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. 2024 May;33(5):e15109.
doi: 10.1111/exd.15109.

Ultraviolet B irradiation increases the expression of cornulin and retepin in human skin xenotransplants

Teruhiko Makino  1 , Megumi Mizawa  1 , Keita Takemoto  1 , Tadamichi Shimizu  1
Affiliations

Ultraviolet B irradiation increases the expression of cornulin and retepin in human skin xenotransplants

Teruhiko Makino et al. Exp Dermatol. 2024 May.

Abstract

Cornulin (CRNN) and repetin (RPTN) belong to the fused-type S100 protein family. Although these proteins have been reported to be expressed in the granular layer of the epidermis and have been suggested to be associated with barrier formation in the epidermis, their exact function remains unclear. This study examined the effects of ultraviolet B (UVB) irradiation on CRNN and RPTN expression in human skin xenotransplantation. The CRNN expression increased in the granular layer of UVB-irradiated skin 2 days after UVB irradiation compared to that in sham-irradiated skin. Interestingly, CRNN signals were observed not only in the cytoplasm, but also in the peripheral regions of granular keratinocytes. In contrast, RPTN was rarely expressed in sham-irradiated skin; however, RPTN signals were markedly increased in the granular layer of the UVB-irradiated skin. In addition, activation of ERK1/2 and STAT3 was observed in UVB-irradiated skin. Accordingly, the present study demonstrated that CRNN and RPTN are novel proteins whose expression can be increased by UVB irradiation. The activation of ERK1/2 and STAT3 may be associated with the regeneration of a UVB-damaged epidermis, and CRNN and RPTN may be induced to repair any dysfunction in the epidermal barrier during this regeneration process.

Keywords: ERK1/2; STAT3; cornulin; epidermis; keratinocyte; repetin; skin barrier; ultraviolet B.

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References

REFERENCES

    1. Kypriotou M, Huber M, Hohl D. The human epidermal differentiation complex: cornified envelope precursors, S100 proteins and the fused genes family. Exp Dermatol. 2012;21:643‐649.
    1. Contzler R, Favre B, Huber M, Hohl D. Cornulin, a new member of the fused gene family, is expressed during epidermal differentiation. J Invest Dermatol. 2005;124:990‐997.
    1. Trzeciak M, Sakowicz‐Burkiewicz M, Wesserling M, et al. Altered expression of genes encoding cornulin and repetin in atopic dermatitis. Int Arch Allergy Immunol. 2017;172:11‐19.
    1. Chen K, Li Y, Dai Y, et al. Characterization of tumor suppressive function of cornulin in esophageal squamous cell carcinoma. PLoS One. 2013;8:e68838.
    1. Govindaraj PK, Kallarakkal TG, Mohd Zain R, Tilakaratne WM, Lew HL. Expression of Ki‐67, cornulin and ISG15 in non‐involved mucosal surgical margins as predictive markers for relapse in oral squamous cell carcinoma (OSCC). PLoS One. 2021;16:e0261575.

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