PIAPL: Proteasome Inhibition in Acute Promyelocytic Leukemia

Sponsor

Christian Medical College, Vellore, India (Other)

Overall Status

Unknown status

CT.gov ID

NCT01950611

Collaborator

(none)

Enrollment

Location

Arm

Duration (Months)

0.5

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

The clinical outcome of relapsed acute promyelocytic leukemia (APL) is poor with current standard of care approaches. Additionally, standard of care warrants an autologous stem cell transplant to be done once molecular remission is achieved. Unfortunately, the majority of our patients cannot afford this procedure. We have previously reported the clinical outcome of relapsed patients who were managed without a stem cell transplants and showed that the event free survival at 5 years is less than 35%. Pre-clinical data reported from our laboratory demonstrates that there is significant synergy between arsenic trioxide (ATO; which is the accepted standard of care agent for relapsed APL) and Bortezomib (a proteasome inhibitor). We have evaluated this combination extensively in-vitro and this data was accepted as an oral presentation at the American Society of Hematology (ASH) meeting in 2011. More recently we have also reported the potential mechanism for this synergy (Poster at ASH 2012). We also have mouse model data which supports these findings. We plan to move this combination of ATO based therapy combined with Bortezomib to a Phase II clinical trial to validate these observations. The anticipated potential is that we will have a combination therapy that is less expensive, cost effective and safe with comparable clinical outcomes to those treated with the more expensive standard of care which includes an autologous stem cell transplant and which the majority of our patients cannot afford.

Condition or Disease	Intervention/Treatment	Phase
Relapsed Acute Promyelocytic Leukemia	Drug: Bortezomib	Phase 2

Study Design

Study Type:

Interventional

Anticipated Enrollment :

30 participants

Allocation:

N/A

Intervention Model:

Single Group Assignment

Masking:

None (Open Label)

Primary Purpose:

Treatment

Official Title:

Phase II Study to Evaluate the Role of Bortezomib in the Management of Relapsed Acute Promyelocytic Leukemia

Study Start Date :

May 1, 2013

Anticipated Primary Completion Date :

May 1, 2018

Anticipated Study Completion Date :

May 1, 2018

Arms and Interventions

Arm	Intervention/Treatment
Experimental: Bortezomib in treatment	Drug: Bortezomib Combination of arsenic trioxide with bortezomib in the treatment of relapsed acute promyelocytic leukemia

Arm

Intervention/Treatment

Experimental: Bortezomib in treatment

Drug: Bortezomib

Combination of arsenic trioxide with bortezomib in the treatment of relapsed acute promyelocytic leukemia

Outcome Measures

Primary Outcome Measures

Safety [5 years]
Non hematological toxicity to be monitored

Secondary Outcome Measures

Efficacy [5 years]
Proportion of patients that achieve molecular remission at the end of induction Relapse free, event free and overall survival on long term follow up with this protocol. Long term toxicity profile of this combination therapy Duration of cytopenia with this combination in induction Documentation of support care required and total cost of administering this regimen. Performance status prior to consolidation therapy, each maintenance course and at the end of the regimen. Molecular remission status on follow up for 5 years

Eligibility Criteria

Criteria

Ages Eligible for Study:

1 Year to 75 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Inclusion Criteria:

Diagnosis of relapsed t(15;17)(PML-RARα) positive APL confirmed by reverse transcriptase polymerase chain reaction (RT-PCR).
Normal cardiac function with normal electrocardiogram (QTc less than 500 msec) within 48 hours of study entry.
Patient or guardian willing to give informed consent / assent. Must not have a psychiatric disorder(s) that would interfere with consent, study participation, or follow-up.
Patients may have received hydroxyurea, 48 hours or less of all trans retnoic acid (ATRA), and 1 dose of an anthracycline and still be eligible for participation in this study.
Life expectancy of at least 2 weeks after entry on study. vi. No age limit for entry into study. vii. ECOG performance score 0, 1, or 2. viii. Fertile patients must agree to use an effective barrier method of contraception (e.g., latex condom, diaphragm, or cervical cap) to avoid pregnancy while on therapy and for 3 years following the discontinuation of therapy.
Have a negative serum or urine pregnancy test prior to the first dose of therapeutic drugs (if patient is a female of childbearing potential). If breast feeding they should be willing to stop breast feeding.

Exclusion Criteria:

Intracranial bleed at diagnosis. ii. ECOG performance score 3 and above. iii. Severe uncontrolled infection, fulminant sepsis at diagnosis or documented pneumonia.
History of cardiac arrhythmia; symptomatic coronary heart disease; uncontrollable arterial hypertension (diastolic blood pressure > 115 mm Hg); severe psychiatric disease or other concomitant diseases which do not comply with the criteria for the participation in the study.
Acute hepatitis (Bilirubin ≥ 5mg% or liver enzymes ≥ 4 times above laboratory normal value) vi. Acute renal failure or serum creatinine ≥ 2 mg% not reversed by hydration. vii. Patients suffering from an additional malignant tumor. No past history of receiving therapy for another malignancy, apart from squamous cell carcinoma or basal cell carcinoma of the skin.
Pregnancy or lactation. ix. Patients with proven intolerance to the study drugs x. Inability, missing willingness or anticipated lack of compliance by the PI to participate in the study. Must not have any other severe concurrent disease and/or uncontrolled medical conditions, which, in the judgment of the investigator, could predispose patients to unacceptable safety risks or compromise compliance with the protocol.