Summary of Clinical Laboratory Studies Performed During Preclinical Safety Evaluation of Medicinal Products (Part I: Haematological Studies)

Preclinical safety evaluation is an important stage in the development of medicinal products. Clinical laboratory studies, including haematological, biochemical and pathomorphological studies, are an essential part of chronic toxicity studies. A careful choice of methodological approaches to examination of toxicological characteristics of drug candidates makes it possible to assess the degree of risk associated with their subsequent clinical use, identify potential target organs, determine the extent of damage, as well as the possibility and dynamics of restoring damaged systems. Key prerequisites for obtaining adequate results of the studies are correct methodological implementation of all the stages of sample preparation and careful consideration of all factors during interpretation of the obtained data. Thus, the choice of methodological approaches to blood tests is often determined by the species, age and sex of laboratory animals, as well as by specific characteristics of the tested drug. The aim of the study was to summarise data on haematological studies performed in the Drug Toxicology Laboratory of the Federal State Budgetary Institute «Zakusov Institute of Pharmacology» when conducting chronic toxicity studies