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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evaluation of critical parameters for in vitro skin permeation and penetration studies using animal skin models

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Author(s):
Garcia Praca, Fabiola Silva [1] ; Garcia Medina, Wanessa Silva [2] ; Eloy, Josimar O. [1, 3] ; Petrilli, Raquel [1] ; Campos, Patricia Mazureki [1] ; Ascenso, Andreia [4] ; Bentley, Maria Vitoria L. B. [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Sch Pharmaceut Sci Ribeirao Preto, Ave Cafe S-N, BR-1404000 Ribeirao Preto, SP - Brazil
[2] FIPA, Catanduva, SP - Brazil
[3] UNESP Sao Paulo State Univ, Sch Pharmaceut Sci, Dept Drugs & Med, Campus Araraquara, Rodovia Araraquara Jau, Km 1, BR-14801902 Araraquara, SP - Brazil
[4] Univ Lisbon, Res Inst Med iMed ULisboa, Fac Farm, Lisbon - Portugal
Total Affiliations: 4
Document type: Journal article
Source: European Journal of Pharmaceutical Sciences; v. 111, p. 121-132, JAN 1 2018.
Web of Science Citations: 17
Abstract

In vitro skin permeation/penetration studies may be affected by many sources of variation. Herein, we aimed to investigate the major critical procedures of in vitro skin delivery studies. These experiments were performed with model drugs according to official guidelines. The influence of skin source on penetration studies was studied as well as the use of a cryopreservation agent on skin freezing evaluated by transepidermal water loss, electrical resistance, permeation/penetration profiles and histological changes of the skin. The best condition for tape stripping procedure was validated through the evaluation of the distribution of corneocytes, mass of stratum corneum (SC) removed and amount of protein removed using finger pressure, a 2 kg weight and a roller. The interchangeability of the tape stripping procedures followed by the epidermis and dermis homogenate and the micrometric horizontal cryostat skin sectioning methods were also investigated, besides the effect of different formulations. Noteworthy, different skin sources were able to ensure reliable interchangeability for in vitro permeation studies. Furthermore, an increased penetration was obtained for stored frozen skin compared to fresh skin, even with the addition of a cryoprotectant agent. The best method for tape stripping was the finger pressure followed by the addition of a propylene glycol solvent leading to better SC removal. Finally, no significant difference was found in skin penetration studies performed by different methods suggesting their possible interchangeability. (AU)