BACKGROUND: Interleukin (IL)-29 is a newly described cytokine that has anti-viral activity, induces tumor cell death and regulates immune function. Whether it plays a role in immune disorders is unclear. This study aims to examine the role of IL-29 in the modulation of immune response under allergic environment. METHODS: A group of patients with allergic asthma or/and allergic rhinitis was recruited to this study. Serum samples were collected from the patients in both in-season and out-season; the serum levels of IL-29 were determined by enzyme-linked immunoassay. Cell types of IL-29-producing cells in upper airway mucosa were identified with immune staining and examined by immunohistochemistry and flow cytometry. RESULTS: High serum levels of IL-29 were detected in patients with allergic asthma in in-season, but not in out-season. The majority of IL-29(+) cells in upper airway tissue were CD14(+) cells. Exposure to specific antigens triggered the release of IL-4 from antigen-specific CD4(+) T cells; the released IL-4 activated CD14(+) cells to release IL-29; the released IL-29 further triggered the release of IL-6 and tumor necrosis factor from CD4(+) T cells. CONCLUSIONS: Interleukin-29 is involved in the pathogenesis of allergic inflammation via modulating immune cells' function to release proinflammatory cytokines.
BACKGROUND:Interleukin (IL)-29 is a newly described cytokine that has anti-viral activity, induces tumor cell death and regulates immune function. Whether it plays a role in immune disorders is unclear. This study aims to examine the role of IL-29 in the modulation of immune response under allergic environment. METHODS: A group of patients with allergic asthma or/and allergic rhinitis was recruited to this study. Serum samples were collected from the patients in both in-season and out-season; the serum levels of IL-29 were determined by enzyme-linked immunoassay. Cell types of IL-29-producing cells in upper airway mucosa were identified with immune staining and examined by immunohistochemistry and flow cytometry. RESULTS: High serum levels of IL-29 were detected in patients with allergic asthma in in-season, but not in out-season. The majority of IL-29(+) cells in upper airway tissue were CD14(+) cells. Exposure to specific antigens triggered the release of IL-4 from antigen-specific CD4(+) T cells; the released IL-4 activated CD14(+) cells to release IL-29; the released IL-29 further triggered the release of IL-6 and tumornecrosis factor from CD4(+) T cells. CONCLUSIONS:Interleukin-29 is involved in the pathogenesis of allergic inflammation via modulating immune cells' function to release proinflammatory cytokines.
Authors: E Kathryn Miller; Johanna Zea Hernandez; Vera Wimmenauer; Bryan E Shepherd; Diego Hijano; Romina Libster; M Elina Serra; Niranjan Bhat; Juan P Batalle; Yassir Mohamed; Andrea Reynaldi; Andrea Rodriguez; Monica Otello; Nestor Pisapia; Jimena Bugna; Miguel Bellabarba; David Kraft; Silvina Coviello; F Martin Ferolla; Aaron Chen; Stephanie J London; George K Siberry; John V Williams; Fernando P Polack Journal: Am J Respir Crit Care Med Date: 2011-12-01 Impact factor: 21.405