Clinical Trial: Surveillance Study to Estimate the Incidence of Pure Red Blood Cell Aplasia Among Patients With Chronic Kidney Failure

Study Status: Completed
Recruit Status: Completed
Study Type: Observational

Official Title: A Prospective, Immunogenicity Surveillance Registry (PRIMS) to Estimate the Incidence of Erythropoietin Antibody-Mediated Pure Red Cell Aplasia Among Subjects With Chronic

Brief Summary: The purpose of this study is to estimate the incidence rate of pure red cell aplasia (PRCA; aplastic anemia) mediated by erythropoietin (EPO) antibodies in patients who are receiving subcutaneous (s.c.) epoetin alfa (polysorbate 80 formulation) for the treatment of anemia associated with chronic renal failure (CRF), and to compare this incidence rate to the incidence rate with s.c. exposure to other currently marketed recombinant erythropoietin products (epoetin alfa, epoetin beta, darbepoetin alfa), with adjustment of duration for which the drug is given to the patient. The study will also examine the impact of the pattern of using mixed s.c. exposure to multiple erythropoietin products occurring in this patients, and the impact of the time from which the treatment is started to the onset of PRCA.

Detailed Summary: In 1998, prompted by concern that human serum albumin (HAS- the stabilizer in the epoetin alfa formulation) could theoretically transmit Creutzfeldt-Jakob disease and bovine spongiform encephalopathy, an alternative epoetin alfa formulation using polysorbate 80 as a stabilizer was introduced. The polysorbate 80 epoetin alfa formulation became available in a variety of product presentations (i.e., single-use vials and prefilled syringes with both coated and uncoated stoppers) to provide for prescribing flexibility, patient convenience, and choice of route of administration. Soon after the introduction of the polysorbate 80 epoetin alfa formulation in prefilled syringes, an increasing number of cases of EPO antibody-mediated pure red cell aplasia (PRCA) were reported in patients with chronic renal failure (CRF) exposed to epoetin alfa by the s.c. route. This led to contraindication of the s.c. route for epoetin alfa in the European Union (E.U.) and Switzerland in December 2002. It was subsequently shown that the increased risk for PRCA was associated with one specific polysorbate 80 epoetin alfa presentation - prefilled syringes with uncoated rubber stoppers. It appeared that uncoated rubber stoppers, when exposed to polysorbate 80, released organic compounds (leachates) into the epoetin alfa formulation, and that these leachates were the most probable product-specific cause for the increase in EPO antibody-mediated PRCA. A worldwide recall of the polysorbate 80 epoetin formulation in prefilled syringes with uncoated stoppers was completed in March 2004. FluroTec-coated stoppers are now used in all prefilled syringes containing the polysorbate 80 epoetin alfa formulation, to prevent leachates from entering the formulation. Following these actions, the incidence rate of EPO antibody-mediated PRCA in CRF patients receiving s.c. epoetin alfa fell to a level similar to that for the HSA-containing epoetin formulation, which has a long-standing and well-characterized safety
Sponsor: Johnson & Johnson Pharmaceutical Research & Development, L.L.C.

Current Primary Outcome: estimate the incidence rate of EPO antibody-mediated Pure Red Cell Aplasia (PRCA) [ Time Frame: Unexplained Loss of Effect (LOE) follow-up ]

Original Primary Outcome:

Current Secondary Outcome: sensitivity analyses [ Time Frame: Unexplained Loss of Effect (LOE) follow-up ]

Original Secondary Outcome:

Information By: Johnson & Johnson Pharmaceutical Research & Development, L.L.C.

Dates:
Date Received: October 20, 2006
Date Started: June 2006
Date Completion:
Last Updated: October 2, 2014
Last Verified: October 2014