alexa Peroxiredoxin I and II are up-regulated during differentiation of epidermal keratinocytes.
Dermatology

Dermatology

Journal of Clinical & Experimental Dermatology Research

Author(s): Yun SJ, Seo JJ, Chae JY, Lee SC

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Abstract Peroxiredoxins (Prxs) are expressed in the epidermis, and the accentuated expression of the Prx I and Prx II isotypes (Prx I/II) in the suprabasal layers suggests the potential role of Prx I/II in epidermal differentiation. To evaluate the novel function of Prx I/II, we checked the modulation of Prx I/II in differentiating keratinocytes. To induce differentiation in vitro, normal human epidermal keratinocytes (NHEK) were cultured for up to 10 days after the confluent state (post-confluency). In Western blot analysis, the marked induction of Prx I was observed from the second day, but the marked induction of Prx II was observed later from the sixth day of post-confluency, when loricrin and transglutaminase 1 were induced (sixth day of post-confluency). When NHEK cells were treated with INF-gamma and TGF-beta1, Prx I/II were up-regulated by INF-gamma, but Prx I/II were down-regulated by TGF-beta1. In summary, Prx I and Prx II are induced at the early and late stage of differentiation of NHEK cells, respectively. This article was published in Arch Dermatol Res and referenced in Journal of Clinical & Experimental Dermatology Research

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