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PLOS NTD:弓形虫病——诱发癫痫病的风险因素

2015-02-23 赵洲 MedSci原创

弓形虫病是一种广泛传播的寄生虫感染疾病,由刚地弓形虫引发。在具有免疫能力的弓形虫病人体内,通常是无疾病症状的。癫痫病是一种主要的慢性脑神经失调障碍,影响全球大约7000万人的正常生活。现在,弓形虫病被怀疑是导致多种脑神经失调障碍的风险因素,包括癫痫病。为此,来自加蓬和法国的研究人员依据现有的文献资料进行了系统的综述和meta分析,从而估计由弓形虫病引起癫痫病的风险。系统性文献检索是分析多个英文或法



弓形虫病是一种广泛传播的寄生虫感染疾病,由刚地弓形虫引发。在具有免疫能力的弓形虫病人体内,通常是无疾病症状的。癫痫病是一种主要的慢性脑神经失调障碍,影响全球大约7000万人的正常生活。现在,弓形虫病被怀疑是导致多种脑神经失调障碍的风险因素,包括癫痫病。为此,来自加蓬和法国的研究人员依据现有的文献资料进行了系统的综述和meta分析,从而估计由弓形虫病引起癫痫病的风险。

系统性文献检索是分析多个英文或法文的数据库和期刊,如Pubmed、ScienceDirect等。检索条件无时间限制。检索是基于关键词和合适的组合。研究人员使用确定的和随机的影响模型以确定比值比,统计显著性设定为5.0%。共检索得到684篇文献。在所涵盖的研究中,共有受试者2888人,其中1280人患有癫痫病。尽管全世界人口的三分之一被弓形虫感染,有可能罹患癫痫病,但这方面的数据仍旧很少。这需要更多的相关研究来证明。亚洲是弓形虫病出现较少的地区,癫痫病在亚洲的发生也远少于其他地区。毒性和宿主对寄生虫的应答出现了明显差异。对致癫痫可能性的影响目前尚未研究。近期在撒哈拉以南非洲的一项研究表明寄生虫的组合对间接条件有额外的影响,比如弓形虫和盘尾丝虫导致癫痫病人抽搐、痉挛。弓形虫病被认为是癫痫病的一种风险因素。然而早些时候的meta分析和此次研究估算得到的风险程度不同(比值比分别为4.80和2.25,95% 置信区间分别为2.60-7.80和1.15-3.93)。

如果全球三分之一人口携带弓形虫,其中一部分人最终发展成为癫痫病患者,将有大量的人出于癫痫的危害中。有必要进行高质量的研究以确定弓形虫病和癫痫病二者之间是否有因果关系。目前仍有部分地区缺乏相关的研究数据。基于现有数据,携带有弓形虫的人患癫痫病的风险是普通人的2.2倍。相关的致病机理可能是多影响因素的(如寄生虫的寄居、神经功能的调整、钙离子的影响等等)。

原始出处:

Ngoungou EB, Bhalla D, Nzoghe A, Dardé M-L, Preux P-M (2015) Toxoplasmosis and Epilepsy— Systematic Review and Meta Analysis. PLoS Negl Trop Dis 9(2): e0003525. doi:10.1371/journal.pntd.0003525

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    2015-02-27 jueze2006

    pqnkyy.com/yuanyin/120.html 已转载 且标明出处

    0

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    2015-02-24 xjtumed09

    学习,学习!

    0

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