CN101285037B - 一种高效裂解衣原体胞壁的方法 - Google Patents

一种高效裂解衣原体胞壁的方法 Download PDF

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CN101285037B
CN101285037B CN200710010932A CN200710010932A CN101285037B CN 101285037 B CN101285037 B CN 101285037B CN 200710010932 A CN200710010932 A CN 200710010932A CN 200710010932 A CN200710010932 A CN 200710010932A CN 101285037 B CN101285037 B CN 101285037B
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chlamydia
cell wall
sample
cracking
chlamydozoan
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CN101285037A (zh
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李天宪
吴勇敢
唐霜
李永东
陈绳亮
范兆军
张忠
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Wuhan Institute of Virology of CAS
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Abstract

一种高效裂解衣原体胞壁的方法,其特征在于:将衣原体样品放置-80℃,10~12h;取出后放入预冷-50℃左右的真空杯中,维持负压55Pa,2-3h。本发明方法充分释放胞内物质,并保持其完整生物学活性。提高了分子生物检测方法检测衣原体感染的灵敏度和准确性。

Description

一种高效裂解衣原体胞壁的方法
技术领域
本发明涉及微生物学领域,衣原体属(Chlamydia),不同衣原体种的衣原体胞壁的裂解技术,特别提供了一种高效裂解衣原体胞壁,充分释放胞内物质,并保持其完整生物学活性。提高了分子生物检测方法检测衣原体感染的灵敏度和准确性。
技术背景
衣原体易感人类、哺乳动物和禽类,引起肺炎、结膜炎、鼻炎和腹泻等,在家畜以流产和肺炎为特征,是一类十分重要的自然疫源性人兽共患疾病的病原体,严重地危害人畜禽类的健康,同时对我国公共卫生事业造成极大的影响。衣原体在生物学分类上属于衣原体属(Chlamydia),是一类在真核细胞内专营寄生生活的微生物。多呈球形或卵圆形大小不同的颗粒,直径0.2~1.5μm。衣原体内含有DNA和RNA两种类型的核酸;具有独特的发育周期,具有独立的酶系统,能分解葡萄糖释放CO2,有些还能合成叶酸盐,但缺乏产生代谢能量的作用,必须依靠宿主细胞的代谢中间产物,因而表现严格的细胞内寄生。衣原体具有粘肽组成的胞壁,常规采用裂解衣原体胞壁的方法是:置衣原体样品在-20~-40℃冷冻,取出于室温融解,再冷冻,如此反复冻融三次,其目的是导致衣原体胞壁破裂,释放胞内具生物学活性物质于介质中;或采用石炭酸、木瓜蛋白酶或加温60℃所破坏,此类方法会导致核蛋白质变性,丧失其生物学活性。
衣原体都可在6~8日龄鸡胚卵黄囊中繁殖,或采用HeLa细胞、猴肾细胞、人羊膜细胞培养增殖。当前,人、畜和禽类感染衣原体的诊断方法多采用设计不同的特异性引物,应用多聚酶链式反应(PCR)可特异性地诊断沙眼衣原体,肺炎衣原体和鹦鹉热衣原体感染,PCR检测方法具有敏感性高,特异性强的特点,现被广泛应用。但提供PCR检测衣原体的样品需将衣原体胞壁进行裂解,使胞内核酸释放于介质中作为检测样品。
发明内容
本发明的目的在于提供一种高效裂解衣原体胞壁的方法,采用本方法会使核蛋白质保持较高的生物学活性。
本发明提供了一种高效裂解衣原体胞壁的方法,其特征在于:将衣原体样品放置-80℃,10~12h;取出后放入预冷-50℃左右的真空杯中,维持负压55Pa,2-3h。
本发明高效裂解衣原体胞壁的方法中,所述衣原体样品最好来源于鸡胚卵黄囊膜或细胞培养物。
采用本发明方法针对不同种的衣原体样品进行处理后,采用多聚酶链式反应(PCR)实验结果显示,本方法可高效裂解衣原体胞壁,充分释放胞内核酸,提高核酸检测灵敏度和准确性,从而提高人、畜、禽类感染衣原体感染的诊断率。
具体实施方式:
具体操作步骤:鸡胚卵黄囊膜或细胞培养衣原体样品0.5~1毫升放置-80℃,10~12h(或过夜),取出后放入预冷-50℃左右的真空杯中,维持负压55Pa,2-3h后,使样品中衣原体胞壁高效裂解,胞内核酸物质充分释放于介质中,并保持其较高的生物学活性。
实施例1
采用本发明方法裂解衣原体样品:采集湖北省某县24户农户饲养猪63份粪便样品(份/个体),样品经无菌处理后,在无菌条件下接种6~8d龄鸡胚卵黄囊腔,37℃培养7天,收集3~6天死亡鸡胚的卵黄囊膜,用组织匀浆器制成卵黄囊膜匀浆。分别设计沙眼衣原体,肺炎衣原体和鹦鹉热衣原体的特异性引物,进行多聚酶链式反应(PCR)检测实验,结果如下:
Figure G2007100109324D00031
比较例1-1:
63份样品同上,采用常规采用裂解衣原体胞壁的方法是:置衣原体样品在-20~-40℃冷冻,取出再室温溶解,再冷冻,如此反复冻融三次。PCR检测方法同上,结果如下:
Figure G2007100109324D00032
比较例1-2
63份样品同上,采用常规采用裂解衣原体胞壁的方法是:加温60℃后,如上述方法作PCR检测,结果如下:
实施例2
采用本发明方法裂解衣原体样品:采集湖北省某县3农户饲养观赏鹦鹉鸟110份粪便样品(份/个体),样品经无菌处理后,在无菌条件下接种6~8d龄鸡胚卵黄囊腔,37℃培养7天,收集3~6天死亡鸡胚的卵黄囊膜,用组织匀浆器制成卵黄囊膜匀浆。分别设计沙眼衣原体,肺炎衣原体和鹦鹉热衣原体的特异性引物,进行多聚酶链式反应(PCR)检测实验,结果如下:
Figure G2007100109324D00042
比较例2-1:
110份样品同上,采用常规采用裂解衣原体胞壁的方法是:置衣原体样品在-20~-40℃冷冻,取出再室温溶解,再冷冻,如此反复冻融三次。PCR检测方法同上,结果如下:
Figure G2007100109324D00051
比较例2-2
110份样品同上,采用常规采用裂解衣原体胞壁的方法是:在样品中0.25%木瓜蛋白酶,置37℃,20分钟后,如上述方法作PCR检测,结果如下:

Claims (2)

1.一种高效裂解衣原体胞壁的方法,其特征在于:将衣原体样品放置-80℃,10~12h;取出后放入预冷-50℃左右的真空杯中,维持负压55Pa,2-3h。
2.按照权利要求1所述高效裂解衣原体胞壁的方法,其特征在于:所述衣原体样品来源于鸡胚卵黄囊膜或细胞培养物。
CN200710010932A 2007-04-12 2007-04-12 一种高效裂解衣原体胞壁的方法 Expired - Fee Related CN101285037B (zh)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1598431A1 (en) * 2003-02-27 2005-11-23 ARKRAY, Inc. Method of detecting chlamydia trachomatis and kit therefor
CN1873023A (zh) * 2006-04-14 2006-12-06 武汉大学 快速检测沙眼衣原体的荧光定量pcr试剂盒

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1598431A1 (en) * 2003-02-27 2005-11-23 ARKRAY, Inc. Method of detecting chlamydia trachomatis and kit therefor
CN1873023A (zh) * 2006-04-14 2006-12-06 武汉大学 快速检测沙眼衣原体的荧光定量pcr试剂盒

Non-Patent Citations (6)

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尚淑贤,王千秋.聚合酶链反应检测沙眼衣原体的研究进展.国外医学皮肤性病学分册28 3.2002,28(3),170-173. *
常海萍,薛玲莉.三种沙眼衣原体检测方法的对比评价.实用医技杂志12 10B.2005,12(10B),2892.
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