title: Regulation of human T lymphocyte chemotaxis in vitro by T cell-derived cytokines IL-2, IFN-gamma, IL-4, IL-10, and IL-13.
abstract: There has been a number of conflicting reports regarding the T lymphocyte chemotactic activities of several cytokines. IL-2 and IFN-gamma are known to promote augmentation of immune inflammation, whereas IL-4, IL-10, and IL-13 display immunomodulatory effects on inflammatory cells including inhibition of cytokine production. Their effects on chemotaxis of inflammatory cells are unknown. We observed that IL-1 alpha could induce chemotaxis both in overnight cultured and anti-CD3 mAb-activated T lymphocytes and that overnight culture and anti-CD3 activation increase the number of IL-1R on T lymphocytes. In contrast, IL-8 selectively attracts freshly isolated T lymphocytes. Staurosporine inhibits freshly isolated T lymphocyte chemotaxis toward IL-8, whereas tyrphostin 23 inhibits chemotaxis of overnight cultured and anti-CD3-activated T lymphocytes toward IL-1 alpha. We have found that IL-2 and IL-13 inhibit the chemotactic migration of both CD4+ and CD8+ T lymphocytes toward IL-8, and RANTES. IL-4 inhibits only CD8+ T lymphocyte chemotaxis toward RANTES, IL-8 and IL-10. IL-10 inhibits only CD4+ T lymphocytes in their chemotactic response toward RANTES and IL-8. IFN-gamma does on the other hand augment the sensitivity of human T lymphocytes to chemotactic stimuli. Thus, our results demonstrate that different proinflammatory cytokines will induce chemotactic migration of T lymphocytes under different circumstances acting through different signaling pathways. The T cell-derived cytokines IL-2, IL-4, IL-10, and IL-13 are able to block further T lymphocyte chemotaxis, thus leading to a focusing of T lymphocytes in an area of T lymphocyte activation. These mechanisms seem relevant in our understanding of the specific and continuous localization of T lymphocytes in allergic and autoimmune disorders.
authors.affiliation: Department of Dermatology, Aarhus University Hospital, Denmark.
authors.forename: J
authors.initials: J
authors.lastname: Tan
authors.forename: B
authors.initials: B
authors.lastname: Deleuran
authors.forename: B
authors.initials: B
authors.lastname: Gesser
authors.forename: H
authors.initials: H
authors.lastname: Maare
authors.forename: M
authors.initials: M
authors.lastname: Deleuran
authors.forename: C G
authors.initials: CG
authors.lastname: Larsen
authors.forename: K
authors.initials: K
authors.lastname: Thestrup-Pedersen
mesh_terms: D018946:Chemokine CCL5; D002634:Chemotaxis, Leukocyte / Q000187:drug effects*; D016207:Cytokines / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D007371:Interferon-gamma / Q000494:pharmacology; D007375:Interleukin-1 / Q000494:pharmacology; D016753:Interleukin-10 / Q000494:pharmacology; D018793:Interleukin-13 / Q000378:metabolism / Q000494:pharmacology; D007376:Interleukin-2 / Q000494:pharmacology; D015847:Interleukin-4 / Q000494:pharmacology; D016209:Interleukin-8 / Q000494:pharmacology; D008213:Lymphocyte Activation; D008222:Lymphokines / Q000494:pharmacology; D011493:Protein Kinase C / Q000037:antagonists & inhibitors; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors; D017472:Receptors, Interleukin-1 / Q000378:metabolism; D013601:T-Lymphocytes / Q000166:cytology* / Q000187:drug effects
chemical_list: D018946:Chemokine CCL5; D016207:Cytokines; D007375:Interleukin-1; D018793:Interleukin-13; D007376:Interleukin-2; D016209:Interleukin-8; D008222:Lymphokines; D017472:Receptors, Interleukin-1; D016753:Interleukin-10; D015847:Interleukin-4; D007371:Interferon-gamma; D011505:Protein-Tyrosine Kinases; D011493:Protein Kinase C