Page 60 - 202016
P. 60

injection in other groups for 57 d. On the 58th day,the rats in administration groups were given the corresponding drugs
        intragastrically,and model group and normal control group were given constant volume of purified water,once a day,for
        consecutive 14 d. The general condition of rats was observed;abdominal wall withdrawal reaction(AWR)was adopted to evaluate
        the visceral sensitivity of rats in each group under 20,40,60,and 80 mmHg (1 mmHg=0.133 kPa)pressure;HE staining
        method was used to observe the colon pathological features of rats in each group. Western blotting assay was used to detect the
        protein expression of intestinal glial cells markers fibrillary acidic protein(GFAP),nerve growth factor(NGF)and its receptor
        TrkA in colon tissue. RESULTS:The mucosal layer of colon tissue in rats of model group was discontinuous,gland edema was
        observed and lymphocytes,neutrophils and eosinophils were scattered in the lamina propria. In Dajianzhong decoction low-does
        group,the mucosal layer of colon tissue was incomplete,some glands were slightly edematous,and a few lymphocytes,
        neutrophils in the lamina propria. The colonic mucosa epithelial structure was intact, glands arranged regularly, and no
        degenerative necrosis and inflammatory cells were observed in Dajianzhong decoction medium- and high-dose groups and
        pinaverium bromide group. Compared with normal control group,AWR scores under 20,40,and 60 mmHg pressure,relative
        protein expression of GFAR,NGF and TrkA were all increased significantly in model group and Dajianzhong decoction low-does
        groups (P<0.05 or P<0.01). Compared with model group,AWR scores under 20,and 40 mmHg pressure in Dajianzhong
        decoction medium- and high-dose groups and pinaverium bromide group,AWR scores under 60 mmHg pressure in Dajianzhong
        decoction high-dose group and pinaverium bromide group,relative protein expression of GFAP,NGF,TrkA in colon tissue in
        Dajianzhong decoction medium- and high-dose groups and pinaverium bromide group were all decreased significantly(P<0.05 or
        P<0.01). CONCLUSIONS:Dajianzhong decoction could improve the visceral pain of IBS model rats by inhibiting the activation
        of intestinal glial cells and reducing the expression of NGF and TrkA.
        KEYWORDS     Irritable bowel syndrome;Visceral pain;Intestinal glial cells;Nerve growth factor;Dajianzhong decoction;Rats

            肠易激综合征(Irritable bowel syndrome,IBS)是最          1.2  药品与试剂
        常见的功能性胃肠道疾病,其特征是反复出现腹痛或与                                大建中汤(贵州中医药大学第一附属医院药剂科提
                                [1]
        排便习惯改变相关的不适 。临床上西医治疗效果欠                             供,由蜀椒、干姜、人参、饴糖按质量比 1 ∶ 2 ∶ 1 ∶ 5 制备的
                                                      [3]
        佳 ,而中医经典方剂大建中汤对腹痛有很好的疗效 。                           水浸液,每 1 mL 相当于生药总量 1.5 g);匹维溴铵片
          [2]
        大建中汤出自《金要匮略》:“心胸中大寒痛,呕不能饮                          (美国Abbott Laboratories Limited公司,批号:H20160396,
        食,腹中寒上冲皮起,出见有头足,上下痛而不可触近,                           规格:50 mg/片);液态铝佐剂(美国 Pierce 公司,批号:
        大建中汤主之”。该方由干姜、人参、蜀椒、饴糖组成,有                          QD218415A);卵清白蛋白(OVA,美国 Sigma 公司,批
        健脾温中、散寒止痛之功。《肠易激综合征中医诊疗专家                           号:052K1275);注射用戊巴比妥钠(美国SCRC公司,批
        共识意见(2017)》指出,脾阳虚证是 IBS 的一个主要证                      号:WS20060401,规格:0.5 g);BCA 蛋白浓度测定试剂
          [4]
        型 ,与大建中汤主治功能相吻合。有研究发现,肠黏膜                           盒(上海碧云天生物技术有限公司,批号:P0009);预染
        中上调的神经生长因子(NGF)可以通过与肠内感觉神                           蛋白 Marker(美国 Thermo Fisher Scientific 公司,批号:
                                         [5]
        经纤维相互作用来介导内脏痛觉过敏 ,但具体机制尚                            26617);ECL 底物化学发光试剂盒(美国 Affinity 公司,
        未确定。研究表明,肠胶质细胞(EGC)似乎是NGF的主                         批号:KF001);聚偏二氟乙烯(PVDF)膜(美国 Hybond
               [6]
        要来源 ,且 EGC 结构和功能的改变可能与 IBS 的发病                      公司);聚丙烯酰胺凝胶电泳(PAGE)快速制备试剂盒
             [7]
        相关 。已有研究发现,大建中汤能够抑制腹痛大鼠脑                           (上海雅酶生物科技有限公司,批号:PG112);大鼠纤维
                       [8]
        内胶质细胞活化 。鉴于中枢神经系统(CNS)胶质细胞                          酸性蛋白(GFAP)、NGF、酪氨酸蛋白激酶A(TrkA)多克
                                     [9]
        与EGC形态和生理特征的相似性 ,本研究拟初步探讨                           隆抗体和生物素标记的山羊抗大鼠免疫球蛋白G(IgG)
        大建中汤是否可以通过抑制 EGC 活性进而改善 IBS 内                      (H + L)二 抗 [ 艾 博 抗(上 海)贸 易 有 限 公 司 ,批 号 :
        脏痛,为中医药治疗该病提供实验依据。                                  ab52918、ab76291、ab4648、ab6789];兔GAPDH多克隆抗
        1 材料                                                体(上海研谨生物科技有限公司,批号:GXP199629);无
        1.1 仪器                                              水乙醇(江苏海兴化工有限公司,批号:GB678-90);磷酸
            HS.Z68.5型电热蒸馏水器(武汉格莱莫检测设备有                      盐缓冲液(PBS,pH 7.2,北京中杉金桥生物技术有限公
        限公司);JY-JX5L 型垂直电泳槽、JY200E 型电泳仪(北                   司,批号:ZLI-9062);苏木精、伊红染液(武汉赛维尔生
        京君意东方电泳设备有限公司);TY-80A/TS 型水平脱                       物技术有限公司,批号:G1005-1、G1001);生理盐水(天
        色摇床(江苏科析仪器有限公司);80i型光学显微镜(日                         津药业焦作有限公司);其余试剂均为分析纯,水为蒸
        本Nikon公司);5200型化学发光凝胶成像仪(上海天能                       馏水。
        科技有限公司);Multiskan FC 型全功能酶标仪(美国                     1.3 动物
        Thermo Fisher Scientific公司);GL-21M型高速低温离心               SPF级SD大鼠,雌鼠16只、雄性8只,体质量150~
        机(湖南湘仪集团有限公司)。                                      170 g,由成都达硕生物科技有限公司提供,动物生产许


        ·1974 ·  China Pharmacy 2020 Vol. 31 No. 16                                 中国药房    2020年第31卷第16期
   55   56   57   58   59   60   61   62   63   64   65