Abstract
Purpose
Volume of distribution at steady state (Vdss) is a fundamental pharmacokinetic (PK) parameter driven predominantly by passive processes and physicochemical properties of the compound. Human Vdss can be estimated using in silico mechanistic methods or empirically scaled from Vdss values obtained from preclinical species. In this study the accuracy and the complementarity of these two approaches are analyzed leveraging a large data set (over 150 marketed drugs).
Methods
For all the drugs analyzed in this study experimental in vitro measurements of LogP, plasma protein binding and pKa are used as input for the mechanistic in silico model to predict human Vdss. The software used for predicting human tissue partition coefficients and Vdss based on the method described by Rodgers and Rowland is made available as supporting information.
Results
This assessment indicates that overall the in silico mechanistic model presented by Rodgers and Rowland is comparably accurate or superior to empirical approaches based on the extrapolation of in vivo data from preclinical species.
Conclusions
These results illustrate the great potential of mechanistic in silico models to accurately predict Vdss in humans. This in silico method does not rely on in vivo data and is, consequently, significantly time and resource sparing. The success of this in silico model further suggests that reasonable predictability of Vdss in preclinical species could be obtained by a similar process.
Similar content being viewed by others
Abbreviations
- ADME:
-
Absorption, distribution, metabolism and elimination or excretion
- BP:
-
Blood-to-plasma concentration ratio
- cyno:
-
Cynomologus monkey
- fu:
-
Fraction of compound unbound in plasma
- L/kg:
-
Liter per kilogram
- LogP:
-
The octanol–water partition coefficient
- P&T:
-
Poulin and Theil
- PBPK:
-
Physiologically-based pharmacokinetic modeling
- pKa:
-
The negative base 10 logarithm of the acid dissociation constant
- R&R:
-
Rodgers and Rowland
- Vdss :
-
Volume of distribution at steady state
References
Wagner J. Biopharmaceutics and relevant pharmacokinetics. Hamilton: Drug Intelligence Publications; 1971.
Gibaldi M, Perrier D. Pharmacokinetics. In: Swarbrick J, editor. New York: Marcel Dekker; 1975. p. 175–87.
Riegelman S, Loo J, Rowland M. Concept of a volume of distribution and possible errors in evaluation of this parameter. J Pharm Sci Elsevier Masson SAS. 1968;57:128–33.
Lombardo F, Obach RS, DiCapua FM, Bakken GA, Lu J, Potter DM, et al. A hybrid mixture discriminant analysis-random forest computational model for the prediction of volume of distribution of drugs in human. J Med Chem. 2006;49(7):2262.
Grover A, Benet LZ. Effects of drug transporters on volume of distribution. AAPS J. 2009;11:250–61.
Shugarts S, Benet LZ. The role of transporters in the pharmacokinetics of orally administered drugs. Pharm Res. 2009;26:2039–54.
Obach RS, Baxter JG, Liston TE, Silber BM, Jones BC, MacIntyre F, et al. The prediction of human pharmacokinetic parameters from preclinical and in vitro metabolism data. J Pharmacol Exp Ther. 1997;283:46–58.
Lombardo F, Waters NJ, Argikar UA, Dennehy MK, Zhan J, Gunduz M, et al. Comprehensive assessment of human pharmacokinetic prediction based on in vivo animal pharmacokinetic data, part 1: volume of distribution at steady state. J Clin Pharmacol. 2013;53:167–77.
Poulin P, Theil FP. Prediction of pharmacokinetics prior to in vivo studies. 1. Mechanism-based prediction of volume of distribution. J Pharm Sci Elsevier Masson SAS. 2002;91:129–56.
Berezhkovskiy LM. Volume of distribution at steady state for a linear pharmacokinetic system with peripheral elimination. J Pharm Sci Elsevier Masson SAS. 2004;93:1628–40.
Rodgers T, Leahy D, Rowland M. Physiologically based pharmacokinetic modeling 1: predicting the tissue distribution of moderate-to-strong bases. J Pharm Sci Elsevier Masson SAS. 2005;94:1259–76.
Rodgers T, Rowland M. Physiologically based pharmacokinetic modelling 2: predicting the tissue distribution of acids, very weak bases, neutrals and zwitterions. J Pharm Sci Elsevier Masson SAS. 2006;95:1238–57.
Rodgers T, Rowland M. Mechanistic approaches to volume of distribution predictions: understanding the processes. Pharm Res. 2007;24:918–33.
Jones RDO, Jones HM, Rowland M, Gibson CR, Yates JWT, Chien Y, et al. PhRMA CPCDC initiative on predictive models of human pharmacokinetics, part 2 : comparative assessment of prediction methods of human volume of distribution. 2011;100:4074–89.
Manallack DT. The pKa distribution of drugs: application to drug discovery. Perspect Medicin Chem. 2007;1:25–38.
Wishart DS, Knox C, Guo AC, Shrivastava S, Hassanali M, Stothard P, et al. DrugBank: a comprehensive resource for in silico drug discovery and exploration. 2006;34:668–72.
Benet LZ, Broccatelli F, Oprea TI. BDDCS applied to over 900 drugs. AAPS J. 2011;13:519–47.
Uchimira T, Motohiro K, Tomohisa S, Kinoshita H. Prediction of human blood-to-plasma drug concentration ratio. Biopharm Drug Dispos. 2010:286–97.
Poulin P, Theil F. Development of a novel method for predicting human volume of distribution at steady-state of basic drugs and comparative assessment with existing methods. J Pharm Sci Elsevier Masson SAS. 2009;98:4941–61.
R Core Team. R: A language and environment for statistical computing [Internet]. Vienna, Austria. 2015. Available from: http://www.r-project.org/.
RStudio I. shiny: Easy web applications in R [Internet]. 2017. Available from: http://shiny.rstudio.com/.
Abduljalil K, Edwards D, Barnett A, Rose RH, Cain T, Jamei M. A tutorial on pharmacodynamic scripting facility in Simcyp. CPT Pharmacometrics Syst Pharmacol. 2016;5:455–65.
EC K, Moss AM, Ishisa K, Govindarajan R, Unadkat JD. The role of the equilibrative nucleoside transporter 1 on tissue and fetal distribution of ribavirin in the mouse. Biopharm Drug Dispos. 2016:336–4.
Roberts MS, Magnusson BM, Burczynski FJ, Weiss M. Enterohepatic circulation: physiological, pharmacokinetic and clinical implications. Clin Pharmacokinet. 2002;41:751–90.
Manallack DT, Prankerd RJ, Yuriev E, Oprea TI, David K. The significance of acid/base properties in drug discovery. Chem Soc Rev. 2014;42:485–96.
Berry LM, Li C, Zhao Z, Al BET. Species differences in distribution and prediction of human Vss from preclinical data. Drug Metab Dispos. 2011;39:2103–6.
Haddad S, Poulin P, Krishnan K. Relative lipid content as the sole mechanistic determinant of the adipose tissue: blood partition coefficients of highly lipophilic organic chemicals. Chemosphere. 2000;40:839–43.
Poulin P, Haddad S. Advancing prediction of tissue distribution and volume of distribution of highly lipophilic compounds from a simplified tissue-composition-based model as a mechanistic animal alternative method. J Pharm Sci. Elsevier Masson SAS. 2012;101:2250–61.
Acknowledgments and Disclosures
Rosa Chan was supported by the American Association of Pharmaceutical Scientists Graduate Fellowship, American Foundation for Pharmaceutical Education Pre-Doctoral Fellowship, North American Graduate Fellowship from the American College of Toxicology, and NIGMS grant R25 GM56847. All authors declare no conflict of interest.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Chan, R., De Bruyn, T., Wright, M. et al. Comparing Mechanistic and Preclinical Predictions of Volume of Distribution on a Large Set of Drugs. Pharm Res 35, 87 (2018). https://doi.org/10.1007/s11095-018-2360-2
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s11095-018-2360-2