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中国临床药理学与治疗学 ›› 2005, Vol. 10 ›› Issue (6): 659-663.

• 研究原著 • 上一篇    下一篇

砒石对哮喘小鼠胞质型磷脂酶A2基因表达及白三烯C4的影响

宋泽庆, 陈衡华, 姚卫民, 梁标, 王晖1   

  1. 广东医学院呼吸疾病研究所,; 1药理学教研室, 湛江524021, 广东
  • 收稿日期:2005-05-10 修回日期:2005-06-21 出版日期:2005-06-26 发布日期:2020-11-12
  • 通讯作者: 宋泽庆, 男, 硕士, 副教授, 副主任医师, 硕士生导师, 主要从事支气管哮喘的免疫及治疗研究。Tel:0759-2387413 E-mail: songzeqing@yahoo.com
  • 基金资助:
    广东省中医药局课题(NO100023)

Effects of arsenolite on genic expression of cytoplastic Phospholipases A2 and leukotriene C4 in asthmatic mice

SONG Ze-qing, CHEN Hen-hui, YAO Wei-min, LIANG Biao, WANG Hui1   

  1. Institute of Respiratory Disease, Guangdong Medical College, Zhanjiang 524021, Guangdong, China; 1Deparrtment of Pharmacology, Guangdong Medical College, Zhanjiang 524021, Guangdong, China
  • Received:2005-05-10 Revised:2005-06-21 Online:2005-06-26 Published:2020-11-12

摘要: 目的: 探讨胞质型磷脂酶A2 (cPLA2) mRNA 表达、白三烯C4 (TLC4) 在哮喘发病中的作用及其相互关系, 以及砒石对哮喘的治疗作用。方法: 建立小鼠卵蛋白哮喘模型, 砒石灌胃给药, 用逆转录聚合酶链反应方法检测肺组织中cPLA2 mRNA 表达;ELISA 方法检测支气管肺泡灌洗液(BALF) 中LTC4 含量;微量滴定法测定BALF 中PLA2 活性。应用新航YP200型压力换能器及Medlab 生物信号采集系统检测小鼠肺功能Pmax 和T /T结果: 哮喘小鼠肺组织cPLA2 基因表达水平、BALF 中PLA2 活性、LTC4 水平均较对照组显著升高。0.625 、1.25 、2.50 及5.00mg·kg-1剂量的砒石可下调哮喘小鼠cPLA2mRNA 表达, 抑制哮喘小鼠BALF 中PLA2 活性和降低LTC4水平, 改善哮喘小鼠肺功能。结论: 支气管肺组织中cPLA2 基因表达上调、PLA2 活性和LTC4 水平增高在卵蛋白(OVA) 致敏小鼠哮喘发病中起着重要作用。砒石可显著抑制哮喘小鼠肺组织中cPLA2 基因的表达, 降低哮喘小鼠PLA2 活性和降低LTC4 水平,改善哮喘小鼠肺功能, 具有抗哮喘活性。

关键词: 哮喘, 砒石, 三氧化二砷, 白三烯C4, 胞质型磷脂酶A2

Abstract: AIM: To study the effects of arsenolite on the leukotriene C4 and the expression of cPLA2 mRNA in ovalbumin challenged asthmatic mice. METHODS: 56 mice were randomly divided into 7 groups. Establishing the ovalbumin sensitized asthmatic model, RT-PCR was employed to detect the expression of cPLA2 mRNA in the lung. The TLC4 and PLA2 in BALF were measured by ELISA. Expiration time /respiratory total time and expiration maximum pressure were detected. RESULTS: The expression of PLA2 mRNA in the lung and the TLC4, PLA2 activity in BALF in asthmatic group were significantly higher than those in normal group. After therapy with dexamethasone and different dosage of arsenolite (0.625, 1.25, 2.and 5.00 mg·kg-1), the expression of PLA2 mRNA and the TLC4, PLA2 activity were significantly lower than those in asthmatic group. Expiration time /respiratory total time and expiration maximum pressure in asthmatic group were significantly increased compared with normal group. Expiration time /respiratory total time and expiration maximum pressure of groups treated with 4 doses arsenolite were significantly decreased compared with asthmatic group. CONCLUSION: PLA2 mRNA expression increases in asthma group, and arsenolite can efficiently treat asthma. Its mechanism maybe partly relates to decreasing TLC4 in airway and the inhibition of PLA2 mRNA expression.

Key words: arsenolite, arsenic trioxide, asthma, cytoplastic phospholipases A2

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