Study of a JAK3 Inhibitor for the Prevention of Acute Rejection in Kidney Transplant Patients

Study Summary

A new immunosuppressive drug, based on the inhibition of an important enzyme in the immune system called JAK3, is being developed by Pfizer to prevent transplant rejection. In this research study, a JAK3 inhibitor or cyclosporine will be given to new kidney transplant patients for 12 months. Patients will be assigned to one of three treatment groups after receiving a kidney transplant. Two of the treatment groups will receive 2 different dosing regimens of the JAK3 inhibitor that will be taken by mouth. The third treatment group will be a standard-of-care control arm. Patients will continue to take the assigned study medication for 12 months as well as other standard transplant medications such as prednisone.

Primary Outcome

Clinical BPAR was a BPAR (category acute rejection as interpreted by the central blinded pathologist according to the Banff 97 working classification) associated with an increase in serum creatinine of \>= 0.3 milligram per deciliter (mg/dL) and \>=20 percent (%) from pre-rejection baseline. The increase in serum creatinine was assessed based on the comparison of baseline and the highest serum creatinine recorded within 24 hours (hrs) of the time of biopsy.

Conditions Studied

Interventions

• DRUG Cyclosporine
• DRUG CP-690,550

Study Locations (20)