Testing the Addition of an Anti-cancer Drug, DT2216, to the Usual Chemotherapy Treatment for Relapsed or Refractory Solid Tumors and Fibrolamellar Carcinoma

NCT ID: NCT06620302

Last Updated: 2025-10-24

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE1/PHASE2

Total Enrollment

81 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-06-12

Study Completion Date

2031-12-30

Brief Summary

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This phase I/II trial tests the safety, side effects and best dose of DT2216 in combination with irinotecan and how well it works in treating children, adolescents and young adults with solid tumors and fibrolamellar cancer that has come back after a period of improvement (relapsed) or that has not responded to previous treatment (refractory). DT2216 is an anti-apoptotic protein B-cell lymphoma-extra large targeted protein degrader. It may stop the growth of tumor cells by blocking Bcl-xL, a protein needed for tumor cell survival. Irinotecan is in a class of antineoplastic medications called topoisomerase I inhibitors. It blocks a certain enzyme needed for cell division and deoxyribonucleic acid repair and may kill tumor cells. Giving DT2216 in combination with irinotecan may be safe, tolerable, and/or effective in treating children, adolescents and young adults with relapsed or refractory solid tumors or fibrolamellar cancer.

Detailed Description

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PRIMARY OBJECTIVES:

I. To estimate the maximum tolerated dose (MTD) and/or recommended phase 2 dose (RP2D) of Bcl-xL proteolysis targeting chimera DT2216 (DT2216) in combination with intravenous irinotecan in patients with recurrent/refractory solid tumors.

II. To define and describe the toxicities of DT2216 in combination with irinotecan administered on this schedule in patients with recurrent/refractory solid tumors and patients with fibrolamellar carcinoma (FLC).

III. To characterize the pharmacokinetics of DT2216 in combination with irinotecan in patients with recurrent/refractory solid tumors and patients with fibrolamellar carcinoma (FLC).

IV. To preliminarily define antitumor activity of DT2216 in combination with irinotecan in patients with recurrent/refractory solid tumors (within the confines of a phase 1 study) and in patients with recurrent/refractory FLC.

SECONDARY OBJECTIVE:

I. To assess the pharmacodynamic activity of DT2216 in combination with irinotecan when administered intravenously in combination to children, adolescents, and young adults with recurrent/refractory cancer (solid tumors and FLC) by measuring peripheral mononuclear cell Bcl-xL levels and, where available, paired pre-treatment and on-(or recently off) treatment tumor samples using immunohistochemistry for TUNEL, Bcl-xL, Bcl2, Mcl1, and Ki67.

EXPLORATORY OBJECTIVES:

I. To explore the correlation of peripheral blood levels of the DNAJB1-PRKACA chimera, vitamin B12 levels and/or a panel of specific genomic markers, as well as intratumoral patterns of infiltrating immune cells as assessed by multiplex immunohistochemistry with disease characteristics of radiographic response in FLC patients.

II. To assess the ability of cross-sectional imaging to identify tumor involved pathological involved (positive) lymph nodes in FLC patients who undergo surgical resection including lymph node sampling or dissection.

OUTLINE: This is a phase I, dose-escalation study of DT2216 in combination with irinotecan, followed by a phase II study.

Patients receive DT2216 intravenously (IV) over 30 minutes on days 1, 4, 8, 11, 15, and 18 of each cycle and irinotecan IV over 90 minutes on days 2-6 of cycle 1, and on days 1-5 of remaining cycles. Cycles repeat every 21 days for up to 35 cycles (24 months) in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo blood sample collection throughout the trial.

After completion of study treatment, patients are followed up every at 3, 6, 9, 12, 18, 24, 36, 48 and 60 months.

Conditions

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Childhood Fibrolamellar Carcinoma Recurrent Childhood Fibrolamellar Carcinoma Recurrent Childhood Malignant Solid Neoplasm Recurrent Fibrolamellar Carcinoma Recurrent Malignant Solid Neoplasm Refractory Childhood Fibrolamellar Carcinoma Refractory Childhood Malignant Solid Neoplasm Refractory Fibrolamellar Carcinoma Refractory Malignant Solid Neoplasm

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Treatment (DT2216, irinotecan)

Patients receive DT2216 IV over 30 minutes on days 1, 4, 8, 11, 15, and 18 of each cycle and irinotecan IV over 90 minutes on days 2-6 of cycle 1, and on days 1-5 of remaining cycles. Cycles repeat every 21 days for up to 35 cycles (24 months) in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo blood sample collection throughout the trial.

Group Type EXPERIMENTAL

Bcl-XL Proteolysis Targeting Chimera DT2216

Intervention Type BIOLOGICAL

Given IV

Biospecimen Collection

Intervention Type PROCEDURE

Undergo blood sample collection

Irinotecan

Intervention Type DRUG

Given IV

Interventions

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Bcl-XL Proteolysis Targeting Chimera DT2216

Given IV

Intervention Type BIOLOGICAL

Biospecimen Collection

Undergo blood sample collection

Intervention Type PROCEDURE

Irinotecan

Given IV

Intervention Type DRUG

Other Intervention Names

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Antiapoptotic Protein Targeted Degrader DT2216 APTaD DT2216 Bcl-XL Degrader DT2216 Bcl-XL PROTAC DT2216 BCL-XL-specific PROTAC DT2216 DT 2216 DT-2216 DT2216 PROTAC Bcl-XL Deagrader DT2216 PROTAC DT2216 Proteolysis-targeting Chimera Protein Degrader DT2216 Biological Sample Collection Biospecimen Collected Specimen Collection

Eligibility Criteria

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Inclusion Criteria

* PHASE 1: Patients between ≥ 1 year and ≤ 21 years of age at the time of study enrollment
* PHASE 2: Patients between ≥ 1 year and ≤ 39 years of age at the time of study enrollment
* PHASE 1: Patients with recurrent/refractory solid tumors excluding primary central nervous system tumors
* PHASE 2: Patients with (FLC), which must include genomic confirmation of the DNAJB1:PRKACA fusion performed at a Clinical Laboratory Improvement Act (CLIA)-certified laboratory
* PHASE 1: Patients must have either measurable or evaluable disease
* PHASE 2: Patients must have measurable disease
* PHASE 1: Patient's current disease state must be one for which there is no known curative therapy or therapy proven to prolong survival with an acceptable quality of life
* PHASE 2: Patients must have FLC which is recurrent/refractory to at least one line of prior systemic therapy
* Patients with FLC that is unresectable at initial diagnosis but is not recurrent/refractory to at least one prior line of systemic therapy nor metastatic are NOT eligible for either phase 1 or phase 2
* Patients must have a performance status corresponding to Eastern Cooperative Oncology Group (ECOG) scores of 0, 1 or 2. Use Karnofsky for patients \> 16 years of age and Lansky for patients ≤ 16 years of age
* Patients must have fully recovered (grade \< 2) from the acute toxic effects of all prior anti-cancer therapy and must meet the following minimum duration from prior anti-cancer directed therapy prior to enrollment. If after the required timeframe, the numerical eligibility criteria are met, eg, blood count criteria, the patient is considered to have recovered adequately

* Cytotoxic chemotherapy or other anti-cancer agents known to be myelosuppressive: See Developmental Therapeutics (DVL) homepage on the Children's Oncology Group (COG) members site for commercial and investigational agent classifications. For agents not listed, the duration of this interval must be discussed with the study chair and the study-assigned research coordinator prior to enrollment

* Solid tumor patients: ≥ 21 days after the last dose of myelosuppressive chemotherapy (42 days if prior nitrosourea). Please refer to the table of myelosuppressive/anticancer agents on the COG website
* Anti-cancer agents not known to be myelosuppressive (eg, not associated with reduced platelet or absolute neutrophil count \[ANC\] counts): ≥ 7 days after the last dose of agent. See the DVL homepage on the COG Members site for commercial and investigational agent classifications. For agents not listed, the duration of this interval must be discussed with the study chair and the study-assigned research coordinator prior to enrollment
* Antibodies: ≥ 21 days must have elapsed from infusion of last dose of antibody, and toxicity related to prior antibody therapy must be recovered to grade ≤ 1
* Corticosteroids: If used to modify immune adverse events related to prior therapy, ≥ 14 days must have elapsed since last dose of corticosteroid
* Hematopoietic growth factors: ≥ 14 days after the last dose of a long-acting growth factor (eg, pegfilgrastim) or 7 days for short acting growth factor. For agents that have known adverse events occurring beyond 7 days after administration, this period must be extended beyond the time during which adverse events are known to occur
* Interleukins, interferons and cytokines (other than hematopoietic growth factors): ≥ 21 days after the completion of interleukins, interferon or cytokines (other than hematopoietic growth factors)
* Stem cell Infusions (with or without total body irradiation \[TBI\]):

* Allogeneic (non-autologous) bone marrow or stem cell transplant, or any stem cell infusion including donor lymphocyte infusion (DLI) or boost infusion: ≥ 84 days after infusion and no evidence of graft versus host disease (GVHD)
* Autologous stem cell infusion including boost infusion: ≥ 30 days
* Cellular therapy: ≥ 30 days after the completion of any type of cellular therapy (eg, modified T cells, natural killer \[NK\] cells, dendritic cells, etc.)
* Radiotherapy (XRT)/external beam irradiation including protons: ≥ 14 days after local XRT; ≥ 150 days after TBI, craniospinal XRT or if radiation to ≥ 50% of the pelvis; ≥ 42 days if other substantial bone marrow (BM) radiation
* Radiopharmaceutical therapy (eg, radiolabeled antibody, lobenguane I-131 \[131I-MIBG\]): ≥ 42 days after systemically administered radiopharmaceutical therapy
* Patients must not have received prior Bcl-xL specific therapy (e.g. navitoclax, DT2216). Prior therapy with irinotecan or other topoisomerase 1 inhibitors and/or other BH3 mimetics which are not Bcl-xL selective (e.g. venetoclax) are acceptable
* For patients with solid tumors without known bone marrow involvement: Peripheral absolute neutrophil count (ANC) ≥ 1000/µL
* For patients with solid tumors without known bone marrow involvement: Platelet count ≥ 100,000/µL (transfusion independent, defined as not receiving platelet transfusions for at least 7 days prior to enrollment)
* Patients with known bone marrow metastatic disease will be eligible for study provided they meet the blood counts (may receive transfusions provided they are not known to be refractory to red cell or platelet transfusions). These patients will not be evaluable for hematologic toxicity. At least 5 of every cohort of 6 patients must be evaluable for hematologic toxicity for the dose-escalation part of the study. If dose-limiting hematologic toxicity is observed, all subsequent patients enrolled must be evaluable for hematologic toxicity
* A creatinine based on age/gender as follows:

* 1 to \< 2 years: Maximum serum creatinine (mg/dL) 0.6 (male), 0.6 (female)
* 2 to \< 6 years: Maximum serum creatinine (mg/dL) 0.8 (male), 0.8 (female)
* 6 to \< 10 years: Maximum serum creatinine (mg/dL) 1 (male), 1 (female)
* 10 to \< 13 years: Maximum serum creatinine (mg/dL) 1.2 (male), 1.2 (female)
* 13 to \< 16 years: Maximum serum creatinine (mg/dL) 1.5 (male), 1.4 (female)
* 16 to ≤ 39 years: Maximum serum creatinine (mg/dL) 1.7 (male), 1.4 (female)

* OR a 24 hour urine creatinine clearance ≥ 70 mL/min/1.73 m\^2
* OR a glomerular filtration rate (GFR) ≥ 70 mL/min/1.73 m\^2. GFR must be performed using direct measurement with a nuclear blood sampling method OR direct small molecule clearance method (iothalamate or other molecule per institutional standard). Note: Estimated GFR (eGFR) from serum creatinine, cystatin C or other estimates are not acceptable for determining eligibility
* Patients with solid tumors: Bilirubin (sum of conjugated + unconjugated or total) ≤ 1.5 x upper limit of normal (ULN) for age
* Patients with solid tumors: Alanine aminotransferase (ALT) ≤ 3 x ULN, unless attributed to tumor involvement then ALT ≤ 5 x ULN

* Note: For the purposes of this study the ULN for ALT is defined as 45 U/L
* Patients with solid tumors: Aspartate aminotransferase (AST) ≤ 3 x ULN, unless attributed to tumor involvement then AST ≤ 5 x ULN

* Note: For the purposes of this study the ULN for AST is defined as 50 U/L
* Patients with solid tumors: Albumin ≥ 2 g/dL
* Patients with solid tumors: International normalized ratio (INR) ≤ 2.5
* Patients with seizure disorder may be enrolled if on anticonvulsants and well controlled as evidenced by no increase in seizure frequency in the prior 7 days. If needed, evaluate use of enzyme-inducing anticonvulsants
* Nervous system disorders (Common Terminology Criteria for Adverse Events \[CTCAE\] version \[v\]5) resulting from prior therapy must be ≤ grade 2, with the exception of decreased tendon reflex (DTR). Patient with any grade of tendon reflex decrease are eligible

Exclusion Criteria

* Pregnant or breast-feeding women will not be entered on this study due to risks of fetal and teratogenic adverse events as seen in animal/human studies, OR because there is yet no available information regarding human fetal or teratogenic toxicities. Pregnancy tests must be obtained in girls who are post-menarchal. Males or females of reproductive potential may not participate unless they have agreed to use two effective methods of birth control, including a medically accepted barrier or contraceptive method (eg, male or female condom) for the duration of the study. Abstinence is an acceptable method of birth control. Patients who could become pregnant should use highly effective contraception during therapy and for 6 months after the last irinotecan dose or 120 days after the last dose of DT2216, whichever is longer. Patients with partners who could become pregnant should use condoms during therapy and for 3 months after the last dose irinotecan or 120 days after the last dose of DT2216, whichever is longer
* Patients receiving corticosteroids who have not been on a stable or decreasing dose of corticosteroid for at least 7 days prior to enrollment are not eligible. If used to modify immune adverse events related to prior therapy, ≥ 14 days must have elapsed since last dose of corticosteroid
* Patients who are currently receiving another investigational drug are not eligible
* Patients who are currently receiving other anti-cancer agents are not eligible
* Patients who are receiving cyclosporine, tacrolimus or other agents to prevent graft-versus-host disease post bone marrow transplant are not eligible for this trial
* Patients who have received drugs that are strong inducers or inhibitors of CYP3A4 within 14 days prior to study enrollment are not eligible
* Patients with lymphoma are excluded
* Patients who have an uncontrolled infection are not eligible
* Patients with grade ≥ 2 diarrhea at baseline are not eligible
* Patients who have received a prior solid organ transplantation are not eligible
* Patients who in the opinion of the investigator may not be able to comply with the safety monitoring requirements of the study are not eligible
* Dedicated central nervous system (CNS) imaging is not required but patients with current active CNS metastasis whether symptomatic or discovered incidentally without clinical symptoms, are not eligible
* Patients with grade \> 2 corrected QT interval (i.e. electrocardiogram \[EKG\] showing corrected QT interval \[QTc\] \> 480 ms) at baseline are not eligible
* Surgical procedure

* Central line placement, open or core needle biopsy of sites other than liver: \< 2 days prior to enrollment.
* Open or laparoscopic biopsies or core needle biopsies of liver \< 7 days prior to enrollment.
* All other surgeries \< 14 days prior to enrollment
Minimum Eligible Age

1 Year

Maximum Eligible Age

39 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Children's Oncology Group

NETWORK

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Michael V Ortiz

Role: PRINCIPAL_INVESTIGATOR

Pediatric Early Phase Clinical Trial Network

Locations

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Children's Hospital of Alabama

Birmingham, Alabama, United States

Site Status RECRUITING

Children's Hospital Los Angeles

Los Angeles, California, United States

Site Status RECRUITING

Children's Hospital of Orange County

Orange, California, United States

Site Status RECRUITING

Children's Hospital Colorado

Aurora, Colorado, United States

Site Status RECRUITING

Children's National Medical Center

Washington D.C., District of Columbia, United States

Site Status RECRUITING

Children's Healthcare of Atlanta - Arthur M Blank Hospital

Atlanta, Georgia, United States

Site Status RECRUITING

Lurie Children's Hospital-Chicago

Chicago, Illinois, United States

Site Status RECRUITING

Riley Hospital for Children

Indianapolis, Indiana, United States

Site Status RECRUITING

Dana-Farber Cancer Institute

Boston, Massachusetts, United States

Site Status RECRUITING

C S Mott Children's Hospital

Ann Arbor, Michigan, United States

Site Status RECRUITING

University of Minnesota/Masonic Cancer Center

Minneapolis, Minnesota, United States

Site Status RECRUITING

Washington University School of Medicine

St Louis, Missouri, United States

Site Status RECRUITING

NYP/Columbia University Medical Center/Herbert Irving Comprehensive Cancer Center

New York, New York, United States

Site Status RECRUITING

Memorial Sloan Kettering Cancer Center

New York, New York, United States

Site Status RECRUITING

Cincinnati Children's Hospital Medical Center

Cincinnati, Ohio, United States

Site Status RECRUITING

Children's Hospital of Pittsburgh of UPMC

Pittsburgh, Pennsylvania, United States

Site Status RECRUITING

Saint Jude Children's Research Hospital

Memphis, Tennessee, United States

Site Status RECRUITING

Baylor College of Medicine/Dan L Duncan Comprehensive Cancer Center

Houston, Texas, United States

Site Status RECRUITING

Seattle Children's Hospital

Seattle, Washington, United States

Site Status RECRUITING

Countries

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United States

Facility Contacts

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Site Public Contact

Role: primary

205-638-9285

Site Public Contact

Role: primary

323-361-4110

Site Public Contact

Role: primary

714-509-8646

Site Public Contact

Role: primary

303-764-5056

Site Public Contact

Role: primary

202-476-2800

Site Public Contact

Role: primary

404-785-0232

Site Public Contact

Role: primary

773-880-4562

Site Public Contact

Role: primary

800-248-1199

Site Public Contact

Role: primary

877-442-3324

Site Public Contact

Role: primary

800-865-1125

Site Public Contact

Role: primary

612-624-2620

Site Public Contact

Role: primary

800-600-3606

Site Public Contact

Role: primary

212-342-5162

Site Public Contact

Role: primary

212-639-7592

Site Public Contact

Role: primary

513-636-2799

Site Public Contact

Role: primary

412-692-8570

Site Public Contact

Role: primary

888-226-4343

Site Public Contact

Role: primary

713-798-1354

Site Public Contact

Role: primary

866-987-2000

Other Identifiers

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NCI-2024-06357

Identifier Type: REGISTRY

Identifier Source: secondary_id

PEPN2411

Identifier Type: OTHER

Identifier Source: secondary_id

PEPN2411

Identifier Type: OTHER

Identifier Source: secondary_id

UM1CA228823

Identifier Type: NIH

Identifier Source: secondary_id

View Link

PEPN2411

Identifier Type: -

Identifier Source: org_study_id

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