目的通过16 S rDNA测序探究复方蜥蜴散凝胶对溃疡性结肠炎(UC)模型大鼠肠道菌群的影响。方法选取无特定病原体(SPF)级SD雄性大鼠,采取随机分组法,分为空白组、模型对照组、复方蜥蜴散凝胶高、中、低剂量组,柳氮磺吡啶组。采用TNBS-乙醇...目的通过16 S rDNA测序探究复方蜥蜴散凝胶对溃疡性结肠炎(UC)模型大鼠肠道菌群的影响。方法选取无特定病原体(SPF)级SD雄性大鼠,采取随机分组法,分为空白组、模型对照组、复方蜥蜴散凝胶高、中、低剂量组,柳氮磺吡啶组。采用TNBS-乙醇法制备大鼠UC模型,成模后进行结肠组织病理切片苏木素-伊红(HE)染色,取新鲜粪便提取DNA进行高通量16 S rDNA测序分析。结果与空白组比较,模型对照组结肠上皮细胞损伤、脱落,伴有腺体破坏、溃疡等病变,并可见大量的炎性细胞浸润;与模型对照组比较,复方蜥蜴散凝胶高、中、低剂量组和柳氮磺吡啶组结肠组织上皮细胞结构较清晰,炎性细胞浸润明显减少。测序结果显示:模型对照组肠道菌群多样性降低,经复方蜥蜴散凝胶和柳氮磺吡啶片治疗后,菌群多样性增加;菌群组成分析显示:与空白组比较,模型对照组中致病菌属丰度较高,治疗组有益菌占比增高。结论复方蜥蜴散凝胶可调节肠道菌群的多样性,通过增加有益菌,抑制致病菌进而起到治疗UC的作用。展开更多
Objective To study the influence of unilateral air flow rate change on the result of caloric test.Materials and Methods The unilateral weakness(UW) index was calculated when the air flow rate was set at 6 L /min in bo...Objective To study the influence of unilateral air flow rate change on the result of caloric test.Materials and Methods The unilateral weakness(UW) index was calculated when the air flow rate was set at 6 L /min in both ears(called symmetric stimulation) and again when it was set at 6 L /min in left ear and 3 L /min in the right ear(called asymmetric stimulation).Each individual subject was tested with both symmetrical and asymmetrical stimulations.Paired t test was used to examine the differences between results from symmetrical and asymmetrical stimulations.Result UW index decreased in response to asymmetrical stimulation.Conclusion Unilaterally decreased air flow rate can produce indices suggesting ipsilateral UW,which can be misleading.展开更多
文摘目的通过16 S rDNA测序探究复方蜥蜴散凝胶对溃疡性结肠炎(UC)模型大鼠肠道菌群的影响。方法选取无特定病原体(SPF)级SD雄性大鼠,采取随机分组法,分为空白组、模型对照组、复方蜥蜴散凝胶高、中、低剂量组,柳氮磺吡啶组。采用TNBS-乙醇法制备大鼠UC模型,成模后进行结肠组织病理切片苏木素-伊红(HE)染色,取新鲜粪便提取DNA进行高通量16 S rDNA测序分析。结果与空白组比较,模型对照组结肠上皮细胞损伤、脱落,伴有腺体破坏、溃疡等病变,并可见大量的炎性细胞浸润;与模型对照组比较,复方蜥蜴散凝胶高、中、低剂量组和柳氮磺吡啶组结肠组织上皮细胞结构较清晰,炎性细胞浸润明显减少。测序结果显示:模型对照组肠道菌群多样性降低,经复方蜥蜴散凝胶和柳氮磺吡啶片治疗后,菌群多样性增加;菌群组成分析显示:与空白组比较,模型对照组中致病菌属丰度较高,治疗组有益菌占比增高。结论复方蜥蜴散凝胶可调节肠道菌群的多样性,通过增加有益菌,抑制致病菌进而起到治疗UC的作用。
文摘Objective To study the influence of unilateral air flow rate change on the result of caloric test.Materials and Methods The unilateral weakness(UW) index was calculated when the air flow rate was set at 6 L /min in both ears(called symmetric stimulation) and again when it was set at 6 L /min in left ear and 3 L /min in the right ear(called asymmetric stimulation).Each individual subject was tested with both symmetrical and asymmetrical stimulations.Paired t test was used to examine the differences between results from symmetrical and asymmetrical stimulations.Result UW index decreased in response to asymmetrical stimulation.Conclusion Unilaterally decreased air flow rate can produce indices suggesting ipsilateral UW,which can be misleading.