Abstract
In vitro skin absorption studies are essential for dermal product development as well as in dermal risk assessment. This chapter introduces commonly used membranes for permeation and penetration studies, such as from human, animal, bioengineered, or artificial sources. In addition two basic types of experiments to investigate transdermal solute transport are discussed. In permeation studies, the substance transport through the skin is evaluated and systemic availability is addressed. In contrast penetration studies gain information on substance distribution in different skin layers, allowing the identification of substance depots in various skin layers. Furthermore, basic experimental setups for skin transport studies are addressed, e.g., finite and infinite dosing, vertical and horizontal diffusion cells, and static versus flow-through cells. Furthermore, the influence of fundamental experimental conditions on diffusion experiments, such as the choice of acceptor solution and temperature, are discussed.
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Abbreviations
- Css:
-
Saturation concentration of solute in the vehicle
- Cv:
-
Concentration in the vehicle
- EC:
-
European Commission
- ECETOC:
-
European Centre for Ecotoxicology and Toxicology of Chemicals
- EDETOX:
-
Evaluations and predictions of dermal absorption of toxic chemicals
- EEC:
-
European Economic Community
- EFSA:
-
European Food Safety Authority
- HaCaT:
-
Human adult low calcium high temperature keratinocytes
- HPLC:
-
High-performance liquid chromato-graphy
- Jpeak :
-
Peak flux
- Jss :
-
Steady state flux
- Jss(max) :
-
Maximum flux
- LC:
-
Liquid chromatography
- KP :
-
Apparent permeability coefficient
- MS:
-
Mass spectrometry
- NAFTA:
-
North American Free Trade Agreement
- REACH:
-
Registration, Evaluation, Authorisation and Restriction of Chemicals
- SC:
-
Stratum corneum
- SCCNFP:
-
Scientific Committee on Cosmetic Products and Non-Food Products
- SCCS:
-
Scientific Committee on Consumer Safety
- TEWL:
-
Transepidermal water loss
- tlag :
-
Lag-time
- USEPA:
-
US Environmental Protection Agency
- WHO:
-
World Health Organisation
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Schaefer, U.F., Selzer, D., Hansen, S., Lehr, CM. (2017). Human Native and Reconstructed Skin Preparations for In Vitro Penetration and Permeation Studies. 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_10
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