Abstract:Developmental and reproductive toxicity (DART) evaluation of biopharmaceuticals frequently necessitates the use of nonhuman primate models (NHPs) owing to species specificity. NHPs offer several advantages over rodents and rabbits with regard to DART because of similarity to human. This article provides a state‐of‐the‐art account on the feasibility and limitations of using NHPs for DART evaluation in the context of preclinical development of biopharmaceuticals.
“…Determining the corresponding immunologic age of an NHP to that of a human can be difficult. Parameters that can be used include the relative ratios of CD4:CD8 cells (Hendrickx, Peterson, and Makori 2005;Weinbauer et al 2008) and also serum immunoglobulin levels (Buse 2005;Hendrickx, Peterson, and Makori 2005;Isaacs et al 1983) because both change after birth over time.…”
Section: Integrated Approaches To Developmental Immunotoxicology Assementioning
Developmental immunotoxicity (DIT) has gained attention with the recognition that environmental chemicals can potentially affect the developing immune system and the incidence of childhood allergic diseases. Preclinical safety assessment of pharmaceuticals for men and women of childbearing potential as well as for pediatric and juvenile indications may require DIT assessments. Draft documents from environmental and chemical regulatory agencies propose strategies that use the rat as a test species and incorporate histopathology and functional testing as endpoints. While there are no guidelines for DIT assessment of pharmaceuticals, current discussions suggest that combining immunotoxicity and developmental and reproductive toxicology studies may serve this purpose. Knowledge of the principles and applications of DIT will facilitate participation in strategy development and effective conduct of relevant studies.
“…Determining the corresponding immunologic age of an NHP to that of a human can be difficult. Parameters that can be used include the relative ratios of CD4:CD8 cells (Hendrickx, Peterson, and Makori 2005;Weinbauer et al 2008) and also serum immunoglobulin levels (Buse 2005;Hendrickx, Peterson, and Makori 2005;Isaacs et al 1983) because both change after birth over time.…”
Section: Integrated Approaches To Developmental Immunotoxicology Assementioning
Developmental immunotoxicity (DIT) has gained attention with the recognition that environmental chemicals can potentially affect the developing immune system and the incidence of childhood allergic diseases. Preclinical safety assessment of pharmaceuticals for men and women of childbearing potential as well as for pediatric and juvenile indications may require DIT assessments. Draft documents from environmental and chemical regulatory agencies propose strategies that use the rat as a test species and incorporate histopathology and functional testing as endpoints. While there are no guidelines for DIT assessment of pharmaceuticals, current discussions suggest that combining immunotoxicity and developmental and reproductive toxicology studies may serve this purpose. Knowledge of the principles and applications of DIT will facilitate participation in strategy development and effective conduct of relevant studies.
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