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Adult T Cell LeukemiaPhase 2NCT01378871

A Phase II Study Of Imtox-25 In Adults With Refractory/Relapsed Cd25 Positive Adult T Cell Leukemia/Lymphoma

A Phase 2 study testing IMTOX-25 in people with Adult T Cell Leukemia and Adult T Cell Lymphoma, run by Amit Verma at 7 sites in United States.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

This clinical trial will be a multicenter phase II fixed-dose trial in which a minimum of 10 patients with immunophenotypically confirmed ATL with at least 50% of the blasts expressing CD25 as measured by flow cytometry at relapse, will receive Imtox-25. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Adult T Cell Leukemia, Adult T Cell Lymphoma
What is being tested?
IMTOX-25
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
1 participants
Where
7 sitesUnited States
Study dates
Sep 2010to Jan 2013
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age > 17 years inclusive at the time of original diagnosis of HTLV-1 associated ATL.
  • Histologic verification of ATL and HTLV-1 sero-positivity at diagnosis and either evidence of relapse/refractory disease based on a Bone Marrow/Peripheral Blood examination or evidence by flow cytometry.
  • Disease refractory to conventional CHOP based therapy or transplantation or deemed ineligible for salvage by transplantation.
  • Presence of CD25 on at least 50% of the lymphoblasts obtained via BMA or peripheral blood as determined by flow cytometry.
  • ECOG performance status 2.
  • Life expectancy of > 2 months.
Show all 15Show fewer
  • Patients must have recovered from effects of prior therapy. At least 2 weeks should have elapsed since the last dose of chemotherapy (4 weeks in the case of nitrosourea-containing therapy). Steroids are considered as chemotherapy. However, if the patient has recovered from the side effects of prior therapy and has had a > 50% rise in peripheral blast count, they are immediately eligible. The 50% rise in peripheral blast count must be calculated as follows. The sample for the baseline peripheral blast count must have been taken at least 24 hours after the end of chemotherapy. The sample for the peripheral blast count that is increased by 50% of the baseline peripheral blast count may be taken at any subsequent time. A second peripheral blast count confirming the 50% rise is recommended.
  • No hematopoietic limitations as patients with relapsed leukemia routinely have pancytopenia and ITs have not demonstrated hematopoietic toxicity.
  • Adequate renal function defined as a serum creatinine 1.5 x normal range.
  • Adequate liver function defined as a total bilirubin 1.5 x normal range and SGOT (AST) or SGPT (ALT) 1.5 x normal range.
  • Adequate cardiac function defined as a shortening fraction of 27% by echocardiogram, or ejection fraction of 35-40% by MUGA scan.
  • Adequate pulmonary function defined as no evidence of dyspnea at rest.
  • Normal neurological exam.
  • Patient and/or legal guardian must sign a written informed consent.
  • All institutional, FDA, and NCI requirements for human studies must be met.

Who cannot join

  • Presence of leukemic or infectious pulmonary parenchymal disease or presence of a pulmonary effusion by chest x-ray.
  • Presence of CNS involvement with leukemia.
  • History of documented seizure disorder or abnormal neurological examination.
  • Human anti-mouse (HAMA) levels of < 1 μg/ml.

Trial locations and contacts

7 sites in 1 country.

7 sites in 1 country

United States7 sites

  • Albert Einstein Cancer Center at Albert Einstein College of Medicine

    The Bronx, New York, 10461

  • Albert Einstein Cancer Center

    The Bronx, New York, 10461

  • Albert Einstein Comprehensive Cancer Center

    The Bronx, New York, 10461

  • Montefiore Medical Center

    The Bronx, New York, 10461

  • Albert Einstein Clinical Cancer Center

    The Bronx, New York, 10467

  • Montefiore Medical Center-

    The Bronx, New York, 10467

  • Montefiore Medical Center

    The Bronx, New York, 10467

Other trials in United States

About this study

Official title: Phase II Study of Therapy With IMTOX-25 in Adults With Refractory/Relapsed Cd25 Positive Adult T Cell Leukemia/Lymphoma

This clinical trial will be a multicenter phase II fixed-dose trial in which a minimum of 10 patients with immunophenotypically confirmed ATL with at least 50% of the blasts expressing CD25 as measured by flow cytometry at relapse, will receive Imtox-25. Patients are eligible for repeat courses of treatment every two weeks if they do not experience a dose limiting toxicity (DLT) as defined in Section 5.2 and do not have a HAMA/HARA level > 1 μg/ml. The treatment will be administered in the in-patient setting. If no response is observed among the initial 9 patients, the study would be terminated early and declared negative; if at least one response is observed, accrual would continue to a total of 17 evaluable patients (total study size=19 to account for 10% of the patients being unevaluable for any reason).

Read the detailed description

Adult T Cell Leukemia/Lymphoma (ATL) is a lymphoproliferative disease associated with HTLV-1 infection, characterized by circulating malignant cells expressing the IL-2 receptor (CD25). Prognosis for patients with ATL remains poor despite advances in chemotherapy, with survival in leukemic patients ranging from six months to less than one year. Novel agents that are potent and specific for the tumor cells are urgently needed to improve overall survival and decrease toxicity in this dismal disease. One therapeutic approach would be to use immunotoxins (ITs). ITs utilize a potent toxin linked to a targeting moiety designed to maximize drug delivery to the tumor cells, thus avoiding the nonspecific toxicity of conventional chemotherapeutic agents. Imtox-25 is constructed using the RFT5 murine monoclonal antibody (Mab) coupled to deglycosylated ricin-A chain (dgA) via the heterobifunctional, thiol-containing crosslinker, 4[(succinimidyloxy) carbonyl]-ƒÑ-methyl-ƒÑ-(2 pyridyldithio) toluene (SMPT). Phase I and II clinical studies with Imtox-25 (RFT5.dGA) have been shown safety and efficacy in adult patients with Hodgkin¡¦s disease and a recommended Phase II dose has been established.. In vitro experiments using ATL cell lines and in vivo studies in a murine xenograft model have demonstrated significant activity of Imtox-25 in this disease. Based on these results, the investigators propose to conduct a phase II trial utilizing Imtox-25 in adults with relapsed or refractory ATL.

Being tested
IMTOX-25
Keywords
T Cell, T-Cell, Leukemia, Lymphoma, Leukemia/Lymphoma, ATL
Medical subject headings
Precursor T-Cell Lymphoblastic Leukemia-Lymphoma, Leukemia, Lymphoma

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • IMTOX-25Drug

    Also called RFT5-dgA

    This agent is supplied as a sterile solution at 0.5 mg/ml. Thus a vial with 5 mL contains 2.5 mg IMTOX-25

    IMTOX-25 is an immunotoxin. It is an antibody that is bound to a piece of the poison ricin. This antibody have been shown to bind to leukemia cells and kill them because of the ricin.

    15 mg/m²/cycle IV. The calculated total dose for the cycle will be divided by four and given on Days 1, 3, 5 and 7.

Study groups in NCT01378871
Study groupRoleWhat they receive
Antibody TherapyExperimentalTreatment with Imtox-25 intravenously over 4 hours every other day for 4 doses. Hospital admission is required during this treatment.
Receives: Drug: IMTOX-25

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Overall Response of Imtox-25

    To determine any anti-tumor activity of Imtox-25 in relapsed/refractory ATL patients within the confines of a Phase II study as defined by overall response

    Measured: 28 days

Secondary outcomes (1)

  1. Toxicity and Affect of Treatment

    To determine the toxicity of Imtox-25 in ATL patients To measure levels of human anti-mouse (HAMA) and human anti-dgA (HARA) antibodies.

    To determine whether the expression of the CD25 cell surface antigens is affected by treatment with Imtox-25 using flow cytometric analysis of lymphoblasts in peripheral blood and bone marrow

    Measured: 28 days +

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted23 Jun 2011 (estimated)
  2. Study startSep 2010
  3. Primary completionJan 2013
  4. Study completionJan 2013

Why it stopped: IND withdrawn

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
1 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01378871
Sponsor's protocol ID
2009-530
Status last verified
May 2023
First submitted
12 May 2011
Last updated
9 Jun 2023
Data monitoring committee
No

Publications

  • Taylor GP, Matsuoka M. Natural history of adult T-cell leukemia/lymphoma and approaches to therapy. Oncogene. 2005 Sep 5;24(39):6047-57. doi: 10.1038/sj.onc.1208979.

    PubMed 16155611

  • Waldmann TA, Goldman CK, Bongiovanni KF, Sharrow SO, Davey MP, Cease KB, Greenberg SJ, Longo DL. Therapy of patients with human T-cell lymphotrophic virus I-induced adult T-cell leukemia with anti-Tac, a monoclonal antibody to the receptor for interleukin-2. Blood. 1988 Nov;72(5):1805-16.

    PubMed 2846094

  • Waldmann TA, White JD, Goldman CK, Top L, Grant A, Bamford R, Roessler E, Horak ID, Zaknoen S, Kasten-Sportes C, et al. The interleukin-2 receptor: a target for monoclonal antibody treatment of human T-cell lymphotrophic virus I-induced adult T-cell leukemia. Blood. 1993 Sep 15;82(6):1701-12.

    PubMed 8400227

  • Gill PS, Harrington W Jr, Kaplan MH, Ribeiro RC, Bennett JM, Liebman HA, Bernstein-Singer M, Espina BM, Cabral L, Allen S, et al. Treatment of adult T-cell leukemia-lymphoma with a combination of interferon alfa and zidovudine. N Engl J Med. 1995 Jun 29;332(26):1744-8. doi: 10.1056/NEJM199506293322603.

    PubMed 7760890

  • Thrush GR, Lark LR, Clinchy BC, Vitetta ES. Immunotoxins: an update. Annu Rev Immunol. 1996;14:49-71. doi: 10.1146/annurev.immunol.14.1.49.

    PubMed 8717507

  • Ghetie V, Ghetie MA, Uhr JW, Vitetta ES. Large scale preparation of immunotoxins constructed with the Fab' fragment of IgG1 murine monoclonal antibodies and chemically deglycosylated ricin A chain. J Immunol Methods. 1988 Sep 13;112(2):267-77. doi: 10.1016/0022-1759(88)90367-5.

    PubMed 3262139

  • Barth S, Schnell R, Diehl V, Engert A. Development of immunotoxins for potential clinical use in Hodgkin's disease. Ann Oncol. 1996;7 Suppl 4:135-41. doi: 10.1093/annonc/7.suppl_4.s135.

    PubMed 8836425

  • Winkler U, Gottstein C, Schon G, Kapp U, Wolf J, Hansmann ML, Bohlen H, Thorpe P, Diehl V, Engert A. Successful treatment of disseminated human Hodgkin's disease in SCID mice with deglycosylated ricin A-chain immunotoxins. Blood. 1994 Jan 15;83(2):466-75.

    PubMed 8286745

  • Engert A, Diehl V, Schnell R, Radszuhn A, Hatwig MT, Drillich S, Schon G, Bohlen H, Tesch H, Hansmann ML, Barth S, Schindler J, Ghetie V, Uhr J, Vitetta E. A phase-I study of an anti-CD25 ricin A-chain immunotoxin (RFT5-SMPT-dgA) in patients with refractory Hodgkin's lymphoma. Blood. 1997 Jan 15;89(2):403-10.

    PubMed 9002941

  • Schnell R, Vitetta E, Schindler J, Borchmann P, Barth S, Ghetie V, Hell K, Drillich S, Diehl V, Engert A. Treatment of refractory Hodgkin's lymphoma patients with an anti-CD25 ricin A-chain immunotoxin. Leukemia. 2000 Jan;14(1):129-35. doi: 10.1038/sj.leu.2401626.

    PubMed 10637488

  • Martin PJ, Pei J, Gooley T, Anasetti C, Appelbaum FR, Deeg J, Hansen JA, Nash RA, Petersdorf EW, Storb R, Ghetie V, Schindler J, Vitetta ES. Evaluation of a CD25-specific immunotoxin for prevention of graft-versus-host disease after unrelated marrow transplantation. Biol Blood Marrow Transplant. 2004 Aug;10(8):552-60. doi: 10.1016/j.bbmt.2004.04.002.

    PubMed 15282533

  • Amrolia PJ, Mucioli-Casadei G, Huls H, Heslop HE, Schindler J, Veys P, Vitetta ES, Brenner MK. Add-back of allodepleted donor T cells to improve immune reconstitution after haplo-identical stem cell transplantation. Cytotherapy. 2005;7(2):116-25. doi: 10.1080/14653240510018181.

    PubMed 16047416

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing IMTOX-25 in people with Adult T Cell Leukemia and Adult T Cell Lymphoma, run by Amit Verma at 7 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 15 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 9 Jun 2023. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 7 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 9 Jun 2023). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Overall Response of Imtox-25 (time frame: 28 days). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT01378871, which also lists 12 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Jun 2023.

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