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Effects of 4-hydroxy-2(3H)-benzoxazolone on Inflammatory and Apoptosis Signaling Pathways in Non-
        alcoholic Fatty Liver Disease Model Rats
        XU Wanpeng ,LIN Jun ,LIANG Yingqin ,ZHOU Huanfang ,ZHANG Hua ,HUANG Shizhen ,SUN Xuemei ,
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        WEI Xiugui ,WANG Hongyuan ,LIU Lin(1. School of Pharmacy,Guangxi Medical University,Guangxi
        530021;2. Neurosurgery Department,the Second People’s Hospital of Nanning,Guangxi 530031;3. Pharmacy
        Department,the First People’s Hospital of Nanning,Guangxi 530022)
        ABSTRACT    OBJECTIVE:To investigate the effects of 4-hydroxy-2(3H)-benzoxazolone on inflammatory and apoptosis
        signaling pathways in non-alcoholic fatty liver disease(NAFLD)model rats. METHODS:SD rats were divided into normal control
        group(10 rats)and modeling group(50 rats). Normal control group was given basic diet,and modeling group were given high-fat
        diet to induce NAFLD model. After modeling,the rats were divided into normal control group,model group,silibinin group
       (26.25 mg/kg),and 4-hydroxy-2(3H)-benzoxazolone high-dose,medium-dose and low-dose groups(100,50,25 mg/kg),with 8
        rats in each group. Normal control group and modeling group were given 0.6% CMC-Na intragastrically,and other groups were
        given relevant medicine 10 mL/kg intragastrically,once a day,for consecutive 4 weeks. After last medication,the serum levels of
        albumin(ALB),total protein(TP),globulin(GLB),ALB/GLB and free fatty acid(FFA)were detected;TUNEL staining was
        used to observe the apoptosis of rat hepatocytes. Western blot assay was used to detect the protein expression and phosphorylation
        level of inflammatory signaling pathway related proteins [Toll-like receptor 4(TLR4),myeloid differentiation factor 88(MyD88),
        nuclear factor-κ B p65 (NF-κ B p65),NF-κ B inhibitor protein (I κ B α)] in liver tissue as well as the expression of apoptosis
        signaling pathway related proteins [B cell lymphoma 2(Bcl-2),Bax,caspase-3]. RESULTS:Compared with model group,serum
        levels of TP(except for low-dose group),GLB and FFA,the protein expression of TLR4(except for low-dose group),MyD88
       (except for medium-dose group) and caspase-3,the phosphorylation levels of NF-κ B p65 and I κ B α protein were decreased
        significantly(P<0.05 or P<0.01). The ratio of ALB/GLB in serum and the ratio of Bcl-2/Bax in liver tissue were significantly
        increased (P<0.05 or P<0.01),and the phenomenon of hepatocyte apoptosis was improved. CONCLUSIONS:4-hydroxy-2
       (3H)-benzoxazolone can ameliorate NAFLD in rats,and the mechanism may be associated with inhibiting the expression TLR4/
        MyD88/NF-κB signaling pathway-related proteins and apoptosis-related proteins in liver tissues.
        KEYWORDS    4-hydroxy-2(3H)-benzoxazolone;Non-alcoholic fatty liver disease;Inflammation;Apoptosis;TLR4/MyD88/NF-
        κB signaling pathway;Rats

            随着经济的快速发展,人们生活节奏和饮食方式也                         酮、多糖和萜类等活性成分,具有一定的药用价值                     [11-12] 。
        发生了变化,发生肥胖的人数越来越多,而肥胖人群也                           本课题组前期从老鼠簕生物碱中分离出了单体化合物
        更容易患非酒精性脂肪性肝病(Nonalcoholic fatty liver             4-羟基-苯并噁唑-2-酮,经动物实验证明其对小鼠急、慢
        disease,NAFLD) [1-2] 。NAFLD 是由肝中脂质代谢失衡             性肝损伤和大鼠肝纤维化均有较好的改善作用                     [13-14] ,但
        引起、超过5%肝细胞发生脂肪变性的疾病,若不进行相                          其是否可改善 NAFLD 尚不明确。鉴于此,本研究拟通
        应治疗,NAFLD可发展为肝硬化或肝癌               [3-4] 。NAFLD的    过高脂饮食喂养大鼠以诱导建立 NAFLD 模型,以水飞
                                                                             [15]
        发病机制复杂并伴随其他代谢系统的疾病,目前在临床                           蓟宾为阳性对照药 ,研究 4-羟基-苯并噁唑-2-酮对
        上尚无特效治疗药物          [5-6] 。因此,积极开发新型的天然             NAFLD 模型大鼠炎症和凋亡信号通路的影响,以期为
        药物来缓解该疾病的发生发展,已成为当今肝病领域研                           该化合物的后续开发应用提供参考。
        究的热点。                                              1 材料
            Toll样受体4(TLR4)/髓样分化因子88(MyD88)/核               1.1 主要仪器
        因子κB(NF-κB)是典型的炎症信号通路。有研究指出,                           本研究所用主要仪器有:BS-2000 型全自动生化分
        抑制该通路活化可减少中性粒细胞等炎症介质的释放,                           析仪(深圳迈瑞生物医疗电子股份有限公司),Nano-
        从而改善肝损伤       [7-8] 。另有研究发现,促凋亡蛋白B细胞               drop2000 型 超 微 量 分 光 光 度 计(美 国 Thermo Fisher
        淋巴瘤 2(Bcl-2)相关 X 蛋白(Bax)、胱天蛋白酶 3(cas-              Scientific公司),SpectraMaxPlus384型酶标仪(香港分子
        pase-3)和抑凋亡蛋白 Bcl-2 在 NAFLD 进展中扮演着不                仪器有限公司),BX53 型显微镜(日本 Olympus 公司),
        可替代的角色      [9-10] 。由此推测,可通过抑制炎症和凋亡                Micro CL17R 型高速低温离心机(德国 Thermoiec 公
        这两条信号通路,来改善NAFLD。                                  司),OdysseyClx 型双色红外荧光成像仪(美国 Licor 公
            老鼠簕 Acanthus ilicifolius L.为爵床科老鼠簕属的           司),EM20-7-10 型电泳仪、SWB-20L-1 型恒温摇床(美
        灌木植物,常年生长在潮间带、亚热带、海岸带和热带地                          国 Major Science 公司),RM2255 型自动轮转切片机(德
        区,是红树林植物群落中的重要品种之一,主要含有黄                           国Leica公司)。


        中国药房    2021年第32卷第11期                                             China Pharmacy 2021 Vol. 32 No. 11  ·1299 ·
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