Clinical Trial: Initial Study of Rituximab to Treat Primary Biliary Cirrhosis
Study Status: Completed
Recruit Status: Completed
Study Type: Interventional
Official Title: Effects of Rituximab (Rituxan) on B Cell and AMA Response in Patients With Primary Biliary Cirrhosis
Brief Summary: The purpose of this study is to determine the safety of the anti-CD20 antibody rituximab in treating patients with Primary Biliary Cirrhosis (PBC). Rituximab is a laboratory-made antibody currently used to treat some kinds of lymphoma. Rituximab may also help people with PBC, a disease of the immune system. However, the safety of rituximab in PBC patients must first be established.
Detailed Summary:
This is a pilot, open-label, study on 10 female patients with AMA-positive PBC to determine the effects of two infusions of rituximab on response of memory B cells to bacterial motifs, on biochemical function, and histological features. We will enroll 10 consecutive AMA-positive patients with the diagnosis of PBC based on internationally accepted criteria and histological staging determined at liver biopsy and being currently treated with UDCA. Importantly, patients with advanced histological stages, decompensated liver disease, or waiting for OLT will not be included in the study (see exclusion criteria).
Patients eligible and willing to enter the study will be evaluated at baseline by isolation and study of frequency and absolute numbers of B cells and their function, biochemical and AMA tests. Histology and quality of life will be also evaluated in all patients. The methodology to be used for B cell study is already well-established in our laboratory as can be seen in the attached paper (Kikuchi et al. 2005b). Patients will be administered 1,000 mg rituximab intravenously by slow infusion on Day 1 and Day 15 (+/- 1 day). Rituximab's pharmacokinetics indicate that complete B cell depletion is obtained 2-3 days after administration and that such effect may be lost after 9 months (Vieira et al. 2004). In addition to our B cell work, serum samples will undergo AMA testing, including titers, using recombinant mitochondrial antigens (Miyakawa et al. 2001). Patients will also undergo serum chemistry panel, which includes liver function tests. Patients will continue on a steady dose of UDCA therapy throughout the study.
Sponsor: University of California, Davis
Current Primary Outcome: Safety of rituximab in PBC patients [ Time Frame: January 2010 ]
Original Primary Outcome: Safety of rituximab administration in patients with PBC
Current Secondary Outcome:
Original Secondary Outcome:
Information By: University of California, Davis
Dates:
Date Received: August 15, 2006
Date Started: January 2007
Date Completion:
Last Updated: March 4, 2014
Last Verified: March 2014
