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Clinical Trial Summary

This randomized phase II trial studies the side effects and how well melphalan hydrochloride works in treating patients with multiple myeloma that has come back or does not respond to treatment. Drugs used in chemotherapy, such as melphalan hydrochloride, work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading.


Clinical Trial Description

PRIMARY OBJECTIVES:

I. Identify whether targeting approximate (approx.) 3- or 5-days of severe neutropenia after exposure to a personalized melphalan hydrochloride (melphalan) dose results in best clinical outcome.

II. Measure melphalan-related toxicities in both 3-day and 5-day arms. III. Measure response per International Myeloma Working Group (IMWG). IV. Record overall survival (OS) and progression free survival (PFS).

SECONDARY OBJECTIVES:

I. To administer a test dose of melphalan and obtain test dose melphalan pharmacokinetics (PK) data from the first 33 patients.

II. Measure drug-induced deoxyribonucleic acid (DNA) damage in peripheral blood mononuclear cells (PBMCs) treated with melphalan ex vivo post exposure.

III. Measure drug-induced DNA damage in patient myeloma cells treated with melphalan ex vivo.

IV. Assess melphalan-induced DNA damage in treated patients. V. Measure allele and genotype frequencies of variants, as well as gene expression of XRCC1 rs25487 and XRCC3 rs861529.

VI. Additional genetic variants relevant to DNA repair, melphalan transport, and clinical toxicities may be tested as well.

VII. Test cytotoxicity (half maximal inhibitory concentration [IC50]) of patient PBMCs prior to autologous transplant after exposure to melphalan ex vivo.

VIII. Measure p53 and phospho(TP53) in patient PBMCs prior to autologous transplant at baseline and after exposure to melphalan ex vivo.

IX. Incorporate both disease progression and drug-related toxicities into separate models linked to our calculated melphalan area under the curve (AUC) model.

OUTLINE: Patients are randomized into 1 of 2 arms.

ARM I: Patients receive personalized dose of melphalan hydrochloride intravenously (IV) on day -2 for predicted 3-day duration of severe neutropenia and undergo standard of care autologous stem cell transplant on day 0.

ARM II: Patients receive personalized dose of melphalan hydrochloride IV on day -2 for predicted 5-day duration of severe neutropenia and undergo standard of care autologous stem cell transplant on day 0.

After completion of study treatment, patients are followed up for 30 days, at 3 months after transplant, and then every 6-12 months. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03328936
Study type Interventional
Source Ohio State University Comprehensive Cancer Center
Contact
Status Withdrawn
Phase Phase 2
Start date September 1, 2018
Completion date March 31, 2021

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