Phase I Study of Recombinant Human IL-15 (rhIL-15) and Mogamulizumab for People With Refractory or Relapsed Adult T-Cell Leukemia and Mycosis Fungoides/Sezary Syndrome

2019-12-10 01:21:18 | BioPortfolio



Adult T-cell leukemia/lymphoma (ATLL) and mycosis fungoides/Sezary syndrome (MF/SS) are cancers that form in the T cells, a type of white blood cell that helps with the body s immune response. A combination of drugs might be able to better treat these cancers than existing therapies.


To test if the drugs IL-15 and mogamulizumab are safe and effective to treat people with ATLL or MF/SS.


People ages 18 and older with relapsed ATLL or MF/SS that has not responded to at least one standard treatment


Participants will be screened with:

Medical history

Physical exam

Blood (including HIV, hepatitis B and C), urine, lung, and heart tests

Bone marrow tests (if needed): A needle inserted in the participant s hip will take a small amount of marrow.

CT, PET and/or MRI scans

Tumor biopsy (if needed): A needle will take out a small piece of the participant s tumor.

Participants will get the study drugs by vein for up to six 28-day cycles. They will get IL-15 the first 5 days of each cycle. They will get mogamulizumab on days 1, 8, 15, and 22 of cycle 1 and days 1 and 15 of the other cycles. They will be hospitalized for 1 week in cycle 1. They may need to get a midline catheter. This is a soft tube put into a vein leading to the heart.

Participants will have repeats of the screening tests throughout the study.

After treatment, participants will have visits every 60 days for 6 months, every 90 days for 2 years, and then every 6 months for 2 years.



- Advanced mycosis fungoides, its leukemic form Sezary syndrome (MF/SS), and adult T- cell leukemia/lymphoma (ATLL) are all aggressive mature T-cell malignancies which are considered incurable without an allogeneic stem cell transplant.

- Mogamulizumab is a defucosylated monoclonal antibody directed towards CCR4, a chemokine receptor expressed by the majority of MS/SS and ATLL cells. It is approved by the United States Food and Drug Administration for treatment of relapsed MF/SS, and is recommended by the National Comprehensive Cancer Network for treatment of ATLL.

- Defucosylation of mogamulizumab is thought to enhance its capacity for antibody- dependent cell cytotoxicity (ADCC), which is mediated by natural killer (NK) cells and macrophages.

- The immunologic effects of recombinant human Interleukin-15 (rhIL-15), a stimulatory cytokine that promotes the differentiation and activation of NK cells, monocytes and long- term CD8+ memory T-cells, has been assessed in several phase I trials in cancer patients.

- Concomitant administration of rhIL-15 with mogamulizumab may further enhance the ADCC capacity of the antibody and result in improved efficacy for patients with CCR4- expressing cancers.


-To determine the safety and toxicity profile and the maximum tolerated dose (MTD) of continuous intravenous infusion (civ) rhIL-15 administration in combination with standard intravenous (IV) mogamulizumab treatment


- Age greater than or equal to 18 years of age

- ECOG performance status of less than or equal to 1

- Histologically or cytologically confirmed mycosis fungoides/S(SqrRoot)(Copyright)zary syndrome or adult T- cell leukemia/lymphoma relapsed after or refractory to at least one line of systemic treatment.

- Adequate organ and marrow function


- Open-label, single-center, non-randomized phase I study

- Standard "3 + 3" design will be used to determine the MTD of dose-escalated rhIL-15 with fixed dose of mogamulizumab, with an expansion cohort at the MTD

- Maximum 6 cycles (28-day cycles) of combination therapy

- To explore all dose levels, including further evaluation in a dose expansion cohort, and to account for unevaluable patients the accrual ceiling will be set at 20 patients.

Study Design


Adult T-Cell Lymphoma/Leukemia


rhIL-15, Mogamulizumab


National Institutes of Health Clinical Center
United States


Not yet recruiting


National Institutes of Health Clinical Center (CC)

Results (where available)

View Results


Published on BioPortfolio: 2019-12-10T01:21:18-0500

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Medical and Biotech [MESH] Definitions

A genus in the family RETROVIRIDAE consisting of exogenous horizontally-transmitted viruses found in a few groups of mammals. Infections caused by these viruses include human B- or adult T-cell leukemia/lymphoma (LEUKEMIA-LYMPHOMA, T-CELL, ACUTE, HTLV-I-ASSOCIATED), and bovine leukemia (ENZOOTIC BOVINE LEUKOSIS). The type species is LEUKEMIA VIRUS, BOVINE.

A strain of PRIMATE T-LYMPHOTROPIC VIRUS 1 isolated from mature T4 cells in patients with T-lymphoproliferation malignancies. It causes adult T-cell leukemia (LEUKEMIA-LYMPHOMA, T-CELL, ACUTE, HTLV-I-ASSOCIATED), T-cell lymphoma (LYMPHOMA, T-CELL), and is involved in mycosis fungoides, SEZARY SYNDROME and tropical spastic paraparesis (PARAPARESIS, TROPICAL SPASTIC).

Aggressive T-Cell malignancy with adult onset, caused by HUMAN T-LYMPHOTROPIC VIRUS 1. It is endemic in Japan, the Caribbean basin, Southeastern United States, Hawaii, and parts of Central and South America and sub-Saharan Africa.

A leukemia/lymphoma found predominately in children and young adults and characterized LYMPHADENOPATHY and THYMUS GLAND involvement. It most frequently presents as a lymphoma, but a leukemic progression in the bone marrow is common.

A leukemia/lymphoma found predominately in children and adolescents and characterized by a high number of lymphoblasts and solid tumor lesions. Frequent sites involve LYMPH NODES, skin, and bones. It most commonly presents as leukemia.

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