NCT05656248 · REGISTRY CONDITION SEARCH

Study of CPX-351 (VYXEOS) in Individuals < 22 Years With Secondary Myeloid Neoplasms

Found through the registry condition index, not selected as a treatment recommendation. This discovery collection was restricted to studies with posted results.

Phase: PHASE2
Status at capture: ACTIVE NOT RECRUITING
Registry last update: 2026-10-15

The purpose of this study is to learn the effects of treatment with an investigational drug, CPX-351 in patients with secondary myeloid neoplasms (SMNs).

Open the original ClinicalTrials.gov record → · Download preserved record

What did the study report?

Outcomes, safety and baseline populations are separate source sections. Quality-of-life measures appear under their original outcome titles.

flow

Participant flow

→

baseline

Baseline characteristics

→

outcome · POSTED

Complete Remission (CR) and Complete Remission With Incomplete Peripheral Blood Recovery (CRi) Rate

→

outcome · POSTED

Tolerability Success Rate (TSR) for the First Course of Chemotherapy

→

outcome · POSTED

Tolerability Success Rate (TSR) for Patients Completing the Second Course of Chemotherapy

→

outcome · POSTED

Toxicity Profile of Patients With SMN Treated With One or Two Courses of CPX-351

→

outcome · NOT POSTED

Overall (OS) Survival of Patients Who Received One or Two Courses of CPX-351 Followed by HSCT

→

outcome · NOT POSTED

Event-free Survival (EFS) of Patients Who Received One or Two Courses of CPX-351 Followed by HSCT

→

outcome · NOT POSTED

The Impact of Transplant on Patients Who Received One or Two Courses of CPX-351 Followed by HSCT

→

adverse events

Adverse events

→

more info

Limitations, agreements, and source contact

→

Who could take part

eligibility Criteria: Inclusion Criteria: * Patients must be ≥1 year and \< 22 years of age at the time of enrollment. * Patient must have one of the following diagnoses: * Treatment-related MDS/AML: Patients with solid organ or hematopoietic neoplasms previously treated with alkylating agents, ionizing radiation, topoisomerase inhibitors, antimetabolites, thiopurines, mycophenolate mofetil, fludarabine, and anti-tubulin agents (vincristine, vinblastine, vindesine, paclitaxel, and docetaxel usually in combination), who develop MDS, or AML are candidates for the CPXSMN protocol. If the bone marrow has between 5% and 20% blasts (higher-risk MDS), patients are discussed with the hematopoietic stem cell transplantation (HSCT) team for consideration to receive chemotherapy before HSCT. If the consensus is that cytoreduction before HSCT is necessary, and the cumulative dose of doxorubicin equivalent is \< 500 mg/m2 (in cases of cardio protection) or ≤400 mg/m\^2 (cases without cardio protection), patients are eligible for the CPXSMN protocol OR * Secondary MDS/AML: Patients with primary MDS in transformation to AML (refractory cytopenia with an excess of blasts), acquired aplastic anemia evolving to AML, myeloid neoplasms arising from inherited bone marrow failure syndromes (including severe congenital neutropenia, Schwachman-Diamond syndrome, MECOM syndrome) or MDS/AML predisposition syndromes (including germline predisposition in GATA2, RUNX1, SAMD9/SAMD9L, ERCC6L2, NF1, ETV6, ANKRD26, ERCC6L2, TP53 or CEBPA genes) are eligible for the CPXSMN trial. If the bone marrow has between 5% and 20% blasts (higher-risk MDS), patients are discussed with the HSCT team for consideration to receive chemotherapy before HSCT. If the consensus is that cytoreduction before HSCT is necessary, the patients are eligible for the CPXSMN protocol. * Patients must have a performance status corresponding to an Eastern Cooperative Oncology Group (ECOG) score of 0, 1 or 2. Use Karnowski for patients \> 16 years of age and Lansky for patients ≤16 years of age. * Note: Patients who are unable to walk because of paralysis, but who are up in a wheelchair, will be considered ambulatory for the purpose of assessing the performance score. * Concomitant medications restrictions * See Section 4.2.5 or Appendix II (of protocol) for concomitant therapy restrictions for patients during treatment. * Adequate renal function defined as: * Creatinine clearance or radioisotope GFR \> 70 mL/min/1.73 m\^2, or * A serum creatinine based on age/gender as follows: Age: 1 to \< 2 years; Maximum Serum Creatinine: Male 0.6, Female 0.6; Age: 2 to \< 6 years, Maximum Serum Creatinine: Male 0.8, Female 0.8; Age: 6 to \< 10 years; Maximum Serum Creatinine: Male 1, Female 1; Age: 10 to \< 13 years; Maximum Serum Creatinine: Male 1.2, Female 1.2; Age: 13 to \< 16 years; Maximum Serum Creatinine: Male 1.5, Female 1.5; Age: ≥ 16 years; Maximum Serum Creatinine: Male 1.7, Female 1.4 * Adequate liver function defined as (unless it is related to leukemic involvement): * Direct bilirubin ≤1.5 x upper limit of normal (ULN) for age and institution. At institutions that do not obtain a direct bilirubin in patients with a normal total bilirubin, a normal total bilirubin may be used as evidence that the direct bilirubin is not \> 1.5 x the ULN. * SGPT (ALT) ≤ 3.0 x ULN for age and institution * Adequate cardiac function defined as: * Shortening fraction of ≥27% by echocardiogram, or * Ejection fraction of ≥ 50% by radionuclide angiogram or echocardiogram, and * Corrected QT (QTcB) interval \< 500 msecs * Central nervous system function defined as: * Patients with seizure disorder may be enrolled if on anticonvulsants and if seizures are well controlled * CNS toxicity ≤ Grade 2 * Prior therapy * Patients must have recovered from the acute toxic effects of all prior chemotherapy, immunotherapy, HSCT or radiotherapy prior to entering this study. All prior treatment-related toxicities must have resolved to ≤ Grade 2 prior to enrollment. 1. Myelosuppressive chemotherapy: Must not have received myelosuppressive chemotherapy within 3 weeks of entry onto this study (excluding hydroxyurea). Cyto-reduction with hydroxyurea can be initiated and continued for up to 24 hours prior to the start of CPX-351. 2. Biologic (anti-neoplastic agent): At least 7 days since the completion of therapy with steroids, retinoids or hypomethylating agents. Note: For agents that have known adverse events occurring beyond 7 days after administration (i.e. monoclonal antibodies), this period must be extended beyond the time during which acute adverse events are known to occur. 3. Radiation therapy (RT): ≥ 2 weeks for local palliative RT (small port); ≥ 6 months must have elapsed if prior craniospinal RT or if ≥ 50% radiation of pelvis; ≥ 6 weeks must have elapsed if other substantial BM radiation. Note: Patients must have received ≤ than 13.6 Gy prior radiation to the mediastinum. Patients with prior cumulative doxorubicin equivalent \> 400 mg/m2 and prior radiation (any dose) to the mediastinum are not eligible for the protocol. 4. Hematopoietic stem cell transplantation: No evidence of active graft vs. host disease for at least 4 weeks. For allogeneic HSCT patients, ≥ 3 months must have elapsed since HSCT. * Must have received no more than 1 prior autologous or allogeneic stem cell transplant. * Patients must be off all systemic immunosuppressive therapy for at least 2 weeks, excluding hydrocortisone for physiologic cortisol replacement. 5. Intrathecal cytotoxic therapy: * No waiting period is required for patients having received intrathecal cytarabine, methotrexate, and/or hydrocortisone. * At least 14 days must have elapsed since receiving liposomal cytarabine (DepoCyte) by intrathecal injection. 6. Growth factors: * Patients must not have received hematopoietic growth factors for 7 days prior to CPX-351. * Patients must not have received pegfilgrastim for 14 days prior to CPX-351. * HIV disease * Patients with a known history of HIV are eligible, if they meet all of the following conditions: * No history of HIV complications with the exception of CD4 count \< 200 cells/mm\^3 * No antiretroviral therapy with overlapping toxicity such as myelosuppression * CD4 count \> 500 cells/mm\^3 prior to the diagnosis of relapsed AML * HIV viral loads below the limit of detection * No history of highly active antiretroviral therapy (HAART)-resistant HIV * Residual or relapsed solid malignancy Patients with residual or relapsed solid malignancy (for example osteosarcoma) at the time of the diagnosis of SMN are not excluded from this trial and the treatment individualized to integrate the management of the two malignancies. * All patients and/or their parents or legal guardians must sign a written informed consent. Exclusion Criteria: * Patients with de novo AML (i.e., patients eligible for St. Jude or COG frontline AML trials). * Patients with any of the following: * Constitutional trisomy 21 or with constitutional mosaicism of chromosome trisomy 21 * Patients with Fanconi anemia (DNA repair syndrome) or dyskeratosis congenita (telomeropathy) * Wilson disease or other copper-related metabolic disorders * Mixed phenotype acute leukemia * Philadelphia chromosome-positive myeloid neoplasms (AML or CML) * Acute promyelocytic leukemia (APL), or * Juvenile myelomonocytic leukemia (JMML) and related RASopathy disorders in chronic phase. * Patients who have received greater amount of doxorubicin equivalents to \<500 mg/m2 (in cases of cardio protection with dexrazoxane) or \<400mg/m2 (cases without cardio protection). For the purposes of determining eligibility for this protocol, the following cardiotoxicity multipliers will be used to determine doxorubicin equivalents: * Doxorubicin (reference): 1 * Daunomycin: 0.5 * Epirubicin: 0.5 * Idarubicin: 5 * Mitoxantrone: 10 * Patients who are currently receiving another investigational drug. * Patients receiving medications for treatment of left ventricular systolic dysfunction. * Patients with documented active, uncontrolled infection at the time of study entry. * Patients with known active HBV and HCV infections. * Patients with prior allergy to daunorubicin and/or cytarabine. * Pregnancy and breast feeding * Female patients who are pregnant are ineligible due to risks of fetal and teratogenic adverse events as seen in animal/human studies. * Lactating females who are breastfeeding an infant/child * Female patients of childbearing potential are not eligible unless a negative pregnancy test result has been obtained. * Sexually active patients of reproductive potential are not eligible unless they have agreed to use an effective contraceptive method for the duration of their study participation and for at least 6 months after the last dose of protocol therapy.
healthy Volunteers: false
maximum Age: 21 Years
minimum Age: 1 Year
sex: ALL
std Ages: CHILD
ADULT

Treatment arms and interventions

arm Groups

description
Participants will receive CPX-351 for remission induction, and then will proceed to allogeneic HSCT or other therapies as per institutional practice. Intrathecal (IT) chemotherapy will be given on Day 1 of each cycle, for all participants, but may be delayed if clinically indicated. IT cytarabine, IT methotrexate, and IT methotrexate/hydrocortisone/cytarabine (MHA) according to age are all acceptable.
intervention Names
Drug: CPX-351
Drug: MHA
Procedure: Allogeneic Hematopoietic Stem Cell Transplantation
label
CPX-351
type
EXPERIMENTAL

interventions

arm Group Labels
CPX-351
description
Given Intraveneously (IV)
name
CPX-351
other Names
Vyxeos®
cytarabine/daunorubicin liposomal
type
DRUG
arm Group Labels
CPX-351
description
Given Intrathecal (IT)
name
MHA
other Names
methotrexate/hydrocortisone/cytarabine
type
DRUG
arm Group Labels
CPX-351
description
Undergo HSCT
name
Allogeneic Hematopoietic Stem Cell Transplantation
other Names
HSCT
Stem Cell Transplantation
type
PROCEDURE

Study design

allocation

intervention Model

SINGLE_GROUP

masking Info

masking: NONE

primary Purpose

TREATMENT

Enrollment

count: 25
type: ACTUAL

Registered outcome plans (not posted results)

primary Outcomes

description
Proportion of participants achieving CR and proportion of participants achieving CRi by the end of one or two courses of CPX-351 Complete morphologic remission response (CR) is defined as less than 5% blasts without Auer rods by morphological evaluation of the bone marrow (M1 marrow). Patients in morphologic CR without hematological recovery (white cell blood count ≥ 1.0 x 10\^9/L, unsupported platelet count ≥ 30.0 x 10\^9/L and absolute neutrophil count ≥ 0.3 x 10\^9/L) are classified as morphological CR and incomplete recovery (CRi) of absolute neutrophil, white blood cell, and/or platelet counts.
measure
Complete Remission (CR) and Complete Remission With Incomplete Peripheral Blood Recovery (CRi) Rate
time Frame
Day 22 of Cycle 1 and day 22-28 of Cycle 2
description
We define a tolerability success as a patient completing the first course of therapy without experiencing a grade 4 or 5 non-hematologic toxicity.
measure
Tolerability Success Rate (TSR) for the First Course of Chemotherapy
time Frame
Adverse events will be monitored from the time of first study intervention or treatment until the completion of the first course of therapy
description
We define a tolerability success as a patient completing the second course of therapy without experiencing a grade 4 or 5 non-hematologic toxicity
measure
Tolerability Success Rate (TSR) for Patients Completing the Second Course of Chemotherapy
time Frame
Adverse events will be monitored from the time of second course of therapy until the completion of the second course of therapy.

secondary Outcomes

description
We will define categories for toxicity events and for each category we will determine the highest grade experienced by each patient. We will then report the number of patients with each grade in each category.
measure
Toxicity Profile of Patients With SMN Treated With One or Two Courses of CPX-351
time Frame
Adverse events will be monitored from the time of first study intervention or treatment until 30 days after off-therapy.
description
We will use the Kaplan-Meier method to estimate overall survival. We define OS as the time elapsed from protocol enrollment to death and censor times of living patients at last follow-up.
measure
Overall (OS) Survival of Patients Who Received One or Two Courses of CPX-351 Followed by HSCT
time Frame
3 years from study entry
description
We will use the Kaplan-Meier method to estimate event-free survival. We define EFS as the time elapsed from protocol enrollment to death, relapse, discontinuation of therapy due to excessive toxicity or resistant disease, or development of an additional malignancy and censor times for patients free of these events at last follow-up.
measure
Event-free Survival (EFS) of Patients Who Received One or Two Courses of CPX-351 Followed by HSCT
time Frame
3 years from study entry
description
To explore the impact of transplant, we will fit Cox models with transplant as a time-dependent covariate.
measure
The Impact of Transplant on Patients Who Received One or Two Courses of CPX-351 Followed by HSCT
time Frame
3 years from study entry

Full study description

brief Summary: The purpose of this study is to learn the effects of treatment with an investigational drug, CPX-351 in patients with secondary myeloid neoplasms (SMNs).
detailed Description: Primary Objective * Determine the composite complete remission (CR) and complete remission with incomplete peripheral blood recovery (CRi) rates, safety and tolerability in patients under 22 years of age with SMN treated with one or two courses of CPX-351 before HSCT. Secondary Objectives * Describe the toxicity profile of patients with SMN treated with one or two courses of CPX-351. * Estimate the 3-year overall survival of patients who received one or two courses of CPX-351 followed by HSCT. Participants who meet the inclusion criteria and consent will receive up to 2 cycles of CPX-351 for remission induction, and then will proceed to allogeneic HSCT or other therapies as per institutional practice. If a patient attains remission and has negative MRD after the first course of CPX-351, and HSCT can occur within 3 to 4 weeks from the evaluation date of the first course, the patient can proceed to HSCT without receiving the second course of CPX-351.

Source references