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Ectopic expression of syndecan-1 in basal epidermis affects keratinocyte proliferation and wound re-epithelialization

Ojeh, Nkemcho; Hiilesvuo, Katri; Wärri, Anni; Salmivirta, Markku; Henttinen, Tiina; Maatta, Arto

Authors

Nkemcho Ojeh

Katri Hiilesvuo

Anni Wärri

Markku Salmivirta

Tiina Henttinen



Abstract

Epidermal proliferation and differentiation can be regulated by soluble morphogens and growth factors. Heparan sulfate proteoglycans (HSPGs) modulate the action of several of these effector molecules, such as members of the fibroblast growth factor (FGF) and Wnt families. Syndecan-1 is a cell-surface proteoglycan that is expressed in differentiating keratinocytes and transiently upregulated in all layers of the epidermis upon tissue injury. To address the role of syndecan-1 in the regulation of keratinocyte proliferation and differentiation, we generated transgenic mice that overexpress syndecan-1 under K14 keratin promoter in the basal layer of the epidermis. We observed epidermal hyperproliferation in newborn transgenic mice, as evidenced by increased number of suprabasal cell layers, elevated proliferating cell nuclear antigen (PCNA) expression in both basal and suprabasal cell layers and by expression of keratin 6 in the interfollicular epidermis. Compared to both wild-type and syndecan-1-null animals, the transgene expression interfered with skin wound healing in adult mice by decreasing cell proliferation in the re-epithelialized epidermis. Thus, syndecan-1 regulates keratinocyte proliferation differently during skin development and in healing wounds.

Citation

Ojeh, N., Hiilesvuo, K., Wärri, A., Salmivirta, M., Henttinen, T., & Maatta, A. (2007). Ectopic expression of syndecan-1 in basal epidermis affects keratinocyte proliferation and wound re-epithelialization. Journal of Investigative Dermatology, 128(1), 26-34. https://doi.org/10.1038/sj.jid.5700967

Journal Article Type Article
Online Publication Date Jul 12, 2007
Publication Date Jul 12, 2007
Deposit Date Jul 31, 2007
Journal Journal of Investigative Dermatology
Print ISSN 0022-202X
Electronic ISSN 1523-1747
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 128
Issue 1
Pages 26-34
DOI https://doi.org/10.1038/sj.jid.5700967