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Low Dose CdA Combined With Valproic Acid (VPA) in Previously Treated B-cell Chronic Lymphocytic Leukemia(B-CLL)

NCT01295593 · Status: UNKNOWN · Phase: PHASE1/PHASE2 · Type: INTERVENTIONAL · Enrollment: 33

Last updated 2012-06-07

No results posted yet for this study

Summary

Rationale New chemotherapeutic agents are needed in relapsing B-Cell Chronic Lymphocytic Leukemia (B-CLL) to overcome resistance of CLL cells. Valproic acid (VPA) is an inhibitor of histone deacetylase (HDAC) used as an anticonvulsant and mood-stabilizing drug for decades. VPA mediates apoptosis in CLL cells through caspase activation. VPA shows toxicity toward CLL cells displaying alterations in the p53 pathway. The combination of VPA with fludarabine or 2-Chlorodeoxyadenosine (CdA, Cladribine) results in synergistic loss of B-CLL cell viability, and significant increase in apoptosis. The highest index of synergism is observed between VPA and CdA, a purine nucleoside analog active in B-CLL.

Study design Overall, the study will be proposed to previously treated patients with advanced B-CLL, who are not eligible for aggressive approaches, and who exhibit progressive disease. A total of 33 patients will be included. Estimated enrolment time is 2 years.

* First part: It is planned to start therapy with single VPA during 2 months, targeting plasma levels that have been reported to be active in vitro toward CLL cells (but that do not exceed therapeutic levels in seizure prevention), and in parallel, to verify whether cellular targets of VPA have been actually inhibited in leukemic B-lymphocytes.
* Second part: After the VPA preloading period (2 months), patients will be evaluated to receive CdA. CdA will be given at 5.6 mg/m²/day intravenously during 3 days, a reduced-dose schedule which is less toxic - at no obvious cost of loss of efficacy - as compared to the standard dosage of 5 days. CdA was chosen because it displays the highest level of in vitro synergism with VPA. Four monthly courses of CdA will be given. Patients will then be evaluated. VPA will be stopped at the time of response evaluation (scheduled 28 days after the last course of CdA).

Conditions

Interventions

DRUG

valproic acid and 2-chlorodeoxyadenosine

VPA : daily, oral, starting dose 10mg/kg/day total dose, taken in 2 separate administrations of around 5 mg/kg/day each, for a maximum of 6 months CdA : 5.6 mg/m²/day IV during 3 days, every 28 days, for a maximum of 4 cycles

Sponsors & Collaborators

  • Cliniques universitaires Saint-Luc- Université Catholique de Louvain

    lead OTHER

Principal Investigators

  • Eric Van Den Neste, MD, PhD · Cliniques universitaires Saint-Luc- Université Catholique de Louvain

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2010-12-31
Primary Completion
2013-04-30
Completion
2013-04-30

Countries

  • Belgium

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01295593 on ClinicalTrials.gov