The Role of the Cysteamine Dioxygenase (ADO) Gene in Atopic Dermatitis
DOI:
https://doi.org/10.2340/actadv.v106.43770Keywords:
Zebrafish, Cysteamine Dioxygenase, HaCaT cells, Capture Hi-C, atopic dermatitis, taurineAbstract
Atopic dermatitis is a chronic inflammatory skin disorder influenced by genetic and environmental factors. A chromosome conformation capture study identified the cysteamine dioxygenase (ADO) gene as being associated with atopic dermatitis in differentiating keratinocytes. We aimed to evaluate the causal and pathophysiological roles of ADO in atopic dermatitis. This study utilized transcriptomic data and immunostaining techniques to analyse ADO expression. Human keratinocyte cell line (HaCat), and zebrafish models were employed to explore the functional role of ADO. RNA sequencing and immunostainings indicated higher ADO expression in lesional skin than in non-lesional skin in atopic dermatitis patients. Moreover, atopic dermatitis patients carrying the risk allele (C) exhibited increased levels of ADO in lesional skin. In vivo, zebrafish embryos with dysregulated ADO expression displayed impaired epidermal morphogenesis, particularly in their tails, along with increased neutrophil infiltration, indicating an inflammatory response. In vitro, alterations in ADO expression in HaCaT cells led to expression changes of proinflammatory cytokines and skin barrier markers. Further, both upregulation and downregulation of ADO were associated with enhanced reactive oxygen species production. These findings suggest that the ADO gene plays a critical role in maintaining skin homeostasis, and its dysregulation contributes to inflammation and compromised skin barrier function in the pathogenesis of atopic dermatitis.
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Copyright (c) 2026 Sailan Wang, Raquel Vaz, Josefin Lysell, Jesper Eisfeldt, Pelin Sahlén, Samina Asad, Carl-Fredrik Wahlgren, Magnus Nordenskjöld, Maria Bradley, Isabel Tapia-Paez
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