Glucarpidase After High-Dose Methotrexate in Patients With Osteosarcoma

An Open-Label, Multi-Institutional Pilot Study to Assess the Use of Glucarpidase in Adult Patients With Osteosarcoma Receiving High-Dose Methotrexate

This early phase I trial studies how well glucarpidase works in reducing toxicity in patients with osteosarcoma receiving high dose methotrexate treatment. Glucarpidase may reduce the levels of methotrexate in patients' blood and lead to shorter hospitalizations and a reduction in toxicities.

Study Overview

• Status: Active, not recruiting
• Conditions: Osteosarcoma
• Intervention / Treatment: Other: Quality-of-Life Assessment; Drug: Glucarpidase

Detailed Description

PRIMARY OBJECTIVE:

I. To determine the rate of completion of 4 planned high dose methotrexate (HDMTX) doses when glucarpidase is administered after each dose.

SECONDARY OBJECTIVES:

I. To assess the length of hospital stay (LOS) associated with methotrexate (MTX) clearance following administration of glucarpidase 24 hours after HDMTX.

II. To assess the LOS associated with all causes following administration of glucarpidase 24 hours after HDMTX.

III. To assess the impact of glucarpidase administration on HDMTX efficacy. IV. To assess the safety and tolerability of 4 doses of HDMTX administered with glucarpidase in an adult osteosarcoma population.

V. To assess the efficacy of glucarpidase flat dose of 1,000 units.

OUTLINE:

Patients receive standard of care HDMTX intravenously (IV) over 4 hours on day 1 of weeks 4, 5, 9, and 10. After 24 and 48 hours after the start of each HDMTX infusion, patients also receive glucarpidase IV over 5 minutes in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo blood sample collection throughout the study.

After completion of study treatment, patients are followed up for 32 weeks.

• Study Type: Interventional
• Enrollment (Actual): 12
• Phase: Early Phase 1

Contacts and Locations

Study Locations

• United States
  • Florida
    • Jacksonville, Florida, United States, 32224-9980
      • Mayo Clinic in Florida
  • Oregon
    • Portland, Oregon, United States, 97239
      • OHSU Knight Cancer Institute
  • Pennsylvania
    • Philadelphia, Pennsylvania, United States, 19104
      • University of Pennsylvania/Abramson Cancer Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 25 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• All races and ethnic groups will be eligible

  • A minimum of 6 individuals aged >= 40 years will be enrolled. These participants are considered high-risk.
• Eastern Cooperative Oncology Group (ECOG) performance score 0-2.
• Participants must have pathologically confirmed diagnosis of osteosarcoma. Participants must be newly diagnosed and previously untreated, although initiation of doxorubicin/cisplatin prior to enrollment is permitted.
• Participants must have a recommended treatment plan for their osteosarcoma that includes planned MTX treatment at 8-12 g/m^2.
• Absolute neutrophil count (ANC) >= 1,000/mm^3 (or >= 1.0 x 10^9/L).
• Platelet count 75,000/mm^3 (or >= 75 x 10^9/L).
• Hemoglobin >= 8 g/dL.
• Serum creatinine =< 1.5 x the upper limit of normal (ULN), or glomerular filtration rate (GFR) >= 60 ml/min/1.73 m^2 as calculated by the Modification of Diet in Renal Disease (MDRD) formula.
• Total serum bilirubin =< 2 x ULN.
• Serum aspartate transaminase (AST) and/or alanine transaminase (ALT) =< 2.5 x ULN.
• Participants must be willing to use appropriate contraception for the duration of study treatment and four months after completing HDMTX therapy.
• Ability to understand and the willingness to sign a written informed consent document.

Exclusion Criteria:

• Malignant disease, other than those being treated in this study. Exceptions to this exclusion include the following:

  • Malignancies that were treated curatively and have not recurred within 2 years after completion of treatment;
  • Completely resected basal cell and squamous cell skin cancers;
  • Any malignancy considered to be indolent and that has never required therapy;
  • Completely resected carcinoma in situ of any type.
• Participants with rapidly progressive disease or organ dysfunction that would prevent them from receiving planned HDMTX treatment regimen.
• Previous MTX treatment at doses >= 3 g/m^2.
• Previous treatment with glucarpidase.
• Known clinically significant liver disease defined as ongoing drug-induced liver injury, chronic active hepatitis C (HCV), chronic active hepatitis B (HBV), alcoholic liver disease, non-alcoholic steatohepatitis, primary biliary cirrhosis, extrahepatic obstruction caused by cholelithiasis, cirrhosis of the liver, portal hypertension, or history of autoimmune hepatitis. Patients who have completed curative therapy for HCV are eligible. Patients with known history of human immunodeficiency virus (HIV) infection are eligible.
• Participants with a history of hypersensitivity reactions to study agent or its excipients.
• Participants with a history of hypersensitivity to Escherichia (E.)coli-derived proteins.
• Participants with large pleural or ascitic fluid collection.
• Participant is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the trial, starting with the screening visit through 120 days after the last dose of trial treatment.
• Uncontrolled intercurrent illness, or psychiatric illness/social situations that, in the opinion of the investigator, would limit compliance with study requirement, substantially increase risk of incurring AEs or compromise the ability of the patient to give written informed consent.
• Unable or unwilling to discontinue use of agents that interact significantly with methotrexate metabolism or excretion.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Treatment (glucarpidase); Patients receive standard of care HDMTX IV over 4 hours on day 1 of weeks 4, 5, 9, and 10. After 24 hours after the start of each HDMTX infusion, patients also receive glucarpidase IV over 5 minutes in the absence of disease progression or unacceptable toxicity.	Other: Quality-of-Life Assessment; Ancillary studies; Other Names: Quality of Life Assessment; Drug: Glucarpidase; Given IV; Other Names: Acetylaspartylglutamate Dipeptidase; Carboxypeptidase G2; carboxypeptidase-G2; CPDG2; CPG2; Poly(gamma-glutamic Acid) Endohydrolase; Pteroylpolygammaglutamyl Hydrolase; Voraxaze

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Proportion of subjects completing 4 planned doses of high dose methotrexate (HDMTX)	Will be estimated with an exact 95% confidence interval (CI).	Time from first dose of HDMTX to time of last dose of HDMTX (week 10)

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Length of hospital stay (LOS) for methotrexate (MTX) clearance		Time of start of MTX administration to time of MTX =< 0.1uM sample collection for each planned MTX infusion (up to 15 days)
LOS for all causes (excluding MTX-related AEs)		Date of admission for each planned MTX infusion to date of discharge for each planned MTX infusion (up to 15 days)
Length of hospital stay (LOS) for methotrexate (MTX)-related adverse events (AEs)		Date of admission for each planned MTX infusion to date of discharge for each planned MTX infusion (up to 15 days)
Percent treatment effect at resection	Defined as an admixture of degenerating wispy osteoid matrix with empty lacunae, necrotic ghost cells, and edematous stroma with loose fibrous tissue. Dense fibrosis or hyalinization or sheets of sclerotic acellular osteoid may also be present. These features are quantified by estimating the percentage of each parameter in each tumor slide and calculating the mean based on the total number of tumor slides examined. The percentage of tumor necrosis or treatment effect will be recorded from each participant's surgical pathology report.	From start of surgery until end of surgery
Incidence of glucarpidase hypersensitivity	Will be assessed according to Common Terminology Criteria for Adverse Events (CTCAE) version (v) 5.0. Will be determined for participants that received at least 1 dose of glucarpidase following an HDMTX infusion. The 95% CI will be reported with the point estimate of toxicity rate.	From first dose of glucarpidase until 30 days after last dose of glucarpidase
Incidence of glucarpidase neutralizing antibodies	Will be determined for participants that received at least 1 dose of glucarpidase following an HDMTX infusion. The 95% CI will be reported with the point estimate of toxicity rate.	From first dose of glucarpidase to 30 days after last dose of glucarpidase
Incidence and severity of MTX-related toxicities	Will be assessed according to CTCAE v 5.0. Will be determined for participants that received at least 1 dose of glucarpidase following an HDMTX infusion. The 95% CI will be reported with the point estimate of toxicity rate.	From start of first planned MTX infusion to 30 days after last dose of MTX
Incidence and severity of glucarpidase toxicities	Will be assessed according to CTCAE v 5.0. Will be determined for participants that received at least 1 dose of glucarpidase following an HDMTX infusion. The 95% CI will be reported with the point estimate of toxicity rate.	From first dose of glucarpidase to 30 days after last dose of glucarpidase
MTX and DAMPA serum concentration (umol/L) at 4, 24, 24.5, 36, 48 and every 24 hours after the start of MTX infusion		From start of each planned MTX infusion to time when MTX =< 0.1 uM (for each planned MTX infusion) (up to 15 days)
Proportion of glucarpidase doses (flat dose) that result in MTX serum concentration reduction of >= 97% from hour 24 to hour 24.5	Will be presented along with 95% confidence intervals. Summary statistics will be reported on the efficacy analysis set with sub-analyses stratified by glucarpidase dose.	From first dose of glucarpidase to end of study treatment (week 10)
Proportion of glucarpidase doses (flat dose) that result in 48 hour serum MTX level < 1 uM	Will be presented along with 95% confidence intervals. Summary statistics will be reported on the efficacy analysis set with sub-analyses stratified by glucarpidase dose.	From first dose of glucarpidase to end of study treatment (week 10)

Collaborators and Investigators

• Sponsor: OHSU Knight Cancer Institute
• Collaborators: Oregon Health and Science University; BTG International Inc.
• Investigators: Principal Investigator: Christopher Ryan, OHSU Knight Cancer Institute

Study record dates

Study Major Dates

• Study Start (Actual): March 27, 2019
• Primary Completion (Estimated): December 31, 2026
• Study Completion (Estimated): December 31, 2026

Study Registration Dates

• First Submitted: May 13, 2019
• First Submitted That Met QC Criteria: May 21, 2019
• First Posted (Actual): May 22, 2019

Study Record Updates

• Last Update Posted (Estimated): January 7, 2026
• Last Update Submitted That Met QC Criteria: January 5, 2026
• Last Verified: January 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms; Neoplasms by Histologic Type; Sarcoma; Neoplasms, Connective and Soft Tissue; Neoplasms, Bone Tissue; Neoplasms, Connective Tissue; Osteosarcoma; Hydrolases; Enzymes; Enzymes and Coenzymes; Peptide Hydrolases; Carboxypeptidases; Exopeptidases; glucarpidase; gamma-Glutamyl Hydrolase
• Other Study ID Numbers: STUDY00019380 (Other Identifier: OHSU Knight Cancer Institute); NCI-2019-02257 (Registry Identifier: CTRP (Clinical Trial Reporting Program))

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No