Immunoglobulin A promotes IL-6 and IL-8 production, proliferation, and migration by the human bronchial smooth muscle cells

Cell Immunol. 2022 Sep 16;381:104612. doi: 10.1016/j.cellimm.2022.104612. Online ahead of print.ABSTRACTImmunoglobulin A (IgA) is important in biological defense, mainly in the mucosal area, and plays pathogenic roles in various diseases by activating both inflammatory and structural cells. The current study aimed to validate the effects of IgA on the human bronchial smooth muscle cell (BSMC), which plays a major role in airway inflammation and remodeling. Serum IgA induced interleukin (IL)-6 and IL-8 production at both mRNA and protein levels, and enhanced cell proliferation and migration by the BSMCs. The synthetic phenotype markers were regulated and the contractile phenotype markers were downregulated by serum IgA. Mitogen-activated protein kinase, phosphatidylinositol 3-kinase/Akt, and nuclear factor-κB pathways were involved in IgA-induced IL-6 and IL-8 production. The BSMCs expressed transferrin receptor (TfR), and TfR siRNA transfection inhibited IL-6 and IL-8 production by serum IgA. In summary, serum IgA is a potent activator of the BSMCs at least partially via TfR.PMID:36130412 | DOI:10.1016/j.cellimm.2022.104612

Source: Cellular Immunology - September 21, 2022 Category: Allergy & Immunology Authors: Sahoko Imoto Maho Suzukawa Kazufumi Takada Shizuka Watanabe Sayaka Igarashi Masashi Kitani Takahide Nagase Ken Ohta Source Type: research