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Usage Information

T lymphocyte recruitment by interleukin-8 (IL-8). IL-8-induced degranulation of neutrophils releases potent chemoattractants for human T lymphocytes both in vitro and in vivo.
D D Taub, … , D L Longo, W J Murphy
D D Taub, … , D L Longo, W J Murphy
Published April 15, 1996
Citation Information: J Clin Invest. 1996;97(8):1931-1941. https://doi.org/10.1172/JCI118625.
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Research Article

T lymphocyte recruitment by interleukin-8 (IL-8). IL-8-induced degranulation of neutrophils releases potent chemoattractants for human T lymphocytes both in vitro and in vivo.

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Abstract

IL-8 has been shown to be a human neutrophil and T cell chemoattractant in vitro. In an effort to assess the in vivo effects of IL-8 on human leukocyte migration, we examined the ability of rhIL-8 to induce human T cell infiltration using a human/mouse model in which SCID mice were administered human peripheral blood lymphocytes intraperitoneally, followed by subcutaneous injections of rhIL-8. rhIL-8 induced predominantly murine neutrophil accumulation by 4 h after administration while recombinant human macrophage inflammatory protein-1beta (rhMIP-1beta) induced both murine monocytes and human T cell infiltration during the same time period as determined by immunohistology. Interestingly, 72 h after chemokine administration, a marked human T cell infiltrate was observed in the IL-8 injection site suggesting that rhIL-8 may be acting indirectly possibly through a murine neutrophil-derived T cell chemoattractant. This hypothesis was confirmed using granulocyte-depleted SCID mice. Moreover, human neutrophils stimulated in vitro with IL-8 were found to release granule-derived factor(s) that induce in vitro T cell and monocyte chemotaxis and chemokinesis. This T cell and monocyte chemotactic activity was detected in extracts of both azurophilic and specific granules. Together, these results demonstrate that neutrophils store and release, upon stimulation with IL-8 or other neutrophil activators, chemoattractants that mediate T cell and monocyte accumulation at sites of inflammation.

Authors

D D Taub, M Anver, J J Oppenheim, D L Longo, W J Murphy

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