CXCL12+ Dermal Fibroblasts Promote Neutrophil Recruitment and Host Defense by Recognition of IL-17

The study explores the role of CXCL12+ dermal fibroblasts in neutrophil recruitment and host defense, particularly through IL-17 signaling, during Staphylococcus aureus infection. Using mouse models and human psoriasis samples, researchers found that these fibroblasts, especially those in the reticular and adipocyte lineages, are crucial for producing chemokines and antimicrobial factors in response to IL-17 and TNFα. This process, mediated by the transcriptional regulator NFKBIZ, enhances neutrophil migration and activation, which is vital for effective immune responses. The study highlights the potential for targeting IL-17 and TNFα pathways to improve treatments for skin diseases, emphasizing the critical and versatile role of CXCL12+ fibroblasts in amplifying inflammatory responses.