摘要
目的:探讨罗红霉素通过缺氧诱导因子-1α(HIF-1α)对吸烟哮喘小鼠组蛋白去乙酰化酶(HDAC2)表达的影响。方法:SPF级雌性BALB/c小鼠40只,按随机数字表法随机平均分为正常对照组、哮喘组、吸烟哮喘组、罗红霉素干预4组。用卵白蛋白(OVA)致敏和激发的方法制备哮喘和吸烟哮喘模型,其中吸烟哮喘组在激发后置于自制熏箱内被动吸烟,对照组则用生理盐水代替OVA。分析支气管肺泡灌洗液(BALF)中的细胞分类计数;观察各组小鼠肺组织病理学变化;酶联免疫吸附(ELISA)法测定BALF中肿瘤坏死因子(TNF)-α水平,并采用Western blot测定各组小鼠肺组织中HIF-1α及HDAC2表达情况,并作相关性分析。结果:哮喘组和吸烟哮喘组嗜酸性粒细胞、中性粒细胞、淋巴细胞、巨噬细胞计数比例与正常对照组相比有统计学差异(P<0.01),吸烟哮喘组中性粒细胞计数比例显著高于哮喘组(P<0.01);罗红霉素干预组嗜酸性粒细胞、中性粒细胞、淋巴细胞计数比例与吸烟哮喘组相比有统计学差异(P<0.01)。哮喘组和吸烟哮喘组肺组织HIF-1α表达均显著高于正常对照组(0.67±0.03、0.85±0.07比0.42±0.03)且吸烟哮喘组显著高于哮喘组,罗红霉素干预组(0.52±0.05)低于吸烟哮喘组(均P<0.01);哮喘组和吸烟哮喘组肺组织HDAC2表达均显著低于正常对照组(2.04±0.12、1.74±0.06比3.93±0.08)(均P<0.01)且吸烟哮喘组显著低于哮喘组,罗红霉素干预组(2.53±0.09)高于吸烟哮喘组(均P<0.05)。吸烟哮喘组肺组织中HIF-1α与HDAC2的表达呈显著负相关(r=-0.879,P<0.01)。吸烟哮喘组BALF中TNF-α水平显著高于哮喘组、正常对照组(均P<0.01),罗红霉素干预组TNF-α水平显著低于吸烟哮喘组(P<0.01)。结论:罗红霉素可能通过抑制HIF-1α的表达上调吸烟哮喘小鼠HDAC2,从而改善气道炎症。
AIM： To explore the effect of Roxithromycin on expression of HDAC2 through HIF-1αin smoking asthma mice. METHODS： Forty female SPF BALB /c mice were divided randomly into 4groups： control group（ group C）, asthma group（ group A）,smoking asthma group（ group S） and Roxithromycin group（ group R）. To establish asthmatic and smoking asthma models with challenge of OVA and intervention with Roxithromycin. The different cells counts of bronchoalveolar fluid（ BALF）were analysed. The change of pathematology in different groups were observed. The level of TNF-α in BALF was detected by Sand-wich ELISA. The levels of HIF-1α and HDAC2 in lung homogenate were measured by Western blot. RESULTS： The ratios of eosinophil（ EOS）,neutrophile（ Neu）,lymphocyte（ Lym） to the total cell numbers of BALF in group A and group S were significantly higher than those in group C（ all P〈0. 01）,while in group S the ratio of Neu was higher than that in group A（ P〈0. 01）.The ratios of EOS,Neu and Lym in group R were significantly decreased than those in group S（ all P〈0. 01）. Western blot showed the expression of HIF-1α in lung homogenate of group A（ 0. 67 ±0. 03） and group S（ 0. 85 ± 0. 07） were higher than those in group C（ 0. 42 ± 0. 03）. Meantime the expression of HIF-1α in group S was higher than that of group A,while the expression of HIF-1α in group R was lower than that of group S（ all P〈0. 01）. The expressions of HDAC2 in group A and group S were significantly decreased than those in group C（ both P〈0. 01）,while the HDAC2 level of group S was lower than that of group A and its level in group R was higher than that in group S（ both P〈0. 05）. There were significantly negative correlations between the expressions of HIF-1α and HDAC2（ r =- 0. 879,P〈0. 01） in lung. The level of TNF-α in BALF of group S was significantly higher than those of group A and group C,but it in group R was decreased than that in group S（ all P〈0. 01）. CONCLUSION： Roxithromycin can decrease the airway inflammation of cigarette smoking asthma mice via increasing the expression of HDAC2 by down-regulating the expression of HIF-1α.
出处
《中国临床药理学与治疗学》
CAS
CSCD
2015年第6期606-610,共5页
Chinese Journal of Clinical Pharmacology and Therapeutics
基金
浙江省自然基金(Y2080466)
浙江省卫生厅课题(2009A144)
温州市科技局项目(Y20130351)
作者简介
徐慧，女，硕士，主治医师，主要从事哮喘发病机理研究。Tel：0577—88002714E—mail：xh_tomy@163．com
戴元荣，通信作者，男，硕士，教授，主任医师，主要从事哮喘发病机理研究。Tel：0577-88002714E—mail：daiyr@126．com
