Pivotal study of Iodine I 131 Tositumomab for chemotherapy-refractory low-grade or transformed low-grade B-cell non-Hodgkin’s lymphoma
Trial overview
Number of participants (par.) receiving TST and I 131 TST with a response >=30 days versus par. with a response >=30 days after their last qualifying chemotherapy regimen (LQCR), Masked Independent Randomized Radiology and Oncology Review (MIRROR) Panel
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Duration of response for par. receiving TST and I 131 TST with a response >=30 days versus the number of par. with a response >=30 days after their LQCR, as assessed by the MIRROR panel
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with any uncofirmed response (CR, Clinical Complete Response [CCR], or PR), CR, CCR, CR+CCR, and PR), as assessed by the Investigator
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with any confirmed response (CR, CCR, or PR), Confirmed CR, Confirmed CCR, Confirmed CR+CCR, and Confirmed PR, as assessed by Investigator
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Time to progression of disease or death, as assessed by the Investigator
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Time to treatment failure, as assessed by the Investigator
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Overall Survival
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with responses of CR, CCR, CR+CCR, and PR following TST and I 131 TST and following the LQCR, as assessed by the Investigator
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with the indicated adverse events (AE) related to study drug experienced by at least 5% of participants
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with the indicated Grade 3 or Grade 4 AEs experienced by at least 5% of participants
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with the indicated Grade 3 or Grade 4 AEs related to study drug and experienced by at least 5% of participants
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with the indicated primary cause of death
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with the indicated time to death from the last dose of study drug
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with the indicated fatal serious adverse events (SAE) unrelated to study drug
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with the indicated fatal SAEs related to study drug
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with the indicated SAEs related to study drug
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with the indicated type of infection
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with an infection for which anti-infectives were administered
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants who were negative for human anti-murine antibodies (HAMA) at baseline (before receiving the dosimetric dose) but positive or negative after receiving the dosimetric dose
Timeframe: HAMA was measured at baseline; Day5; Weeks 7, 17, 25; and then every 12 months while in study BEX104526. Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Time to HAMA positivity from the first dosimetric dose
Timeframe: HAMA was measured at baseline; Day5; Weeks 7, 17, 25; and then every 12 months while in study BEX104526. Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with the indicated Grade 3 or Grade 4 hematologic toxicities
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Number of participants with hypothyroidism prior to therapy and after the therapeutic dose
Timeframe: Participants were evaluated for up to 99.1 months in Study 104504 or were followed in the long-term follow-up study for up to 141.5 months
Participation criteria
- Male and female subjects ≥18 years of age with histologically confirmed at initial diagnosis, previously treated (at least 2 prior chemotherapy regimens), low-grade NHL or low-grade lymphoma that had transformed to intermediate- or high-grade histology.
- Subjects with more than an average of 25% of the intratrabecular marrow space involved by lymphoma in bone marrow biopsy specimens as assessed microscopically within 42 days of study entry. Bilateral posterior iliac crest core biopsies are required if the percentage of intratrebecular space involved exceeds 10% in a unilateral biopsy. The mean of bilateral biopsies must be no more than 25%.
- Cytotoxic chemotherapy, radiation therapy, immunosuppressants, or cytokine treatment within 4 weeks prior to study entry or persistent clinical evidence of toxicity.
- Male and female subjects ≥18 years of age with histologically confirmed at initial diagnosis, previously treated (at least 2 prior chemotherapy regimens), low-grade NHL or low-grade lymphoma that had transformed to intermediate- or high-grade histology.
- Subjects with more than an average of 25% of the intratrabecular marrow space involved by lymphoma in bone marrow biopsy specimens as assessed microscopically within 42 days of study entry. Bilateral posterior iliac crest core biopsies are required if the percentage of intratrebecular space involved exceeds 10% in a unilateral biopsy. The mean of bilateral biopsies must be no more than 25%.
- Cytotoxic chemotherapy, radiation therapy, immunosuppressants, or cytokine treatment within 4 weeks prior to study entry or persistent clinical evidence of toxicity.
- Prior stem cell transplant.
- Active obstructive hydronephrosis.
- Evidence of active infection requiring intravenous (IV) antibiotics at the time of study entry.
- New York Heart Association Class III or IV heart disease or other serious illness that would preclude evaluation.
- Prior malignancy other than lymphoma, except for adequately treated skin cancer, in situ cervical cancer, or other cancer for which the subject has been disease-free for 5 years.
- Known HIV infection.
- Known brain or leptomeningeal metastases.
- Subjects who are pregnant or nursing.
- Previous allergic reactions to iodine. This does not include reactions to intravenous iodine-containing contrast materials.
- Prior exposure to monoclonal or polyclonal antibodies of any non-human species for either diagnostic or therapeutic purposes, including engineered chimeric and humanized antibodies.
- Prior radioimmunotherapy.
- Progressive disease within 1 year of irradiation arising in a field that has been previously irradiated with >3500 cGy.
- Current use of either approved or non-approved (through another protocol) anti-cancer drugs or biologics
- De novo intermediate- or high-grade lymphoma.
Trial location(s)
This study does not involve prospective enrollment of participants.
Study documents
If you wish to request for full study report, please contact - [email protected]
Results overview
Results posted on ClinicalTrials.gov
Plain language summaries
Plain language summaries of clinical trial results for Phase 2-4 clinical trials that were initiated on or after January 2022 will be posted by GSK within one year following study completion.