title: Enhancement of mite allergen-induced eosinophil infiltration in the murine airway and local cytokine/chemokine expression by Asian sand dust.
abstract: Data on the effects of sand dust toward allergic asthma produced by indoor allergens, such as house dust mites, are not currently available. This study was undertaken to clarify the role of Asian sand dust on mite allergen, Dermatophagoides farinae (D. farinae)-induced eosinophilic inflammation in the murine lung, using sand dusts from the Maowusu Desert (Inner Mongolia) (SD-1) and the Tengger Desert (China) (SD-2). ICR mice were intratracheally administered saline; SD-1 alone; SD-2 alone; D. farinae alone; D. farinae + SD-1; and D. farinae + SD-2, 4 times at 2-wk intervals. The two sand dusts enhanced infiltration of eosinophil in the airway, along with goblet-cell proliferation related to D. farinae. The degree of eosinophil infiltration induced with SD-2 was greater than with SD-1. The SD-1, which contained higher amounts of beta-glucan, increased the expression of interferon (IFN)-gamma in bronchoalveolar lavage fluids (BALF) with or without D. farinae, but SD-2 did not. Synergistically or cumulatively elevated levels of interleukin (IL)-5, eotaxin, and monocyte chemotactic protein in BALF related to D. farinae were higher with D. farinae + SD-2 than with D. farinae + SD-1. These results suggest that increased cytokine and chemokines in BALF play an important role in the enhancement of eosinophil infiltration in the airway induced by D. farinae + sand dusts. The reduced eosinophil infiltration in the SD-1-treated mice could be due to suppression of Th-2 cytokine and eotaxin via interferon-gamma induced by microbial materials, such as beta-glucan.
authors.affiliation: Department of Health Sciences, Oita University of Nursing and Health Sciences, Oita, Japan.
authors.forename: Takamichi
authors.initials: T
authors.lastname: Ichinose
authors.forename: Kaori
authors.initials: K
authors.lastname: Sadakane
authors.forename: Hirohisa
authors.initials: H
authors.lastname: Takano
authors.forename: Rie
authors.initials: R
authors.lastname: Yanagisawa
authors.forename: Masataka
authors.initials: M
authors.lastname: Nishikawa
authors.forename: Ikuko
authors.initials: I
authors.lastname: Mori
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kawazato
authors.forename: Aiko
authors.initials: A
authors.lastname: Yasuda
authors.forename: Kyoko
authors.initials: K
authors.lastname: Hiyoshi
authors.forename: Takayuki
authors.initials: T
authors.lastname: Shibamoto
mesh_terms: D000818:Animals; D039741:Antigens, Dermatophagoides / Q000276:immunology*; D001208:Asia; D001992:Bronchoalveolar Lavage Fluid / Q000737:chemistry; D018925:Chemokines / Q000096:biosynthesis*; D016207:Cytokines / Q000096:biosynthesis*; D004391:Dust; D004804:Eosinophils; D007249:Inflammation; D008168:Lung / Q000276:immunology / Q000473:pathology; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D012822:Silicon Dioxide
chemical_list: D039741:Antigens, Dermatophagoides; D018925:Chemokines; D016207:Cytokines; D004391:Dust; D012822:Silicon Dioxide