Vitamin D, skin filaggrin, allergic sensitization, and race.
Ann Allergy Asthma Immunol
; 128(4): 399-407.e3, 2022 04.
Article
em En
| MEDLINE
| ID: mdl-35081436
ABSTRACT
BACKGROUND:
In addition to its involvement in both the innate and adaptive immune systems, vitamin D has been found to affect keratinocyte function and proliferation, suggesting a possible role for vitamin D in cutaneous allergic sensitization.OBJECTIVE:
To explore the role of circulating vitamin D levels in allergic sensitization.METHODS:
Serum 25-hydroxyvitamin D (25(OH)D) levels were measured in a subset of children (N = 323) enrolled in the Mechanisms of Progression of Atopic Dermatitis to Asthma in Children cohort, a prospective early life cohort of children with atopic dermatitis. Allergic sensitization was determined using skin prick testing, and FLG expression in the keratinocytes was measured by quantitative polymerase chain reaction. Multiple Poisson regression was used to evaluate interaction effects between serum 25(OH)D levels and FLG expression with sensitization load as the outcome.RESULTS:
Black participants had significantly lower mean levels of serum 25(OH)D compared with non-Black participants (29.3 vs 32.9 ng/mL; P < .001). FLG expression and sensitization load were negatively correlated in non-Black participants with 25(OH)D levels less than 27.2 ng/mL (Rho = -0.45; P = .02). No association between FLG expression and sensitization load was found in Black participants or participants with 25(OH)D levels greater than or equal to 27.2 ng/mL. Multiple Poisson regression models confirmed that 25(OH)D levels interact with FLG expression to affect sensitization load in non-Black participants.CONCLUSION:
Despite lower vitamin D levels in Black participants, sensitization load was associated with nonlesional skin FLG expression in non-Black, but not Black, children with low vitamin D levels. Thus, a complex interplay of factors determines the impact of vitamin D on allergic sensitization.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vitamina D
/
Dermatite Atópica
/
Eczema
/
Proteínas Filagrinas
Tipo de estudo:
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Aspecto:
Determinantes_sociais_saude
Limite:
Child
/
Humans
Idioma:
En
Revista:
Ann Allergy Asthma Immunol
Assunto da revista:
ALERGIA E IMUNOLOGIA
Ano de publicação:
2022
Tipo de documento:
Article