Phase 3 Study of Cysteamine Bitartrate Delayed-release (RP103) Compared to Cystagon® in Patients With Cystinosis

Summary

Cystinosis is an inherited disease that if untreated, results in kidney failure as early as the first decade of life. The current marketed therapy is Cystagon® (cysteamine bitartrate) which must be taken every six hours for the rest of the patient's life to prevent complications of cystinosis. RP103 is a formulation of cysteamine bitartrate that is being studied to see if it may be able to be given less frequently, once every 12 hours, and have similar results to four times a day Cystagon®.

Timeline

Start

2010-06

Primary completion

2011-06

Completion

2011-08

Publications

• Background Dohil R, Fidler M, Barshop BA, Gangoiti J, Deutsch R, Martin M, Schneider JA. Understanding intestinal cysteamine bitartrate absorption. J Pediatr. 2006 Jun;148(6):764-9. doi: 10.1016/j.jpeds.2006.01.050.
• Background Fidler MC, Barshop BA, Gangoiti JA, Deutsch R, Martin M, Schneider JA, Dohil R. Pharmacokinetics of cysteamine bitartrate following gastrointestinal infusion. Br J Clin Pharmacol. 2007 Jan;63(1):36-40. doi: 10.1111/j.1365-2125.2006.02734.x.
• Background Levtchenko EN, van Dael CM, de Graaf-Hess AC, Wilmer MJ, van den Heuvel LP, Monnens LA, Blom HJ. Strict cysteamine dose regimen is required to prevent nocturnal cystine accumulation in cystinosis. Pediatr Nephrol. 2006 Jan;21(1):110-3. doi: 10.1007/s00467-005-2052-0. Epub 2005 Oct 27.

Drugs

Indications