title: Protective antiviral antibody responses in a mouse model of influenza virus infection require TACI.
abstract: Antiviral Abs, for example those produced in response to influenza virus infection, are critical for virus neutralization and defense against secondary infection. While the half-life of Abs is short, Ab titers can last a lifetime due to a subset of the Ab-secreting cells (ASCs) that is long lived. However, the mechanisms governing ASC longevity are poorly understood. Here, we have identified a critical role for extrinsic cytokine signals in the survival of respiratory tract ASCs in a mouse model of influenza infection. Irradiation of mice at various time points after influenza virus infection markedly diminished numbers of lung ASCs, suggesting that they are short-lived and require extrinsic factors in order to persist. Neutralization of the TNF superfamily cytokines B lymphocyte stimulator (BLyS; also known as BAFF) and a proliferation-inducing ligand (APRIL) reduced numbers of antiviral ASCs in the lungs and bone marrow, whereas ASCs in the spleen and lung-draining lymph node were surprisingly unaffected. Mice deficient in transmembrane activator and calcium-modulator and cyclophilin ligand interactor (TACI), a receptor for BLyS and APRIL, mounted an initial antiviral B cell response similar to that generated in WT mice but failed to sustain protective Ab titers in the airways and serum, leading to increased susceptibility to secondary viral challenge. These studies highlight the importance of TACI signaling for the maintenance of ASCs and protection against influenza virus infection.
authors: The Wistar Institute, Philadelphia, Pennsylvania 19104, USA.
authors: Amaya I
authors: AI
authors: Wolf
authors: Krystyna
authors: K
authors: Mozdzanowska
authors: William J
authors: WJ
authors: Quinn
authors: Michele
authors: M
authors: Metzgar
authors: Katie L
authors: KL
authors: Williams
authors: Andrew J
authors: AJ
authors: Caton
authors: Eric
authors: E
authors: Meffre
authors: Richard J
authors: RJ
authors: Bram
authors: Loren D
authors: LD
authors: Erickson
authors: David
authors: D
authors: Allman
authors: Michael P
authors: MP
authors: Cancro
authors: Jan
authors: J
authors: Erikson
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000096:biosynthesis*; D000921:Antibody-Producing Cells / Q000276:immunology / Q000473:pathology / Q000528:radiation effects; D053264:B-Cell Activating Factor / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D002470:Cell Survival; D004195:Disease Models, Animal; D005260:Female; D008168:Lung / Q000276:immunology / Q000473:pathology / Q000528:radiation effects; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D018345:Mice, Knockout; D008822:Mice, Transgenic; D009976:Orthomyxoviridae Infections / Q000276:immunology*; D015398:Signal Transduction / Q000276:immunology; D053303:Transmembrane Activator and CAML Interactor Protein / Q000172:deficiency / Q000235:genetics / Q000276:immunology*; D053300:Tumor Necrosis Factor Ligand Superfamily Member 13 / Q000276:immunology
chemical_list: D000914:Antibodies, Viral; D053264:B-Cell Activating Factor; C486361:Tnfrsf13b protein, mouse; C491959:Tnfsf13 protein, mouse; D053303:Transmembrane Activator and CAML Interactor Protein; D053300:Tumor Necrosis Factor Ligand Superfamily Member 13