr, Kdr-l,VEGF-A,TNF-α and IL-6 mRNA were alse
        @163.com
           # 通信作者:高级工程师,硕士生导师。研究方向:新药研发与转                  decreased significantly (P<0.05 or P<0.01). After treated
        化。E-mail:pn333@163.com                             with different concentrations of TB- Ⅱ , SIVs number of


        中国药房    2020年第31卷第7期                                               China Pharmacy 2020 Vol. 31 No. 7  ·811  ·
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