Abstract

Clinical pathology is recognized as an essential component of the preclinical safety evaluation of test articles (new chemical entities, exploratory novel medicines, and xenobiotics), particularly in short- and medium-term toxicity studies. Traditionally, this evaluation includes clinical chemistry, coagulation, hematology, and urinalysis assessments. The findings of these assessments include details on the general state of health of the animals as well as target organs and general metabolic, adaptive, or harmful processes linked to test material exposure. Consequently, in the preclinical safety assessment of a test article, clinical pathology evaluations aid in the establishment of toxicological dose-response correlations. These findings hold significance and relevance for dose selection in long-term research, as well as for risk assessment and management when applied to humans. Guidance on the fundamentals of clinical pathology testing and interpretation in the species utilized in toxicological investigations is the aim of this chapter. In order to increase testing capacity and enhance its ability to identify more sensitive, early signals of drug-induced target organ toxicity or pathophysiology, the application of clinical pathology testing in preclinical safety assessment as well as the areas of development for novel biomarker implementation within the laboratory are discussed. Lastly, the significance of interpreting clinical pathology and combining the results with data from other studies is emphasized when assessing overall safety or risk assessment

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