title: IL-1 alpha or tumor necrosis factor-alpha stimulate release of three NAP-1/IL-8-related neutrophil chemotactic proteins in human dermal fibroblasts.
abstract: Human dermal fibroblasts in culture secrete three protein-like neutrophil chemotactic factors, when stimulated either with human rIL-1 alpha or IL-1 beta; not, however, after incubation with LPS. These three fibroblast-derived neutrophil-activating proteins (FINAP) could be purified by subsequently performed reversed phase and size exclusion HPLC. By high resolution SDS-PAGE, all the proteins were shown to migrate with an Mr of 6,700 (alpha-FINAP), 3,600 (beta-FINAP), and 5,300 (gamma-FINAP). All purified cytokine preparations were found to be chemotactic for human neutrophils. In addition, all FINAP induced release of lysosomal enzymes in neutrophils. Deactivation of chemotaxin-elicitable enzyme release showed cross-desensitization of all FINAP with NAP-1/IL-8. Western blot analysis of alpha-FINAP by using mAb against neutrophil-activating protein (NAP)-1/IL-8 reveals immunologic cross-reactivity with NAP-1/IL-8. By amino-terminal amino acid sequence analysis alpha-FINAP could be identified as the 77-residue extended form of NAP-1/IL-8 containing the 79-residue form as a minor contaminant. Whereas beta-FINAP has been found to be a truncation product of alpha-FINAP, gamma-FINAP shows identity with authentic melanoma growth stimulatory activity with respect to retention time upon reversed phase HPLC, high resolution SDS-PAGE, and biologic properties, as well as amino-terminal amino acid sequence. These data show that human dermal fibroblasts may actively participate in inflammatory reactions by secretion of proinflammatory cytokines.
authors.affiliation: Department of Dermatology, University of Kiel, Federal Republic of Germany.
authors.forename: J M
authors.initials: JM
authors.lastname: Schröder
authors.forename: M
authors.initials: M
authors.lastname: Sticherling
authors.forename: H H
authors.initials: HH
authors.lastname: Henneicke
authors.forename: W C
authors.initials: WC
authors.lastname: Preissner
authors.forename: E
authors.initials: E
authors.lastname: Christophers
mesh_terms: D000595:Amino Acid Sequence; D002478:Cells, Cultured; D002630:Chemotactic Factors / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D002634:Chemotaxis, Leukocyte; D002851:Chromatography, High Pressure Liquid; D005347:Fibroblasts / Q000378:metabolism; D006801:Humans; D066298:In Vitro Techniques; D007375:Interleukin-1 / Q000494:pharmacology*; D016209:Interleukin-8; D007378:Interleukins / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D008969:Molecular Sequence Data; D008970:Molecular Weight; D009504:Neutrophils / Q000502:physiology*; D012636:Secretory Rate / Q000187:drug effects; D012867:Skin / Q000166:cytology / Q000378:metabolism*; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*
chemical_list: D002630:Chemotactic Factors; D007375:Interleukin-1; D016209:Interleukin-8; D007378:Interleukins; D014409:Tumor Necrosis Factor-alpha