Clinical Trial: Minimal Residual Disease as a Possible Predictive Factor for Relapse in Patients With AL Amyloidosis

Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Observational

Official Title: Minimal Residual Disease as a Possible Predictive Factor for Relapse in Patients With AL Amyloidosis

Brief Summary: This protocol will assess patients with AL amyloidosis who achieve a complete response (CR) or very good partial response (VGPR) to therapy for minimal residual disease (MRD). Three approaches to MRD testing will be used since there is no established method. The investigators will clone and sequence each patient's light chain (LC) gene and design patient-specific primers to evaluate genomic DNA from future marrow specimens. Whole genome sequencing (WGS) will be used to test baseline and follow-up marrow cell DNA, seeking copy number variations in chromosomes 1 and 2 or 22, and structural variations in chromosomes 11 and 14, consistent with the known genetic abnormalities in AL and with clonal LC gene use. Plasma protein analysis by mass spectrometry will also be used to look for fragmentary protein sequences associated with the culprit LC gene of each subject. The feasibility and predictive value of these three approaches in patients achieving CR or VGPR will be evaluated. This protocol will help provide insight into the ways that the disease changes and progresses. MRD testing is likely an important next step in AL management.

Detailed Summary:

This protocol will assess AL amyloidosis patients who achieve a CR or VGPR to first-line therapy for evidence of MRD by Q-PCR, NGS, and plasma protein analysis by mass spectrometry using marrow cells obtained annually at times of standard clinical evaluations.

A bone marrow aspirate sample from diagnosis will be used to create a baseline profile of each patient's disease. This sample will allow the investigators to create the primer-probe sets required for MRD testing by Q-PCR, which will be conducted after the patient has achieved a CR or VGPR. A baseline bone marrow biopsy sample will either be taken at the time of consent or can be taken from storage if the patient has previously consented to have their marrow cells banked for research purposes. An extra 15 mL of aspirate will be taken from their diagnostic bone marrow biopsy, which is routinely conducted on newly diagnosed patients for clinical purposes. Annual bone marrow aspirates will not be taken for research purposes until after the patient has responded. Patients will remain on protocol, but only begin MRD testing after achieving a CR or VGPR to first-line therapy at which point annual marrow collections for MRD testing will begin. In the event the patient does not reach a CR or VGPR to first-line therapy, the baseline bone marrow aspirate from diagnosis will be discarded.

Patients who choose to allow their marrow to be used in this study will sign a consent form specifically for this study. At the time of consent, three green top tubes of peripheral blood will be obtained for WGS of non-tumor cells. No further blood samples will be required for this study. After achieving a CR or VGPR, patients will be completely re-staged as is standard of care at annual intervals. Samples to test for the presence of MRD in their marrows will be obtained at these times of clini
Sponsor: Tufts Medical Center

Current Primary Outcome: Minimal Residual Disease Testing by Q-PCR, NGS, and mass spectrometry [ Time Frame: 3 years ]

After achievement of a CR or VGPR, minimal residual disease testing (using Q-PCR, WGS, and plasma protein analysis by mass spectrometry) will be done annually for up to 3 years. These tests will show either the presence of absence of minimal residual disease. These findings will then be correlated with progression free survival as assessed through standard clinical tests for AL amyloidosis.


Original Primary Outcome: Minimal Residual Disease Testing by Q-PCR and NGS of Bone Marrow Aspirate [ Time Frame: 3 years ]

After achievement of a CR or VGPR, minimal residual disease testing (using Q-PCR and WGS) will be done annually for up to 3 years. These tests will show either the presence of absence of minimal residual disease. These findings will then be correlated with progression free survival as assessed through standard clinical tests for AL amyloidosis.


Current Secondary Outcome:

Original Secondary Outcome:

Information By: Tufts Medical Center

Dates:
Date Received: September 16, 2015
Date Started: August 2015
Date Completion: August 2020
Last Updated: January 9, 2017
Last Verified: January 2017