The objective of this work was to compare the barrier function of the small diameter reconstructed human epidermis model Episkin (d=12 mm) to human skin in vitro. For that purpose a modification for the Franz diffusion cell (d=15mm) had to be developed so as to allow direct comparison with the following human skin preparations: Full thickness skin (FTS), split thickness skin (STS), heat-separated epidermis (HSE), and trypsin isolated stratum corneum (TISC). Among the tested preparations, HSE appeared to be the most preferable due to its clear morphological structure and ease of preparation. The lipid profile of HSE and Episkin was analyzed and showed significant differences in terms of cholesterol, ceramides and triglycerides contents, whereas cholesterol esters and fatty acids were not different. Permeation data with HSE and Episkin were then gathered using caffeine and testosterone. Both test compounds permeated much faster through Episkin than through HSE. Moreover, opposed to Episkin, HSE differentiated between the two test compounds. In spite of the remarkable progress in developing RHEs in the past years at this time Episkin can obviously not yet fully replace human skin for in vitro permeability experiments.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ejpb.2006.08.012 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
"High specificity of PCR in diagnosing mucocutaneous leshminiasis: a systematic review and meta analysis".
BMC Infect Dis
December 2024
Department of Community Health Sciences, Aga Khan University, Karachi, Pakistan.
Background: Mucocutaneous leishmaniasis (MCL) is a severe form of leishmaniasis causing chronic and destructive lesions. Accurate diagnosis is crucial for effective treatment. Traditional methods, such as the Montenegro skin test is delayed hypersensitivity test.
View Article and Find Full Text PDFUpregulation of TLR2 in keratinocytes activates the MAPK pathway and plays a role in the pathogenesis of hidradenitis suppurativa.
J Dermatol Sci
November 2024
Department of Dermatology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. Electronic address:
Background: Mutations in gamma-secretase complex (GSC) genes are associated with hidradenitis suppurativa (HS), and toll-like receptor (TLR) 2 is elevated in HS lesions. However, it remains unclear whether TLR2 is upregulated in the skin lesions of patients with HS with GSC gene variants, and the role of its upregulation in the pathogenesis of this disease are unknown.
Objective: To investigate the role of TLR2 upregulation in NCSTN and PSENEN knockdown keratinocytes.
Generalized pustular psoriasis: immunological mechanisms, genetics, and emerging therapeutics.
Trends Immunol
December 2024
College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Dermatology, Chang Gung Memorial Hospital, Keelung, Taiwan; Department of Dermatology, Chang Gung Memorial Hospital, Linkou, Taiwan; Department of Dermatology, Chang Gung Memorial Hospital, Taipei, Taiwan; Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan; Cancer Vaccine and Immune Cell Therapy Core Laboratory, Department of Medical Research, Chang Gung Memorial Hospital, Linkou, Taiwan; Chang Gung Immunology Consortium, Chang Gung Memorial Hospital and Chang Gung University, Taoyuan, Taiwan; Department of Dermatology, Xiamen Chang Gung Hospital, Xiamen, China; Xiamen Chang Gung Allergology Consortium, Xiamen Chang Gung Hospital, Xiamen, China; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Immune-Oncology Center of Excellence, Chang Gung Memorial Hospital, Linkou, Taiwan; Whole-Genome Research Core Laboratory of Human Diseases, Chang Gung Memorial Hospital, Keelung, Taiwan; Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan; School of Medicine, National Tsing Hua University, Hsinchu, Taiwan. Electronic address:
Generalized pustular psoriasis (GPP) is a rare human autoinflammatory disorder with life-threatening systemic effects. Keratinocyte-derived interleukin (IL)-36 signaling has been identified as a key mediator of immune response in the skin of affected individuals. Recognition of various mutations along the IL-36 axis and the downstream nuclear transcription factor κB (NF-κB) signaling have established GPP as genetically, immunologically, and histopathologically distinct and amenable to immunomodulation, which is epitomized by the recent success of IL-36 antagonism.
View Article and Find Full Text PDFConductive polyacrylamide/pullulan/ammonium sulfate hydrogels with high toughness, low-hysteresis and tissue-like modulus as flexible strain sensors.
Int J Biol Macromol
December 2024
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China.
Conductive hydrogels have great potential for applications in flexible wearable sensors due to the combination of biocompatibility, mechanical flexibility and electrical conductivity. However, constructing conductive hydrogels with high toughness, low hysteresis and skin-like modulus simultaneously remains challenging. In the present study, we prepared a tough and conductive polyacrylamide/pullulan/ammonium sulfate hydrogel with a semi-interpenetrating network.
View Article and Find Full Text PDFAngiogenesis-promoting effect of SKP-SC-EVs-derived miRNA-30a-5p in peripheral nerve regeneration by targeting LIF and ANGPT2.
J Biol Chem
December 2024
Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, NMPA Key Laboratory for Research and Evaluation of Tissue Engineering Technology Products, Nantong University, Nantong, Jiangsu, 226001, China. Electronic address:
Ischemia and hypoxia caused by vascular injury intensify nerve damage. Skin precursor-derived Schwann cells have demonstrated an accelerated in vivo pre-vascularization of tissue-engineered nerves. Furthermore, extracellular vesicles from skin precursor-derived Schwann cells (SKP-SC-EVs) show the potential in aiding peripheral nerve regeneration.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!