Unique skin abnormality in patients with peanut allergy but no atopic dermatitis - 09/01/21
Abstract |
Background |
The nonlesional skin of children with atopic dermatitis (AD) with peanut allergy (PA) is associated with increased transepidermal water loss; low urocanic acid (UCA) and pyrrolidone carboxylic acid (PCA), both of which are filaggrin breakdown products; and a reduced ratio of esterified ω-hydroxy fatty acid sphingosine ceramides (EOS-CERs) to nonhydroxy fatty acid sphingosine ceramides (NS-CERs) in the skin. The skin barrier of subjects with PA without AD (AD–PA+) has not been studied.
Objective |
Our aim was to explore whether AD–PA+ is associated with skin barrier abnormalities.
Methods |
A total of 33 participants were enrolled, including 13 AD–PA+, 9 AD+PA+, and 11 nonatopic (NA) participants.
Results |
The PCA content in the stratum corneum of AD–PA+ subjects was significantly reduced versus that in NA subjects (median level, 67 vs 97 μg/mg protein [P = .028]). The ratio between cis- and trans-UCA decreased significantly from being highest in the NA group (1.62) to lowest in AD+PA+ group (0.07 [P < .001 vs in the NA group; P = .006 vs in the AD–PA+ group]), with the AD–PA+ group having an intermediate cis/trans-UCA ratio (1.17 [P = .024 vs in the NA group]). The TEWL in AD–PA+ subjects did not differ from that in the group with NA skin. Interestingly, AD–PA+ subjects had an increased EOS/NS-CER ratio versus that in the group of subjects with NA skin (1.9 vs 1.3 [P = .008]), whereas the AD+PA+ group had a decreased proportion of EOS-CERs (0.8 [P = .001] vs in the AD–PA+ group).
Conclusion |
Our data demonstrate that irrespective of AD, PA is associated with decreased skin cis-UCA and PCA content. An increase in skin EOS-CER/NS-CER ratio separates the AD–PA+ group from the AD+PA+ and NA groups.
Il testo completo di questo articolo è disponibile in PDF.Key words : Atopic dermatitis, food allergy, skin barrier, peanut allergy
Abbreviations used : AD, AD–PA+, AD+PA+, AUC, EOS-CER, FA, FLG, LC-ESI–MS/MS, NA, NMF, NS-CER, PA, PCA, SC, STS, TEWL, UCA
Mappa
| Supported by the National Institutes of Health/National Center for Advancing Translational Sciences Colorado Clinical and Translational Science Award (grant UL1 TR002535), the Atopic Dermatitis Research Network Leadership Center (grant 1UM1AI151958–01), the Atopic Dermatitis Research Network Clinical Research Center (grant 1U01AI152037-01), and the Edelstein Family Chair for Pediatric Allergy at National Jewish Health. |
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| Disclosure of potential conflict of interest: The authors declare that they have no relevant conflicts of interest. |
Vol 147 - N° 1
P. 361 - Gennaio 2021 Ritorno al numero
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