Eczema pathophysiology
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Edzel Lorraine Co, D.M.D., M.D.
Overview
There are two main theories on the existence of atopic dermatitis, also known as atopic eczema - the inside-out hypothesis, and the outside-in hypothesis.
Pathophysiology
- There are two main theories on the existence of atopic dermatitis, also known as atopic eczema - the inside-out hypothesis, and the outside-in hypothesis.[1]
- Inside-out hypothesis
- This hypothesis denotes that some allergic triggers weaken the skin barrier that leads to more introduction of allergens to the area, causing more inflammatory reaction.[1]
- Outside-in hypothesis
- This hypothesis suggests that an impairment of the skin barrier should occur first before the onset of atopic dermatitis.
- This involves the down-regulation of filaggrin genes (FLG) responsible for maintenance of the proper function of skin barrier.[1] [2]
References
- ↑ 1.0 1.1 1.2 Silverberg NB, Silverberg JI (2015). "Inside out or outside in: does atopic dermatitis disrupt barrier function or does disruption of barrier function trigger atopic dermatitis?". Cutis. 96 (6): 359–61. PMID 26761930.
- ↑ Leung DY, Guttman-Yassky E (2014). "Deciphering the complexities of atopic dermatitis: shifting paradigms in treatment approaches". J Allergy Clin Immunol. 134 (4): 769–79. doi:10.1016/j.jaci.2014.08.008. PMC 4186710. PMID 25282559.