A Case of Etanercept Treatment in a Patient with Ankylosing Spondylitis on Peritoneal Dialysis

Treatments for patient with ankylosing spondylitis (AS) in-clude nonsteroidal antiinflammatory drugs (NSAIDs), disease-modifying antirheumatic drugs (DMARDs) and antitumor necrosis factor-alpha (TNFα) agents. However, owing to the well-known nephrotoxicity of NSAIDs and some DMARDs, the use of these drugs is limited in AS patients with renal insufficiency. As the pharmacokinetics and metabolism of anti-TNFα agents in patients of end stage renal disease, especially those receiving peritoneal dialysis (PD), have not been investigated well, little is known about treating them with anti-TNFα agents. We described the safety and efficacy of etanercept, a soluble fusion protein comprising the TNF receptor 2 in linkage with the Fc portion of immunoglobulin G, in a 40-year-old male AS patient receiving PD.