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Alternative testing systems for evaluating noncarcinogenic, hematologic toxicity

R E Parchment1

  • 1Division of Hematology and Oncology, Karmanos Cancer Institute, Wayne State University, Detroit, Michigan, USA. parchmen@med.wayne.edu

Environmental Health Perspectives
|May 26, 1998
PubMed
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In vitro hematotoxicology predicts adverse blood cell count changes from xenobiotics. While predicting neutropenia is advancing, predicting anemia and thrombocytopenia remains challenging.

Area of Science:

  • Toxicology
  • Hematology
  • Pharmacology

Background:

  • Hematopoietic tissues are susceptible to xenobiotic damage, leading to clinical hematotoxicity (cytopenias or cytoses).
  • In vitro hematotoxicology aims to predict these adverse effects using human hematopoietic targets in controlled lab settings.
  • This field has rapidly advanced, building on experimental hematology and oncology data.

Purpose of the Study:

  • To evaluate the predictive capabilities of in vitro hematotoxicology for adverse hematologic effects.
  • To assess the development of clinical prediction models for hematotoxicity, particularly neutropenia.
  • To identify challenges in predicting certain hematotoxicities like anemia and thrombocytopenia.

Main Methods:

  • Utilizing human hematopoietic progenitors (e.g., colony-forming unit-granulocyte/monocyte) and marrow stromal cells in vitro.

Related Experiment Videos

  • Evaluating proposed endpoints for predicting toxicant exposure levels (MTD, NOAEL) for the neutrophil lineage.
  • Applying analytical chemistry for accurate data interpretation and linking in vitro pharmacodynamics to in vivo pharmacokinetics.

    • Main Results:

    • Progress has been made in predicting neutropenia, with clinical models ready for validation.
    • Specific predictive endpoints facilitate cross-species and cross-chemical comparisons.
    • Predicting acute anemia, thrombocytopenia, and chronic toxicant effects remains more difficult from in vitro data.

    Conclusions:

    • In vitro hematotoxicology shows promise for predicting certain hematotoxicities, especially neutropenia.
    • Further research is needed to improve prediction of other hematotoxicities and chronic effects.
    • Pharmacologic principles guiding in vitro predictions are likely applicable to other proliferative tissue toxicities.