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Brief Title: A Phase I Extension Trial of Repeated Infusions of ISF35
Official Title: A Phase 1B Extension Trial to Allow Repeat Dosing of Autologous CLL B Cells Transduced to Express Chimeric CD154 (ISF35) in Subjects Previously Treated in MDACC Protocol 2004-0914
Study ID: NCT00783588
Brief Summary: The study is a Phase Ib extension trial that will assess the toxicity, tolerability, and safety of up to two repeated administrations of 1x10\^8, 3x10\^8, or 1x10\^9 autologous Ad-ISF35-transduced CLL B cells given intravenously to patients with CLL who tolerated ISF35 in the prior Phase I infusion trial at M.D. Anderson.
Detailed Description: In a previous Phase I clinical trial at M.D. Anderson, patients with CLL received an intravenous infusion of autologous leukemia cells transduced ex vivo with an adenovirus encoding the wild-type murine CD154. This treatment was well tolerated and without dose-limiting toxicity. Patients each experienced acute reductions in the leukemia-cell blood count and in the size of enlarged lymph nodes and spleen. The infusion induced changes in circulating bystander, non-infected CLL cells and both acute and long-term clinical responses. The changes in bystander CLL cells were similar to those observed in CLL cells following ligation of CD40, which included enhanced or de novo expression of CD54, CD80, and CD86, allowing the modified CLL cells to function more effectively in presenting antigens to autologous T cells. Following CD40 ligation, CLL cells are induced to express CD95 and DR5 and to undergo changes in expression of pro- and anti-apoptotic proteins, ultimately favoring apoptosis in the CLL cells. To build upon these results, an extension to this trial will be completed in order to assess the tolerability of repeated infusions of ISF35 and to test whether additional administrations will enhance the anti-leukemic activity exhibited in the previous Phase I trial.
Minimum Age: 18 Years
Eligible Ages: ADULT, OLDER_ADULT
Sex: ALL
Healthy Volunteers: No
University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States
Name: William G. Wierda, M.D., Ph.D.
Affiliation: M.D. Anderson Cancer Center
Role: PRINCIPAL_INVESTIGATOR