title: Anti-inflammatory activity of clarithromycin in adults with chronically inflamed sinus mucosa.
abstract: In a phase IV, open-label study, 25 patients with clinically stable chronic sinusitis and persistent maxillary sinus inflammation were treated for 14 days with clarithromycin 500 mg twice daily. Biopsy specimens of the maxillary sinus mucosa were obtained pretreatment and evaluated for macrophages (CD68), eosinophils (MBP), elastase, interleukin-6 (IL-6), IL-8, tumor necrosis factor-alpha (TNF-alpha), and activity of eosinophils (EG2), as well as edema score. Clinical signs and symptoms were assessed pretreatment, at the end of treatment, and 1 and 2 weeks later. Statistically significant reductions (P < or = .05) from pretreatment were observed for all markers of sinus mucosal inflammation, including CD68, EG2, elastase, IL-6, IL-8, TNF-alpha, and edema score, with a trend to decreased total eosinophil count. Improvement was observed for all clinical signs and symptoms of chronic sinusitis--sinus pain, sinus headache, nasal congestion, nasal discharge, and mucopurulent discharge--up to 14 days after the end of treatment. Cultures to evaluate persistent infection with Chlamydia pneumoniae showed negative results. Significant reductions in various markers of sinus mucosal inflammation support the role of clarithromycin in modulating immunologic responses. Improvement of clinical signs and symptoms in patients with chronic inflammatory sinusitis not meeting criteria for known or presumed bacterial infection was also noted up to 2 weeks after completion of a 14-day course of clarithromycin.
authors.affiliation: Abbott Laboratories, Chicago, Illinois, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: MacLeod
authors.forename: Q A
authors.initials: QA
authors.lastname: Hamid
authors.forename: L
authors.initials: L
authors.lastname: Cameron
authors.forename: C
authors.initials: C
authors.lastname: Tremblay
authors.forename: W
authors.initials: W
authors.lastname: Brisco
mesh_terms: D000328:Adult; D000368:Aged; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D000893:Anti-Inflammatory Agents / Q000627:therapeutic use*; D002908:Chronic Disease; D017291:Clarithromycin / Q000627:therapeutic use*; D004804:Eosinophils / Q000473:pathology; D005260:Female; D006801:Humans; D018836:Inflammation Mediators / Q000378:metabolism; D015850:Interleukin-6 / Q000378:metabolism; D016209:Interleukin-8 / Q000378:metabolism; D008264:Macrophages / Q000473:pathology; D008297:Male; D008443:Maxillary Sinus / Q000473:pathology; D015523:Maxillary Sinusitis / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D008875:Middle Aged; D009092:Mucous Membrane / Q000378:metabolism / Q000473:pathology; D011446:Prospective Studies; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D000900:Anti-Bacterial Agents; D000893:Anti-Inflammatory Agents; D018836:Inflammation Mediators; D015850:Interleukin-6; D016209:Interleukin-8; D014409:Tumor Necrosis Factor-alpha; D017291:Clarithromycin