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- W2021018843 abstract "Congenital hemidysplasia with ichthyosiform erythroderma and limb defects (CHILD) syndrome is a rare genetic disorder. The epidermal abnormalities associated with the unilateral ichthyosis have previously been examined only by morphology. In order to describe these abnormalities more completely we analyzed the expression of markers of epidermal differentiation (keratins and filaggrin), grew keratinocytes in culture, and correlated the results with ultrastructural features. Expression of all differentiation markers was significantly reduced or absent, whereas keratins K5 and K14 and keratins K6 and K16 were strongly expressed in lesional epidermis, suggesting that basal cell keratin expression was not down-regulated as in normal epidermis and that lesional keratinocytes mature via an abnormal pathway. When removed from the tissue and grown in culture, keratinocytes from lesional and non-lesional biopsies had similar phase microscopic morphology as well as keratin and profilaggrin expression, in contrast to the extreme differences in vivo. Lesional keratinocytes also had similar contents of keratin filaments and keratohyalin, but showed abnormal accumulation of intercellular vesicles and debris and altered cell-cell and cell-substratum interaction. Comparison of the results in tissue and in culture suggests that systemic or dermal factors influence the abnormal structural protein expression and ichthyosiform epidermal differentiation seen in CHILD syndrome, but that lesional keratinocytes maintain abnormalities in the secretion and accumulation of extracellular material in vitro similar to the lesional tissue in vivo." @default.
- W2021018843 created "2016-06-24" @default.
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- W2021018843 date "1992-04-01" @default.
- W2021018843 modified "2023-10-18" @default.
- W2021018843 title "CHILD Syndrome: Lack of Expression of Epidermal Differentiation Markers in Lesional Ichthyotic Skin" @default.
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- W2021018843 doi "https://doi.org/10.1111/1523-1747.ep12499852" @default.
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