Skip to content

Tagraxofusp in Treating Patients With Blastic Plasmacytoid Dendritic Cell Neoplasm After Stem Cell Transplant

Tagraxofusp (SL-401) Therapy for Blastic Plasmacytoid Dendritic Cell Neoplasm (BPDCN) Patients Post-Autologous or Post-Allogeneic Hematopoietic Cell Transplantation

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04317781
Enrollment
3
Registered
2020-03-23
Start date
2020-03-27
Completion date
2023-07-11
Last updated
2024-07-31

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Blastic Plasmacytoid Dendritic Cell Neoplasm

Brief summary

This phase II trial studies the side effects of tagraxofusp in treating patients with blastic plasmacytoid dendritic cell neoplasm after stem cell transplant. Tagraxofusp is a type of immunotoxin that is made by linking a protein called IL-3 to a toxic substance. Tagraxofusp may help find cancer cells that express IL-3 and kill them without harming normal cells.

Detailed description

PRIMARY OBJECTIVE: I. To evaluate the safety of tagraxofusp-erzs (tagraxofusp) in patients with blastic plasmacytoid dendritic cell neoplasm (BPDCN) after autologous (auto) or allogeneic (allo) hematopoietic cell transplantation (HCT). SECONDARY OBJECTIVES: I. To estimate progression-free survival (PFS) in patients with BPDCN receiving maintenance therapy with tagraxofusp after auto-HCT or allo-HCT. II. To estimate the overall survival (OS) in patients with BPDCN receiving maintenance therapy with tagraxofusp after auto-HCT or allo-HCT. OUTLINE: Within day 45 and 180 after stem cell transplant, patients receive tagraxofusp-erzs intravenously (IV) over 15 minutes on days 1-3 of cycles 1-4 and days 1-2 of subsequent cycles. Treatment repeats every 28 days for up to 24 cycles in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up for up to 1 year.

Interventions

Given IV

Sponsors

National Cancer Institute (NCI)
CollaboratorNIH
M.D. Anderson Cancer Center
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
2 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Eligible patients will be aged \>= 18 years. Pediatric patients age 2 years and older will be considered on a case by case basis. * Diagnosis of blastic plasmacytoid dendritic cell neoplasm (BPDCN) according to World Health Organization (WHO) classification or confirmed by hematopathology * The patients must be in partial response or better * \> 30 days post-transplant without active or chronic infections * Karnofsky performance status \>= 60%; Lansky \>= 60 * Left ventricular ejection fraction (LVEF) \>= institutional lower limit of normal by multigated acquisition (MUGA) scan or echocardiogram within 30 days of first protocol treatment * Diffusion capacity of the lung for carbon monoxide (DLCO) \> 40% of predicted value (corrected for hemoglobin) within 3 months of registration * Forced expiratory volume in 1 second (FEV1) \> 40% of predicted value within 3 months of registration * Forced vital capacity (FVC) \> 40% of predicted value within 3 months of registration * Serum creatinine =\< 1.5 mg/dL (133 mmol/L) * Serum albumin \>= 3.2 g/dL (or \>= 32 g/L) without IV albumin within the previous 72 hours * Bilirubin =\< 1.5 x the upper limit of normal (\[ULN\] except patients with Gilbert syndrome in whom bilirubin level of \> 1.5 x ULN will be allowed) * Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) =\< 2.5 times ULN * Hemoglobin \>= 8 g/dL with or without transfusion in the last 7 days * Absolute neutrophil count (ANC) \>= 1000 without granulocyte colony stimulating factor (GCSF) or granulocyte-macrophage colony-stimulating factor (GMCSF) in the last 2 weeks prior to screening * Platelets \>= 50,000micro/mL * For allo-HCT, no \>= grade 2 visceral (gut or liver) acute graft versus host disease (GVHD) and no \>= grade 3 or any other acute GVHD (patients with chronic GVHD will be allowed at the discretion of the investigator) * Patient agrees to use acceptable contraceptive methods for the duration of time in the study, and to continue to use acceptable contraceptive methods for 2 months after the last tagraxofusp infusion * Woman of child bearing potential (WOCBP) with a negative serum or urine pregnancy test within 14 days of tagraxofusp treatment * Patient or patient's legal representative, parent(s) or guardian able to sign informed consent * The patient can adhere to the study visit schedule and other protocol requirements, including follow-up for survival assessment

Exclusion criteria

* The patient has persistent clinically significant non-hematologic toxicities \>= grade 2 (excluding alopecia, nausea, and fatigue) * Evidence of central nervous system (CNS) involvement * Uncontrolled and active pulmonary disease * Requirement for oxygen treatment * Receiving chemotherapy, radiotherapy or other anti-cancer therapy within 14 days of first dose of study drug. There must be at least a 6-week interval from the last immunotherapy therapy * Uncontrolled infection * Human immunodeficiency virus (HIV)/hepatitis B and/or C * Any history of invasive malignancy in the last 2 years excluding any malignancy such as cervical cancer or skin cancer (excluding melanoma) that is considered cured at the time of screening * Pregnant or breast-feeding woman * Patient has uncontrolled intercurrent illness or medical/psychiatric condition that would limit compliance with study requirements or that would in the investigator's opinion place the patient at an unacceptably high risk for toxicities * Clinical significant cardiopulmonary disease including uncontrolled or New York Heart Association (NYHA) class 3 or 4 congestive heart failure, uncontrolled angina, uncontrolled hypertension, uncontrolled arrhythmia, myocardial infarction or stroke within 6 months of first protocol treatment or corrected QT (QTc) \> 480 ms

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants That Received Planned Tagraxofusp Post TransplantUp to 1 yearParticipants completed at least 75% of planned tagraxofusp doses in at least 4 cycles of therapy.

Secondary

MeasureTime frameDescription
Progression Free Survival (PFS)From treatment start date to date of disease progression or death, assessed up to 1 yearParticipant alive and disease free one year post transplant
Overall Survival (OS)From treatment start date to death, assessed up to 1 yearNumber of participants alive one year post transplant

Countries

United States

Participant flow

Recruitment details

All participants were registered at MD Anderson Cancer Center

Participants by arm

ArmCount
Treatment (Tagraxofusp-erzs)
Within day 45 and 180 after stem cell transplant, patients receive tagraxofusp-erzs IV over 15 minutes on days 1-3 of cycles 1-4 and days 1-2 of subsequent cycles. Treatment repeats every 28 days for up to 24 cycles in the absence of disease progression or unacceptable toxicity. Tagraxofusp-erzs: Given IV
3
Total3

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyAdverse Event1
Overall StudyDisease relapse1
Overall StudyWithdrawal by Subject1

Baseline characteristics

CharacteristicTreatment (Tagraxofusp-erzs)
Age, Categorical
<=18 years
0 Participants
Age, Categorical
>=65 years
1 Participants
Age, Categorical
Between 18 and 65 years
2 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
0 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
3 Participants
Region of Enrollment
United States
3 participants
Sex: Female, Male
Female
1 Participants
Sex: Female, Male
Male
2 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
1 / 3
other
Total, other adverse events
1 / 3
serious
Total, serious adverse events
0 / 3

Outcome results

Primary

Number of Participants That Received Planned Tagraxofusp Post Transplant

Participants completed at least 75% of planned tagraxofusp doses in at least 4 cycles of therapy.

Time frame: Up to 1 year

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Treatment (Tagraxofusp-erzs)Number of Participants That Received Planned Tagraxofusp Post Transplant1 Participants
Secondary

Overall Survival (OS)

Number of participants alive one year post transplant

Time frame: From treatment start date to death, assessed up to 1 year

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Treatment (Tagraxofusp-erzs)Overall Survival (OS)2 Participants
Secondary

Progression Free Survival (PFS)

Participant alive and disease free one year post transplant

Time frame: From treatment start date to date of disease progression or death, assessed up to 1 year

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Treatment (Tagraxofusp-erzs)Progression Free Survival (PFS)2 Participants

Source: ClinicalTrials.gov · Data processed: Feb 17, 2026