eSTAR

Emerging Systems Toxicology for the Assessment of Risk (eSTAR) Committee

Mission Statement

The mission of HESI’s Emerging Systems Toxicology for the Assessment of Risk (eSTAR) Committee is to develop and deliver innovative systems toxicology approaches for risk assessment. The committee aims to catalyze adoption of new translational and predictive tools that guide decision-making based on mechanistic understanding of toxicological response.

Cell Painting and Error Corrected Sequencing Call for Stakeholders

The Emerging Systems Toxicology for the Assessment of Risk (eSTAR) Committee is exploring two new projects, one relating to cell painting for safety assessment and the other exploring the use of error corrected sequencing to predict tumorigenicity from non-genotoxic carcinogens. Both groups are looking for additional stakeholders.

Interested in finding out more? Please contact Saddef Haq (shaq@hesiglobal.org)

Working Groups

  • Use of Transcriptomic Point of Departure (POD) for Chemical Risk Assessments

    This group is exploring the use of transcriptomic point of departure for chemical risk assessment. A state of the science manuscript is in preparation.

  • Carcinogenomics Project

    Three active working groups have compiled, curated, and begun analysis of transcriptomic, toxicologic, and pathologic data to identify short-term transcriptional signatures. These signatures will inform molecular mechanisms underlying pathogenesis of histologic risk factors of neoplasia observed in 90-day studies or chronic 6-month rat toxicology studies and that will inform the value/need to conduct a 2-year rat carcinogenicity study. Novel data housing/analysis partnerships were formed with the NIEHS Chemical Effects in Biological Systems (CEBS) data repository and Lhasa.

  • miRNA Biomarkers Project

    An miRNA best practices manuscript was submitted in August 2020. A second paper on renal miRNA biomarkers will be submitted by October 2020. A new experimental and/ or methodology project to reduce hurdles to the use of miRNAs for translational safety assessment and in biological discovery efforts is in development.

  • TGx-DDI Project

    Multiple revisions of the Qualification Plan for the TGx-DDI biomarker were submitted to FDA during 2020, including an added multi-site validation study design per the FDA. The plan is under FDA review; if accepted, experimental work and full qualification will proceed in 2021.

    Learn more about the use of the TGx-DDI transcriptomic biomarker for the genotoxicity assessment of data-poor chemicals here (poster presented at the 2021 EMGS Virtual Annual Meeting by Anne-Marie Fortin, University of Ottawa).

HESI Staff

Leadership Team

  • Brian Chorley, PhD

    US Environmental Protection Agency

  • Deidre Dalmas Wilk, PhD

    GlaxoSmithKline

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Committee Publications

Filter

Organocatalyst treatment improves variant calling and mutant detection in archival clinical samples

Nature Scientific Reports, 2022

Leah C. Wehmas, Charles E. Wood, Ping Guan, ...

Most archived biological tissue samples are preserved in formalin. Formalin fixation of biological samples damages nucleic acids and limits their use in future genomic analyses. Improved tools are needed to increase nucleic acid yield, reduce artifacts, and facilitate analysis and interpretation of genomic data, ...

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Methodological Considerations for Measuring Biofluid-Based MicroRNA Biomarkers

Critical Reviews in Toxicology, 2021

Chorley BN, Atabakhsh E, Doran G, Gautier JC, ...

MicroRNAs (miRNAs) are small non-coding RNA that regulate the expression of messenger RNA and are implicated in almost all cellular processes. Importantly, miRNAs can be released extracellularly and are stable in these matrices where they may serve as indicators of organ or cell-specific toxicity, disease, and biological ...

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Urinary miRNA Biomarkers of Drug-Induced Kidney Injury and Their Site Specificity Within the Nephron

Toxicological Sciences, 2020

Chorley BN, Ellinger-Ziegelbauer H, Tackett M, Simutis FJ, ...

Drug-induced kidney injury (DIKI) is a major concern in both drug development and clinical practice. There is an unmet need for biomarkers of glomerular damage and more distal renal injury in the loop of Henle and the collecting duct (CD). A cross-laboratory program to identify and characterize urinary microRNA (miRNA) patterns ...

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A Cross-Sector Call to Improve Carcinogenicity Risk Assessment Through Use of Genomic Methodologies

Regulatory Toxicology and Pharmacology, 2019

Yauk CL, Harrill AH, Ellinger-Ziegelbauer H, van der Laan JW, ...

Robust genomic approaches are now available to realize improvements in efficiencies and translational relevance of cancer risk assessments for drugs and chemicals. The authors propose a path for implementation of innovative cancer risk assessment including incorporating genomic signatures to assess mechanistic relevance ...

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TGx-DDI, A Transcriptomic Biomarker for Genotoxicity Hazard Assessment of Pharmaceuticals and Environmental Chemicals

Frontiers in Big Data, 2019

Li HH, Yauk C, Chen R, Hyduke DR, Williams A, Frötschl R, ...

Genotoxicity testing is an essential component of the safety assessment paradigm required by regulatory agencies world-wide for analysis of drug candidates, and environmental and industrial chemicals. Current genotoxicity testing batteries feature a high incidence of irrelevant positive findings – particularly for in ...

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RATEmiRs: The Rat Atlas of Tissue-Specific and Enriched miRNAs Database

BMC Genomics, 2018

Bushel PR, Caiment F, Wu H, O'Lone R, Day F, Calley J, Smith A, ...

MicroRNAs (miRNAs) regulate gene expression and have been targeted as indicators of environmental/toxicologic stressors. Using the data from our deep sequencing of miRNAs in an extensive sampling of rat tissues, we developed a database called RATEmiRs for the Rat Atlas of Tissue-specific and Enriched miRNAs to allow users to ...

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