The suppressor of cytokine signaling (SOCS)-3 determines keratinocyte proliferative and migratory potential during skin repair.
Recently, the suppressor of cytokine signaling (SOCS)-3 has been shown to be expressed in disturbed wound margin epithelia during diabetes-impaired wound healing in mice. To functionally connect a potential contribution of SOCS-3 expression to the control of wound keratinocyte behavior in skin repair, we created a transgenic mouse (tsgn-K5/SOCS3) overexpressing SOCS-3 in keratinocytes using the bovine keratin 5 promoter. Tsgn-K5/SOCS3 mice showed a constitutive expression of SOCS-3 in the basal layer of skin epidermis. Keratinocytes of tsgn-K5/SOCS3 mice showed full inhibition of signal transducer and activator of transcription (STAT)-3 phosphorylation. Tsgn-K5/SOCS3 keratinocytes also showed a strong inhibition of migratory and proliferative potential in vitro. In addition, tsgn-K5/SOCS3 keratinocytes co-expressed the differentiation marker loricrin in the basal layer of nonwounded skin in vivo. Upon wounding, wound tissues of tsgn-K5/SOCS3 mice showed an impairment of wound closure characterized by strongly atrophied wound margin epithelia. Atrophied epithelia of tsgn-K5/SOCS3 mice exhibited a marked reduction in proliferating cells and reduced total keratinocyte numbers. In summary, this study suggests that the presence of SOCS-3 in keratinocytes strongly disturbs epithelial repair of cutaneous wounds by interfering with keratinocyte proliferation and migration.
Linke
Andreas
A
Pharmazentrum Frankfurt/ZAFES, Klinikum der Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany.
Goren
Itamar
I
Bösl
Michael R
MR
Pfeilschifter
Josef
J
Frank
Stefan
S
D000818:Animals; D002417:Cattle; D002454:Cell Differentiation / Q000502:physiology; D002455:Cell Division / Q000502:physiology; D002465:Cell Movement / Q000502:physiology*; D002478:Cells, Cultured; D004848:Epithelium / Q000502:physiology; D015870:Gene Expression / Q000502:physiology; D006801:Humans; D015603:Keratinocytes / Q000166:cytology* / Q000502:physiology*; D008565:Membrane Proteins / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D012867:Skin / Q000166:cytology / Q000293:injuries* / Q000378:metabolism; D000071223:Suppressor of Cytokine Signaling 3 Protein; D050826:Suppressor of Cytokine Signaling Proteins / Q000235:genetics / Q000378:metabolism*; D014945:Wound Healing / Q000502:physiology*
D008565:Membrane Proteins; C491411:Socs3 protein, mouse; D000071223:Suppressor of Cytokine Signaling 3 Protein; D050826:Suppressor of Cytokine Signaling Proteins; C064554:loricrin