IVIVE stands for in vitro to in vivo extrapolation. What is its main purpose in risk assessment?

• A. Predict in vivo outcomes from in vitro data using PK/PD modeling
• B. Convert in vivo data to in vitro assays
• C. Replace in vitro data with historical data
• D. Assess toxicity using only computational models without data

Answer: (A)

IVIVE focuses on translating lab-based, in vitro measurements into predictions about what would happen in a living organism, using pharmacokinetic and pharmacodynamic modeling to bridge exposure, concentrations, and effects. In risk assessment, this approach helps estimate actual tissue exposures and potential adverse outcomes, enabling efficient screening and prioritization without relying solely on animal testing. It’s not about turning in vivo data into in vitro conditions, nor about replacing in vitro data with historical data, nor about using computational models in isolation without empirical data.