Study of Clinical Efficacy and Safety of Tosedostat in MDS (IST-CTI-MDS)

Phase II Clinical Study of the Clinical Efficacy and Safety of Tosedostat in Atients With Myelodysplastic Syndromes (MDS) After Failure of Hypomethylating Agent-Based Therapy

Study WCMC IST-CTI-MDS evaluates the safety and tolerability of tosedostat in adult patients with pathologically confirmed MDS (< 20% blasts in bone marrow, peripheral blood, or both) by World Health Organization (WHO) classification after failure of hypomethylating agent-based therapy.

Study Overview

• Status: Completed
• Conditions: Myelodysplastic Syndrome
• Intervention / Treatment: Drug: Tosedostat

Detailed Description

This is a single-center, open label, two-arm phase II study of clinical activity of tosedostat in adult patients with MDS who have failed prior hypomethylating agent-based therapy. Arm A is defined as Revised International Prognostic Scoring Systems (IPSS-R) very low, low, and intermediate disease. Arm B is defined as IPSS-R high or very high risk disease. The two arms are separate and will enroll simultaneously. The dose of tosedostat will be 120 mg once a day continuously for each 28 day treatment cycle. Patients will be assessed for disease response, on average, every two cycles as defined in the protocol. If patient has no response as defined by the protocol after two cycles, azacitidine 75 mg/m2 SC or IV for 5 days may be combined with tosedostat, at the investigator's discretion.The primary endpoint the study is to evaluate the safety and efficacy of tosedostat in two groups of patients with myelodysplastic syndrome who have relapsed after or are refractory or intolerant to azacitidine or decitabine. The primary endpoint for patients with IPSS-R very low, low and intermediate disease is transfusion independence and the primary endpoint for patients with high or very high risk disease is overall survival.

• Study Type: Interventional
• Enrollment (Actual): 12
• Phase: Phase 2

Contacts and Locations

Study Locations

• United States
  • New York
    • New York, New York, United States, 10065
      • Weill Cornell Medical College

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

1. Able to understand and to provide written informed consent
2. At least 18 years of age with pathologically confirmed MDS (<20% blasts in bone marrow, peripheral blood, or both) within 6 weeks prior to screening by WHO classification

3. Must have received at least 4 cycles of decitabine-based or 6 cycles of azacitidine-based therapy and are either refractory to, relapsed after or intolerant to prior therapy with either agent.

   • Primary failure/refractory: Stable or worsening disease after a minimum of 4 cycles of decitabine-based or 6 cycles of azacitidine-based therapy
   • Secondary failure/relapse: Bone marrow blast count increase or loss of hematologic response after initial treatment response with hypomethylating agent-based therapy
   • Intolerance: Intolerance of hypomethylating agent-based therapy regardless of number of cycles completed and clinical response

4. Progression (according to 2006 IWG criteria) at any time after initiation of subcutaneous or intravenous azacitidine or decitabine treatment per labeling during the past 2 years, defined as follows:

   • For patients with <5% BMBL, ≥ 50% increase in BMBL to >5% BMBL
   • For patients with 5-10% BMBL, ≥ 50% increase in BMBL to >10% BMBL
   • For patients with 10-20% BMBL, ≥ 50% increase in BMBL to >20% BMBL
   • For patients with 20-30% BMBL, ≥ 50% increase in BMBL to >30% BMBL
   • Any of the following:
   • ≥ 50% decrease from maximum remission/response levels in granulocytes or PLT
   • Decrease in Hgb concentration by ≥2 g/dL
   • Transfusion dependence, defined as administration of at least 4 RBC units in the past 8 weeks before Screening (patients must have Hgb values < 9 g/dL prior to transfusion to be considered), in the absence of another explanation.
5. Has failed to respond to, relapsed following, not eligible, or opted not to participate in BM transplantation
6. Patients with very low, low or intermediate risk MDS by the IPSS-R must be transfusion-dependent, with a packed red blood cell requirement of ≥ 2 units/month
7. Off azacitidine or decitabine for at least 2 weeks, off all other treatments for MDS for at least 4 weeks. Filgrastim (G-CSF) and EPO are allowed before and during the study as clinically indicated
8. Eastern Cooperative Oncology Group (ECOG) performance status of 0-3

9. Subjects must have adequate hepatic and renal function including the following:

   • Total bilirubin ≤ 1.5 x upper limit of normal (in the absence of Gilbert's syndrome)
   • AST and ALT ≤ 2.5 x upper limit of normal
   • Serum creatinine ≤ 1.5 x upper limit of normal
10. Must have acceptable recovery from clinically significant non-hematologic toxicity after prior therapy.
11. Must have a life expectancy of at least 2 months
12. Screening left ventricular ejection fraction (LVEF) greater than 50% as documented by transthoracic echocardiogram (TTE)
13. Female subject of child-bearing potential and male subjects with female partners of reproductive potential must use acceptable contraceptive methods (hormonal or barrier method of birth control; abstinence) for the duration of time on study and continue to do so for a further 3 months after the end of tosedostat treatment. Should a female subject become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately.
14. Able to comply with all study procedures during the study including all visits and tests
15. Willing to adhere to the prohibitions and restrictions specified in this protocol
16. Patient must sign an informed consent form (ICF) indicating that s/he understands the purpose of and procedures required for the study and is willing to participate.

Exclusion Criteria:

1. Presence of AML (≥20% blasts in bone marrow, peripheral blood, or both)
2. Presence of serious illness, medical condition, or other medical history, involving the heart, kidney, liver, or other organ system, including abnormal laboratory parameters, which, in the opinion of the Investigator, would be likely to interfere with a subject's participation in the study or with the interpretation of the results.
3. Have known active central nervous system disease or active, uncontrolled, clinically significant infection(s)
4. Have other active malignancies (including other hematologic malignancies) or other malignancies within 12 months before enrollment, except non-melanoma skin cancer or cervical intraepithelial neoplasia
5. Are receiving any other investigational therapy or protocol-prohibited therapy
6. Have received previous treatment with tosedostat
7. Pregnant or breastfeeding females
8. Any prior or co-existing medical condition that in the Investigator's judgment will substantially increase the risk associated with the subject's participation in the study
9. Psychiatric disorders or altered mental status precluding understanding of the informed consent process and/or completion of the necessary study procedures

10. Significant* cardiovascular disease defined as:

    • Active heart disease including myocardial infarction within 6 months prior to study entry
    • Symptomatic coronary artery disease
    • Uncontrolled or clinically significant arrhythmia, angina, congestive heart failure
    • Presence of clinically significant valvular heart disease
    • Presence of clinically significant conduction defect on screening ECG
    • Uncontrolled hypertension (i.e., systolic BP >160mmHg, diastolic >90 mmHg in repeated measurements) despite adequate therapy
    • Clinically significant atrial fibrillation * Grade 3/4 in the CTCAE v4.0 grading would generally be considered clinically significant, although this remains a judgment for the Investigator to make.
11. LVEF ≤ 50%
12. Baseline troponin I and b-type natriuretic peptide > Grade I
13. Prior exposure cardiotoxic agent, such as anthracycline, within 3 months of enrollment
14. Concomitant use of drugs that prolong QT/QTc interval except antibiotics, antifungals, and other antimicrobials used as standard of care for the treatment and prevention of infection and/or other such drugs clinically indicated for patient care. When use of concomitant medications with QT-prolonging potential is necessary, ECG must be repeated 4 hours post-dose on Day 1, on Day 3, and on Day 7, and as clinically indicated, relative to start of agent with QT-prolonging potential.
15. Gastrointestinal disorders that may interfere with absorption of drug
16. Active serious infection or sepsis
17. Clinically significant interstitial lung disease

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: All Patients; Tosedostat 120 mg PO once daily will be administered.	Drug: Tosedostat; 120 mg PO once daily continuously for each 28 day treatment cycle; Other Names: CHR-2797

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Over All Survival	Survival following treatment to the date of death, assessed up to a period of 3-4 years.	from start of treatment until death, assessed up to a period of 3-4 years.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Overall Response	Overall response according to IWG 2006 criteira	Approximately 3 years
One Year and Two Year Survival		from start of treatment to 1 year and 2 years post treatment initiation

Collaborators and Investigators

• Sponsor: Weill Medical College of Cornell University
• Collaborators: CTI BioPharma
• Investigators: Principal Investigator: Gail Roboz, MD, Weill Medical College of Cornell University

Publications and helpful links

General Publications

• Lee S, Desai P, Edirisinghe B, Pianello S, Curcio T, Samuel M, Ritchie EK, Roboz GJ. Phase II study of the clinical efficacy and safety of tosedostat in patients with myelodysplastic syndromes (MDS) after failure of hypomethylating agent-based therapy. Leuk Lymphoma. 2021 Feb;62(2):498-500. doi: 10.1080/10428194.2020.1832674. Epub 2020 Oct 10. No abstract available.

Study record dates

Study Major Dates

• Study Start (Actual): March 20, 2015
• Primary Completion (Actual): October 25, 2017
• Study Completion (Actual): October 25, 2017

Study Registration Dates

• First Submitted: January 28, 2015
• First Submitted That Met QC Criteria: May 19, 2015
• First Posted (Estimate): May 22, 2015

Study Record Updates

• Last Update Posted (Actual): June 12, 2018
• Last Update Submitted That Met QC Criteria: June 7, 2018
• Last Verified: June 1, 2018

More Information

Terms related to this study

• Keywords: MDS
• Additional Relevant MeSH Terms: Pathologic Processes; Neoplasms; Disease; Bone Marrow Diseases; Hematologic Diseases; Precancerous Conditions; Syndrome; Myelodysplastic Syndromes; Preleukemia; Molecular Mechanisms of Pharmacological Action; Enzyme Inhibitors; Tosedostat
• Other Study ID Numbers: 1409015482

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO