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WT1 TCR Gene Therapy for Leukaemia: A Phase I/II Safety and Toxicity Study

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT01621724
Recruitment Status : Completed
First Posted : June 18, 2012
Last Update Posted : October 2, 2018
University College, London
Cell Therapy Catapult
Information provided by (Responsible Party):
Cell Medica Ltd

Brief Summary:

WT1 TCR gene therapy is a new treatment for acute myeloid leukaemia and chronic myeloid leukaemia.

Patient's white blood cells (T cells) are modified to specifically fight the leukaemia cells by transferring a gene into the T cells, which allows them to recognize fragments of a protein called WT1. This protein is present on the surface of leukaemia cells at very high levels. The gene transferred to the T cells enables them to make a new T cell receptor (TCR), which will allow them to attack leukaemia cells with high levels of WT1 on their surface.

Using this form of gene therapy the investigators can convert some of the patient's immune system's own T cells into T cells that the investigators hope will be much more effective at recognizing and killing leukaemia cells.

Condition or disease Intervention/treatment Phase
Acute Myeloid Leukaemia Chronic Myeloid Leukaemia Genetic: WT1 TCR-transduced T cells Phase 1 Phase 2

Detailed Description:

This trial concerns a novel approach to generating leukaemia antigen-specific T cells for adoptive cellular therapy in HLA-A*0201 patients with acute myeloid leukaemia (AML) and chronic myeloid leukaemia (CML)

In this study, patient T cells will be gene-modified using a GMP grade retroviral vector containing the genes for a WT1-specific, HLA-A2-restricted T cell receptor. This ex vivo gene therapy will generate T cells expressing the WT1-specific TCR and thus able to recognise WT1-expressing target cells.

The autologous Cys1 WT1 TCR-transduced T cells will be re-infused back into adult leukaemia patients following lymphodepleting conditioning.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 7 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: WT1 TCR Gene Therapy for Leukaemia: A Phase I/II Safety and Toxicity Study
Study Start Date : April 2012
Actual Primary Completion Date : May 2018
Actual Study Completion Date : May 2018

Arm Intervention/treatment
Experimental: Single arm cohort study
WT1 TCR-transduced T cells
Genetic: WT1 TCR-transduced T cells

Two patient cohorts:

Cohort 1 (up to 6 patients) = ≤ 2 x 107/kg WT1 TCR-transduced T cells

Cohort 2 (12 patients)= ≤ 108/kg WT1 TCR-transduced T cells

Primary Outcome Measures :
  1. Identify organ toxicities and other side effects [ Time Frame: Up to 12 months per patient ]
  2. Transduction efficiency and TCR expression on TCR-transduced cells [ Time Frame: Up to 12 months per patient ]

Secondary Outcome Measures :
  1. WT1-specific immune responses of TCR-transduced T cells [ Time Frame: Up to 12 months per patient ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

General Inclusion Criteria:

  • Age ≥ 18 years and ≤ 75 years.
  • Life expectancy ≥ 16 weeks (4 months).
  • World Health Organisation (WHO) performance status of 0-2
  • HLA A*0201 positive
  • Completed previous course of chemotherapy ≥ 4 weeks prior to commencing the initial phase of the trial (leucapheresis for collection of patient PBMC).
  • Peripheral blood total lymphocyte count > 0.5x109/L.
  • Informed consent in writing and ability to co-operate with treatment and follow up.
  • Willing, able and available for collection of PBMC/ T cells by leucapheresis.
  • Hepatitis B and C, HTLV-1, Syphilis, HIV negative.
  • Free from serious concurrent illness.
  • Female patients of child-bearing age must have a negative pregnancy test and agree to use reliable contraceptive methods for the duration of the therapy and for 6 months afterwards.
  • Male patients must agree to use appropriate medically approved contraception during the trial and for six months afterwards.
  • Haematological and Biochemical Indices:
  • Haemoglobin (Hb) ≥ 7.0 g/dl; neutrophils ≥ 0.2 x 109/L; total lymphocytes > 0.5 x 109/L; platelets (Plts) ≥ 40 x 109/L
  • serum bilirubin, Alanine amino-transferase (ALT) and/or aspartate amino transferase (AST) < 3 x upper normal limit
  • calculated creatinine clearance ≥ 30 ml/min (uncorrected value) or isotope clearance measurement ≥ 30ml/min

Further disease specific inclusion criteria are detailed in Protocol

Exclusion Criteria:

  • Age < 18 years or > 75 years.
  • Patients should not receive concurrent systemic corticosteroids whilst on the study.
  • Within three months of having received fludarabine (at time of leucapheresis).
  • Major thoracic and/or abdominal surgery in the preceding three to four weeks from which the patient has not yet recovered.
  • Patients who are high medical risks because of non-malignant systemic disease, as well as those with active uncontrolled infection.
  • Patients with any other condition, which in the Investigator's opinion would not make the patient a good candidate for the clinical trial.
  • Patients known to be serologically positive for Hepatitis B, C, HTLV-1 Syphilis or HIV.
  • Concurrent congestive heart failure or prior history of New York Heart Association (NYHA) class III/ IV cardiac disease
  • Positive pregnancy test or reluctance to use contraception.
  • Pregnant and lactating women are excluded.
  • History of Severe Allergy.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01621724

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United Kingdom
University Hospitals Bristol NHS Foundation Trust
Bristol, United Kingdom, BS38 3AP
University College London Hospitals NHS Trust
London, United Kingdom, NW1 2PG
Sponsors and Collaborators
Cell Medica Ltd
University College, London
Cell Therapy Catapult
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Principal Investigator: Emma Morris, Dr University College, London
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Responsible Party: Cell Medica Ltd
ClinicalTrials.gov Identifier: NCT01621724    
Other Study ID Numbers: D-00272-CT2014001
First Posted: June 18, 2012    Key Record Dates
Last Update Posted: October 2, 2018
Last Verified: October 2018

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Cell Medica Ltd:
Gene therapy
Additional relevant MeSH terms:
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Leukemia, Myeloid
Leukemia, Myelogenous, Chronic, BCR-ABL Positive
Neoplasms by Histologic Type
Myeloproliferative Disorders
Bone Marrow Diseases
Hematologic Diseases