Psoriasis is characterized by altered epidermal expression of caspase 14, a novel regulator of keratinocyte terminal differentiation and barrier formation

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Psoriasis is characterized by altered epidermal expression of caspase 14, a novel regulator of keratinocyte terminal differentiation and barrier formation.

Caspases are a family of cysteine proteases involved in the effector arm of physiologic cell death [1]. In 1998, a novel caspase designated ‘‘caspase 14’’ was described in embryonic and adult tissues, especially epidermal keratinocytes [2—4]. Unlike other caspases (such as 3, 6 and 7), caspase 14 is not processed by typical death stimuli or activated during apoptosis induced by ultraviolet irra...

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Epigallocatechin-3-gallate (EGCG), the most abundant polyphenol in green tea, exerts chemopreventive effects by selectively inducing apoptosis in tumor cells. In contrast, EGCG accelerates terminal differentiation in normal human epidermal keratinocytes (NHEK) mediated partially by up-regulation of p57/KIP2, a cyclin-dependent kinase inhibitor that confers growth arrest and differentiation. How...

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ADAM17 (a disintegrin and metalloproteinase 17) is ubiquitously expressed and cleaves membrane proteins, such as epidermal growth factor receptor (EGFR) ligands, l-selectin, and TNF, from the cell surface, thus regulating responses to tissue injury and inflammation. However, little is currently known about its role in skin homeostasis. We show that mice lacking ADAM17 in keratinocytes (A17(ΔKC)...

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Terminal differentiation of human keratinocytes and stratum corneum formation is associated with caspase-14 activation.

Programmed cell death of epidermal keratinocytes (KC) results in the formation of cornified cells, which constitute the outermost skin layer, the stratum corneum. Here we show by reverse transcription-polymerase chain reaction, western blot, and immunohistochemistry that epidermal KC express caspase-14, a member of the caspase family of pro-apoptotic proteases, in a tissue-specific manner. Casp...

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ژورنال

عنوان ژورنال: Journal of Dermatological Science

سال: 2005

ISSN: 0923-1811

DOI: 10.1016/j.jdermsci.2004.10.003