RT Journal Article
T1 Systematic Modeling and Design Evaluation of Unperturbed Tumor Dynamics in Xenografts
A1 Parra-Guillen, Zinnia P.
A1 Mangas-Sanjuan, Victor
A1 García-Cremades Mira, María
A1 Troconiz, Iñaki F.
A1 Mo, Gary
A1 Pitou, Celine
A1 Iversen, Philip W.
A1 Wallin, Johan E.
AB Xenograft mice are largely used to evaluate the efficacy of oncological drugs during preclinical phases of drug discovery and development. Mathematical models provide a useful tool to quantitatively characterize tumor growth dynamics and also optimize upcoming experiments. To the best of our knowledge, this is the first report where unperturbed growth of a large set of tumor cell lines (n = 28) has been systematically analyzed using a previously proposed model of nonlinear mixed effects (NLME). Exponential growth was identified as the governing mechanism in the majority of the cell lines, with constant rate values ranging from 0.0204 to 0.203 day−1. No common patterns could be observed across tumor types, highlighting the importance of combining information from different cell lines when evaluating drug activity. Overall, typical model parameters were precisely estimated using designs in which tumor size measurements were taken every 2 days. Moreover, reducing the number of measurements to twice per week, or even once per week for cell lines with low growth rates, showed little impact on parameter precision. However, a sample size of at least 50 mice is needed to accurately characterize parameter variability (i.e., relative S.E. values below 50%). This work illustrates the feasibility of systematically applying NLME models to characterize tumor growth in drug discovery and development, and constitutes a valuable source of data to optimize experimental designs by providing an a priori sampling window and minimizing the number of samples required.
PB American Society for Pharmacology & Experimental Therapeutics
SN 0022-3565
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/100887
UL https://hdl.handle.net/20.500.14352/100887
LA eng
NO Parra-Guillen ZP, Mangas-Sanjuan V, Garcia-Cremades M, Troconiz IF, Mo G, Pitou C, et al. Systematic Modeling and Design Evaluation of Unperturbed Tumor Dynamics in Xenografts. J Pharmacol Exp Ther 2018;366:96–104. https://doi.org/10.1124/jpet.118.248286.
DS Docta Complutense
RD 26 feb 2026