TY - JOUR
T1 - Expression of lymphotoxin beta governs immunity at two distinct levels
AU - Tobias, Junt
AU - Tumanov, Alexei V.
AU - Harris, Nicola
AU - Heikenwalder, Mathias
AU - Zeller, Nicolas
AU - Kuprash, Dmitry V.
AU - Aguzzi, Adriano
AU - Burkhard, Ludewig
AU - Nedospasov, Sergei A.
AU - Zinkernagel, Rolf M.
PY - 2006/8
Y1 - 2006/8
N2 - Interaction of lymphotoxin α1β2 (LTα1β2) with its receptor is key for the generation and maintenance of secondary lymphoid organ microstructure. We used mice conditionally deficient for LTβ on different lymphocyte subsets to determine how the LTβ-dependent lymphoid structure influences immune reactivity. All conditionally LTβ-deficient mice mounted normal immune responses against vesicular stomatitis virus (VSV), and were protected against lymphocytic choriomeningitis virus (LCMV). In contrast, they exhibited reduced immune responses against non-replicating antigens. Completely LTβ-deficient mice failed to retain VSV in the marginal zone and died from VSV infections, and they became virus carriers following infection with the non-cytopathic LCMV, which was correlated with defective virus replication in dendritic cells. It was ruled out that LTβ expression on lymphocytes influenced their activation, homing capacity, or maturation. We therefore conclude that LTβ expression influences immune reactivity at two distinct levels: (i) Expression of LTβ on lymphocytes enhances the induction of immune responses against limiting amounts of antigen. (ii) Expression of LTβ on non-lymphocytes governs antiviral immunity by enhancing antigen presentation on antigen-presenting cells. This prevents cytotoxic T lymphocytes exhaustion or death of the host by uncontrolled virus spread.
AB - Interaction of lymphotoxin α1β2 (LTα1β2) with its receptor is key for the generation and maintenance of secondary lymphoid organ microstructure. We used mice conditionally deficient for LTβ on different lymphocyte subsets to determine how the LTβ-dependent lymphoid structure influences immune reactivity. All conditionally LTβ-deficient mice mounted normal immune responses against vesicular stomatitis virus (VSV), and were protected against lymphocytic choriomeningitis virus (LCMV). In contrast, they exhibited reduced immune responses against non-replicating antigens. Completely LTβ-deficient mice failed to retain VSV in the marginal zone and died from VSV infections, and they became virus carriers following infection with the non-cytopathic LCMV, which was correlated with defective virus replication in dendritic cells. It was ruled out that LTβ expression on lymphocytes influenced their activation, homing capacity, or maturation. We therefore conclude that LTβ expression influences immune reactivity at two distinct levels: (i) Expression of LTβ on lymphocytes enhances the induction of immune responses against limiting amounts of antigen. (ii) Expression of LTβ on non-lymphocytes governs antiviral immunity by enhancing antigen presentation on antigen-presenting cells. This prevents cytotoxic T lymphocytes exhaustion or death of the host by uncontrolled virus spread.
KW - Antibody
KW - Cytotoxic T lymphocyte
KW - Lymphoid structure
KW - Virus infections
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U2 - 10.1002/eji.200626255
DO - 10.1002/eji.200626255
M3 - Article
C2 - 16841297
AN - SCOPUS:33747401325
SN - 0014-2980
VL - 36
SP - 2061
EP - 2075
JO - European Journal of Immunology
JF - European Journal of Immunology
IS - 8
ER -