疟疾感染患者中Plasmodium falciparum独特的生理状态
J P Daily1, D Scanfeld, N Pochet
1Department of Immunology and Infectious Disease, [Harvard School of Public Health, 665 Huntington Avenue, Boston, Massachusetts 02115, USA.
Nature
|November 30, 2007
概括
疟疾寄生虫Plasmodium falciparum在体内表现出多样化的转录状态,揭示了新的生理多样性和功能性线粒体. 这些发现可能会影响对疾病严重程度和治疗策略的理解.
科学领域:
- 分子生物学分子生物学
- 寄生虫学的寄生虫学
- 基因组学就是基因组学.
背景情况:
- 疟疾寄生虫Plasmodium falciparum会导致各种各样的临床结果.
- 对疾病多样性的遗传和分子基础的了解很少.
- 在体外研究表明,寄生虫菌株之间的转录差异有限.
研究的目的:
- 直接从受感染患者身上调查Plasmodium falciparum的体内基因表达特征.
- 为了识别人类宿主中寄生虫的不同的转录状态.
- 探索观察到的转录状态的生理和代谢基础.
主要方法:
- 从患者血液样本中分析体内表达特征.
- 对寄生虫表达数据与酵母菌Saccharomyces cerevisiae compendium进行比较.
- 基于代谢和应激反应并行的转录状态的解释.
主要成果:
- 定义了Plasmodium falciparum的三个不同的体内转录状态.
- 确定了类似于活跃生长 (糖溶解),饥饿反应和环境压力的状态.
- 观察到的状态以前没有在体外表征,包括证据的功能性线粒体在无性阶段的寄生虫.
结论:
- 在体内,Plasmodium falciparum表现出显著的,以前未被识别的生理多样性.
- 已识别的转录状态可能与疾病表现相关.
- 需要进一步的体内和体外研究来将寄生虫变异与疾病结果和治疗疗效联系起来.
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