CXCL14 increase dendritic cell antigen presentation and promote asthma immune response.

Asthma is a chronic airway inflammatory disease characterized by reversible airflow limitation and airway hyperresponsiveness, which requires long-term drug treatment and management. It is very important to study the etiology and pathogenesis of asthma for clinical asthma prevention and treatment. In this study, to understand the correlation between C-X-C motif chemokine ligand 14 (CXCL14) in bone marrow dendritic cells (BMDCs) and antigen presentation of asthma dendritic cells (DCs), an in vitro model of BMDCs was constructed for RNA sequencing (RNA-seq). The changes of CXCL14 in BMDCs after house dust mites (HDM) stimulation were evaluated. Finally, evaluated the inflammation of the lung tissue in mice, and the expression of costimulatory molecules on the DCs surface in the lung tissue was analyzed by flow cytometry. The results showed that CXCL14 was upregulated in BMDCs after HDM stimulation, and its function was related to signal molecule interaction and the immune system. The expression of CXCL14 was increased in the HDM-induced allergic asthma model. Knockdown of CXCL14 reduced the expression of costimulatory molecules CD86, CD80, and major histocompatibility complex II on the surface of DCs in the lung tissue of mice, induced immune tolerance, and reduced lung inflammatory cell infiltration and inflammatory factor levels, providing new ideas and theoretical basis for the clinical treatment of bronchial asthma.