Am. J. Respir. Crit. Care Med., Volume 157, Number 3, March 1998, 873-879

RANTES Induces Nasal Mucosal Inflammation Rich in Eosinophils, Basophils, and Lymphocytes In Vivo

PIOTR KUNA, RAFEUL ALAM, URSZULA RUTA, and PAWEL GORSKI

Department of Occupational Medicine, Institute of Occupational Medicine, Lodz; Division of Pneumonology and Allergology, Medical University of Lodz, Lodz, Poland; and Department of Internal Medicine, Division of Allergy and Immunology, University of Texas Medical Branch, Galveston, Texas

RANTES is a CC chemokine that causes chemotaxis of eosinophils, basophils, and lymphocytes in vitro. The objective of this study was to investigate the effect of RANTES on the influx of inflammatory cells into the nasal mucosa of 12 allergic patients. In the first phase, each patient was challenged with RANTES or diluent on two subsequent days. RANTES caused a significant (p < 0.05) influx of eosinophils as compared with the diluent. The number of eosinophils were 5,548 ± 1,532/ml and 462 ± 206/ml after RANTES and diluent challenge, respectively, at the peak of the response at 2 h. There was also a significant influx of metachromatic cells and lymphocytes, but not monocytes, neutrophils, or epithelial cells after RANTES challenge. In the second phase, the patients were first challenged with an allergen and 24 h later, challenged with RANTES or diluent. In the allergen-primed mucosa RANTES induced a significantly higher influx of eosinophils, basophils, and lymphocytes. Further, RANTES caused migration of monocytes and neutrophils, and shedding of epithelial cells. The influx of the inflammatory cells was associated with symptoms of rhinitis. We conclude that RANTES induces a clinically symptomatic inflammatory response in vivo by causing chemotaxis of eosinophils, basophils, and mononuclear cells.

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