Phase 2, Open-Label, Multi-Dose Study of Panhematin in Patients With MDS
This is a Phase II, open-label clinical trial examining the role of Panhematin® in patients with MDS. The objective of this study is to evaluate the safety and efficacy of Panhematin® (hematin for injection) in the treatment of adult patients (≥ 18 years of age) with low-risk MDS.
The study will be conducted on an outpatient basis and will consist of the following:
- A Screening Period (within 28 days of the Day 1)
- Screening bone marrow aspiration and biopsy up to 60 days prior to receiving study medication
- An 8-week Treatment Period (Days 1 through 4 of Week 1, and weekly visits during Weeks 2 through 8); partial and complete responders in any of the three cell lines may continue treatment for an additional 4 weeks
- A 6-month Post treatment Follow-up Period (monthly clinic visits during Weeks 12 40)
|Study Design:||Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
|Official Title:||A Phase 2, Open-Label, Multiple-Dose Study Investigating the Efficacy and Safety of Panhematin in Patients With Low or Intermediate-1 Risk Myelodysplastic Syndrome|
- Safety and Tolerability of Panhematin®. [ Time Frame: participants were followed during therapy with panhematin, and up to six months post completion of therapy, average of 8 months. ]Number of patients with no adverse events.
- Response Rate ( CR+PR) at Week 8, Based on the IWG Criteria for Response Assessment ( 2000 Version) [ Time Frame: After 8 weeks of therapy with panhematin ]
Complete response(CR): <5% blasts in the bone marrow,with normal maturation of all cell lines, Hemoglobin >11 g/dL, neutrophils>1500/mm3 platelets>100,000/mm3.
Partial response (PR): >50% decrease in blasts, or less advanced IPSS than pretreatment value, same hematological parameters as in CR.
Stable disease (SD): No evidence of disease progression in bone marrow, stable peripheral blood counts failure: Increase in bone marrow blast percentage, progression to more advanced IPSS than pretreatment and worsening of cytopenias.
- Number of Patients Demonstrating Hematological Improvement to Panhematin® at Week 4. [ Time Frame: 4 weeks after initiation of treatment with Panhematin ]
Hematological improvement (HI)
HI-Erythroid:>2 g/dL rise in hemoglobin, or transfusion independence HI-Neutrophil: Absolute increase of >500/mm3, or >100% increase HI-Platelet: Absolute increase of >30,000, or transfusion independence
HI-Erythroid:1 to 2 g/dL increase in hemoglobin or 50% decrease in transfusion dependence.
HI-P: For patients with pretreatment platelet count < 100,000/mm3, ≥ 50% increase with a net increase > 10,000/mm3 but < 30,000/mm3.
HI-N: For patients with pretreatment ANC < 1500/mm3, ≥ 100% increase, but < 500/mm3 increase.
- Hematological Improvement Rate at Week 8 as Defined by the IWG 2000 Criteria for Response Assessment, 2000 Version [ Time Frame: At 8 weeks from start of therapy ]
|Study Start Date:||May 2007|
|Study Completion Date:||January 2009|
|Primary Completion Date:||December 2008 (Final data collection date for primary outcome measure)|
The myelodysplastic syndromes (MDS), a diverse group of hematopoietic stem cell (HSC) disorders, are characterized by ineffective hematopoiesis that manifest clinically as anemia, neutropenia, and/or thrombocytopenia. MDS is most frequently observed in the elderly population (median age between 60 and 70 years) and has a male predominance. The incidence of MDS varies from 2.1 to 12.6 cases per 100,000 people per year, with an estimated prevalence of up to 55,000 patients in the United States [Catenacci, 2005; Williamson, 1994; Aul, 1998; Aul, 2001]. Patients with MDS most frequently present with symptoms of fatigue, pallor, exertional dyspnea, infection, bleeding or bruising [Catenacci, 2005].
MDS can be divided into 2 major subtypes: indolent (or early) MDS, in which pro-apoptotic forces predominate, and aggressive (or advanced) MDS, in which pro-proliferative factors are more common.
The only curative therapy for MDS is allogeneic transplantation [Catenacci, 2005; Thompson, 2005]. Curative treatments are restricted to younger, healthier individuals with histocompatible-matched donors or those able to undergo intensive chemotherapeutic regimens [Catenacci, 2005]. Recently, the FDA approved 3 agents for the treatment of this disease, Vidaza, Dacogen, and revlimid. The latter is approved for a subset of patients with MDS with del 5q abnormality, the former two are more applicable to higher risk disease. Rhu-EPO is currently available to patients with low risk MDS however, if they fail, their options are limited to the agents mentioned above, all of which have significant myelotoxic effects. Effective and less myelosuppressive treatments for low-risk MDS are needed.
We are proposing a novel approach for the treatment of patients with low-risk MDS using heme supplementation with Panhematin® (hemin for injection). Panhematin® is an iron-containing metalloporphyrin, indicated for the amelioration of recurrent attacks of acute intermittent porphyria; it acts to limit the hepatic and/or marrow synthesis of porphyrin, presumably, as a result of the inhibition of aminolevulinic acid synthetase (the enzyme which limits the rate of porphyrin/heme biosynthetic pathway) [Panhematin® Product Prescribing Information].
There are pre-clinical and clinical data to suggest that heme supplementation with Panhematin® (hematin for injection) has potential as a treatment option for patients with MDS. Preliminary data indicate hemin administration has the potential to stimulate progenitor cell growth, stimulate globin synthesis, and elevate overall hemoglobin levels. Panhematin® has been proven to be well tolerated when used therapeutically in patients with acute intermittent porphyria, and it is anticipated to be well tolerated in this patient population. For this study, selected patients will have low or intermediate 1 risk disease by IPSS, and the standard of care for MDS (supportive therapies) will be administered as needed. Measurement of serum porphyrin levels and Hgb F will be done at baseline and at week 8.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00467610
|United States, Illinois|
|Rush University Medical Center|
|Chicago, Illinois, United States, 60612|
|Principal Investigator:||Jamile Shammo, MD||Rush University Medical Center|