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High-Content Screening for Assessing Nanomaterial Toxicity.

Lingling Huo, Rui Chen, Xiaofei Shi

    Journal of Nanoscience and Nanotechnology
    |September 11, 2015
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    Summary

    High-content screening (HCS) effectively evaluated nanomaterial (NM) toxicity by assessing multiple cellular endpoints. This method provides a powerful approach for comprehensive nanosafety assessments.

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    Area of Science:

    • * Nanotoxicology
    • * Cell Biology
    • * High-Content Screening (HCS)

    Background:

    • * Rapid advancement of novel nanomaterials (NMs) necessitates efficient safety evaluation methods.
    • * Traditional toxicological endpoints may not fully capture complex NM interactions.
    • * High-content screening (HCS) offers a multi-parametric approach for nanosafety.

    Purpose of the Study:

    • * To evaluate the toxicity of eight different NMs using HCS.
    • * To assess multiple cellular endpoints including ROS, Ca2+ transient, mitochondrial membrane potential (MMP), and cellular pH.
    • * To demonstrate the efficacy of HCS in nanomaterial safety assessment.

    Main Methods:

    • * Utilized High-Content Screening (HCS) for multi-parametric image analysis.
    • * Incubated human bronchial epithelial (16HBE) cells with eight NMs for 24 hours.
    • * Measured reactive oxygen species (ROS) production, Ca2+ transient, MMP, and cellular pH.

    Main Results:

    • * All NMs significantly increased intracellular ROS levels.
    • * Ag and ZnO NMs decreased cell viability; Ag, ZnO, and CeO2 NMs decreased MMP; TiO2 NMs increased MMP.
    • * All NMs upregulated cellular lysosomal pH; no significant changes in Ca2+ levels were observed.
    • * HCS enabled simultaneous assessment of multiple cellular responses.

    Conclusions:

    • * HCS is an effective and powerful method for image-based toxicity evaluation of nanomaterials.
    • * Assessing multiple biological endpoints via HCS provides a more comprehensive understanding of NM safety.
    • * This approach avoids limitations associated with single-endpoint toxicological investigations.