A Phase I Trial of Autologous CLL B Cells Transduced to Express Chimeric CD154 (ISF35)

Chronic Lymphocytic Leukemia Clinical Trial

Official title:

A Phase I Trial of Autologous CLL B Cells Transduced to Express Chimeric CD154 (ISF35)

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00779883
• Other study ID #: CLL-35-101
• Status: Completed
• Phase: Phase 1
• First received: October 23, 2008
• Last updated: October 23, 2008
• Start date: June 2006
• Est. completion date: March 2008

Study information

• Verified date: October 2008
• Source: Memgen, LLC
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Food and Drug Administration
• Study type: Interventional

Clinical Trial Summary

The study is a Phase I, dose-escalating, non-randomized, single institution clinical trial assessing the safety and efficacy of autologous Ad-ISF35-transduced CLL B cells administered as a single intravenous infusion in patients with chronic lymphocytic leukemia (CLL).

Description:

Memgen's first TNF family derived product, ISF35, is a gene that encodes a recombinant protein molecule that binds and activates human CD40+ B lymphocytes that are found on a vast majority of malignant leukemias and lymphomas.

In this clinical trial, ISF35 will be introduced into the patients' CLL cells ex vivo using a replication-defective adenovirus Ad5 encoding the ISF35 cDNA transgene. After this ex vivo manipulation, the modified leukemia cells will be extensively washed and the amount of remaining free virus is measured before the cells are reinfused into the patient. Following ex vivo transduction, the CLL cells expressing ISF35 activate a therapeutic immune response directed against the target leukemia cells.

This ascending-dose trial will be divided into three dosing cohorts to determine the existence of a maximum tolerated dose.

Patients will be followed for 12 months after ISF35 administration or until initiation of another treatment.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 9
• Est. completion date: March 2008
• Est. primary completion date: March 2008
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

1. Subjects must have a diagnosis of B cell CLL, measurable disease, and an

NCI-WG indication for treatment with one of the following:

• Massive (>6 cm below left costal margin) or progressive splenomegaly;

• Massive (>10 cm longest diameter) lymph nodes, nodal clusters, or progressive lymphadenopathy;

• Progressive anemia;

• Progressive thrombocytopenia;

• Weight loss > 10% body weight over the preceding 6 month period;

• Fatigue attributable to CLL;

• Fever or night sweats without evidence of infection;

• Progressive lymphocytosis.

2. Subjects must be age 18 years or older.

3. Women of childbearing potential (not postmenopausal for at least one year or not surgically incapable of bearing children) must agree not to become pregnant for the duration of the study. Both men and women participants must agree to use contraception for the duration of the study.

4. Subjects must have Zubrod performance status of = 2 (Appendix B).

5. Subjects must have adequate hematologic, renal, hepatic, and coagulation function:

• Adequate hematologic function:

• Platelet count = 50,000/µl; AND

• Hemoglobin = 10 g/dl (may be supported by erythropoietin or transfusion).

• Adequate renal function:

• Serum creatinine = 1.5 times upper limit of normal; OR

• Measured creatinine clearance = 40 mL/min/1.73 m^2.

• Adequate hepatic function:

• Total bilirubin = 2.5 times upper limit of normal; AND

• ALT = 2.5 times upper limit of normal; AND

• Adequate coagulation tests:

• Prothrombin time international normalized ratio (INR) = 2; AND

• Partial thromboplastin time = 1.66 times upper limit of normal

6. Subjects must be able to give written informed consent.

Exclusion Criteria:

1. Presence of more than 55% prolymphocytes.

2. Chemotherapy (e.g., purine analogues, alkylating agents, or corticosteroids), antibody therapy, immunotherapy, radiation therapy, or participation in any investigational drug treatment within 4 weeks of enrollment into protocol or at any time during the study.

3. Ongoing toxicity from prior anti-neoplastic therapy.

4. Prior gene therapy or allogeneic stem cell transplantation.

5. Untreated autoimmune hemolytic anemia or immune thrombocytopenia.

6. Active infection requiring parenteral antibiotics.

7. Known HIV/HBV/HCV seropositivity.

8. Uncompensated hypothyroidism (defined as TSH greater than 4x upper limit of normal not treated with replacement hormone).

Study Design

Allocation: Non-Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Chronic Lymphocytic Leukemia
• Leukemia, Lymphocytic, Chronic, B-Cell
• Leukemia, Lymphoid

Intervention

Biological:
• ISF35
Subjects participating in this study will receive a single dose of 1x10^8, 3x10^8, or 1x10^9 autologous Ad-ISF35-transduced CLL B cells.

Locations

Country	Name	City	State
United States	University of Texas M.D. Anderson Cancer Center	Houston	Texas

Sponsors (1)

Lead Sponsor	Collaborator
Memgen, LLC

Country where clinical trial is conducted

United States, 

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* Note: There are 53 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Assess the toxicity, tolerability, and safety of 1x10^8, 3x10^8, and 1x10^9 autologous Ad-ISF35-transduced CLL B cells given as a single intravenous infusion in patients with CLL.		Duration of the trial	Yes
Secondary	Assess the anti-leukemia activity of a single intravenous dose by evaluating reduction in leukemia count, reduction in adenopathy and splenomegaly, and improvement in bone function.		Duration of the trial	No
Secondary	Assess the quality of life with ISF35 treatment.		Two months	No
Secondary	Assess pharmacodynamic endpoints including induction of T cell anti-leukemia immune responses, antibody production against autologous CLL B cells, and changes in bystander leukemia cell phenotype.		Two months	No