alexa Presence of neutrophil-bearing antigen in lymphoid organs of immune mice.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Maletto BA, Ropolo AS, Alignani DO, Liscovsky MV, Ranocchia RP,

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Abstract Neutrophils play a crucial early role during the innate response, but little is known about their possible contribution when an adaptive immune response is installed. A robust neutrophilia and a T helper 1 (Th1) immune response are present after immunization with Complete Freund Adjuvant (CFA). We show that when FITC-labeled OVA was injected into the footpad of OVA/CFA immunized mice, the main OVA-FITC+ cells recruited in draining popliteal lymph nodes (LNs) were neutrophils, with most of them arriving at the LN by means of lymphatic vessels. The development of this OVA-FITC+ neutrophil influx requires an immune response against OVA. The OVA-FITC+ neutrophils present in LNs displayed mainly intracellular TNF-alpha, and their depletion resulted in an increase in the specific IL-5 levels. These data provide new evidence about the role played by neutrophils in vivo in adaptive immunity. This article was published in Blood and referenced in Journal of Clinical & Cellular Immunology

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