5d14c5266751590bf324f82e64b92e7b 303443.pdf cbf93121900aee39ba5f7f41dbb6ed37c70a3dab 303443.pdf 1224478c42e4e8aa9320a689b46457c39e82eec067ec69a0664d665ba0c569f2 303443.pdf Title: Development and validation of a minimally invasive and image-guided tape stripping method to sample atopic skin in children Subject: DOI: 10.1093/ced/llac040; Clinical and Experimental Dermatology, , --.; Abstract Background. Molecular skin profiling techniques, typically performed on skin samples taken by punch biopsy, have enhanced the understanding of the pathophysiology of atopic dermatitis (AD), thereby enabling the development of novel targeted therapeutics. However, punch biopsies are not always feasible or desirable, and novel minimally invasive methods such as skin tape stripping have been developed. Aim. To develop, optimize and validate a novel tape stripping method guided by noninvasive in vivo skin imaging to sample atopic skin in children. Methods. Skin tape stripping-based procedures were compared and optimized using data from 30 healthy controls (HCs: 5 adults, 25 children) and 39 atopic children. Evaluations were guided by high-resolution photography, reflectance confocal microscopy, optical coherence tomography and transepidermal water loss measurements. We assessed and compared adverse events (AEs), the time needed to perform the sampling and the cDNA levels obtained from the tapes. Results. Tape stripping methods based on previously described protocols resulted in erosions in all participants and required a median time of 65 min to perform (range 60–70 min), but provided good cDNA yield. Shorter durations appeared less invasive but provided lower cDNA yield. The final optimized tape stripping protocol, using 11 tapes of 22 mm in diameter, each applied twice for 5 s with 90° rotation, did not produce significant AEs, was completed within a median time of 7 min (range 5–15 min) and provided good cDNA yield both in HCs and atopic children. Conclusion. Our minimally invasive method is safe and reliable, and provides reproducible acquisition of cDNA in atopic children. In addition, it enables rapid sample collection, a crucial factor in clinical practice. Author: O. Yélamos; D. Andersen; M. Pont; P. Iglesias; M. Potrony; M. Domínguez; A. Herrero; B. Alejo; J. Mateu; M. Røpke; N. B. Danneskiold-Samsøe; J. Malvehy; R. H. Guy; S. Brix; S. Puig Creator: Adobe InDesign 16.2 (Windows) Producer: Adobe PDF Library 15.0; modified using iTextSharp 4.1.6 by 1T3XT CreationDate: Wed Feb 1 05:59:09 2023 CET ModDate: Fri Nov 22 08:13:45 2024 CET Custom Metadata: no Metadata Stream: yes Tagged: yes UserProperties: no Suspects: no Form: none JavaScript: no Pages: 9 Encrypted: no Page size: 595.276 x 782.362 pts Page rot: 0 File size: 2177627 bytes Optimized: no PDF version: 1.4 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- NTWUTO+UniversLTStd-LightObl Type 1C Custom yes yes yes 50 0 NDAZTO+UniversLTStd-Light Type 1C Custom yes yes yes 27 0 MRNYFQ+UniversLTStd-Bold Type 1C Custom yes yes yes 30 0 YDRCGS+UniversLTStd-BoldCn Type 1C WinAnsi yes yes yes 900 0 IQTFBY+UniversLTStd-Cn Type 1C Custom yes yes yes 901 0 ZSFDFQ+UniversLTStd-CnObl Type 1C WinAnsi yes yes yes 902 0 TQEJHW+ArialMT TrueType WinAnsi yes yes no 1 0 FPTYLE+EuclidSymbol CID TrueType Identity-H yes yes yes 31 0 YDRCGS+UniversLTStd-BoldCn Type 1C WinAnsi yes yes yes 951 0 EYHNXG+UniversLTStd-Obl Type 1C WinAnsi yes yes yes 28 0 AFGUTO+UniversLTStd Type 1C Custom yes yes yes 29 0 RCTNXG+UniversLTStd-BoldObl Type 1C Custom yes yes yes 51 0 Jhove (Rel. 1.28.0, 2023-05-18) Date: 2024-11-23 02:45:44 CET RepresentationInformation: 303443.pdf ReportingModule: PDF-hul, Rel. 1.12.4 (2023-03-16) LastModified: 2024-11-22 09:18:56 CET Size: 2177627 Format: PDF Version: 1.4 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf Profile: Tagged PDF PDFMetadata: Objects: 955 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: ViewerPreferences: HideToolbar: false HideMenubar: false HideWindowUI: false FitWindow: false CenterWindow: false DisplayDocTitle: false NonFullScreenPageMode: UseNone Direction: L2R ViewArea: CropBox ViewClip: CropBox PrintArea: CropBox PageClip: CropBox PageLayout: SinglePage PageMode: UseNone Language: en-US Outlines: Item: Title: Development and validation of a minimally invasive and image-guided tape stripping method to sample atopic skin in children Children: Item: Title: Introduction Item: Title: Methods Children: Item: Title: Clinical evaluation Item: Title: Tape stripping procedure Item: Title: Noninvasive in vivo imaging and transepidermal water loss assessment Item: Title: RNA extraction and cDNA library preparation Item: Title: Statistical analysis Children: Item: Title: Demographic and clinical results Item: Title: Noninvasive in vivo assessment Item: Title: Molecular results Item: Title: Results Children: Item: Title: Phase 1b: method optimization in healthy children Children: Item: Title: Demographic and clinical results Item: Title: Noninvasive in vivo assessment Item: Title: Molecular results Item: Title: Phase 1c: Method validation on healthy paediatric participants Children: Item: Title: Demographic and clinical results Item: Title: Noninvasive in vivo assessment Item: Title: Molecular results Item: Title: Phase 2: Method validation on atopic dermatitis paediatric patients Children: Item: Title: Noninvasive in vivo assessment Item: Title: Molecular results Item: Title: Discussion Item: Title: Conclusion Item: Title: What is already known about this topic? Item: Title: What does this study add? Children: Item: Title: Acknowledgements Item: Title: Conflict of interest Item: Title: Funding Item: Title: Ethics statement Item: Title: Data availability Item: Title: References Item: Title: Supporting Information Info: Title: Development and validation of a minimally invasive and image-guided tape stripping method to sample atopic skin in children Author: O. Yélamos; D. Andersen; M. Pont; P. Iglesias; M. Potrony; M. Domínguez; A. Herrero; B. Alejo; J. Mateu; M. Røpke; N. B. Danneskiold-Samsøe; J. Malvehy; R. H. Guy; S. Brix; S. Puig Subject: DOI: 10.1093/ced/llac040; Clinical and Experimental Dermatology, , --.; Abstract Background. Molecular skin profiling techniques, typically performed on skin samples taken by punch biopsy, have enhanced the understanding of the pathophysiology of atopic dermatitis (AD), thereby enabling the development of novel targeted therapeutics. However, punch biopsies are not always feasible or desirable, and novel minimally invasive methods such as skin tape stripping have been developed. Aim. To develop, optimize and validate a novel tape stripping method guided by noninvasive in vivo skin imaging to sample atopic skin in children. Methods. Skin tape stripping-based procedures were compared and optimized using data from 30 healthy controls (HCs: 5 adults, 25 children) and 39 atopic children. Evaluations were guided by high-resolution photography, reflectance confocal microscopy, optical coherence tomography and transepidermal water loss measurements. We assessed and compared adverse events (AEs), the time needed to perform the sampling and the cDNA levels obtained from the tapes. Results. Tape stripping methods based on previously described protocols resulted in erosions in all participants and required a median time of 65 min to perform (range 60–70 min), but provided good cDNA yield. Shorter durations appeared less invasive but provided lower cDNA yield. The final optimized tape stripping protocol, using 11 tapes of 22 mm in diameter, each applied twice for 5 s with 90° rotation, did not produce significant AEs, was completed within a median time of 7 min (range 5–15 min) and provided good cDNA yield both in HCs and atopic children. Conclusion. Our minimally invasive method is safe and reliable, and provides reproducible acquisition of cDNA in atopic children. In addition, it enables rapid sample collection, a crucial factor in clinical practice. 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Yélamos; D. Andersen; M. Pont; P. Iglesias; M. Potrony; M. Domínguez; A. Herrero; B. Alejo; J. Mateu; M. Røpke; N. B. Danneskiold-Samsøe; J. Malvehy; R. H. Guy; S. Brix; S. Puig DOI: 10.1093/ced/llac040; Clinical and Experimental Dermatology, , --.; Abstract Background. Molecular skin profiling techniques, typically performed on skin samples taken by punch biopsy, have enhanced the understanding of the pathophysiology of atopic dermatitis (AD), thereby enabling the development of novel targeted therapeutics. However, punch biopsies are not always feasible or desirable, and novel minimally invasive methods such as skin tape stripping have been developed. Aim. To develop, optimize and validate a novel tape stripping method guided by noninvasive in vivo skin imaging to sample atopic skin in children. Methods. Skin tape stripping-based procedures were compared and optimized using data from 30 healthy controls (HCs: 5 adults, 25 children) and 39 atopic children. Evaluations were guided by high-resolution photography, reflectance confocal microscopy, optical coherence tomography and transepidermal water loss measurements. We assessed and compared adverse events (AEs), the time needed to perform the sampling and the cDNA levels obtained from the tapes. Results. Tape stripping methods based on previously described protocols resulted in erosions in all participants and required a median time of 65 min to perform (range 60–70 min), but provided good cDNA yield. Shorter durations appeared less invasive but provided lower cDNA yield. The final optimized tape stripping protocol, using 11 tapes of 22 mm in diameter, each applied twice for 5 s with 90° rotation, did not produce significant AEs, was completed within a median time of 7 min (range 5–15 min) and provided good cDNA yield both in HCs and atopic children. Conclusion. Our minimally invasive method is safe and reliable, and provides reproducible acquisition of cDNA in atopic children. In addition, it enables rapid sample collection, a crucial factor in clinical practice. Oxford University Press © The Author(s) 2022. Published by Oxford University Press on behalf of British Association of Dermatologists. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. 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