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

Committee Events

HESI Sessions at EMGS 2021 Virtual Annual Meeting

Virtual annual meeting, hosted by the Environmental Mutagenesis and Genomics Society (EMGS)

The Botanical Safety Consortium (BSC), Genetic Toxicology Technical Committee (GTTC), and Emerging Systems Toxicology for the Assessment of Risk (eSTAR) Committee will present their work at the Environmental Mutagenesis and Genomics Society (EMGS) 2021 Virtual Annual Meeting on September 15-25, 2021.

Read more

Journey of Biomarkers: From Discovery to Qualification

Webinar, hosted by HESI and the American Association of Pharmaceutical Scientists (AAPS)

Noninvasive monitoring of nephrotoxicity is challenging. Kidney toxicity is currently monitored by plasma/serum markers, e.g., blood urea nitrogen, and serum creatinine, and urinary markers, such as urinary volume, specific gravity, or osmolality, protein, fractional electrolyte excretion, or sediment examination). ...

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Committee Publications

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Demodifying RNA for Transcriptomic Analyses of Archival Formalin-Fixed Paraffin-Embedded Samples

Archival formalin-fixed paraffin-embedded (FFPE) tissue samples offer a vast but largely untapped resource for genomic research. The primary technical issues limiting use of FFPE samples are RNA yield and quality. In this study, we evaluated methods to demodify RNA highly fragmented and crosslinked by formalin fixation. ...

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Development and Validation of a High-Throughput Transcriptomic Biomarker to Address 21st Century Genetic Toxicology Needs

Interpretation of positive genotoxicity findings using the current in vitro testing battery is a major challenge to industry and regulatory agencies. These tests, especially mammalian cell assays, have high sensitivity but suffer from low specificity, leading to high rates of irrelevant positive findings (i.e., positive ...

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The Rat microRNA Body Atlas: Evaluation of the microRNA Content of Rat Organs Through Deep Sequencing and Characterization of Pancreas Enriched miRNAs as Biomarkers of Pancreatic Toxicity in the Rat and Dog

MicroRNAs (miRNA) are ~19-25 nucleotide long RNA molecules that fine tune gene expression through the inhibition of translation or degradation of the mRNA through incorporation into the RNA induced silencing complex (RISC). MicroRNAs are stable in the serum and plasma, are detectable in a wide variety of ...

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Importance of Investigating Epigenetic Alterations for Industry and Regulators: An Appraisal of Current Efforts by the Health and Environmental Sciences Institute

Recent technological advances have led to rapid progress in the characterization of epigenetic modifications that control gene expression in a generally heritable way, and are likely involved in defining cellular phenotypes, developmental stages and disease status from one generation to the next.

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Sources of Variance in Baseline Gene Expression in the Rodent Liver

The use of gene expression profiling in both clinical and laboratory settings would be enhanced by better characterization of variation due to individual, environmental, and technical factors.

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