Skin microbe-dependent TSLP-ILC2 priming axis in early life is co-opted in allergic inflammation.
Cell Host Microbe
; 32(2): 244-260.e11, 2024 Feb 14.
Article
in En
| MEDLINE
| ID: mdl-38198924
ABSTRACT
Although early life colonization of commensal microbes contributes to long-lasting immune imprinting in host tissues, little is known regarding the pathophysiological consequences of postnatal microbial tuning of cutaneous immunity. Here, we show that postnatal exposure to specific skin commensal Staphylococcus lentus (S. lentus) promotes the extent of atopic dermatitis (AD)-like inflammation in adults through priming of group 2 innate lymphoid cells (ILC2s). Early postnatal skin is dynamically populated by discrete subset of primed ILC2s driven by microbiota-dependent induction of thymic stromal lymphopoietin (TSLP) in keratinocytes. Specifically, the indole-3-aldehyde-producing tryptophan metabolic pathway, shared across Staphylococcus species, is involved in TSLP-mediated ILC2 priming. Furthermore, we demonstrate a critical contribution of the early postnatal S. lentus-TSLP-ILC2 priming axis in facilitating AD-like inflammation that is not replicated by later microbial exposure. Thus, our findings highlight the fundamental role of time-dependent neonatal microbial-skin crosstalk in shaping the threshold of innate type 2 immunity co-opted in adulthood.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Dermatitis, Atopic
/
Thymic Stromal Lymphopoietin
Limits:
Adult
/
Humans
/
Newborn
Language:
En
Journal:
Cell Host Microbe
/
Cell host & microbe
/
Cell host microbe
Journal subject:
MICROBIOLOGIA
Year:
2024
Document type:
Article
Country of publication: