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MRNA in Exosomas As a Liquid Biopsy in Non-Hodgkin Lymphoma: a Multicentric Study by the Spanish Lymphoma Oncology Group

Overview
Journal Oncotarget
Specialty Oncology
Date 2017 Sep 9
PMID 28881619
Citations 25
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Abstract

Purpose: To determine the feasibility of mRNAs ( and ) in exosomes of plasma as a liquid biopsy method for monitoring and prognostic evolution in B-cell lymphomas.

Patients And Methods: Exosomes were isolated from 98 patients with B-cell Lymphoma and 68 healthy controls. mRNAs were analyzed by quantitative PCR. An additional 31 post-treatment samples were also studied.

Results: In the general and follicular lymphoma series, the presence of mRNA was associated with poor response to rituximab-based treatment. Patients with first relapse or disease progression showed a lower percentage of and mRNA. The presence of mRNA was associated with a high death rate. The absence of mRNA in the general series, and presence of mRNA in follicular lymphomas, were associated with short progression-free survival. and mRNA were independent prognostic variables of overall survival. mRNA may provide prognostic information with respect to overall survival. mRNA and increase of mRNA in post-treatment samples could serve as molecular monitoring markers.

Conclusions: This is the first large study to evaluate the prognostic and predictive values of pretreatment tumor-associated mRNA in exosomes. BCL-6 and C-MYC mRNA positivity in pretreatment samples were predictors of worse PFS compared to patients with mRNA negativity. C-MYC mRNA positivity was also a statistically significant predictor of inability to obtain complete response with first-line therapy.

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