The effect of heat on skin permeability

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dc.contributor.authorPark, Jung-Hwanko
dc.contributor.authorLee, Jeong-Wooko
dc.contributor.authorKim, Yeu-Chunko
dc.contributor.authorPrausnitz, Mark R.ko
dc.date.accessioned2013-03-08T13:32:27Z-
dc.date.available2013-03-08T13:32:27Z-
dc.date.created2012-06-21-
dc.date.created2012-06-21-
dc.date.issued2008-07-
dc.identifier.citationINTERNATIONAL JOURNAL OF PHARMACEUTICS, v.359, no.1-2, pp.94 - 103-
dc.identifier.issn0378-5173-
dc.identifier.urihttp://hdl.handle.net/10203/93141-
dc.description.abstractAlthough the effects of long exposure (>> 1 s) to moderate temperatures (<= 100 degrees C)have been well characterized, recent studies suggest that shorter exposure (<1 s) to higher temperatures (>100 degrees C) can dramatically increase skin permeability. Previous studies suggest that by keeping exposures short, thermal damage can be localized to the stratum corneum without damaging deeper tissue. Initial clinical trials have progressed to Phase II (see http://clinicaltrials.gov), which indicates the procedure can be safe. Because the effect of heating under these conditions has received little systematic or mechanistic study, we heated full-thickness skin, epidermis and stratum corneum samples from human and porcine cadavers to temperatures ranging from 100 to 315 degrees C for times ranging from 100 ms to 5 s. Tissue samples were analyzed using skin permeability measurements, differential scanning calorimetry, thermomechanical analysis, thermal gravimetric analysis, brightfield and confocal microscopy, and histology. Skin permeability was shown to be a very strong function of temperature and a less strong function of the duration of heating. At optimal conditions used in this study, transdermal delivery of calcein was increased up to 760-fold by rapidly heating the skin at high temperature. More specifically, skin permeability was increased (I) by a few fold after heating to approximately 100-150 degrees C, (II) by one to two orders of magnitude after heating to approximately 150-250 degrees C and (III) by three orders of magnitude after heating above 300 degrees C. These permeability changes were attributed to (1) disordering of stratum corneum lipid structure, (II) disruption of stratum corneum keratin network structure and (III) decomposition and vaporization of keratin to create micron-scale holes in the stratum corneum, respectively. We conclude that heating the skin with short, high temperature pulses can increase skin permeability by orders of magnitude due to structural disruption and removal of stratum corneum. (C) 2008 Elsevier B.V. All rights reserved.-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE BV-
dc.subjectTRANSDERMAL DRUG-DELIVERY-
dc.subjectDIFFERENTIAL SCANNING CALORIMETRY-
dc.subjectSTRATUM-CORNEUM-
dc.subjectYAG LASER-
dc.subjectTRANSPORT-
dc.subjectABLATION-
dc.subjectMACROMOLECULES-
dc.subjectMICROCHANNELS-
dc.subjectMICROPORATION-
dc.subjectMICRONEEDLES-
dc.titleThe effect of heat on skin permeability-
dc.typeArticle-
dc.identifier.wosid000257530400012-
dc.identifier.scopusid2-s2.0-44749093959-
dc.type.rimsART-
dc.citation.volume359-
dc.citation.issue1-2-
dc.citation.beginningpage94-
dc.citation.endingpage103-
dc.citation.publicationnameINTERNATIONAL JOURNAL OF PHARMACEUTICS-
dc.identifier.doi10.1016/j.ijpharm.2008.03.032-
dc.contributor.localauthorKim, Yeu-Chun-
dc.contributor.nonIdAuthorPark, Jung-Hwan-
dc.contributor.nonIdAuthorLee, Jeong-Woo-
dc.contributor.nonIdAuthorPrausnitz, Mark R.-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorskin permeability-
dc.subject.keywordAuthorthermal effect-
dc.subject.keywordAuthortransdermal drug delivery-
dc.subject.keywordPlusTRANSDERMAL DRUG-DELIVERY-
dc.subject.keywordPlusDIFFERENTIAL SCANNING CALORIMETRY-
dc.subject.keywordPlusSTRATUM-CORNEUM-
dc.subject.keywordPlusYAG LASER-
dc.subject.keywordPlusTRANSPORT-
dc.subject.keywordPlusABLATION-
dc.subject.keywordPlusMACROMOLECULES-
dc.subject.keywordPlusMICROCHANNELS-
dc.subject.keywordPlusMICROPORATION-
dc.subject.keywordPlusMICRONEEDLES-
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