Refractory gout: what is it and what to do about it? 2008

Edward Fels, and John S Sundy
Departments of Pediatrics, Duke University Medical Center, Durham, NC 27710, USA.

OBJECTIVE The purpose of this review is to discuss the defining characteristics of refractory gout and the pharmacological management of this problem. RESULTS Refractory gout refers to those patients who have ongoing symptoms of active disease and cannot maintain a target serum urate less than 6 mg/dl. Patients with refractory gout have reduced quality of life, functional impairment, and joint destruction. Multiple factors contribute to refractory gout, and they often relate to delayed or insufficient dosing with allopurinol. Chronic kidney disease imparts a dose limitation on allopurinol that further impairs the effectiveness of urate-lowering therapy. Febuxostat, a novel xanthine oxidase inhibitor, represents a potential alternative to allopurinol in refractory gout patients. Uricase, the enzyme that catalyzes conversion of uric acid into allantoin, is showing promise with its ability to rapidly diminish serum urate levels. The recently defined role of the NALP3 inflammasome in the inflammatory phase of gout suggests a potential role for interleukin-1 inhibition in urate crystal-induced inflammation. CONCLUSIONS Refractory gout occurs when urate levels are not adequately controlled. Emerging therapies may improve the clinical course of patients with recalcitrant disease.

UI MeSH Term Description Entries
D007249 Inflammation A pathological process characterized by injury or destruction of tissues caused by a variety of cytologic and chemical reactions. It is usually manifested by typical signs of pain, heat, redness, swelling, and loss of function. Innate Inflammatory Response,Inflammations,Inflammatory Response, Innate,Innate Inflammatory Responses
D006073 Gout Metabolic disorder characterized by recurrent acute arthritis, hyperuricemia and deposition of sodium urate in and around the joints, sometimes with formation of URIC ACID calculi. Gouts
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000493 Allopurinol A XANTHINE OXIDASE inhibitor that decreases URIC ACID production. It also acts as an antimetabolite on some simpler organisms. Allohexal,Allohexan,Alloprin,Allopurin,Allorin,Allpargin,Allural,Apulonga,Apurin,Atisuril,Bleminol,Caplenal,Capurate,Cellidrin,Embarin,Foligan,Hamarin,Jenapurinol,Lopurin,Lysuron,Milurit,Milurite,Novopurol,Pan Quimica,Progout,Pureduct,Purinol,Remid,Rimapurinol,Roucol,Suspendol,Tipuric,Uribenz,Uridocid,Uripurinol,Urosin,Urtias,Xanthomax,Xanturic,Zygout,Zyloprim,Zyloric
D000893 Anti-Inflammatory Agents Substances that reduce or suppress INFLAMMATION. Anti-Inflammatory Agent,Antiinflammatory Agent,Agents, Anti-Inflammatory,Agents, Antiinflammatory,Anti-Inflammatories,Antiinflammatories,Antiinflammatory Agents,Agent, Anti-Inflammatory,Agent, Antiinflammatory,Agents, Anti Inflammatory,Anti Inflammatories,Anti Inflammatory Agent,Anti Inflammatory Agents
D014503 Urate Oxidase An enzyme that catalyzes the conversion of urate and unidentified products. It is a copper protein. The initial products decompose to form allantoin. EC 1.7.3.3. Uricase,Oxidase, Urate
D014528 Uricosuric Agents Gout suppressants that act directly on the renal tubule to increase the excretion of uric acid, thus reducing its concentrations in plasma. Uricosuric Agent,Agent, Uricosuric,Agents, Uricosuric
D017211 Treatment Failure A measure of the quality of health care by assessment of unsuccessful results of management and procedures used in combating disease, in individual cases or series. Failure, Treatment,Failures, Treatment,Treatment Failures

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