Critical comparison of BMD and TD₅₀ methods for the calculation of acceptable intakes for N-nitroso compounds.

ABSTRACT: The tumorigenic dose 50 (TD₅₀) is a widely used measure of carcinogenic potency which has historically been used to determine acceptable intake limits for carcinogenic compounds. Although broadly used, the TD₅₀ model was not designed to account for important biological factors such as DNA repair and cell compensatory mechanisms, changes in absorption, etc., leading to the development of benchmark dose (BMD) approaches, which use more flexible dose-response models that are better able to account for these processes. Using a nitrosamine dataset as a case study, we compare the impact of moving to a BMD-based limit as opposed to a TD₅₀-based limit. Although there are differences in individual potency estimates between the two approaches for some compounds, we s

SUBMITTER: Thomas R 

PROVIDER: S-EPMC11821704 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature