title: Neuroblastoma cell-mediated leukocyte chemotaxis: lineage-specific differentiation of interleukin-8 expression.
abstract: To determine whether neural crest-derived neuroblastoma cells may release cytokines which regulate the function of leukocytes, we found that neuroblastoma (HTB-11) cells did not constitutionally express IL-1 beta, TNF alpha, or IL-8 mRNA. However, TNF alpha, which induced HTB-11 cells to differentiate to perineurium-like cells, induced expression of IL-8 mRNA in a dose- and time-dependent fashion. In contrast, pentoxifylline (1 mM), which promoted HTB-11 cells to differentiate to polygonal neuron-like cells, did not induce IL-8 mRNA expression. As determined by enzyme-linked immunoassay, high levels of IL-8 were detectable in the culture supernatants from TNF alpha-treated neuroblastoma cells, but not pentoxifylline-treated neuroblastoma cells (19.60 +/- 2.34 vs 0.10 +/- 0.06 ng/ml). Culture supernatants obtained from TNF alpha-treated neuroblastoma cells induced chemotaxis of neutrophils and lymphocytes that was significantly blocked by anti-IL-8 neutralizing antibodies. Detection of a leukocyte chemotactic factor was not observed in the culture supernatants from pentoxifylline-treated cells. These results suggest that neural crest-derived perineurium-like cells, but not neuron-like cells, may release a leukocyte chemotactic factor or factors such as IL-8 which could be involved in leukocyte recruitment seen in inflammatory diseases affecting peripheral nerves.
authors.affiliation: Department of Pediatrics, National Defense Medical Center, Taipei, Taiwan, Republic of China.
authors.forename: K D
authors.initials: KD
authors.lastname: Yang
authors.forename: M F
authors.initials: MF
authors.lastname: Shaio
authors.forename: C L
authors.initials: CL
authors.lastname: Wang
authors.forename: N C
authors.initials: NC
authors.lastname: Wu
authors.forename: R M
authors.initials: RM
authors.lastname: Stone
mesh_terms: D002450:Cell Communication / Q000502:physiology; D002454:Cell Differentiation / Q000502:physiology; D002634:Chemotaxis, Leukocyte / Q000502:physiology*; D004305:Dose-Response Relationship, Drug; D004797:Enzyme-Linked Immunosorbent Assay; D005786:Gene Expression Regulation / Q000235:genetics; D006801:Humans; D016209:Interleukin-8 / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D009447:Neuroblastoma / Q000737:chemistry* / Q000473:pathology* / Q000503:physiopathology; D009504:Neutrophils / Q000166:cytology / Q000502:physiology; D010431:Pentoxifylline / Q000494:pharmacology; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics; D013997:Time Factors; D014407:Tumor Cells, Cultured; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D016209:Interleukin-8; D012333:RNA, Messenger; D014409:Tumor Necrosis Factor-alpha; D010431:Pentoxifylline