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- W1964183396 abstract "Subsequent to wounding, keratinocytes must quickly restore barrier function. In vitro wound models have served to elucidate mechanisms of epithelial closure and key roles for integrins α6β4 and α3β1. To extrapolate in vitro data to in vivo human tissues, we used ultrathin cryomicrotomy to simultaneously observe tissue ultrastructure and immuno-gold localization in unwounded skin and acute human cutaneous wounds. Localization of the β4 integrin subunit in unwounded skin shows dominant hemidesmosomal association and minor basal keratinocyte lateral filopodic cell–cell expression. After wounding, β4 dominantly localized to cytokeratin-rich regions (trailing edge hemidesmosomes) and minor association with lamellipodia (leading edge). β4 colocalizes with α3 within filopodia juxtaposed to wound matrix, and increased concentrations of β4 were found in cytoplasmic vesicles within basal keratinocytes of the migrating tongue. α3 integrin subunit dominantly localized to filopodia within basal keratinocyte lateral cell–cell interfaces in unwounded skin and both cell–cell and cell–matrix filopodic interactions in wounded skin. This study indicates that β4 interacts with the extracellular environment through both stable and transient interactions and may be managed through a different endosomal trafficking pathway than α3. α3 integrin, despite its ability to respond to alternate ligands after wounding, does so through a single structure, the filopodia." @default.
- W1964183396 created "2016-06-24" @default.
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- W1964183396 creator A5056207691 @default.
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- W1964183396 date "2008-11-11" @default.
- W1964183396 modified "2023-10-01" @default.
- W1964183396 title "Ultrastructural Localization of Integrin Subunits β4 and α3 Within the Migrating Epithelial Tongue of In Vivo Human Wounds" @default.
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- W1964183396 doi "https://doi.org/10.1369/jhc.2008.952176" @default.
- W1964183396 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2628320" @default.
- W1964183396 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18824633" @default.
- W1964183396 hasPublicationYear "2008" @default.
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