title: Characterization of Th1 activation by Bartonella henselae stimulation in BALB/c mice: Inhibitory activities of interleukin-10 for the production of interferon-gamma in spleen cells.
abstract: This study was conducted to analyze cytokine production mechanisms in mice after Bartonella henselae stimulation. BALB/c mice were inoculated intraperitoneally with 3 x 10(6) colony forming units of B. henselae (Houston-1 strain) twice at 10-day interval. Spleen cells were harvested from the mice and stimulated with the organisms. Following the stimulation, interferon-gamma (IFN-gamma) and interleukin-4 (IL-4), IL-10, IL-12 and tumor necrosis factor-alpha (TNF-alpha) were measured in the culture supernatants of the spleen cells by ELISA. The spleen cells specifically secreted IFN-gamma, but not IL-4, indicating that T helper 1 (Th1) cells were activated following B. henselae stimulation. In addition, IL-10 and TNF-alpha productions were also detected in the culture supernatants of spleen cells. Neutralization of IL-10 in the culture supernatants significantly enhanced the production of IFN-gamma from the spleen cells stimulated with B. henselae. These results indicate that B. henselae predominantly stimulated Th1 cells and resulted in secreting IFN-gamma, however the production was partially inhibited by IL-10, which was produced simultaneously.
authors.affiliation: Laboratory of Veterinary Public Health, Department of Veterinary Medicine, College of Bioresource Science, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-8510, Japan. kabeya@brs.nihon-u.ac.jp
authors.forename: Hidenori
authors.initials: H
authors.lastname: Kabeya
authors.forename: Akiko
authors.initials: A
authors.lastname: Yamasaki
authors.forename: Mikako
authors.initials: M
authors.lastname: Ikariya
authors.forename: Rie
authors.initials: R
authors.lastname: Negishi
authors.forename: Bruno B
authors.initials: BB
authors.lastname: Chomel
authors.forename: Soichi
authors.initials: S
authors.lastname: Maruyama
mesh_terms: D016917:Angiomatosis, Bacillary / Q000276:immunology / Q000662:veterinary*; D000818:Animals; D018416:Bartonella henselae / Q000276:immunology*; D002478:Cells, Cultured; D015169:Colony Count, Microbial / Q000662:veterinary; D005260:Female; D007371:Interferon-gamma / Q000037:antagonists & inhibitors / Q000096:biosynthesis*; D016753:Interleukin-10 / Q000096:biosynthesis / Q000494:pharmacology*; D018664:Interleukin-12 / Q000096:biosynthesis; D015847:Interleukin-4 / Q000096:biosynthesis; D051379:Mice; D008807:Mice, Inbred BALB C; D009500:Neutralization Tests; D013047:Specific Pathogen-Free Organisms; D013154:Spleen / Q000166:cytology / Q000276:immunology; D018417:Th1 Cells / Q000276:immunology*; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis
chemical_list: D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10; D018664:Interleukin-12; D015847:Interleukin-4; D007371:Interferon-gamma