title: Asthma: clinical expression and molecular mechanisms.
abstract: Asthma is a complex disorder that displays heterogeneity and variability in its clinical expression both acutely and chronically. This heterogeneity is influenced by multiple factors including age, sex, socioeconomic status, race and/or ethnicity, and gene by environment interactions. Presently, no precise physiologic, immunologic, or histologic characteristics can be used to definitively make a diagnosis of asthma, and therefore the diagnosis is often made on a clinical basis related to symptom patterns (airways obstruction and hyperresponsiveness) and responses to therapy (partial or complete reversibility) over time. Although current treatment modalities are capable of producing control of symptoms and improvements in pulmonary function in the majority of patients, acute and often severe exacerbations still occur and contribute significantly to both the morbidity and mortality of asthma in all age groups. This review will highlight some of the important clinical features of asthma and emphasize recent advances in both pathophysiology and treatment.
authors.affiliation: Department of Pediatrics, University of Wisconsin Medical School, Madison, Wis., USA. rfl@medicine.wisc.edu
authors.forename: Robert F
authors.initials: RF
authors.lastname: Lemanske
authors.forename: William W
authors.initials: WW
authors.lastname: Busse
mesh_terms: D000328:Adult; D000402:Airway Obstruction / Q000276:immunology; D000485:Allergens / Q000276:immunology; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects / Q000627:therapeutic use; D001249:Asthma / Q000175:diagnosis / Q000453:epidemiology / Q000276:immunology* / Q000503:physiopathology / Q000628:therapy; D002648:Child; D018450:Disease Progression; D006801:Humans; D007114:Immunization; D017410:Practice Guidelines as Topic; D012307:Risk Factors
chemical_list: D000485:Allergens; D000894:Anti-Inflammatory Agents, Non-Steroidal