1
|
Kahsay BN, Moeller L, Wohlrab J, Neubert RHH, Gebre-Mariam T. Delivery of small hydrophilic molecules across the stratum corneum: Identification of model systems and parameters to study topical delivery of free amino acids. Int J Pharm 2024; 661:124372. [PMID: 38909923 DOI: 10.1016/j.ijpharm.2024.124372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 06/25/2024]
Abstract
Free amino acids (FAAs) constitute the largest component (∼40 %) of the so-called natural moisturizing factors of the skin. Their level declines in dry skin conditions and one strategy to overcome this problem may involve the topical delivery of FAAs through appropriate strategy. The objective of the present study was therefore to identify alternative skin models and study the corneocyte-water partition coefficients (KCOR/W) and permeation coefficient (KP) of 18 FAAs. The KCOR/W was studied using standard protocols and the permeation studies were conducted using Franz diffusion cell. The results indicate that the FAAs have high partitioning behavior to the corneocytes. The KCOR/W values of the human COR and that of pig ear skin were better correlated with each other than that of keratin isolated from chicken feathers. The presence of lipid in the stratum corneum (SC), initial concentration of the FAAs, and permeation enhancers affect the KCOR/W. The FAAs have low permeation into the SC which suggests the need for permeation enhancers in designing dosage form containing these compounds. Even though the investigated mathematical models show good prediction of the Kp values, better prediction could be obtained by considering factors such as the possible entrapment of the FAAs by the CORs.
Collapse
Affiliation(s)
- Birhanu Nigusse Kahsay
- Institute of Applied Dermatopharmacy, Martin Luther University Halle-Wittenberg, Weinbergweg 23 06120, Halle (Saale), Germany; Department of Biopharmaceutics & Pharmaceutical Technology, Institute of Pharmaceutical & Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5 D-55099, Mainz, Germany
| | - Lucie Moeller
- Department of Systemic Environmental Biotechnology, Helmholtz Centre for Environmental Research, Permoserstrasse 15 04318, Leipzig, Germany
| | - Johannes Wohlrab
- Department of Dermatology and Venereology, Martin Luther University Halle-Wittenberg, Ernst-Grube-Str. 40 06120, Halle (Saale), Germany
| | - Reinhard H H Neubert
- Institute of Applied Dermatopharmacy, Martin Luther University Halle-Wittenberg, Weinbergweg 23 06120, Halle (Saale), Germany.
| | - Tsige Gebre-Mariam
- Department of Pharmaceutics and Social Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, P.O. Box 9086, Addis Ababa, Ethiopia.
| |
Collapse
|
2
|
Lischetti U, Tastanova A, Singer F, Grob L, Carrara M, Cheng PF, Martínez Gómez JM, Sella F, Haunerdinger V, Beisel C, Levesque MP. Dynamic thresholding and tissue dissociation optimization for CITE-seq identifies differential surface protein abundance in metastatic melanoma. Commun Biol 2023; 6:830. [PMID: 37563418 PMCID: PMC10415364 DOI: 10.1038/s42003-023-05182-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 07/26/2023] [Indexed: 08/12/2023] Open
Abstract
Multi-omics profiling by CITE-seq bridges the RNA-protein gap in single-cell analysis but has been largely applied to liquid biopsies. Applying CITE-seq to clinically relevant solid biopsies to characterize healthy tissue and the tumor microenvironment is an essential next step in single-cell translational studies. In this study, gating of cell populations based on their transcriptome signatures for use in cell type-specific ridge plots allowed identification of positive antibody signals and setting of manual thresholds. Next, we compare five skin dissociation protocols by taking into account dissociation efficiency, captured cell type heterogeneity and recovered surface proteome. To assess the effect of enzymatic digestion on transcriptome and epitope expression in immune cell populations, we analyze peripheral blood mononuclear cells (PBMCs) with and without dissociation. To further assess the RNA-protein gap, RNA-protein we perform codetection and correlation analyses on thresholded protein values. Finally, in a proof-of-concept study, using protein abundance analysis on selected surface markers in a cohort of healthy skin, primary, and metastatic melanoma we identify CD56 surface marker expression on metastatic melanoma cells, which was further confirmed by multiplex immunohistochemistry. This work provides practical guidelines for processing and analysis of clinically relevant solid tissue biopsies for biomarker discovery.
Collapse
Affiliation(s)
- Ulrike Lischetti
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058, Basel, Switzerland
- Department of Biomedicine, University Hospital Basel, University of Basel, 4031, Basel, Switzerland
| | - Aizhan Tastanova
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
| | - Franziska Singer
- ETH Zurich, NEXUS Personalized Health Technologies, Wagistrasse 18, 8952, Schlieren, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Linda Grob
- ETH Zurich, NEXUS Personalized Health Technologies, Wagistrasse 18, 8952, Schlieren, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Matteo Carrara
- ETH Zurich, NEXUS Personalized Health Technologies, Wagistrasse 18, 8952, Schlieren, Switzerland
- SIB Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Phil F Cheng
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Julia M Martínez Gómez
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Federica Sella
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Veronika Haunerdinger
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Christian Beisel
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058, Basel, Switzerland
| | - Mitchell P Levesque
- Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
| |
Collapse
|
3
|
Polito MP, Marini G, Palamenghi M, Enzo E. Decoding the Human Epidermal Complexity at Single-Cell Resolution. Int J Mol Sci 2023; 24:ijms24108544. [PMID: 37239891 DOI: 10.3390/ijms24108544] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 04/27/2023] [Accepted: 05/04/2023] [Indexed: 05/28/2023] Open
Abstract
The epidermis is one of the largest tissues in the human body, serving as a protective barrier. The basal layer of the epidermis, which consists of epithelial stem cells and transient amplifying progenitors, represents its proliferative compartment. As keratinocytes migrate from the basal layer to the skin surface, they exit the cell cycle and initiate terminal differentiation, ultimately generating the suprabasal epidermal layers. A deeper understanding of the molecular mechanisms and pathways driving keratinocytes' organization and regeneration is essential for successful therapeutic approaches. Single-cell techniques are valuable tools for studying molecular heterogeneity. The high-resolution characterization obtained with these technologies has identified disease-specific drivers and new therapeutic targets, further promoting the advancement of personalized therapies. This review summarizes the latest findings on the transcriptomic and epigenetic profiling of human epidermal cells, analyzed from human biopsy or after in vitro cultivation, focusing on physiological, wound healing, and inflammatory skin conditions.
Collapse
Affiliation(s)
- Maria Pia Polito
- Centre for Regenerative Medicine ''Stefano Ferrari'', University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Grazia Marini
- Centre for Regenerative Medicine ''Stefano Ferrari'', University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Michele Palamenghi
- Centre for Regenerative Medicine ''Stefano Ferrari'', University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Elena Enzo
- Centre for Regenerative Medicine ''Stefano Ferrari'', University of Modena and Reggio Emilia, 41125 Modena, Italy
| |
Collapse
|
4
|
Cichoń MA, Elbe-Bürger A. Epidermal/Dermal Separation Techniques and Analysis of Cell Populations in Human Skin Sheets. J Invest Dermatol 2023; 143:11-17.e8. [PMID: 36528357 DOI: 10.1016/j.jid.2022.10.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/29/2022] [Accepted: 10/21/2022] [Indexed: 12/23/2022]
Abstract
Human skin consists of three compartments, each endowed with a particular structure and the presence of several immune and nonimmune cells that together comprise a protective shield and orchestrate multiple processes in the skin. Appropriate processing of human skin samples acquired from healthy volunteers or patients is essential for successful analysis in basic, translational, and clinical research to obtain accurate and reliable results, despite differences between individuals. From the wide range of available assays and methods, it is necessary to select the suitable method for separation of skin compartments, which will provide preservation or high viability of skin cells or whole structures that will be analyzed or further processed. In this paper, we review and discuss skin separation methods and compare their features such as processing time, cell viability, location of the basement membrane after detachment of the epidermis from the dermis, and their application. Furthermore, we visualize different cell populations and structures in epidermal and dermal sheets using confocal microscopy. It is aimed to provide an overview of the optimal processing of human skin samples and their possible application.
Collapse
|
5
|
Burja B, Paul D, Tastanova A, Edalat SG, Gerber R, Houtman M, Elhai M, Bürki K, Staeger R, Restivo G, Lang R, Sodin-Semrl S, Lakota K, Tomšič M, Levesque MP, Distler O, Rotar Ž, Robinson MD, Frank-Bertoncelj M. An Optimized Tissue Dissociation Protocol for Single-Cell RNA Sequencing Analysis of Fresh and Cultured Human Skin Biopsies. Front Cell Dev Biol 2022; 10:872688. [PMID: 35573685 PMCID: PMC9096112 DOI: 10.3389/fcell.2022.872688] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 04/13/2022] [Indexed: 12/16/2022] Open
Abstract
We present an optimized dissociation protocol for preparing high-quality skin cell suspensions for in-depth single-cell RNA-sequencing (scRNA-seq) analysis of fresh and cultured human skin. Our protocol enabled the isolation of a consistently high number of highly viable skin cells from small freshly dissociated punch skin biopsies, which we use for scRNA-seq studies. We recapitulated not only the main cell populations of existing single-cell skin atlases, but also identified rare cell populations, such as mast cells. Furthermore, we effectively isolated highly viable single cells from ex vivo cultured skin biopsy fragments and generated a global single-cell map of the explanted human skin. The quality metrics of the generated scRNA-seq datasets were comparable between freshly dissociated and cultured skin. Overall, by enabling efficient cell isolation and comprehensive cell mapping, our skin dissociation-scRNA-seq workflow can greatly facilitate scRNA-seq discoveries across diverse human skin pathologies and ex vivo skin explant experimentations.
Collapse
Affiliation(s)
- Blaž Burja
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Dominique Paul
- Department of Molecular Life Sciences and Swiss Institute of Bioinformatics, University of Zurich, Zurich, Switzerland
| | - Aizhan Tastanova
- Department of Dermatology, University of Zurich, University Hospital Zurich, Schlieren, Switzerland
| | - Sam G. Edalat
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Reto Gerber
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Department of Molecular Life Sciences and Swiss Institute of Bioinformatics, University of Zurich, Zurich, Switzerland
| | - Miranda Houtman
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Muriel Elhai
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Kristina Bürki
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Ramon Staeger
- Department of Dermatology, University of Zurich, University Hospital Zurich, Schlieren, Switzerland
| | - Gaetana Restivo
- Department of Dermatology, University of Zurich, University Hospital Zurich, Schlieren, Switzerland
| | - Ramon Lang
- Department of Dermatology, University of Zurich, University Hospital Zurich, Schlieren, Switzerland
| | - Snezna Sodin-Semrl
- Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Katja Lakota
- Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Matija Tomšič
- Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Mitchell P. Levesque
- Department of Dermatology, University of Zurich, University Hospital Zurich, Schlieren, Switzerland
| | - Oliver Distler
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Žiga Rotar
- Department of Rheumatology, University Medical Centre Ljubljana, Ljubljana, Slovenia
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Mark D. Robinson
- Department of Molecular Life Sciences and Swiss Institute of Bioinformatics, University of Zurich, Zurich, Switzerland
| | - Mojca Frank-Bertoncelj
- Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
- BioMed X Institute, Heidelberg, Germany
- *Correspondence: Mojca Frank-Bertoncelj,
| |
Collapse
|