一个表面传送器家族传递了三子体分化信号
Samuel Dean1, Rosa Marchetti, Kiaran Kirk
1Centre for Immunity, Infection and Evolution, Institute for Immunology and Infection Research, School of Biological Sciences, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT, UK.
Nature
|May 16, 2009
概括
非洲睡眠病寄生虫使用环境线索来触发发育. 研究人员确定PAD蛋白对于感知这些信号和区分至关重要,作为关键的表面标记物.
科学领域:
- 寄生虫学的寄生虫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 微生物病原体利用环境线索来感染宿主和传播载体.
- 非洲睡眠病寄生虫对酸盐或cis-aconitate (CCA) 产生反应,以促进的生命周期发展.
- 寄生虫对CCA的过敏性是由低温引起的,模仿了飞食后的条件.
研究的目的:
- 为了确定三生体感知CCA的分化分子机制.
- 描述碳酸盐载体在感知环境信号中的作用.
- 寻找表面标记物来识别具有传输能力的三子体阶段.
主要方法:
- PAD (与差异化相关的蛋白质) 家族的识别和特征.
- 分析PAD蛋白表达和局部化在试管体中的分析.
- 通过RNA干扰 (RNAi) 消除PAD表达并评估CCA诱导的分化.
- 在寒冷冲击条件下评估寄生虫对CCA的反应.
主要成果:
- 碳酸盐转运体家族,PAD,被确定为CCA信号感知必不可少的.
- PAD蛋白质表达在具有传输能力的"形"试管体的表面.
- PAD表达是温度调节的,在低温时增加.
- 消除PAD表达减少了CCA诱导的分化,并消除了对寒冷冲击的过敏.
结论:
- PAD蛋白质的功能是作为CCA分化信号的分子传感器在试生体.
- PAD蛋白质代表了第一个能够在哺乳动物宿主中区分试管体传播阶段的已识别的表面标记物.
- 这一发现为寄生虫的发展和潜在的治疗点提供了洞察力.
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