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The epidermal differentiation complex (EDC) is a gene complex comprising over fifty genes encoding proteins involved in the terminal differentiation and cornification of keratinocytes, the primary cell type of the epidermis. In humans, the complex is located on a 1.9 Mbp stretch within chromosome 1q21.
n/a Ensembl ENSG00000143631 n/a UniProt P20930 n/a RefSeq (mRNA) NM_002016 n/a RefSeq (protein) NP_002007 n/a Location (UCSC) Chr 1: 152.3 – 152.33 Mb n/a PubMed search n/a Wikidata View/Edit Human Filaggrin (fil ament aggr egating prote in) is a filament-associated protein that binds to keratin fibers in epithelial cells. Ten to twelve filaggrin units are post-translationally hydrolyzed ...
During this differentiation process, keratinocytes permanently withdraw from the cell cycle, initiate expression of epidermal differentiation markers, and move suprabasally as they become part of the stratum spinosum, stratum granulosum, and eventually corneocytes in the stratum corneum.
This process begins when the EM fungus adheres to the root hair from the soil. [13] The fungus then secretes diffusible factors, to which root hairs are highly sensitive, allowing the hyphae to penetrate into the epidermal cells and create a Hartig net in the first layers of the root cortex. [ 13 ]
The epidermis is the outermost of the three layers that comprise the skin, the inner layers being the dermis and hypodermis. [1] The epidermal layer provides a barrier to infection from environmental pathogens [2] and regulates the amount of water released from the body into the atmosphere through transepidermal water loss.
This process is a normal protective mechanism of the skin to prevent pathogens from colonizing the skin, and is referred to as desquamation. In healthy skin, desquamation is an invisible process and the stratum corneum is turned over completely within 2–4 weeks, while maintaining the tissue thickness.
Sampling of human stratum corneum using a tape-stripping method [1]. The stratum corneum (Latin for 'horned layer') is the outermost layer of the epidermis.Consisting of dead tissue, it protects underlying tissue from infection, dehydration, chemicals and mechanical stress.
There is evidence that activated Notch 1 and Notch 3 promote differentiation of progenitor cells into astroglia. [33] Notch 1, then activated before birth, induces radial glia differentiation, [34] but postnatally induces the differentiation into astrocytes. [35] One study shows that Notch-1 cascade is activated by Reelin in an unidentified way ...