ADVL1614: A Phase 1/2 Trial of VX15/2503 in Children, Adolescents, or Young Adults With Recurrent or Relapsed Solid Tumors

Why are we doing this research?


This phase I/II trial studies the side effects and best dose of anti-SEMA4D monoclonal antibody VX15/2503 (VX15/2503) and to see how well it works in treating younger patients with solid tumors that have come back after treatment, or do not respond to treatment. Monoclonal antibodies, such as VX15/2503, may interfere with the ability of tumor cells to grow and spread.



  • To estimate the maximum tolerated dose (MTD) and/or recommended Phase 2 dose of VX15/2503 administered as an intravenous infusion every 14 days to children with recurrent or refractory solid tumors. (Part A) II. To define and describe the toxicities of VX15/2503 administered on this schedule. (Parts A-B) III. To characterize the pharmacokinetics of VX15/2503 in children with recurrent or refractory cancer. (Parts A-B) IV. To preliminarily define the antitumor activity of VX15/2503 for the treatment of relapsed or refractory osteosarcoma. (Part B) V. To determine if VX15/2503 either improves the disease control rate at 4 months in patients with recurrent measurable osteosarcoma or produces an objective response rate in patients with relapsed or refractory osteosarcoma.

Study Type: Interventional
Intervention Model: Single Group Assignment
Masking: None

Primary Purpose: Treatment

Who can participate?

AGES ELIGIBLE FOR STUDY: 12 Months to 30 Years


Inclusion Criteria:

  • Parts A: Patients with recurrent or refractory solid tumors are eligible, excluding central nervous system (CNS) tumors; patients must have had histologic verification of malignancy at original diagnosis or relapse
  • Part B: Patients with recurrent or refractory osteosarcoma are eligible; patients must have had histologic verification of malignancy at original diagnosis or relapse
  • Parts A: Patients must have either measurable or evaluable disease
  • Part B: Patients must have measurable disease
  • 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
  • Karnofsky >= 50% for patients > 16 years of age and Lansky >= 50 for patients =< 16 years of age; 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
  • Patients must have fully recovered 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, e.g. blood count criteria, the patient is considered to have recovered adequately
    • Cytotoxic chemotherapy or other anti-cancer agents known to be myelosuppressive
      • >= 21 days after the last dose of cytotoxic or myelosuppressive chemotherapy (42 days if prior nitrosourea)
    • Anti-cancer agents not known to be myelosuppressive (e.g. not associated with reduced platelet or absolute neutrophil count [ANC] counts): >= 7 days after the last dose of agent
    • 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 (e.g. 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; the duration of this interval must be discussed with the study chair and the study-assigned research coordinator
    • 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: >= 42 days
    • Cellular Therapy: >= 42 days after the completion of any type of cellular therapy (e.g. modified T cells, natural killer [NK] cells, dendritic cells, etc.)
    • Radiation Therapy (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 (e.g., radiolabeled antibody, 131I-MIBG): >= 42 days after systemically administered radiopharmaceutical therapy
  • Patients must not have received prior exposure to VX15/2503
  • Peripheral absolute neutrophil count (ANC) >= 1000/mm^3
  • Platelet count >= 100,000/mm^3 (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 above (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
  • Creatinine clearance or radioisotope glomerular filtration rate (GFR) >= 70ml/min/1.73 m^2 or
  • A serum creatinine based on age/gender as follows:
    • Age: 1 to < 2 years; Male: 0.6 mg/dL; Female: 0.6 mg/dL
    • Age: 2 to < 6 years; Male: 0.8 mg/dL; Female: 0.8 mg/dL
    • Age: 6 to < 10 years; Male: 1 mg/dL; Female: 1 mg/dL
    • Age: 10 to < 13 years; Male: 1.2 mg/dL; Female: 1.2 mg/dL
    • Age: 13 to < 16 years; Male: 1.5 mg/dL; Female: 1.4 mg/dL
    • Age: >= 16 years; Male: 1.7 mg/dL; Female: 1.4 mg/dL
  • Bilirubin (sum of conjugated + unconjugated) =< 1.5 x upper limit of normal (ULN) for age
  • Serum glutamic pyruvic transaminase (SGPT) (alanine aminotransferase [ALT]) =< 135 U/L; for the purpose of this study, the ULN for SGPT is 45 U/L
  • Serum albumin >= 2 g/dL
  • Pulse oximetry > 94% on room air if there is clinical indication for determination (e.g. dyspnea at rest)
  • All patients and/or their parents or legally authorized representatives must sign a written informed consent; assent, when appropriate, will be obtained according to institutional guidelines
  • Tissue blocks or slides must be sent; if tissue blocks or slides are unavailable, the study chair must be notified prior to enrollment.

Exclusion Criteria:

  • Pregnant or breast-feeding women will not be entered on this study; 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 an effective contraceptive method for the duration of study therapy
  • Patients receiving systemic 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 systemic corticosteroid; Note: patients who are using topical or inhaled corticosteroids are eligible
  • Patients who are currently receiving another investigational drug are not eligible
  • Patients who are currently receiving other anti-cancer agents are not eligible (except leukemia patients receiving hydroxyurea, which may be continued until 24 hours prior to start of protocol therapy)
  • 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 an uncontrolled infection 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.


  • Sarcoma Osteosarcoma Relapse
  • Adult - Sarcoma Osteosarcoma Relapse
  • Sarcoma Ewing Relapse
  • Adult - Sarcoma Ewing Relapse
  • Sarcoma Rhabdomyosarcoma Relapse
  • Adult - Sarcoma Rhabdomyosarcoma Relapse
  • Neuroblastoma Relapse - Refractory
  • Adult - Neuroblastoma Relapse - Refractory
  • Liver Relapse - Refractory
  • Adult - Liver Relapse - Refractory
  • Adult - Kidney Relapse - Refractory
  • Kidney Relapse - Refractory
  • Solid Tumor Retinoblastoma Relapse - Refractory
  • Adult - Solid Tumor Retinoblastoma Relapse - Refractory
  • Adult - Solid Tumor Melanoma Relapse - Refractory
  • Solid Tumor Melanoma Relapse - Refractory
  • Solid Tumor Germ Cell Tumor Relapse - Refractory
  • Adult - Solid Tumor Germ Cell Tumor Relapse - Refractory
  • Solid Tumors - All Other
  • Adult - Solid Tumors - All Other


Cincinnati Children’s Hospital Medical Center
Division of Hematology/Oncology
3333 Burnet Ave., Cincinnati, OH 45229-3039
Phone: 513-636-2799