title: Delayed clearance of zymosan-induced granuloma and depressed phagocytosis of macrophages with concomitant up-regulated kinase activities of Src-family in a human monocyte chemoattractant protein-1 transgenic mouse.
abstract: A human monocyte chemoattractant protein-1 (hMCP-1) transgenic mouse (Tgm) line which constitutively produces a large amount of hMCP-1 (7-13 ng/ml in the serum) was established. Although expression of the transgene was detected in various tissues, an accumulation of macrophages (Mphi) was seen in only lymphoid organs which might be attributed to the high concentration of hMCP-1 in these organs. A reduced phagocytosis by peritoneal Mphi in vivo and a delayed clearance of granulomas in the liver following zymosan administration were observed in these Tgm. However, peritoneal exudate cells (PEC) from Tgm exhibited normal in vitro phagocytic activity and nitric oxide (NO) production upon stimulation with IFN-gamma as compared with those from non-Tgm. In addition, high activities of src-family protein tyrosine kinases (PTK), Fgr and Hck, were also noted in the peritoneal resident cells from Tgm, whereas the level of mitogen-activated protein kinase (MAPK) activity was almost the same as that of non-Tgm. It was suggested that the low functional activities of Tgm Mphi seen in vivo were attributed to down-regulation of the unique transducing system of hMCP-1 signals under the influence of a high concentration of the hMCP-1. It seemed that the depressed functions were recovered when the peritoneal cells were released ex vivo from such a high hMCP-1 environment.
authors.affiliation: Section of Pathology, Institute of Immunological Science Hokkaido University, Sapporo, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Ato
authors.forename: K
authors.initials: K
authors.lastname: Iwabuchi
authors.forename: N
authors.initials: N
authors.lastname: Matsuki
authors.forename: N
authors.initials: N
authors.lastname: Mukaida
authors.forename: C
authors.initials: C
authors.lastname: Iwabuchi
authors.forename: A
authors.initials: A
authors.lastname: Takahashi
authors.forename: T
authors.initials: T
authors.lastname: Takayanagi
authors.forename: E A
authors.initials: EA
authors.lastname: Dondog
authors.forename: S
authors.initials: S
authors.lastname: Hatakeyama
authors.forename: H
authors.initials: H
authors.lastname: Ishikura
authors.forename: M
authors.initials: M
authors.lastname: Kato
authors.forename: I
authors.initials: I
authors.lastname: Negishi
authors.forename: H
authors.initials: H
authors.lastname: Nishihori
authors.forename: K
authors.initials: K
authors.lastname: Watano
authors.forename: K
authors.initials: K
authors.lastname: Ogasawara
authors.forename: K
authors.initials: K
authors.lastname: Matsushima
authors.forename: K
authors.initials: K
authors.lastname: Onoé
mesh_terms: D000818:Animals; D001202:Ascitic Fluid; D018932:Chemokine CCL2 / Q000235:genetics / Q000276:immunology*; D006099:Granuloma / Q000139:chemically induced / Q000276:immunology*; D006801:Humans; D008221:Lymphoid Tissue / Q000166:cytology; D017737:Macrophages, Peritoneal / Q000276:immunology*; D051379:Mice; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D009374:Neoplasms, Experimental / Q000139:chemically induced / Q000276:immunology; D009569:Nitric Oxide / Q000096:biosynthesis; D010587:Phagocytosis / Q000276:immunology*; D011505:Protein-Tyrosine Kinases / Q000276:immunology*; D011518:Proto-Oncogene Proteins / Q000276:immunology*; D051572:Proto-Oncogene Proteins c-hck; D015854:Up-Regulation / Q000276:immunology*; D015054:Zymosan / Q000008:administration & dosage; D019061:src-Family Kinases / Q000276:immunology
chemical_list: D018932:Chemokine CCL2; D011518:Proto-Oncogene Proteins; D009569:Nitric Oxide; D015054:Zymosan; D011505:Protein-Tyrosine Kinases; C496631:HCK protein, human; C496632:Hck protein, mouse; D051572:Proto-Oncogene Proteins c-hck; C053102:proto-oncogene proteins c-fgr; D019061:src-Family Kinases