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首页> 外文期刊>journal of biomedical optics >Dynamic analysis of pathogen-infected host cells using quantitative phase microscopy
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Dynamic analysis of pathogen-infected host cells using quantitative phase microscopy

机译:定量相显微镜动态分析病原体感染的宿主细胞

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We present the real-time quantitative analysis of Vibrio vulnificus–infected host cells using quantitativenphase microscopy (QPM) based on interferometric techniques. This provides the ability to retrieve the phase ornoptical path-length distribution over the cell with nanometer path-length sensitivity from a single interferogramnimage. We have used QPM to study dynamic cell morphologic changes and to noninvasively quantify the cellnvolumes of rat basophilic leukemia RBL-2H3 cells infected with V. vulnificus strains: wild type (MO6–24/O) andnRtxA1 toxinmutant (CMM770).During the process of V. vulnificus infection in RBL-2H3 cells, the dynamic changesnof quantitative phase images, cell volumes, and areas were observed in real time using QPM. In contrast, dramaticnchanges were not detected in RBL-2H3 cells infected with the noncytotoxic RtxA1 toxin mutant. The resultsnshowed good correlation between QPM analysis and biochemical assays, such as lactate dehydrogenase assay ornβ-hexosaminidase release assay. We suggest that QPM is a powerful quantitative method to study the dynamicnprocess of host cells infected with pathogens in a noninvasive manner.
机译:我们使用基于干涉技术的定量相显微镜(QPM),对外阴弧菌感染的宿主细胞进行了实时定量分析。这提供了从单个干涉图图像中以纳米路径长度灵敏度来检索单元上的相位正交路径长度分布的能力。我们已经使用QPM研究动态细胞形态变化并无创地定量感染了V. vulnificus菌株的大鼠嗜碱性白血病RBL-2H3细胞的细胞量:野生型(MO6-24 / O)和nRtxA1毒素突变体(CMM770)。使用QPM实时观察RBL-2H3细胞中的V. vulnicus感染,定量相图像,细胞体积和面积的动态变化。相反,在感染了非细胞毒性RtxA1毒素突变体的RBL-2H3细胞中未检测到剧烈变化。结果表明,QPM分析与生化测定(如乳酸脱氢酶测定或β-己糖胺酶释放测定)之间具有良好的相关性。我们建议QPM是一种以无创方式研究感染病原体的宿主细胞动态过程的强大定量方法。

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