Cutaneous immunization rapidly activates liver invariant Valpha14 NKT cells stimulating B-1 B cells to initiate T cell recruitment for elicitation of contact sensitivity.
Cutaneous immunization rapidly activates liver invariant Valpha14 NKT cells stimulating B-1 B cells to initiate T cell recruitment for elicitation of contact sensitivity.
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DOI:
10.1084/jem.20021562
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发表时间:
2003-12-15
期刊:
影响因子:
--
通讯作者:
Askenase PW
中科院分区:
文献类型:
--
作者:
Campos RA;Szczepanik M;Itakura A;Akahira-Azuma M;Sidobre S;Kronenberg M;Askenase PW
T cell recruitment to elicit contact sensitivity (CS) requires a CS-initiating process mediated by B-1 cells that produce IgM, which activates complement to promote T cell passage into the tissues. We now show that Vα14i NKT cells induce B-1 cell activation likely by releasing IL-4 early postimmunization. The CS initiation process is absent in Jα18−/− and CD1d−/− NKT cell–deficient mice and is reconstituted by populations enriched for Vα14i NKT cells. Transfers are not effective if cells are derived from IL-4−/− mice. Staining with specific tetramers directly showed that hepatic Vα14i NKT cells increase by 30 min and nearly double by 2 h postimmunization. Transfer of immune B-1 cells also reconstitutes CS responses in NKT cell–deficient mice. The B-1 cells act downstream of the Vα14i NKT cells to restore CS initiation. In addition, IL-4 given systemically to Jα18−/− or CD1d−/− NKT cell–deficient mice reconstitutes elicitation of CS. Further, splenocytes from immune Jα18−/− mice produce less antigen (Ag)-specific IgM antibodies compared with sensitized WT mice. Together these findings indicate that very early after skin immunization Vα14i NKT cells are stimulated to produce IL-4, which activates B-1 cells to produce Ag-specific IgM, subsequently needed to recruit effector T cells for elicitation of CS responses.
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DOI:
10.1084/jem.152.5.1358
发表时间:
1980-11-01
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
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DOI:
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