CD70+ antigen-presenting cells control the proliferation and differentiation of T cells in the intestinal mucosa.
One unresolved issue in gut immunity is how mucosal T lymphocytes are activated and which antigen-presenting cell (APC) is critical for the regulation of this process. We have identified a unique population of APCs that is exclusively localized in the lamina propria. These APCs constitutively expressed the costimulatory molecule CD70 and had antigen-presenting functions. After oral infection of mice with Listeria monocytogenes, proliferation and differentiation of antigen-specific T cells occurred in the gut mucosa in situ and blockade of CD70 costimulation abrogated the mucosal T cell proliferation and effector functions. Thus, a potent CD70-dependent stimulation via specialized tissue-specific APCs is required for the proliferation and differentiation of gut mucosal T cells after oral infection.
Laouar
Amale
A
The CBR Institute for Biomedical Research and Department of Pediatrics, Harvard Medical School, Boston, Massachusetts 02115, USA.
Haridas
Viraga
V
Vargas
Dorothy
D
Zhinan
Xia
X
Chaplin
David
D
van Lier
Rene A W
RA
Manjunath
N
N
D000818:Animals; D017951:Antigen Presentation / Q000276:immunology; D015703:Antigens, CD / Q000276:immunology*; D053282:CD27 Ligand; D002454:Cell Differentiation / Q000276:immunology; D005434:Flow Cytometry; D007150:Immunohistochemistry; D007413:Intestinal Mucosa / Q000166:cytology / Q000276:immunology* / Q000382:microbiology; D008089:Listeria monocytogenes / Q000276:immunology*; D008088:Listeriosis / Q000276:immunology* / Q000473:pathology; D008213:Lymphocyte Activation / Q000276:immunology; D008565:Membrane Proteins / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008822:Mice, Transgenic; D010587:Phagocytosis / Q000276:immunology; D013047:Specific Pathogen-Free Organisms; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology*; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7 / Q000276:immunology
D015703:Antigens, CD; D053282:CD27 Ligand; C505772:Cd70 protein, mouse; D008565:Membrane Proteins; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7