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Abstract

Frequently, analysis of skin absorption does not only require the careful evaluation of experimental data but also the fundamental understanding of underlying physics to apply the appropriate mathematical concepts to attain insight into transport kinetics. This chapter will introduce the basic mathematics which are necessary to evaluate skin permeation and skin penetration experiments. The most common approaches are introduced and reviewed critically concerning their applicability as well as limitation. Solution techniques for dealing with infinite and finite dose cases are presented. Several analytical solutions for specific cases are presented and discussed, as well as an outlook on more advanced

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Notes

  1. 1.

    DSkin® http://www.scientific-consilience.com

  2. 2.

    Python: http://www.python.org

References

  • Agatonovic-Kustrin S, Beresford R, Yusof APM (2001) ANN modeling of the penetration across a polydimethylsiloxane membrane from theoretically derived molecular descriptors. J Pharm Biomed Anal 26(2):241–254

    Article  CAS  PubMed  Google Scholar 

  • Anderson BD, Raykar PV (1989) Solute structure–permeability relationships in human stratum corneum. J Invest Dermatol 93(2):280–286

    Article  CAS  PubMed  Google Scholar 

  • Anderson BD, Higuchi WI, Raykar PV (1988) Heterogeneity effects on permeability–partition coefficient relationships in human stratum corneum. Pharm Res 5(9):566–573

    Article  CAS  PubMed  Google Scholar 

  • Anissimov YG, Roberts MS (1999) Diffusion modeling of percutaneous absorption kinetics. 1. Effects of flow rate, receptor sampling rate, and viable epidermal resistance for a constant donor concentration. J Pharm Sci 88(11):1201–1209

    Article  CAS  PubMed  Google Scholar 

  • Anissimov YG, Roberts MS (2001) Diffusion modeling of percutaneous absorption kinetics: 2. Finite vehicle volume and solvent deposited solids. J Pharm Sci 90(4):504–520

    Article  CAS  PubMed  Google Scholar 

  • Anissimov YG, Roberts MS (2004) Diffusion modeling of percutaneous absorption kinetics: 3. Variable diffusion and partition coefficients, consequences for stratum corneum depth profiles and desorption kinetics. J Pharm Sci 93(2):470–487

    Article  CAS  PubMed  Google Scholar 

  • Anissimov YG, Roberts MS (2009) Diffusion modelling of percutaneous absorption kinetics: 4. Effects of a slow equilibration process within stratum corneum on absorption and desorption kinetics. J Pharm Sci 98(2):772–781

    Article  CAS  PubMed  Google Scholar 

  • Anissimov YG, Jepps OG, Dancik Y, Roberts MS (2013) Mathematical and pharmacokinetic modelling of epidermal and dermal transport processes. Adv Drug Deliv Rev 65(2):169–190

    Article  CAS  PubMed  Google Scholar 

  • Barbero AM, Frasch F (2009) Pig and guinea pig skin as surrogates for human in vitro penetration studies: a quantitative review. Toxicol In Vitro 23(1):1–13

    Article  CAS  PubMed  Google Scholar 

  • Barbero AM, Frasch HF (2005) Modeling of diffusion with partitioning in stratum corneum using a finite element model. Ann Biomed Eng 33(9):1281–1292

    Article  PubMed  Google Scholar 

  • Bartek MJ, LaBudde JA, Maibach HI (1972) Skin permeability in vivo: comparison in rat, rabbit, pig and man. J Invest Dermatol 58(3):114–123

    Article  CAS  PubMed  Google Scholar 

  • Brain KR, Walters KA, Watkinson AC (2002) Methods for studying percutaneous absorption. In: Walters KA (ed) Dermatological and transdermal formulations. Marcel Dekker AG, New York, pp 197–270

    Google Scholar 

  • Brent RP (1973) Algorithms for minimization without derivatives. Prentice–Hall, Englewood Cliffs, chap 3–4

    Google Scholar 

  • Bronaugh RL, Maibach HI (1985) Percutaneous absorption of nitroaromatic compounds: in vivo and in vitro studies in the human and monkey. J Invest Dermatol 84(3):180–183

    Article  CAS  PubMed  Google Scholar 

  • Bronaugh RL, Stewart RF (1985) Methods for in vitro percutaneous absorption studies. iv: the flow–through diffusion cell. J Pharm Sci 74(1):64–67

    Article  CAS  PubMed  Google Scholar 

  • Buist HE, van Burgsteden JA, Freidig AP, Maas WJM, van de Sandt JJM (2010) New in vitro dermal absorption database and the prediction of dermal absorption under finite conditions for risk assessment purposes. Regul Toxicol Pharmacol 57(2–3):200–209

    Article  CAS  PubMed  Google Scholar 

  • Carslaw H, Jaeger J (1959) Conduction of heat in solids. Clarendon, Oxford, chap 128

    Google Scholar 

  • Chatelain E, Gabard B, Surber C (2003) Skin penetration and sun protection factor of five uv filters: effect of the vehicle. Skin Pharmacol Appl Skin Physiol 16:28–35

    Article  CAS  PubMed  Google Scholar 

  • Chen LJ, Lian GP, Han LJ (2007) Prediction of human skin permeability using artificial neural network (ANN) modeling. Acta Pharmacol Sin 28(4):591–600

    Article  CAS  PubMed  Google Scholar 

  • Chien YW, Chien TY, Bagdon RE, Huang YC, Bierman RH (1989) Transdermal dual-controlled delivery of contraceptive drugs: formulation development, in vitro and in vivo evaluations, and clinical performance. Pharm Res 6:1000–1010

    Article  CAS  PubMed  Google Scholar 

  • Cnubben NH, Elliott GR, Hakkert BC, Meuling WJ, van de Sandt JJ (2002) Comparative in vitro-in vivo percutaneous penetration of the fungicide ortho-phenylphenol. Regul Toxicol Pharmacol 35(2):198–208

    Article  CAS  PubMed  Google Scholar 

  • Cooper ER, Berner B (1985) Finite dose pharmacokinetics of skin penetration. J Pharm Sci 74(10):1100–1102

    Article  CAS  PubMed  Google Scholar 

  • Crank J (1975) The mathematics of diffusion, 2nd edn. Oxford University Press, London

    Google Scholar 

  • Dancik Y, Anissimov YG, Jepps OG (2012) Convective transport of highly plasma protein bound drugs facilitates direct penetration into deep tissues after topical application. Br J Clin Pharmacol 73(4):564–578

    Article  CAS  PubMed  Google Scholar 

  • Davies M, Pendlington RU, Page L, Roper CS, Sanders DJ, Bourner C, Pease CK, MacKay C (2011) Determining epidermal disposition kinetics for use in an integrated nonanimal approach to skin sensitization risk assessment. Toxicol Sci 119(2):308–318

    Article  CAS  PubMed  Google Scholar 

  • Díez-Sales O, Copoví A, Casabó VG, Herráez H (1991) A modelistic approach showing the importance of the stagnant aqueous layers in in vitro diffusion studies, and in vitro–in vivo correlations. Int J Pharm 77(1):1–11

    Article  Google Scholar 

  • ECETOC (1993) Monograph 20, percutaneous absorption. European Centre for Ecotoxicology and Toxicology of Chemicals, Brussels

    Google Scholar 

  • Elias PM (1983) Epidermal lipids, barrier function, and desquamation. J Invest Dermatol 80(Suppl):44s–49s

    Article  CAS  Google Scholar 

  • Escobar-Chavez JJ, Merino-Sanjuán V, López-Cervantes M, Urban-Morlan Z, Piñón Segundo E, Quintanar-Guerrero D, Ganem-Quintanar A (2008) The tape–stripping technique as a method for drug quantification in skin. J Pharm Pharm Sci 11(1):104–130

    Article  CAS  PubMed  Google Scholar 

  • Feldmann RJ, Maibach HI (1969) Percutaneous penetration of steroids in man. J Invest Dermatol 52(1):89–94

    Article  CAS  PubMed  Google Scholar 

  • Feldmann RJ, Maibach HI (1974) Percutaneous penetration of some pesticides and herbicides in man. Toxicol Appl Pharmacol 28(1):126–132

    Article  CAS  PubMed  Google Scholar 

  • Fiserova-Bergerova V, Pierce JT, Droz PO (1990) Dermal absorption potential of industrial chemicals: criteria for skin notation. Am J Ind Med 17(5):617–635

    Article  CAS  PubMed  Google Scholar 

  • Fisher HL, Most B, Hall LL (1985) Dermal absorption of pesticides calculated by deconvolution. J Appl Toxicol 5(3):163–177

    Article  CAS  PubMed  Google Scholar 

  • Fitzpatrick D, Corish J, Hayes B (2004) Modelling skin permeability in risk assessment – the future. Chemosphere 55(10):1309–1314

    Article  CAS  PubMed  Google Scholar 

  • Franz TJ, Lehman PA, Raney SG (2009) Use of excised human skin to assess the bioequivalence of topical products. Skin Pharmacol Physiol 22(5):276–286

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  • Franz TJ (1975) Percutaneous absorption. On the relevance of in vitro data. J Invest Dermatol 64(3):190–195

    Article  CAS  PubMed  Google Scholar 

  • Frasch F, Barbero AM (2013) Application of numerical methods for diffusion-based modeling of skin permeation. Adv Drug Deliv Rev 65(2):208–220

    Article  CAS  PubMed  Google Scholar 

  • Frasch HF, Barbero AM (2008) The transient dermal exposure: theory and experimental examples using skin and silicone membranes. J Pharm Sci 97(4):1578–1592

    Article  CAS  PubMed  Google Scholar 

  • Frasch HF, Barbero AM, Hettick JM, Nitsche JM (2011) Tissue binding affects the kinetics of theophylline diffusion through the stratum corneum barrier layer of skin. J Pharm Sci 100(7):2989–2995

    Article  CAS  PubMed  Google Scholar 

  • George K (2005) A two-dimensional mathematical model of non-linear dual-sorption of percutaneous drug absorption. Biomed Eng Online 4:40

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  • Guy RH, Hadgraft J (1982) Percutaneous metabolism with saturable enzyme kinetics. Int J Pharm 11(3):187–197

    Article  CAS  Google Scholar 

  • Guy RH, Hadgraft J (1985) Transdermal drug delivery: a simplified pharmacokinetic approach. Int J Pharm 24(2–3):267–274

    Article  CAS  Google Scholar 

  • Guy RH, Hadgraft J, Bucks DAW (1987) Transdermal drug delivery and cutaneous metabolism. Xenobiotica 17(3):325–343

    Article  CAS  PubMed  Google Scholar 

  • Guy R, Hadgraft J, Maibach H (1982) A pharmacokinetic model for percutaneous absorption. Int J Pharm 11(2):119–129

    Article  CAS  Google Scholar 

  • Hadgraft J (1979) The epidermal reservoir; a theoretical approach. Int J Pharm 2(5–6):265–274

    Article  Google Scholar 

  • Hadgraft J (1980) Theoretical aspects of metabolism in the epidermis. Int J Pharm 4(3):229–239

    Article  CAS  Google Scholar 

  • Hahn T, Selzer D, Neumann D, Kostka KH, Lehr CM, Schaefer UF (2012) Influence of the application area on finite dose permeation in relation to drug type applied. Exp Dermatol 21(3):233–235

    Article  CAS  PubMed  Google Scholar 

  • Hansen S, Henning A, Naegel A, Heisig M, Wittum G, Neumann D, Kostka KH, Zbytovska J, Lehr CM, Schaefer UF (2008) In–silico model of skin penetration based on experimentally determined input parameters. Part i: experimental determination of partition and diffusion coefficients. Eur J Pharm Biopharm 68(2):352–367

    Article  CAS  PubMed  Google Scholar 

  • Hansen S, Naegel A, Heisig M, Wittum G, Neumann D, Kostka KH, Meiers P, Lehr CM, Schaefer U (2009) The role of corneocytes in skin transport revised – a combined computational and experimental approach. Pharm Res 26:1379–1397

    Article  CAS  PubMed  Google Scholar 

  • Hansen S, Lehr CM, Schaefer UF (2013) Improved input parameters for diffusion models of skin absorption. Adv Drug Deliv Rev 65(2):251–264

    Article  CAS  PubMed  Google Scholar 

  • Heisig M, Lieckfeldt R, Wittum G, Mazurkevich G, Lee G (1996) Non steady–state descriptions of drug permeation through stratum corneum. i. The biphasic brick-and-mortar model. Pharm Res 13(3):421–426

    Article  CAS  PubMed  Google Scholar 

  • Henning A, Schaefer UF, Neumann D (2009) Potential pitfalls in skin permeation experiments: influence of experimental factors and subsequent data evaluation. Eur J Pharm Biopharm 72(2):324–331

    Article  CAS  PubMed  Google Scholar 

  • Herkenne C, Naik A, Kalia YN, Hadgraft J, Guy RH (2006) Ibuprofen transport into and through skin from topical formulations: in vitro–in vivo comparison. J Invest Dermatol 127(1):135–142

    Article  PubMed  CAS  Google Scholar 

  • Herkenne C, Naik A, Kalia YN, Hadgraft J, Guy RH (2007) Dermatopharmacokinetic prediction of topical drug bioavailability in vivo. J Invest Dermatol 127(4):887–894

    Article  CAS  PubMed  Google Scholar 

  • Herkenne C, Alberti I, Naik A, Kalia YN, Mathy FX, Préat V, Guy RH (2008) In vivo methods for the assessment of topical drug bioavailability. Pharm Res 25(1):87–103

    Article  CAS  PubMed  Google Scholar 

  • Jones E, Oliphant T, Peterson P (2001) Scipy: open source scientific tools for python

    Google Scholar 

  • Kasting GB (2001) Kinetics of finite dose absorption through skin 1. Vanillylnonanamide. J Pharm Sci 90(2):202–212

    Article  CAS  PubMed  Google Scholar 

  • Krüse J, Golden D, Wilkinson S, Williams F, Kezic S, Corish J (2007) Analysis, interpretation, and extrapolation of dermal permeation data using diffusion–based mathematical models. J Pharm Sci 96(3):682–703

    Article  PubMed  CAS  Google Scholar 

  • Kubota K, Koyama E, Twizell EH (1993) Dual sorption model for the nonlinear percutaneous kinetics of timolol. J Pharm Sci 82(12):1205–1208

    Article  CAS  PubMed  Google Scholar 

  • Kubota K, Dey F, Matar SA, Twizell EH (2002) A repeated–dose model of percutaneous drug absorption. Appl Math Model 26(4):529–544

    Article  Google Scholar 

  • Kubota K (1991) A compartment model for percutaneous drug absorption. J Pharm Sci 80(5):502–504

    Article  CAS  PubMed  Google Scholar 

  • Kurnik RT, Potts RO (1997) Modeling of diffusion and crystal dissolution in controlled release systems. J Control Release 45(3):257–264

    Article  CAS  Google Scholar 

  • Lademann J, Jacobi U, Surber C, Weigmann HJ, Fluhr JW (2009) The tape stripping procedure – evaluation of some critical parameters. Eur J Pharm Biopharm 72(2):317–323

    Article  CAS  PubMed  Google Scholar 

  • Lehman PA, Raney SG, Franz TJ (2011) Percutaneous absorption in man: in vitro-in vivo correlation. Skin Pharmacol Physiol 24(4):224–230

    Google Scholar 

  • Magnusson BM, Anissimov YG, Cross SE, Roberts MS (2004) Molecular size as the main determinant of solute maximum flux across the skin. J Invest Dermatol 122(4):993–999

    Article  CAS  PubMed  Google Scholar 

  • McCarley KD, Bunge AL (2001) Pharmacokinetic models of dermal absorption. J Pharm Sci 90(11):1699–1719

    Article  CAS  PubMed  Google Scholar 

  • McCarley K, Bunge A (2000) Physiologically relevant two-compartment pharmacokinetic models for skin. J Pharm Sci 89(9):1212–1235

    Article  CAS  PubMed  Google Scholar 

  • McKone TE, Howd RA (1992) Estimating dermal uptake of nonionic organic chemicals from water and soil: I. Unified fugacity–based models for risk assessments. Risk Anal 12(4):543–557

    Article  CAS  PubMed  Google Scholar 

  • Melero A, Hahn T, Schaefer U, Schneider M (2011) In vitro human skin segmentation and drug concentration-skin depth profiles. In: Turksen K (ed) Permeability barrier, methods in molecular biology, vol 763. Humana Press, New York City, USA, pp 33–50

    Google Scholar 

  • Michaels AS, Chandrasekaran SK, Shaw JE (1975) Drug permeation through human skin: theory and invitro experimental measurement. AIChE J 21(5):985–996

    Article  CAS  Google Scholar 

  • Muha I, Naegel A, Stichel S, Grillo A, Heisig M, Wittum G (2010) Effective diffusivity in membranes with tetrakaidekahedral cells and implications for the permeability of human stratum corneum. J Membr Sci 368(1–2):18–25

    Google Scholar 

  • Naegel A, Hansen S, Neumann D, Lehr CM, Schaefer UF, Wittum G, Heisig M (2008) In–silico model of skin penetration based on experimentally determined input parameters. Part ii: mathematical modelling of in–vitro diffusion experiments. Identification of critical input parameters. Eur J Pharm Biopharm 68(2):368–379

    Article  CAS  PubMed  Google Scholar 

  • Naegel A, Hahn T, Schaefer U, Lehr CM, Heisig M, Wittum G (2011) Finite dose skin penetration: a comparison of concentration–depth profiles from experiment and simulation. Comput Vis Sci 14(7):327–339

    Article  CAS  Google Scholar 

  • Naegel A, Heisig M, Wittum G (2013) Detailed modeling of skin penetration – an overview. Adv Drug Deliv Rev 65(2):191–207

    Article  CAS  PubMed  Google Scholar 

  • Narkar Y (2010) Bioequivalence for topical products – an update. Pharm Res 27:2590–2601

    Article  CAS  PubMed  Google Scholar 

  • Neumann D, Kohlbacher O, Merkwirth C, Lengauer T (2005) A fully computational model for predicting percutaneous drug absorption. J Chem Inf Model 46(1):424–429

    Article  CAS  Google Scholar 

  • Neumann D (2008) Modeling transdermal absorption. In: Ehrhardt C, Kim KJ (eds) Drug absorption studies, biotechnology: pharmaceutical aspects, vol VII. Springer, US, chap 20, pp 459–485

    Google Scholar 

  • Nitsche JM, Frasch HF (2011) Dynamics of diffusion with reversible binding in microscopically heterogeneous membranes: general theory and applications to dermal penetration. Chem Eng Sci 66(10):2019–2041

    Article  CAS  Google Scholar 

  • OECD (2004a) Guidance document for the conduct of skin absorption studies. OECD Series on Testing and Assessment 28

    Google Scholar 

  • OECD (2004b) Test guideline 428: skin absorption: in vitro method

    Google Scholar 

  • Opdam JJG (1991) Linear systems dynamics in toxicokinetic studies. Ann Occup Hyg 35(6):633–649

    CAS  PubMed  Google Scholar 

  • Patel H, Berge W, Cronin MTD (2002) Quantitative structure-activity relationships (QSARs) for the prediction of skin permeation of exogenous chemicals. Chemosphere 48(6):603–613

    Article  CAS  PubMed  Google Scholar 

  • Potts RO, Guy RH (1992) Predicting skin permeability. Pharm Res 9(5):663–669

    Article  CAS  PubMed  Google Scholar 

  • Reddy MB, Guy RH, Bunge AL (2000a) Does epidermal turnover reduce percutaneous penetration? Pharm Res 17(11):1414–1419

    Article  CAS  PubMed  Google Scholar 

  • Reddy M, McCarley K, Bunge A (2000b) Physiologically relevant one-compartment pharmacokinetic models for skin. 2. Comparison of models when combined with a systemic pharmacokinetic model. J Pharm Sci 87(4):482–490

    Article  Google Scholar 

  • Russell L, Guy R (2009) Measurement and prediction of the rate and extent of drug delivery into and through the skin. Expert Opin Drug Deliv 6(4):355–369

    Article  CAS  PubMed  Google Scholar 

  • van de Sandt JJM, van Burgsteden JA, Cage S, Carmichael PL, Dick I, Kenyon S, Korinth G, Larese F, Limasset JC, Maas WJM, Montomoli L, Nielsen JB, Payan JP, Robinson E, Sartorelli P, Schaller KH, Wilkinson SC, Williams FM (2004) In vitro predictions of skin absorption of caffeine, testosterone, and benzoic acid: a multi–centre comparison study. Regul Toxicol Pharmacol 39(3):271–281

    Article  PubMed  CAS  Google Scholar 

  • Schäfer-Korting M, Bock U, Diembeck W, Düsing HJ, Gamer A, Haltner-Ukomadu E, Hoffmann C, Kaca M, Kamp H, Kersen S, Kietzmann M, Korting HC, Krächter HU, Lehr CM, Liebsch M, Mehling A, Müller-Goymann C, Netzlaff F, Niedorf F, Rübbelke MK, Schaefer U, Schmidt E, Schreiber S, Spielmann H, Vuia A, Weimer M (2008) The use of reconstructed human epidermis for skin absorption testing: results of the validation study. ATLA Altern Lab Anim 36(2):161–187

    PubMed  Google Scholar 

  • Scheuplein RJ, Ross LW (1974) Mechanism of percutaneous absorption. v. Percutaneous absorption of solvent deposited solids. J Invest Dermatol 62(4):353–360

    Article  CAS  PubMed  Google Scholar 

  • Scheuplein RJ (1967) Mechanism of percutaneous absorption. ii. Transient diffusion and the relative importance of various routes of skin penetration. J Invest Dermatol 48(1):79–88

    Article  CAS  PubMed  Google Scholar 

  • Selzer D, Abdel-Mottaleb M, Hahn T, Schaefer UF, Neumann D (2013a) Finite and infinite dosing: difficulties in measurements, evaluations and predictions. Adv Drug Deliv Rev 65(2):278–294

    Article  CAS  PubMed  Google Scholar 

  • Selzer D, Hahn T, Naegel A, Heisig M, Kostka KH, Lehr CM, Neumann D, Schaefer UF, Wittum G (2013b) Finite dose skin mass balance including the lateral part: comparison between experiment, pharmacokinetic modeling and diffusion models. J Control Release 165(2):119–128

    Article  CAS  PubMed  Google Scholar 

  • Seta Y, Ghanem AH, Higuchi WI, Borsadia S, Behl CR, Malick AW (1992) Physical model approach to understanding finite dose transport and uptake of hydrocortisone in hairless guinea–pig skin. Int J Pharm 81(1):89–99

    Article  CAS  Google Scholar 

  • Shah VP, Flynn GL, Yacobi A, Maibach HI, Bon C, Fleischer NM, Franz TJ, Kaplan SA, Kawamoto J, Lesko LJ, Marty JP, Pershing LK, Schaefer H, Sequeira JA, Shrivastava SP, Wilkin J, Williams RL (1998) AAPS/FDA Workshop report: bioequivalence of topical dermatological dosage forms: methods of evaluation of bioequivalence, vol 22. Advanstar Communications, Duluth

    Google Scholar 

  • Simon L, Goyal A (2009) Dynamics and control of percutaneous drug absorption in the presence of epidermal turnover. J Pharm Sci 98(1):187–204

    Article  CAS  PubMed  Google Scholar 

  • Sloan KB, Wasdo SC, Rautio J (2006) Design for optimized topical delivery: prodrugs and a paradigm change. Pharm Res 23(12):2729–2747

    Article  CAS  PubMed  Google Scholar 

  • Stinchcomb AL, Pirot F, Touraille GD, Bunge AL (1999) Chemical uptake into human stratum corneum in vivo from volatile and non–volatile solvents. Pharm Res 16(8):1288–1293

    Article  CAS  PubMed  Google Scholar 

  • Talreja PS, Kasting GB, Kleene NK, Pickens WL, Wang TF (2001) Visualization of the lipid barrier and measurement of lipid pathlength in human stratum corneum. AAPS PharmSci 3(2):48–56

    Article  PubMed Central  Google Scholar 

  • Treffel P, Gabard B (1996) Skin penetration and sun protection factor of ultra-violet filters from two vehicles. Pharm Res 13:770–774

    Article  CAS  PubMed  Google Scholar 

  • Vaughan DP, Dennis M (1978) Mathematical basis of point-area deconvolution method for determining in vivo input functions. J Pharm Sci 67(5):663–665

    Article  CAS  PubMed  Google Scholar 

  • Wagner H, Kostka KH, Lehr CM, Schaefer UF (2000) Drug distribution in human skin using two different in vitro test systems: comparison with in vivo data. Pharm Res 17(12):1475–1481

    Article  CAS  PubMed  Google Scholar 

  • Wagner H, Kostka KH, Lehr CM, Schaefer UF (2002) Human skin penetration of flufenamic acid: in vivo/in vitro correlation (deeper skin layers) for skin samples from the same subject. J Invest Dermatol 118(3):540–544

    Article  CAS  PubMed  Google Scholar 

  • Wallace SM, Barnett G (1978) Pharmacokinetic analysis of percutaneous absorption: evidence of parallel penetration pathways for methotrexate. J Pharmacokinet Biopharm 6(4):315–325

    Article  CAS  PubMed  Google Scholar 

  • Wearley LL, Tojo K, Chien YW (1990) A numerical approach to study the effect of binding on the lontophoretic transport of a series of amino acids. J Pharm Sci 79(11):992–998

    Article  CAS  PubMed  Google Scholar 

  • Wester RC, Maibach HI (1976) Relationship of topical dose and percutaneous absorption in rhesus monkey and man. J Invest Dermatol 67(4):518–520

    Article  CAS  PubMed  Google Scholar 

  • Wilkinson SC, Maas WJM, Nielsen JB, Greaves LC, Sandt JJM, Williams FM (2006) Interactions of skin thickness and physicochemical properties of test compounds in percutaneous penetration studies. Int Arch Occup Environ Health 79(5):405–413

    Article  CAS  PubMed  Google Scholar 

  • Wilschut A, ten Berge WF, Robinson PJ, McKone TE (1995) Estimating skin permeation. The validation of five mathematical skin permeation models. Chemosphere 30(7):1275–1296

    Article  CAS  PubMed  Google Scholar 

  • Zhang Q, Li P, Roberts MS (2011) Maximum transepidermal flux for similar size phenolic compounds is enhanced by solvent uptake into the skin. J Control Release 154(1):50–57

    Article  CAS  PubMed  Google Scholar 

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Selzer, D., Schaefer, U.F., Lehr, CM., Hansen, S. (2017). Basic Mathematics in Skin Absorption. In: Dragicevic, N., I. Maibach, H. (eds) Percutaneous Penetration Enhancers Drug Penetration Into/Through the Skin. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-53270-6_1

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