IL4 and asthma: To further investigate the potential effects of CBL0137 on airway remodeling, we measured the levels of asthma-associated inflammatory factors, including interleukins (IL-4, IL-5, and IL-13), immunoglobulin E (IgE), and immunoglobulin G (IgG), in serum and bronchoalveolar lavage fluid using enzyme-linked immunosorbent assay (ELISA) kits.