目的:研究龙麻金宁方对热哮大鼠气道重塑及其肺组织中蛋白激酶B(PKBm RNA)、成纤维细胞α-平滑肌肌动蛋白(α-SMA m RNA)、血小板衍生因子(PDGF)、I、III胶原蛋白表达水平的影响。方法:雄性SD大鼠,70只,随机分成以下7组:正常组、模型组...目的:研究龙麻金宁方对热哮大鼠气道重塑及其肺组织中蛋白激酶B(PKBm RNA)、成纤维细胞α-平滑肌肌动蛋白(α-SMA m RNA)、血小板衍生因子(PDGF)、I、III胶原蛋白表达水平的影响。方法:雄性SD大鼠,70只,随机分成以下7组:正常组、模型组、地塞米松组、麻杏石甘汤组以及龙麻金宁高、中、低剂量组,每组10只。在第1天和第8天,以10%卵蛋白腹腔注射致敏及细菌脂多糖(LPS)滴鼻制热(终浓度400μg·m L-1)复制大鼠热哮模型。第15天开始1%卵蛋白雾化激发,连续7 d,第21天模型复制成功,开始治疗。正常组、模型组每天给予等量蒸馏水灌服,地塞米松组、麻杏石甘汤组、龙麻金宁高、中、低剂量组按人体与大鼠体表面积换算比折算剂量灌胃,灌胃4周后解剖大鼠并取出肺组织。采用HE染色法观察肺组织的病理形态学改变;采用免疫组化法观察肺组织的中、小气道I、III胶原蛋白的阳性表达;采用酶联免疫吸附反应定量肺组织的PDGF含量;采用逆转录-聚合酶链反应以半定量测定PKBm RNA、α-SMA m RNA的表达丰度。结果:与正常组比较,模型组发生明显肺组织炎症反应和气道重塑现象,α-SMAm RNA、PKBm RNA、PDGF、I、III胶原表达水平显著升高(P<0.01);龙麻金宁高、中、低剂量治疗组与模型组比较,α-SMAm RNA、PKBm RNA、PDGF、I、III胶原表达水平显著降低(P<0.01)。结论:龙麻金宁明显减轻热哮大鼠气道炎症反应,抑制热哮大鼠肺组织中α-SMA m RNA、PKBm RNA、PDGF、I、III胶原的表达,延缓气道重塑而治疗哮喘。展开更多
To understand the effects of the chemical and physical properties of plant leaves on food choice in Rhinopithecus bieti,we collected mature leaves of nine food and five non-food plant species at the southernmost part ...To understand the effects of the chemical and physical properties of plant leaves on food choice in Rhinopithecus bieti,we collected mature leaves of nine food and five non-food plant species at the southernmost part of the species's range.Chemical properties such as fat, ash, crude protein (CP), total phenolics (TP), and fiber content including neutral detergent fiber(NDF), acid detergent fiber (ADF), lignin, celluloses and hemicelluloses, and physical toughness were measured. R. bieti tendedto choose leaves with lower fiber content, higher ash, a higher ratio of CP/ADF, and lower toughness. No difference was foundfor fat, crude protein, total phenolics, hemicelluloses and lignin between food and non-food leaves. Even though the ratio ofCP/ADF is generally regarded as a good indicator for colobine food choice, the difference in the ratio of CP/ADF between foodand non-food leaves was only the result of differences in ADF. Since positive correlations were found between ADF and toughnessfrom all leaves (both food and non-food species), and toughness of leaves was likely easier for R. bieti to sense than fibercontent via mastication, the toughness of leaves may function as a predictor of food choice in this species.展开更多
基金supported by TNC "Conservation Ecology of Yunnan Snub-nosed Monkey (Rhinopithecus bieti) at Two Geographic Extremes of Species Range"PhD Funding from Dali University,National Natural Science Foundation of China (No.30770308,30960084,30960085)+1 种基金Key Laboratory of Forest Disaster Warning and Control in Yunnan Province (ZK09A313)Key Subject of Wildlife Conservation and Utilization in Yunnan Province (XKZ200904)
文摘To understand the effects of the chemical and physical properties of plant leaves on food choice in Rhinopithecus bieti,we collected mature leaves of nine food and five non-food plant species at the southernmost part of the species's range.Chemical properties such as fat, ash, crude protein (CP), total phenolics (TP), and fiber content including neutral detergent fiber(NDF), acid detergent fiber (ADF), lignin, celluloses and hemicelluloses, and physical toughness were measured. R. bieti tendedto choose leaves with lower fiber content, higher ash, a higher ratio of CP/ADF, and lower toughness. No difference was foundfor fat, crude protein, total phenolics, hemicelluloses and lignin between food and non-food leaves. Even though the ratio ofCP/ADF is generally regarded as a good indicator for colobine food choice, the difference in the ratio of CP/ADF between foodand non-food leaves was only the result of differences in ADF. Since positive correlations were found between ADF and toughnessfrom all leaves (both food and non-food species), and toughness of leaves was likely easier for R. bieti to sense than fibercontent via mastication, the toughness of leaves may function as a predictor of food choice in this species.
