Specific Immunoglobulin G4 Correlates with Th2 Cytokine Reduction in Patients with Allergic Asthma Treated by Dermatophagoides Pteronyssinus Subcutaneous Immunotherapy
Overview
Affiliations
Background: The modulations of lymphocyte subsets and cytokine production due to subcutaneous allergen immunotherapy (SCIT) are not fully clarified.
Objective: We investigated the changes in T-lymphocyte subsets and serum -specific immunoglobulin G4 (Der-p sIgG4), as well as cytokine production during Der-p SCIT, in patients with allergic asthma.
Methods: This study involved 20 patients with allergic asthma who were receiving 156-week Der-p SCIT and 20 patients without SCIT (non-SCIT). We measured symptom and medication scores (SMS), serum Der-p sIgG4 levels, CD4CD25Foxp3 T regulatory (Treg), CD4IL-4IFN-γ T-helper (Th) 1, and CD4IL-4IFN-γ Th2 lymphocyte percentages in peripheral blood mononuclear cells (PBMCs) with/without Der-p extract stimulation at weeks 0, 4, 12, 16, 52, 104, and 156. Cytokine release inhibition assays were performed by incubation with serum from SCIT and non-SCIT patients, Der-p allergen, and PBMCs. Levels of interleukin (IL)-4, IL-5, IL-10, IL-13, IL-17, interferon (IFN)-γ, tumor necrosis factor (TNF)-α, and transforming growth factor (TGF)-β1 were evaluated in supernatant.
Results: We found that SCIT patients had significantly lower SMS after week 52. Der-p sIgG4 levels in SCIT patients significantly increased at week 16 compared with non-SCIT subjects. CD4IL-4IFN-γ Th2% in SCIT patients showed a significant decrease from weeks 104-156 compared with week 0, while no change was observed in CD4CD25Foxp3 Treg and CD4IL-4IFN-γ Th1 percentages. IL-5, IL-13, IL-4, IL-17, and TNF-α levels in supernatant of PBMCs cultured with serum of SCIT patients after 16 weeks showed significant lower levels compared with non-SCIT patients, and showed significant reverse associations with Der-p sIgG4 levels.
Conclusion: SCIT induced Dep-p sIgG4 may be involved in downregulating Th2 cytokine production in Der-p allergic asthma patients.
Wei T, Gao K, Tai J, Wei Y, Zhan B Kaohsiung J Med Sci. 2024; 41(1):e12916.
PMID: 39739782 PMC: 11724161. DOI: 10.1002/kjm2.12916.