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General approach for the calculation of tissue to plasma partition coefficients
Abstract
A new mechanistic, universal model for the calculation of steady state tissue:plasma partition coefficients (Kt:p) of organic chemicals in mammalian species was developed. The approach allows the estimation of Kt:p-values based on the composition of the tissues in terms of water, neutral lipids, neutral and acidic phospholipids and proteins using the lipophilicity, the binding to phospholipid membranes, the pKa and the unbound fraction in blood plasma as compound specific parameters. Taking explicitly into account the sign and fraction of the charge of the compounds at the physiological pH the method is universally applicable to neutral, acidic, basic or multiply charged substances and has thus a significantly extended applicability compared to previously published approaches. The model was applied to 59 chemically diverse drug compounds for which tissue:plasma partition coefficients are reported in the literature. In total 474 experimentally observed Kt:p values for 12 tissues and the red blood cells were available and could be compared to model results. For 73% of the calculated values a deviation less than 3-fold from the respective observed value was found, proving the validity of the approach.
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“In addition to the mechanistic models available in Simcyp for estimation of K p values, the PK‐Sim standard 45 and Schmitt 46 models can be applied in PK‐Sim.”
From Does the choice of applied physiologically‐based pharmacokinetics platform matter? A case study on simvastatin disposition and drug–drug interaction (2022) · cites this paper as [46]
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“27 It can be observed that the predictions generated by the proposed framework were comparable to the predictions generated by the PBPK framework (Figure 4, Figure S1).”
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“For this model, tissue: plasma partition coefficients were calculated using the modified Schmitt method provided in the httk R package (Schmitt, 2008).”
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“Differences between predicted and fit PC values are thought to be the result of PC predictions not accounting for uptake limitation by active transport efflux mechanisms (Schmitt 2008), in addition to possible effects of tissue and/or blood binding (see Species Differences below).”
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“This implies that these processes, as part of the MoA ontology model, can be predicted and described in a high level of detail (DeJongh et al., 1997; Schmitt, 2008).”
BackgroundDevelopment and evaluation of a high throughput inhalation model for organic chemicals
Linakis, M. W., Sayre, R. R., Pearce, R. G., Sfeir, M. A., Sipes, N. S., Pangburn, H. A., Gearhart, J. M., & Wambaugh, J. F. (2020) · Journal of Exposure Science & Environmental Epidemiology · doi:10.1038/s41370-020-0238-y · Cited by 26
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Physiologically based pharmacokinetic (PBPK) modeling of meloxicam in different CYP2C9 genotypes
Cho, C., Park, H.-J., Kang, P., Moon, S., Lee, Y. J., Bae, J., Jang, C., & Lee, S. (2021) · Archives of Pharmacal Research · doi:10.1007/s12272-021-01361-3 · Cited by 29
“Schmitt method and PK-Sim® standard method were used to obtain partition coefficient value between intracellular space and plasma, and cellular permeability value between interstitial and cellular space, respectively (Schmitt 2008; Hindmarsh et al. 2018).”
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“…PCgit 0.62i 0.67c 1.49i PCadp 1.24i 0.8c 0.68i a Estimated by QSPRs. b Loizou and Spendiff (2004). c Corley et al. (2000). d Newton et al. (1981). e Hansen et al. (2008). f OECD SIDS (1996). g Ford et al. (2001). h Predicted by ADMET Predictor (https://www.simulations-plus.com/). i Schmitt (2008).”
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Teeguarden, J., Housand, C., Smith, J. N., Hinderliter, P. M., Gunawan, R., & Timchalk, C. A. (2012) · Regulatory Toxicology and Pharmacology · doi:10.1016/j.yrtph.2012.10.007 · Cited by 26
Mielke, H., Anger, L. T., Schug, M., Hengstler, J. G., Stahlmann, R., & Gundert‐Remy, U. (2010) · Archives of Toxicology · doi:10.1007/s00204-010-0612-y · Cited by 25
“The tissue:blood partition coefficients CVT ¼ CTPT were calculated according to Schmitt (2008) which published a biologically based algorithm which takes into account the content of the tissues of water, protein, fat, lipoproteins.”
MethodCodaccioni, M., Bois, F. Y., & Brochot, C. (2019) · Computational Toxicology · doi:10.1016/j.comtox.2019.100111 · Cited by 24
“[89], the maternal placental interstitial tissue subcompartment to 344 maternal plasma partition coefficient (Figure S1) and the fetal placental interstitial tissue 345 subcompartment to fetal plasma partition coefficient are both computed as proposed by Schmitt 346 [92]: 347”
MethodLi, Q., Si, Y., Smith, K. S., Zeng, Q., & Weina, P. J. (2008) · Birth Defects Research Part B Developmental and Reproductive Toxicology · doi:10.1002/bdrb.20164 · Cited by 25
Ufuk, A., Assmus, F., Francis, L., Plumb, J., Damian, V., Gertz, M., Houston, J. B., & Galetin, A. (2017) · Molecular Pharmaceutics · doi:10.1021/acs.molpharmaceut.6b00908 · Cited by 25
High-throughput in-silico prediction of ionization equilibria for pharmacokinetic modeling
Strope, C. L., Mansouri, K., M.A., H. J. C. I., Rabinowitz, J. R., Tebes-Stevens, C. L., & Wambaugh, J. F. (2017) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2017.09.033 · Cited by 25
“…the subscripts denote the matrices (m) cellular tissue (ct), interstitial fluid (it), erythrocytes (e) and plasma (p); Fm is the percent of the tissue comprised by each matrix; PCmw is the PC for each matrix (Peyret et al., 2010), and T is the set of tissues parameterized in Schmitt (2008).”
BackgroundMethodInfluentialGaressus, E. D. G., Mielke, H., & Gundert‐Remy, U. (2019) · Frontiers in Pharmacology · doi:10.3389/fphar.2019.00005 · Cited by 24
“PBPK Model Validation Lactating women were exposed to an oral dose of 300 mg isoniazid in the studies by Ricci and Copaitich (1954), Berlin and Lee (1979), and Singh et al. (2007) and to 200 mg isoniazid in the study by Lass and Bünger (1953).”
MethodArmitage, J. M., Hughes, L., Sangion, A., & Arnot, J. A. (2021) · Environment International · doi:10.1016/j.envint.2021.106557 · Cited by 24
Fan, J., Yang, Y., Grimstein, M., Zhang, X., Kitabi, E. N., Earp, J. C., Arya, V., Reynolds, K. S., Zhu, H., & Wang, Y. (2021) · Clinical Pharmacology & Therapeutics · doi:10.1002/cpt.2445 · Cited by 24
Zheng, L., Yang, H., Dallmann, A., Jiang, X., Wang, L., & Hu, W. M. (2022) · Frontiers in Pharmacology · doi:10.3389/fphar.2021.793346 · Cited by 24
Structure‒tissue exposure/selectivity relationship (STR) correlates with clinical efficacy/safety
Gao, W., Hu, H., Dai, L., He, M., Yuan, H., Zhang, H., Liao, J., Wen, B., Li, Y., Palmisano, M., et al. (2022) · Acta Pharmaceutica Sinica B · doi:10.1016/j.apsb.2022.02.015 · Cited by 25
Rougée, L. R. A., Mohutsky, M. A., Bedwell, D. W., Ruterbories, K. J., & Hall, S. D. (2016) · Drug Metabolism and Disposition · doi:10.1124/dmd.116.071761 · Cited by 24
“…(Waddell and Bates, 1969; Park et al., 1979; Roos and Boron, 1981; Pollock, 1984; Bonventre and Cheung, 1985; Andersson et al., 1987; Fitz et al., 1992; Durand et al., 1993; Strazzabosco et al., 1995; Gerweck and Seetharaman, 1996; Vidal et al., 1998; Schmitt, 2008; Sanchez and Lopez-Zapata, 2015).”
BackgroundDevelopment of QSARs for parameterizing Physiology Based ToxicoKinetic models
Sarigiannis, D. A., Papadaki, K., Kontoroupis, P., & Karakitsios, S. (2017) · Food and Chemical Toxicology · doi:10.1016/j.fct.2017.05.029 · Cited by 24
Pharmacokinetics of the Chlorpyrifos Metabolite 3,5,6-Trichloro-2-Pyridinol (TCPy) in Rat Saliva
Smith, J. N., Wang, J., Lin, Y., & Timchalk, C. A. (2009) · Toxicological Sciences · doi:10.1093/toxsci/kfp283 · Cited by 24
“This approach calculates partitioning coefficients based upon the composition of tissues in terms of water, various types of lipid content, phsopholipid content, proteins, and pH differences using chemical compound–specific lipophilicity, pKa, and plasma-protein binding (Schmitt, 2008).”
BackgroundMethodInfluentialLi, X., Zhang, C., Wang, K., & Lehmler, H. (2020) · Environmental Pollution · doi:10.1016/j.envpol.2020.115233 · Cited by 23
“A number of computational models have been developed to predict the partition coefficients in tissues in the absence of experimental data, including tissue composition-based models (Endo et al., 2013; Schmitt, 2008).”
BackgroundMethodChou, W., Tell, L. A., Baynes, R. E., Davis, J. L., Maunsell, F. P., Riviere, J. E., & Lin, Z. (2022) · Toxicological Sciences · doi:10.1093/toxsci/kfac056 · Cited by 23
“…for drugs without experimentally measured values, a compiled integrative algorithm consisting of 5 frequently used mechanistic equations (Berezhkovskiy, 2004; Poulin and Theil, 2002; Rodgers et al., 2005; Rodgers and Rowland, 2006; Schmitt, 2008) was developed and incorporated into the PBPK model.”
MethodBlock, M. (2015) · Expert Opinion on Drug Metabolism & Toxicology · doi:10.1517/17425255.2015.1037276 · Cited by 23
Huizer, D., Oldenkamp, R., Ragas, A. M. J., van Rooij, J. G. M., & Huijbregts, M. A. J. (2012) · Toxicology Letters · doi:10.1016/j.toxlet.2012.08.016 · Cited by 23
Equilibrium biopartitioning of organic anions – A case study for humans and fish
Goss, K., Bittermann, K., Henneberger, L., & Linden, L. (2018) · Chemosphere · doi:10.1016/j.chemosphere.2018.02.026 · Cited by 23
Application of Reverse Dosimetry to Compare In Vitro and In Vivo Estrogen Receptor Activity
Chang, X., Kleinstreuer, N., Ceger, P. C., Hsieh, J., Allen, D., & Casey, W. (2015) · Applied In Vitro Toxicology · doi:10.1089/aivt.2014.0005 · Cited by 25
Li, Q., Xie, L. H., Zhang, J., & Weina, P. J. (2008) · Journal of Pharmaceutical and Biomedical Analysis · doi:10.1016/j.jpba.2008.07.015 · Cited by 23
Lee, C. M., Zane, N. R., Veal, G. J., & Thakker, D. R. (2019) · CPT Pharmacometrics & Systems Pharmacology · doi:10.1002/psp4.12453 · Cited by 22
“Tissue to plasma partition coefficients were determined in PK-Sim using a method described by Schmitt.(24) In vitro kinetic constants (Km and Vmax) for the formation of the vincristine metabolite M1 by recombinant CYP3A4 and CYP3A5 were used.”
MethodYellepeddi, V., Parashar, K., Dean, S. M., Watt, K., Constance, J. E., & Baker, O. J. (2020) · Clinical and Translational Science · doi:10.1111/cts.12930 · Cited by 23
Bioconcentration of Several Series of Cationic Surfactants in Rainbow Trout
Kierkegaard, A., Sundbom, M., Yuan, B., Armitage, J. M., Arnot, J. A., Droge, S. T. J., & McLachlan, M. S. (2021) · Environmental Science & Technology · doi:10.1021/acs.est.1c02063 · Cited by 22
Algharably, E., Consiglio, E. D., Testai, E., Pistollato, F., Mielke, H., & Gundert-Remy, U. (2022) · Frontiers in Toxicology · doi:10.3389/ftox.2022.885843 · Cited by 19
“1 Kinetic Model Evaluation When using the tissue/blood partitioning coefficient calculated by the algorithm of Schmitt (Schmitt, 2008a; Schmitt, 2008b) of 3.”
MethodInfluentialMavroudis, P. D., Teutonico, D., Abós, A., & Pillai, N. (2023) · Frontiers in Systems Biology · doi:10.3389/fsysb.2023.1180948 · Cited by 22
“…either in vivo or microsomal intrinsic clearance (CL or CL int ), and we tested fi ve distribution models: Berezhkovskiy (Berezhkovskiy, 2004), PK-Sim standard (Willmann et al., 2005), Poulin and Theil (Poulin and Theil, 2000), Rodgers and Rowland (Rodgers et al., 2005), and Schmidt (Schmitt, 2008).”
Partosch, F., Mielke, H., & Gundert‐Remy, U. (2013) · Archives of Toxicology · doi:10.1007/s00204-013-1022-8 · Cited by 22
“The tissue/blood partitioning was calculated according to Schmitt (2008).”
MethodInfluentialYang, C., Zhao, K., Liu, F., Xie, Q., Zhong, Z., Miao, M., Liu, X., & Liu, L. (2016) · Frontiers in Pharmacology · doi:10.3389/fphar.2016.00488 · Cited by 22
“Its analogs etoposide and teniposide have already been widely used for the treatment of lung cancer, leukemia and lymphoma (Smith et al., 1994; Baldwin and Osheroff, 2005; Wu et al., 2014).”
BackgroundRapid experimental measurements of physicochemical properties to inform models and testing
Nicolas, C. I., Mansouri, K., Phillips, K. A., Grulke, C., Richard, A. M., Williams, A. J., Rabinowitz, J. R., Isaacs, K., Yau, A. Y., & Wambaugh, J. F. (2018) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2018.04.266 · Cited by 22
Codaccioni, M., & Brochot, C. (2020) · Toxicology and Applied Pharmacology · doi:10.1016/j.taap.2020.115318 · Cited by 23
Zheng, L., Tang, S., Tang, R., Xu, M., Jiang, X., & Wang, L. (2020) · Clinical Pharmacokinetics · doi:10.1007/s40262-020-00962-3 · Cited by 22
Heredia‐Ortiz, R., Maı̂tre, A., Barbeau, D., Lafontaine, M., & Bouchard, M. (2014) · PLoS ONE · doi:10.1371/journal.pone.0102570 · Cited by 21
“Typically, these types of models are constructed from the interactions observed for a given substance with different organs, tissues and fluids in vitro [21–23], directly from the physicochemical characteristics of the substance under study [24] or simply by mathematically extrapolating its behaviour on the basis of s…”
BackgroundZubiaur, P., Kneller, L. A., Ochoa, D., Mejía-Abril, G. P., Saiz‐Rodríguez, M., Borobia, A. M., Koller, D., García-García, I., Navares‐Gómez, M., Hempel, G., et al. (2020) · Clinical Pharmacokinetics · doi:10.1007/s40262-020-00941-8 · Cited by 21
A generic avian physiologically-based kinetic (PBK) model and its application in three bird species
Baier, V., Paini, A., Schaller, S., Scanes, C. G., Bone, A. J., Ebeling, M., Preuß, T. G., Witt, J., & Heckmann, D. (2022) · Environment International · doi:10.1016/j.envint.2022.107547 · Cited by 21
Prieto Garcia, L., Lundahl, A., Ahlström, C., Vildhede, A., Lennernäs, H., & Sjögren, E. (2022) · CPT: Pharmacometrics & Systems Pharmacology · doi:10.1002/psp4.12837 · Cited by 21
Khambhawala, A., Lee, C. H., & Kwon, J. S. (2025) · Industrial & Engineering Chemistry Research · doi:10.1021/acs.iecr.5c01387 · Cited by 21
Karkhanis, A. V., Leow, J. W. H., Hagen, T., & Chan, E. C. Y. (2018) · Toxicological Sciences · doi:10.1093/toxsci/kfy011 · Cited by 20
van der Heijden, J. E. M., Freriksen, J. J. M., de Hoop‐Sommen, M. A., Greupink, R., & de Wildt, S. N. (2023) · Clinical Pharmacology & Therapeutics · doi:10.1002/cpt.3023 · Cited by 20
“Methods to predict tissue partition coefficients are developed by, for example, Berezhkovskiy, 42 Rodgers and Rowland, 43 Poulin and Theil, 44 and Schmitt, 45 to allow the use of the so-called full-PBPK distribution model.”
Mi, K., Wu, X., & Lin, Z. (2025) · Environment International · doi:10.1016/j.envint.2025.109339 · Cited by 20
Salmina, E. S., Wondrousch, D., Kühne, R., Potemkin, V., & Schüürmann, G. (2016) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2016.01.107 · Cited by 20
Caffeine intake in pregnancy: relationship between internal intake and effect on birth weight
Partosch, F., Mielke, H., Stahlmann, R., & Gundert-Remy, U. (2015) · Food and Chemical Toxicology · doi:10.1016/j.fct.2015.11.005 · Cited by 19
Cho, C.-K., Kang, P., Park, H.-J., Ko, E., Mu, C.-Y., Lee, Y.-J., Choi, C.-I., Kim, H. S., Jang, C., Bae, J., et al. (2022) · Archives of pharmacal research · doi:10.1007/s12272-022-01388-0 · Cited by 19
“Partition coefficients and cellular permeabilities were estimated as Schmitt and PK-Sim® standard methods, respectively (Schmitt 2008; Hindmarsh et al.”
MethodLee, C.-M., Kang, P., Cho, C.-K., Park, H.-J., Lee, Y.-J., Bae, J., Choi, C.-I., Kim, H. S., Jang, C., & Lee, S.-Y. (2022) · Archives of pharmacal research · doi:10.1007/s12272-022-01394-2 · Cited by 16
“2005a, b; Rodgers and Rowland 2007; Schmitt 2008).”
BackgroundMethodTan, Y., Barton, H. A., Boobis, A. R., Brunner, R., M.A., H. J. C. I., Cope, R. B., Dawson, J. L., Domoradzki, J. Y., Egeghy, P. P., Gulati, P., et al. (2021) · Regulatory Toxicology and Pharmacology · doi:10.1016/j.yrtph.2021.105070 · Cited by 19
“Some of these parameters can also be predicted in silico based on chemical structure and physiochemical properties (Dawson et al., 2021; Ingle et al., 2016; Obach et al., 2008; Poulin and Krishnan, 1996a, 1996b; Poulin and Theil, 2000; Sarigiannis et al., 2017; Schmitt, 2008).”
BackgroundChen, Y., Ke, M., Xu, J., & Lin, C. (2020) · AAPS PharmSciTech · doi:10.1208/s12249-020-1638-y · Cited by 19
Najjar, A., Schepky, A. G., Krueger, C.-T., Dent, M. P., Cable, S., Li, H., Grégoire, S., Roussel, L., Noel-Voisin, A., Hewitt, N. J., et al. (2022) · Frontiers in Pharmacology · doi:10.3389/fphar.2021.802514 · Cited by 18
“Cellular permeabilities Charge dependent (Schmitt, 2008) Charge dependent (Schmitt, 2008)”
BackgroundMethodAlgharably, E. A. E., Consiglio, E. D., Testai, E., Pistollato, F., Bal‐Price, A., Najjar, A., Kreutz, R. H., & Gundert‐Remy, U. (2023) · Frontiers in Pharmacology · doi:10.3389/fphar.2023.1136174 · Cited by 18
“Tissue partition coefficient was modelled according to Schmidt algorithm (Schmitt, 2008a; Schmitt, 2008b) implemented in the software (Table 1; Supplementary Table S1).”
MethodMielke, H., Consiglio, E. D., Kreutz, R. H., Partosch, F., Testai, E., & Gundert‐Remy, U. (2016) · Archives of Toxicology · doi:10.1007/s00204-016-1863-z · Cited by 18
Screening tools for the bioconcentration potential of monovalent organic ions in fish
Bittermann, K., Linden, L., & Goss, K. (2018) · Environmental Science Processes & Impacts · doi:10.1039/c8em00084k · Cited by 18
Wong, Y. C., Centanni, M., & de Lange, E. C. M. (2019) · The Journal of Clinical Pharmacology · doi:10.1002/jcph.1365 · Cited by 18
Baumer, A., Jäsch, S., Ulrich, N., Bechmann, I., Landmann, J., Stöver, A., & Escher, B. I. (2021) · Environment International · doi:10.1016/j.envint.2021.106867 · Cited by 18
Walters, D. C., Jansen, E. E. W., Ainslie, G. R., Salomons, G. S., Brown, M. N., Schmidt, M. A., Roullet, J., & Gibson, K. M. (2019) · Pharmacology Research & Perspectives · doi:10.1002/prp2.456 · Cited by 18
Evaluation of a rapid, generic human gestational dose model
Kapraun, D. F., Sfeir, M. A., Pearce, R. G., Davidson-Fritz, S. E., Lumen, A., Dallmann, A., Judson, R. S., & Wambaugh, J. F. (2022) · Reproductive Toxicology · doi:10.1016/j.reprotox.2022.09.004 · Cited by 19
Martins, F. S., Martins, J. E. S., Severino, P. B., Annaert, P., & Sy, S. K. B. (2023) · British Journal of Clinical Pharmacology · doi:10.1111/bcp.15731 · Cited by 17
“The information on logP, pKa and fraction unbound in plasma for each drug was obtained from the DrugBank database; the partition coefficients in the tissues were calculated using PK-Sim standard and Schmitt method.(24)”
A Comparative Analysis of Drug-Induced Hepatotoxicity in Clinically Relevant Situations
Thiel, C., Cordes, H., Fabbri, L., Aschmann, H. E., Baier, V., Smit, I. A., Atkinson, F. L., Blank, L. M., & Kuepfer, L. (2017) · PLoS Computational Biology · doi:10.1371/journal.pcbi.1005280 · Cited by 16
“Distribution models describing mass transfer are parameterized based on physicochemical drug properties and are used to determine partition coefficients as well as cellular permeability values between these compartments [62,63,64,65].”
Predicting Storage–Lipid Water Partitioning of Organic Solutes from Molecular Structure
Geisler, A., Oemisch, L., Endo, S., & Goss, K. (2015) · Environmental Science & Technology · doi:10.1021/es506336m · Cited by 17
Loer, H. L. H., Türk, D., Gómez‐Mantilla, J. D., Selzer, D., & Lehr, T. (2022) · Pharmaceutics · doi:10.3390/pharmaceutics14050915 · Cited by 16
Pepin, X. J. H., Grant, I., & Wood, J. M. (2023) · Pharmaceutical Research · doi:10.1007/s11095-023-03567-0 · Cited by 16
“Fractional cell volumes and extracellular volumes are reported in the physiologically based PBPK literature and for adipose amount to 0.86 and 0.14 respectively [10].”
BackgroundInfluentialUnraveling bisphenol A pharmacokinetics using physiologically based pharmacokinetic modeling
Yang, X., & Fisher, J. W. (2015) · Frontiers in Pharmacology · doi:10.3389/fphar.2014.00292 · Cited by 16
Modeling bioavailability to organs protected by biological barriers
Quignot, N. (2013) · In Silico Pharmacology · doi:10.1186/2193-9616-1-8 · Cited by 16
“Some of the absorption and distribution parameters may be estimated on the basis of tissue composition data and of the drug’s physicochemical properties via quantitative structure-properties models (Schmitt 2008).”
BackgroundBaumer, A., Jäsch, S., Ulrich, N., Bechmann, I., Landmann, J., & Escher, B. I. (2021) · Environmental Science & Technology · doi:10.1021/acs.est.1c01836 · Cited by 15
Mian, P., Nolan, B. E., van den Anker, J. N., Calsteren, K. V., Allegaert, K., Lakhi, N. A., & Dallmann, A. (2021) · Frontiers in Pediatrics · doi:10.3389/fped.2021.733520 · Cited by 15
“KM_int : perf was calculated from the biochemical tissue composition of the cotyledon and the drug’s physicochemical properties using the equation published by Schmitt (26).”
MethodInfluentialYeung, C. H. T., Beers, J. L., Jackson, K. D., & Edginton, A. N. (2022) · CPT Pharmacometrics & Systems Pharmacology · doi:10.1002/psp4.12908 · Cited by 15
Maaß, C., Schaller, S., Dallmann, A., Bothe, K., & Müller, D. (2023) · Toxicological Sciences · doi:10.1093/toxsci/kfad007 · Cited by 15
“In PK-Sim, the partition coefficients are calculated using partitioning surrogate measures and any of the 5 different published partitioning methodologies (Berezhkovskiy, 2004; Poulin and Theil, 2002; Rodgers et al., 2005; Rodgers and Rowland, 2006; Schmitt, 2008; Willmann et al., 2003).”
InfluentialMcNally, K., Sams, C., & Loizou, G. (2019) · Frontiers in Pharmacology · doi:10.3389/fphar.2019.01394 · Cited by 14
Long, T., Cristofoletti, R., Cicali, B., Michaud, V., Dow, P., Turgeon, J., & Schmidt, S. (2021) · The Journal of Clinical Pharmacology · doi:10.1002/jcph.1951 · Cited by 15
Wood, A., Atienzar, F., Basili, D., Coulet, M., Fernandez, R., Galano, M., Marin‐Kuan, M., Montoya, G. A., Piechota, P., Punt, A., et al. (2025) · Regulatory Toxicology and Pharmacology · doi:10.1016/j.yrtph.2025.105863 · Cited by 14
Pregnancy-PBPK models: How are biochemical and physiological processes integrated?
Thépaut, É., Brochot, C., Chardon, K., Personne, S., & Zeman, F. (2023) · Computational Toxicology · doi:10.1016/j.comtox.2023.100282 · Cited by 14
Mehta, K., Balazki, P., van der Graaf, P. H., Guo, T., & van Hasselt, J. G. C. (2024) · Clinical Pharmacokinetics · doi:10.1007/s40262-024-01363-6 · Cited by 14
“The partition coefficient between plasma and CSF was calculated by incorporating fractions of water, lipid, and protein albumin in CSF as shown in Table 2 [29, 36, 37].”
MethodFirst principles pharmacokinetic modeling: A quantitative study on Cyclosporin
Mošat’, A., Lueshen, E., Heitzig, M., Hall, C., Linninger, A. A., Sin, G., & Rafiqul Gani, A. (2013) · Computers & Chemical Engineering · doi:10.1016/j.compchemeng.2013.03.026 · Cited by 14
“…this model for 8 A. Mošat’ et al. / Computers and C One possible scenario for drug fate modeling in the whole body s to determine the drug transport parameters by in vitro measure- ents, for instance with tissue-to-plasma partitioning coefficients Haritova & Fink-Gremmels, 2010; Schmitt, 2008).”
BackgroundGajewska, M., Worth, A. P., Urani, C., Briesen, H., & Schramm, K. ‐. (2014) · Regulatory Toxicology and Pharmacology · doi:10.1016/j.yrtph.2014.07.015 · Cited by 14
Mielke, H., Abraham, K., Götz, M. E., Vieth, B., Lampen, A., Luch, A., & Gundert‐Remy, U. (2011) · Toxicology Letters · doi:10.1016/j.toxlet.2011.01.022 · Cited by 14
Environmental Sorption Behavior of Ionic and Ionizable Organic Chemicals
Henneberger, L., & Goss, K. (2019) · Reviews of Environmental Contamination and Toxicology · doi:10.1007/398_2019_37 · Cited by 15
Qian, Y., & Markowitz, J. S. (2022) · Drug Metabolism and Disposition · doi:10.1124/dmd.121.000823 · Cited by 14
Physiologically based pharmacokinetic (PBPK) modeling of flurbiprofen in different CYP2C9 genotypes
Whang, S.-S., Cho, C., Jung, E. H., Kang, P., Park, H.-J., Lee, Y. J., Choi, C., Bae, J., Kim, H. S., Jang, C., et al. (2022) · Archives of Pharmacal Research · doi:10.1007/s12272-022-01403-4 · Cited by 14
“Schmitt (2008) and PKSim® standard method (Hindmarsh et al.”
Computational strategy for quantifying human pesticide exposure based upon a saliva measurement
Timchalk, C. A., Weber, T. J., & Smith, J. N. (2015) · Frontiers in Pharmacology · doi:10.3389/fphar.2015.00115 · Cited by 14
“Numerous partitioning algorithms exist (Poulin and Krishnan, 1995; Rodgers et al., 2005; Schmitt, 2008; Peyret et al., 2010).”
BackgroundMethodInfluentialSaylor, K., & Zhang, C. (2016) · Toxicology and Applied Pharmacology · doi:10.1016/j.taap.2016.07.017 · Cited by 14
“…placed on the accuracy of both the venous and arterial blood concentrations due to the large variability in both calculated (Poulin and Theil, 2000; Schmitt, 2008; Peyret et al., 2010) and experimentally determined (Gabrielsson and Bondesson, 1987; Benowitz et al., 1990; Plowchalk et al., 1992;…”
BackgroundA minimal physiologically based pharmacokinetic model for high-dose methotrexate
Pesenti, G., Foppoli, M., & Manca, D. (2021) · Cancer Chemotherapy and Pharmacology · doi:10.1007/s00280-021-04305-2 · Cited by 13
Advances in computational methods along the exposure to toxicological response paradigm
El-Masri, H. A., Friedman, K. P., Isaacs, K., & Wetmore, B. A. (2022) · Toxicology and Applied Pharmacology · doi:10.1016/j.taap.2022.116141 · Cited by 14
Jeong, S., Jang, J.-H., & Lee, Y. (2022) · Journal of Pharmaceutical Sciences · doi:10.1016/j.xphs.2022.08.035 · Cited by 13
D, K. H. M., Sakamoto, S., Kageyama, M., & Iijima, T. (2023) · European Journal of Drug Metabolism and Pharmacokinetics · doi:10.1007/s13318-023-00832-w · Cited by 13
“Vol.:(0123456789) * Koichi Handa ko.handa@teijin.co.jp 1 Toxicology & DMPK Research Department, Teijin Institute for Bio-Medical Research, Teijin Pharma Limited, 4-3-2 Asahigaoka, Hino-shi, Tokyo 191-8512, Japan 2 Pharmaceutical Development Coordination Department, Teijin Pharma Limited, 3-2-1, Kasumigaseki Common Gat…”
BackgroundMethodResultInfluentialInteraction of MRI Contrast Agent [Gd(DOTA)] − with Lipid Membranes: A Molecular Dynamics Study
Oliveira, A. C., Filipe, H. A. L., Geraldes, C. F. G. C., Voth, G. A., Moreno, M. J., & Loura, L. M. S. (2024) · Inorganic Chemistry · doi:10.1021/acs.inorgchem.4c00972 · Cited by 13
Estimation of Intra-vitreal Half-Lifes in the Rabbit Eye with Semi-mechanistic Equations
Schmitt, W. (2016) · Pharmaceutical Research · doi:10.1007/s11095-016-2037-7 · Cited by 13
Self-citationSystems Biology to Support Nanomaterial Grouping
Riebeling, C., Jungnickel, H., Luch, A., & Haase, A. (2017) · Advances in experimental medicine and biology · doi:10.1007/978-3-319-47754-1_6 · Cited by 13
Liu, X. I., Green, D. J., van den Anker, J. N., Rakhmanina, N. Y., Ahmadzia, H. K., Momper, J. D., Park, K., Burckart, G. J., & Dallmann, A. (2021) · Frontiers in Pediatrics · doi:10.3389/fped.2021.723006 · Cited by 13
“(7) To refine Equation (4), Kwater,int and Kwater,cell were expressed as: Kwater,int = fu_fetus Kint,pls (8) Kwater,cell = fu_fetus Kcell,pls (9) Kint,pls is calculated according to Equation (6), while several equations were reported for predicting Kcell,pls, namely the PKSim Standard equation (24) and the equations p…”
MethodInfluentialExposure of Nursed Infants to Maternal Treatment with Ethambutol and Rifampicin
Partosch, F., Mielke, H., Stahlmann, R., & Gundert‐Remy, U. (2018) · Basic & Clinical Pharmacology & Toxicology · doi:10.1111/bcpt.12995 · Cited by 13
Tremblay, R. T., Kim, D., & Fisher, J. W. (2012) · Journal of Toxicology and Environmental Health · doi:10.1080/15287394.2012.652059 · Cited by 13
“More recent predictive models aimed at ionizable compounds are available but limited to the prediction of tissue to plasma partition coefficients ( Poulin and Theil 2002 ; Rodgers and Rowland 2006 ; Schmitt 2008 ).”
Applying New Approach Methods for Toxicokinetics for Chemical Risk Assessment
Wambaugh, J. F., Friedman, K. P., Beal, M. A., Moffat, I. D., Hughes, M. F., Nong, A., Dorne, J. L. C. M., Ashraf, M. W., Barton‐Maclaren, T. S., DeVito, M. J., et al. (2025) · Chemical Research in Toxicology · doi:10.1021/acs.chemrestox.5c00161 · Cited by 14
Sutter, P. D., Cock, P. A. J. G. D., Johnson, T. N., Musther, H., Gasthuys, E., & Vermeulen, A. (2023) · Drug Metabolism and Disposition · doi:10.1124/dmd.122.001129 · Cited by 12
Gong, F., Hu, H., Ouyang, Y., Liao, Z., Kong, Y., Hu, J., He, H., & Zhou, Y. (2023) · Toxicology and Applied Pharmacology · doi:10.1016/j.taap.2023.116475 · Cited by 12
Metadata
- Authors
- Schmitt, W.
- Affiliations
- Bayer (Germany) (DE)
- Corresponding author
- Schmitt, Walter
- ORCID
- Schmitt, Walter
- Venue
- Toxicology in Vitro
- Publisher
- Elsevier BV
- Published
- 2008-03
- Volume
- 22
- Issue
- 2
- Pages
- 457-467
- ISSN
- 0887-2333 (ISSN-L)
- OpenAlex
- W2026015795
- Cited by
- 349
- References
- 38
- Citations by year
- 2026: 16 · 2025: 32 · 2024: 19 · 2023: 34 · 2022: 39 · 2021: 33 · 2020: 20 · 2019: 20 · 2018: 16 · 2017: 25 · 2016: 15 · 2015: 14 · 2014: 13 · 2013: 16 · 2012: 17
- FWCI
- 3.90
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Toxicology in Vitro (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Drug Discovery › Computational Drug Discovery Methods
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Interaction Studies and Fluorescence Analysis
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
- Keywords
- tissue-to-plasma partition coefficient, organic compounds, lipophilicity, tissue composition, pKa, drug compounds, mechanistic model, erythrocytes
- MeSH terms
- Algorithms, Animals, Chemistry, Physical, Hydrogen-Ion Concentration, Lipids, Phospholipids, Plasma, Proteins, Tissue Distribution, Models, Statistical, Xenobiotics, Extracellular Fluid, Rats, Chemical Phenomena
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