title: Requirement for the NF-kappaB family member RelA in the development of secondary lymphoid organs.
abstract: The transcription factor nuclear factor (NF)-kappaB has been suggested to be a key mediator of the development of lymph nodes and Peyer's patches. However, targeted deletion of NF-kappaB/ Rel family members has not yet corroborated such a function. Here we report that when mice lacking the RelA subunit of NF-kappaB are brought to term by breeding onto a tumor necrosis factor receptor (TNFR)1-deficient background, the mice that are born lack lymph nodes, Peyer's patches, and an organized splenic microarchitecture, and have a profound defect in T cell-dependent antigen responses. Analyses of TNFR1/RelA-deficient embryonic tissues and of radiation chimeras suggest that the dependence on RelA is manifest not in hematopoietic cells but rather in radioresistant stromal cells needed for the development of secondary lymphoid organs.
authors.affiliation: Center for Cancer Research and Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Alcamo
authors.forename: Nir
authors.initials: N
authors.lastname: Hacohen
authors.forename: Leah C
authors.initials: LC
authors.lastname: Schulte
authors.forename: Paul D
authors.initials: PD
authors.lastname: Rennert
authors.forename: Richard O
authors.initials: RO
authors.lastname: Hynes
authors.forename: David
authors.initials: D
authors.lastname: Baltimore
mesh_terms: D000818:Animals; D017951:Antigen Presentation / Q000502:physiology; D004268:DNA-Binding Proteins / Q000235:genetics / Q000502:physiology*; D005314:Embryonic and Fetal Development / Q000502:physiology; D005434:Flow Cytometry; D007150:Immunohistochemistry; D008221:Lymphoid Tissue / Q000196:embryology / Q000502:physiology; D051379:Mice; D018345:Mice, Knockout; D016328:NF-kappa B / Q000235:genetics / Q000502:physiology*; D013601:T-Lymphocytes / Q000276:immunology; D051996:Transcription Factor RelA
chemical_list: D004268:DNA-Binding Proteins; D016328:NF-kappa B; D051996:Transcription Factor RelA