A Maintenance Extension of Phase I Pilot Study of Chimeric Anti-CD4 Antibody M-T412 in Patients With Multiple Sclerosis

Study Overview
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Brief Summary
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OBJECTIVES: I. Evaluate the safety and immunogenicity of single and multiple doses of M-T412, a chimeric murine-human anti-CD4 monoclonal antibody, in patients with multiple sclerosis. II. Evaluate the pharmacokinetics of M-T412. III. Obtain preliminary data on the clinical response to M-T412.

Detailed Description
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PROTOCOL OUTLINE: This is an open label, dose escalating study. Escalating doses of M-T412 are administered to cohorts of 5 patients each receiving a single dose intravenously over 2 hours. Patients who complete the single dose assessment of M-T412 may receive up to 3 additional single doses of M-T412 IV over 2 hours, with each repeated dose given at least 1 month apart. Then, patients receive one dose level of M-T412 IV over 2 hours at 3 month intervals over a period of 12 months for a total of 5 doses. Once recovery of CD4 cells is obtained, the next scheduled infusion of M-T412 begins. Patients are omitted from study if CD4 cells remain attenuated following 2 scheduled infusion sessions. Patients are followed at 3, 6, 12, and 24 months after the first infusion.

Conditions
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Multiple Sclerosis

Intervention / Treatment
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* Drug: monoclonal antibody M-T412


Participation Criteria
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Eligibility Criteria
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PROTOCOL ENTRY CRITERIA: --Disease Characteristics-- Diagnosis of chronic, advanced, progressive multiple sclerosis (MS) --Prior/Concurrent Therapy-- Biologic therapy: No sensitivity to murine proteins No prior treatment at any time with anti-CD4 antibodies, other murine antibodies, or other anti-T cell antibodies (e.g., xenologous or human) At least 4 weeks since use of other biological agents Chemotherapy: No concomitant chemotherapy At least 3 months since prior chemotherapy Endocrine therapy: No concomitant steroidal therapy At least 3 months since prior steroidal therapy Radiotherapy: No total lymphoid irradiation prior to study No concomitant radiotherapy At least 3 months since prior radiotherapy Other: No use of investigational drugs within 30 days prior to study --Patient Characteristics-- Age: 21 to 75 Hematopoietic: Hemoglobin at least 10 g/dL WBC at least 4000/mm3 Granulocyte count at least 1500/mm3 Platelet count at least 100,000/mm3 CD4+ lymphocyte count at least 300 cells/mm3 Other: Not pregnant or lactating Effective contraception required of fertile patients for 3 months prior to and during study No substance abuse (e.g., drug or alcohol) Not HIV positive No AIDS-Related Complex (ARC) No serum antibodies to HIV Negative serum antibody test for HIV within 1 month prior to study No underlying medical or psychiatric condition

Ages Eligible for Study
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Minimum Age: 21 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Masking: None (Open Label)


Arms and Interventions

| Intervention/Treatment |
| --- |
|Drug: monoclonal antibody M-T412|nan|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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multiple sclerosis, neurologic and psychiatric disorders, rare disease