Toxicity Testing of Effluent-Dominated Stream Using Predictive Molecular-Level Toxicity Signatures Based on High-Resolution Mass Spectrometry: A Case Study of the Lubbock Canyon Lake System
| Autor: | Haoqi Nina Zhao, Jordan Crago, Naveen Kumar, Olushola M. Awoyemi, Edward P. Kolodziej |
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| Rok vydání: | 2021 |
| Předmět: |
Canyon
geography geography.geographical_feature_category General Chemistry 010501 environmental sciences 01 natural sciences Mass Spectrometry Aquatic toxicology Aquatic organisms Lakes Molecular level Rivers Environmental chemistry Toxicity Zebrafish larvae Animals Environmental Chemistry Environmental science Effluent Water Pollutants Chemical Zebrafish 0105 earth and related environmental sciences Potential toxicity |
| Zdroj: | Environmental Science & Technology. 55:3070-3080 |
| ISSN: | 1520-5851 0013-936X |
| Popis: | Current aquatic toxicity assessments usually focus on targeted analyses coupled with toxicity testing to determine the impacts of complex mixtures on aquatic organisms. However, based on this approach alone, it is sometimes difficult to explain observed toxicity from the selected chemical analytes. Recent analytical advances such as high-resolution mass spectrometry (HRMS) can improve the characterizations of the chemical composition of complex mixtures, but the intensive labor required to produce confident identifications limits its utility in high-throughput screening. In the present study, we evaluated a rapid workflow to predict potential toxicity signatures of complex water samples based on high-throughput, tentative HRMS identifications derived from database matching, followed by identification of chemical-ligand interactions and pathway identification. We tested the workflow with water samples from the effluent-dominated Lubbock Canyon Lake System (LCLS). Results across all sites showed that predicted toxicity signatures had little variation when correcting for HRMS false-positive rates. The most common pathways across sites were gonadotropin-releasing hormone receptor and α-adrenergic receptor signaling. Alterations to the predicted pathways were successfully observed in larval zebrafish exposures to LCLS water samples. These results may allow researchers to better utilize rapid assessments of HRMS data for the assessment of adverse impacts on aquatic organisms. |
| Databáze: | OpenAIRE |
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