Repeated ultraviolet irradiation induces the expression of Toll-like receptor 4, IL-6, and IL-10 in neonatal human melanocytes.
Photodermatol Photoimmunol Photomed
; 34(2): 145-151, 2018 Mar.
Article
en En
| MEDLINE
| ID: mdl-29063638
ABSTRACT
BACKGROUND:
Human melanocytes express Toll-like receptor 4 (TLR4), which regulates ultraviolet (UV)-induced cutaneous immunosuppression in Langerhans cells. Lipopolysaccharide (LPS) stimulation increases melanocyte pigmentation and TLR4 expression, while inducing local innate inflammatory responses.AIMS:
We investigated whether UV radiation induces TLR4 expression in neonatal human melanocytes (NHMs) and how this affects the immune system.METHODS:
We cultured NHMs with LPS treatment or with one-time or repeated UVA or UVB exposure, and investigated and compared the effects on TLR4 expression, melanin contents, and cytokine production.RESULTS:
NHMs in the resting state did not express TLR4. LPS stimulation induced TLR4 expression and increased pigmentation. TLR4 expression was not detected after single-dose UVA or UVB treatment, but pigmentation increased. Repeated UV treatment induced TLR4 expression and increased pigmentation. LPS stimulation and repeated UV treatment increased IL-6 secretion, and repeated UVB treatment increased IL-10 secretion.CONCLUSION:
These results suggest that human melanocytes may actively participate in UV-induced immune modulation.Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Rayos Ultravioleta
/
Regulación de la Expresión Génica
/
Interleucina-6
/
Interleucina-10
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Receptor Toll-Like 4
/
Melanocitos
Límite:
Humans
Idioma:
En
Revista:
Photodermatol Photoimmunol Photomed
Asunto de la revista:
ALERGIA E IMUNOLOGIA
/
DERMATOLOGIA
Año:
2018
Tipo del documento:
Article