CN101164535B - 替普瑞酮的一种抗中暑用途 - Google Patents

替普瑞酮的一种抗中暑用途 Download PDF

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CN101164535B
CN101164535B CN2006101502176A CN200610150217A CN101164535B CN 101164535 B CN101164535 B CN 101164535B CN 2006101502176 A CN2006101502176 A CN 2006101502176A CN 200610150217 A CN200610150217 A CN 200610150217A CN 101164535 B CN101164535 B CN 101164535B
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teprenone
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CN101164535A (zh
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赵永岐
范明
鄢友娥
汪晖
王鲁明
刘淑红
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Institute of Basic Medical Sciences of AMMS
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Abstract

本发明涉及替普瑞酮(二拢牛儿基丙酮,geranylgeranylacetone,GGA)的一种抗中暑用途。替普瑞酮在经口给药的条件下,能够明显延缓热环境中大鼠中暑发生、延长中暑大鼠的生存时间。本发明的申请人将不同浓度的替普瑞酮灌胃给予成年大鼠,随后观察大鼠的中暑和大鼠的生存时间。发现预先灌胃一定浓度的替普瑞酮,能够明显延缓热环境中大鼠的中暑发生,延长中暑大鼠的生存时间,提高大鼠的抗中暑能力。通过本发明的方法,采用在适宜时间服用合适剂量的常用药物替普瑞酮,就能够提高大鼠对抗中暑的能力,为人体实验提供了有力的证据。若能推广到人体应用,将有较好的经济效益和社会效益。

Description

替普瑞酮的一种抗中暑用途
技术领域
本发明涉及替普瑞酮(二拢牛儿基丙酮)的一种抗中暑用途。替普瑞酮在经口给药的条件下,能够明显延缓热环境中大鼠中暑发生、延长中暑大鼠的生存时间。
背景技术
热环境损伤和中暑的预防措施是环境医学、军事医学、航天医学研究中的重要课题,到目前为止,仍然没有满意的预防中暑的药物问世。
替普瑞酮(teprenone),即二拢牛儿基丙酮(geranylgeranylacetone,GGA),是一种较为安全的HSP70诱导剂,临床常用于溃疡病的治疗。替普瑞酮通过诱导HSP70能够减轻化学物质引起的细胞毒作用(Bai,2002)及神经元损伤(Kikuchi,2002);它也通过诱导HSP70对缺血性肾衰竭(Suzuki,2005)、庆大霉素导致的前庭细胞损伤(Takumida,2005)、癫痫(Fujiki,2003;2004)、脑梗塞(Nagai,2005;Yasuda,2005;Nikaido,2004)等具有保护作用。脑缺血也是中暑的主要病理生理机制之一,替普瑞酮是否能通过诱导HSP70表达来对抗热损伤或中暑尚未见报道。
发明内容
本发明公开了替普瑞酮的一种抗中暑用途。替普瑞酮在经口给药的条件下,能够明显延缓热环境中大鼠中暑发生、延长中暑大鼠的生存时间。通过本发明的方法,采用在适宜时间服用合适剂量的常用药物,就能够提高大鼠等动物对抗热损伤的能力,为人体实验提供了有力的证据。若能推广到人体应用,将有较好的经济效益和社会效益。
本发明的申请人将不同浓度的替普瑞酮灌胃给予成年大鼠,随后观察大鼠的中暑和大鼠的生存时间。发现预先灌胃一定浓度的替普瑞酮,能够明显延缓热环境中大鼠中暑发生、延长中暑大鼠的生存时间,提高大鼠的抗中暑能力。
本发明的方法包括以下内容:
首先进行药品和动物的准备
替普瑞酮胶囊,溶解在阿拉伯胶中,室温保存。大鼠为合格试验动物用大鼠,雄性。使用超级恒温水浴和有机玻璃夹层水循环仓提供高温环境。
给药及热损伤
根据大鼠体重,灌胃给予替普瑞酮。给予替普瑞酮后1小时开始热损伤。(说明:1.替普瑞酮临床用于抗溃疡病的人体口服用量为每日3次,每次50mg。2.替普瑞酮口服对小鼠的LD50约为1500mg/kg。)
大鼠置于一定温度的高温环境中,监测大鼠肛温及血压变化,以平均动脉压从峰值下降25mmHg的时刻作为中暑开始,大鼠中暑后立即取出动物,放入室温环境中,观察动物存活状况。
生存时间的计算
从大鼠中暑后开始计时。记录大鼠在室温环境中的存活状况。以心率消失或血压为零作为大鼠死亡的标准。
以肛温到达42.1℃的时间及生存时间(精确到分钟)为定量考察指标,分析替普瑞酮组与对照组大鼠的差别。采用单因素k水平的方差分析,用F值判断统计学差异。
结论
通过本发明的方法,采用在适宜时间服用合适剂量的常用药物,就能够提高大鼠等动物对抗热损伤的能力,为人体实验提供了有力的证据。若能推广到人体应用,将有较好的经济效益和社会效益。
具体实施方式
实施例一  替普瑞酮对中暑大鼠的保护作用研究
1.材料和方法
替普瑞酮,日本Eisai公司生产,产品批号:041281,分装批号041281B,分子量330.55。为白色粉末。称去替普瑞酮50mg,加入2%阿拉伯胶至终体积5ml,充分溶解后室温保存。实验用大鼠为Wistar大鼠,体重180~220g,雄性,实验前一天对大鼠禁食过夜。
使用超级恒温水浴,连接有机玻璃夹层水循环仓,控制室温23~24℃,保持热循环仓实测温度40.5~41℃。将大鼠置入热仓中,监测大鼠肛温及血压变化,以平均动脉压从峰值下降25mmHg的时刻作为中暑开始,大鼠中暑后立即取出动物,放入室温环境(23~24℃)中,观察动物存活状况。以心率消失或血压为零作为大鼠死亡的标准。根据大鼠体重,灌胃给予替普瑞酮混悬液,灌胃体积为1ml/100g体重(10ml/kg体重)。给药终剂量为100mg/kg。给予替普瑞酮后1小时开始热损伤。从大鼠中暑后开始计时。记录大鼠在室温环境(23~24℃)中的存活状况。
以肛温到达42.1℃的时间及生存时间(精确到秒)为定量考察指标,分析替普瑞酮组与对照组大鼠的差别。采用单因素k水平的方差分析,用F值判断统计学差异。
2.结果
正常大鼠进入热仓后,大鼠肛温快速上升,到达42.1℃的时间约为19min,大鼠中暑后在室温环境中的存活时间约为14min;给予GGA预处理后大鼠肛温到达42.1℃的时间延长至25min,中暑后在室温环境中的存活时间延长至194min(见表1)。这些结果提示,GGA预处理能明显延长大鼠进入热仓后体温到达42.1℃的时间及中暑后在室温环境中的存活时间。
表1.替普瑞酮对大鼠热损伤后存活时间的影响
Figure GSB00000011176400031
与热损伤组相比,**P<0.01。

Claims (3)

1.替普瑞酮在制备增强人或动物对抗中暑能力的药物和保健品方面的应用。
2.替普瑞酮作为添加剂或辅料在制备增强人或动物对抗中暑能力的食品、饮料和保健品方面的应用。
3.根据权利要求1和2所述的应用,其中所说对抗中暑能力为对抗高热环境引起的中暑损伤的能力。
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