Cited by 147Wound Healing and TreatmentsSkin and Cellular Biology ResearchTissue Engineering and Regenerative Medicine

Development of a Full-Thickness Human Skin Equivalent In Vitro Model Derived from TERT-Immortalized Keratinocytes and Fibroblasts

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Reijnders, Christianne M.A., van Lier, Amanda, Roffel, Sanne, Kramer, Duco, Scheper, Rik J., Gibbs, Susan·2015·Tissue Engineering Part A

Abstract

Currently, human skin equivalents (HSEs) used for in vitro assays (e.g., for wound healing) make use of primary human skin cells. Limitations of primary keratinocytes and fibroblasts include availability of donor skin and donor variation. The use of physiologically relevant cell lines could solve these limitations. The aim was to develop a fully differentiated HSE constructed entirely from human skin cell lines, which could be applied for in vitro wound-healing assays. Skin equivalents were constructed from human TERT-immortalized keratinocytes and fibroblasts (TERT-HSE) and compared with native skin and primary HSEs. HSEs were characterized by hematoxylin-eosin and immunohistochemical stainings with markers for epidermal proliferation and differentiation, basement membrane (BM), fibroblasts, and the extracellular matrix (ECM). Ultrastructure was determined with electron microscopy. To test the functionality of the TERT-HSE, burn and cold injuries were applied, followed by immunohistochemical stainings, measurement of reepithelialization, and determination of secreted wound-healing mediators. The TERT-HSE was composed of a fully differentiated epidermis and a fibroblast-populated dermis comparable to native skin and primary HSE. The epidermis consisted of proliferating keratinocytes within the basal layer, followed by multiple spinous layers, a granular layer, and cornified layers. Within the TERT-HSE, the membrane junctions such as corneosomes, desmosomes, and hemidesmosomes were well developed as shown by ultrastructure pictures. Furthermore, the BM consisted of a lamina lucida and lamina densa comparable to native skin. The dermal matrix of the TERT-HSE was more similar to native skin than the primary construct, since collagen III, an ECM marker, was present in TERT-HSEs and absent in primary HSEs. After wounding, the TERT-HSE was able to reepithelialize and secrete inflammatory wound-healing mediators. In conclusion, the novel TERT-HSE, constructed entirely from human cell lines, provides an excellent opportunity to study in vitro skin biology and can also be used for drug targeting and testing new therapeutics, and ultimately, for incorporating into skin-on-a chip in the future.

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  • The expansion of aHSEs enhances the application of OTC models for investigating therapeutic techniques, particularly in mimicking inflammatory skin diseases like psoriasis and atopic dermatitis, and in studying skin-related bacterial adhesion and infection.

    “This expansion enhances the application of OTC models for investigating potential therapeutic techniques [18,60], particularly in mimicking inflammatory skin diseases like psoriasis and atopic dermatitis [59], while also studying skin-related bacterial adhesion and infection [22,45].”

    From Diversity of human skin three-dimensional organotypic cultures (2024) · cites this paper as [45]

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  • Conventional primary cell-based HSEs have transitioned to more standardized and reproducible in vitro culture models using immortalized cell lines or hiPSC-derived cells.

    “Furthermore, in response to challenges associated with donor variability, conventional primary cell-based HSEs have transitioned to more standardized and reproducible in vitro culture models. These models utilize either immortalized cell lines [45] or cells derived from hiPSCs [17].”
  • HSEs can be completely submerged in medium for multiple days prior to raising them to an air-liquid interface to promote stratification, generated with immortalized keratinocyte cell lines, or seeded onto collagen layers.

    “HSEs can be completely submerged in medium for multiple days prior to raising them to an air-liquid interface to promote stratification,75 generated with immortalized keratinocyte cell lines,76 or seeded onto collagen layers.77”

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Authors
Reijnders, C. M. A., van Lier, A., Roffel, S., Kramer, D., Scheper, R. J., & Gibbs, S.
Affiliations
  • Amsterdam UMC Location Vrije Universiteit Amsterdam (NL)
  • Department of Dermatology, VU University Medical Centre, Amsterdam, The Netherlands.
  • University Medical Center Groningen (NL)
  • Academic Center for Dentistry Amsterdam (NL)
Corresponding author
Gibbs, Susan
Venue
Tissue Engineering Part A
Published
2015-09
Volume
21
Issue
17-18
Pages
2448-2459
ISSN
  • 1937-3341 (ISSN-L)
  • 1937-335X
OpenAlex
W1924256936
Cited by
147
References
68
Citations by year
2026: 13 · 2025: 18 · 2024: 14 · 2023: 19 · 2022: 18 · 2021: 12 · 2020: 7 · 2019: 12 · 2018: 13 · 2017: 13 · 2016: 8
FWCI
11.44
Type
journal article
Language
en
Open access
Locations
  • Tissue Engineering Part A (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • UvA-DARE (University of Amsterdam) (publishedVersion, other-oa)
  • Amsterdam UMC (VU Amsterdam) - Institutional Repository (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (publishedVersion, cc-by-nc)
  • VU Research Portal (publishedVersion, other-oa)
  • Pure Amsterdam UMC (submittedVersion, other-oa)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, cc-by-nc)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Funders
  • ZonMw (91111.006, 40-42600-98-010, 91111)
  • Vrije Universiteit Amsterdam
Topics
  • Health Sciences › Medicine › Rehabilitation › Wound Healing and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Skin and Cellular Biology Research
  • Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
Keywords
human skin equivalents, wound healing, re-epithelialization, burns, cold injury, extracellular matrix, type III collagen, basement membrane, epidermal differentiation, skin-on-a-chip, in vitro skin model
MeSH terms
Epidermal Cells, Cell Differentiation, Cell Line, Transformed, Fibroblasts, Humans, Immunohistochemistry, Male, Models, Biological, Wound Healing, Keratinocytes, Skin, Artificial, Chemokines, Telomerase, Dermis

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