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柿叶黄酮治疗实验性口腔溃疡的作用及其抗炎机制研究

2017-09-07张永丽王朔郝麦玲

中国实用医药 2017年20期
关键词:氧化应激

张永丽 王朔 郝麦玲

【摘要】 目的 探讨柿叶黄酮对大鼠口腔溃疡的治疗作用及其抗炎机制。方法 60只SD大鼠, 分为空白对照组、模型对照组、阳性对照组及柿叶黄酮20、40、80 mg/kg组, 每组10只。空白对照组不做处理, 其他各组建立口腔溃疡大鼠模型(醋酸法), 空白对照组、模型对照组给予灌胃等体积生理盐水, 阳性对照组给予灌胃西瓜霜, 柿叶黄酮组给予灌胃相应剂量柿叶黄酮。比较造模后第4、7天的溃瘍面积, 测定溃疡组织中肿瘤坏死因子-α(TNF-α)水平。结果 用药后4、7 d, 阳性对照组、柿叶黄酮40 mg/kg

组、柿叶黄酮80 mg/kg组大鼠的溃疡面积均小于模型对照组, 差异具有统计学意义 (P<0.05)。模型对照组(66.5±4.1)ng/L、阳性对照组(38.7±4.7)ng/L、柿叶黄酮组[(40.2±3.8)、(35.8±4.6)、(32.6±3.8)ng/L]大鼠溃疡组织内TNF-α水平高于空白对照组(27.8±3.2)ng/L, 差异具有统计学意义 (P<0.05)。阳性对照组、柿叶黄酮组大鼠溃疡组织内TNF-α水平低于模型对照组, 差异具有统计学意义 (P<0.05)。结论 柿叶黄酮对醋酸诱导的口腔溃疡有一定的治疗作用, 其机制可能与降低炎症反应有关。

【关键词】 柿叶黄酮;口腔溃疡;氧化应激;炎症

DOI:10.14163/j.cnki.11-5547/r.2017.20.103

【Abstract】 Objective To investigate the therapeutic effect of persimmon leaf flavonoid on oral ulcer in rats and its anti - inflammatory mechanism. Methods A total of 60 SD rats were divided into blank control group, model control group and positive control group, persimmon leaf flavonoid 20, 40 and 80 mg/kg group, with 10 rats in each group. The blank control group received no treatment, and the other groups established the models of rat oral ulcer (acetic acid). Blank control group, model control group was treated with intragastric administration of equal volume normal saline, the positive control group was treated with intragastric administration of watermelon frost, and persimmon leaf flavonoid group was treated with intragastric administration of corresponding dose persimmon leaf flavonoid. The ulcer area was compared after 4 and 7 days of modeling, and the level of tumor necrosis factor-α (TNF-α) in ulcer tissue was measured. Results After 4 and 7 d of medication, the positive control group, persimmon leaf flavonoid 40 and 80 mg/kg group had smaller ulcer area than model control group, and the difference had statistical significance (P<0.05). The model group (66.5±4.1) ng/L, positive control group (38.7±4.7) ng/L and persimmon leaf flavonoid group [(40.2±3.8), (35.8±4.6) and (32.6±3.8) ng/L] had higher TNF-α level in ulcer tissue than bland control group (27.8±3.2)ng/L, and their difference had statistical significance (P<0.05). The positive control group and persimmon leaf flavonoid group had lower TNF-α level in ulcer tissue than model control group, and the difference had statistical significance (P<0.05). Conclusion Persimmon leaf flavonoid have a certain therapeutic effect on acetic acid-induced oral ulcers, and its mechanism may be related to the reduction of inflammatory response.

【Key words】 Persimmon leaf flavonoid; Oral ulcer; Oxidative stress; Inflammationendprint

口腔溃疡(oral ulcer)是口腔黏膜病中最常见的疾病, 以复发性口腔溃疡(recurrent oral ulcer, ROU)为主, 一般人群中的发病率可达20%[1]。复发性口腔溃疡的临床特征有:致痛性、自限性和反复发作等。患者常由于疼痛而导致咀嚼、饮水、吞咽以及说话困难, 严重降低患者的生活质量[2]。复发性口腔溃疡的病因目前尚不明确, 由于复发性口腔溃疡病因和病机的复杂性, 导致臨床上缺乏特效治疗药物[3]。在复发性口腔溃疡的病因和病机中, 炎症反应对疾病的发生发展发挥着重要作用[4]。柿叶黄酮(persimmon leaf flavonoid, PLF)是柿叶中的主要有效成分。据明代《滇南本草》记载“经霜叶敷臁疮”, 臁疮即为小腿的一种慢性溃疡, 由此提示外用柿叶可用于治疗溃疡。现代药理学研究发现, 柿叶黄酮具有抗氧化、抗炎等多种药理作用[5]。基于上述理论基础, 作者通过建立口腔溃疡模型, 进行柿叶黄酮的药物干预, 观察柿叶黄酮的疗效并探讨其可能的作用机制。……

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