Dermoepidermal junction

Not to be confused with dentinoenamel junction.

The dermoepidermal junction or dermal-epidermal junction (DEJ) is the interface between the epidermal and the dermal layers of the skin. The basal cells of the epidermis connect to the basement membrane by the anchoring filaments of hemidesmosomes; the cells of the papillary layer of the dermis are attached to the basement membrane by anchoring fibrils, which consist of type VII collagen.^[1][2]

H&E stained section of human skin

Clinical significance

• Interface dermatitis includes conditions which primarily involve the dermoepidermal junction.^[3]
• Stevens–Johnson syndrome and toxic epidermal necrolysis are diseases where there is a breakdown of the dermoepidermal junction.

References

1. "Dermo-epidermal junction zone". Netzwerk Epidermolysis bullosa. 2006. Archived from the original on 11 February 2013. Retrieved 30 November 2011.
2. Standring S, ed. (2016). "Skin and its appendages". Gray's Anatomy: The Anatomical Basis of Clinical Practice (41 ed.). Elsevier. p. 147. ISBN 978-0-7020-5230-9.
3. Joshi R (May 2013). "Interface dermatitis". Indian Journal of Dermatology, Venereology and Leprology. 79 (3): 349–359. doi:10.4103/0378-6323.110780. PMID 23619439. Archived from the original on 9 March 2023.