alexa Peroxiredoxin 6 is a potent cytoprotective enzyme in the epidermis.
Pathology

Pathology

Journal of Clinical & Experimental Pathology

Author(s): Kmin A, Huber C, Rlicke T, Wolf E, Werner S

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Abstract Peroxiredoxin 6 is an enzyme that detoxifies hydrogen peroxide and various organic peroxides. In previous studies we found strongly increased expression of peroxiredoxin 6 in the hyperproliferative epidermis of wounded and psoriatic skin, suggesting a role of this enzyme in epidermal homeostasis. To address this question, we generated transgenic mice overexpressing peroxiredoxin 6 in the epidermis. Cultured keratinocytes from transgenic mice showed enhanced resistance to the toxicity of various agents that induce oxidative stress. However, overexpression of peroxiredoxin 6 did not affect skin morphogenesis or homeostasis. On skin injury, enhancement of wound closure was observed in aged animals. Most importantly, peroxiredoxin 6 overexpression strongly reduced the number of apoptotic cells after UVA or UVB irradiation. These findings demonstrate that peroxiredoxin 6 protects keratinocytes from cell death induced by reactive oxygen species in vitro and in vivo, suggesting that activation of this enzyme could be a novel strategy for skin protection under stress conditions.
This article was published in Am J Pathol and referenced in Journal of Clinical & Experimental Pathology

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