scholarly journals Monitoring minimal residual disease in canine lymphomas treated with modified L-COP or L-CHOP protocols

2018 ◽  
Vol 66 (1) ◽  
pp. 66-84
Author(s):  
Sirintra Sirivisoot ◽  
Patharakrit Teewasutrakul ◽  
Somporn Techangamsuwan ◽  
Sirikachorn Tangkawattana ◽  
Anudep Rungsipipat
Keyword(s):  
T Cell ◽  
Minimal Residual Disease ◽  
Residual Disease ◽  
Cell Lymphoma ◽  
Clinical Stage ◽  
Progression Free Survival ◽  
B Cell Lymphoma ◽  
Blood Leukocytes ◽  
Free Survival ◽  
Minimal Residual

Heteroduplex polymerase chain reaction for antigen receptor rearrangements (hPARR) was developed to monitor minimal residual disease (MRD) in canine B- and T-cell lymphomas treated with the modified L-COP or L-CHOP protocol. Thirty-five dogs were recruited in this study and their neoplastic lineages were determined by immunophenotyping with Pax5 and CD3. Peripheral blood leukocytes were collected prior to and during chemotherapy in weeks 4, 9 and 13 to detect MRD by hPARR. Twenty-eight dogs (80%) had B-cell lymphoma while seven dogs (20%) had T-cell lymphoma. A monoclonal band was detected in 11 cases that showed complete or partial remission before tumour relapse and no response to the current treatment without statistical difference in clinical outcomes; however, the treatment response had an association with the MRD result (P < 0.05). Modified L-CHOP prolonged median progression-free survival as compared to modified L-COP (215 days vs. 93 days; P < 0.05). Substage b had shorter progression-free survival than substage a (90 days vs. 215 days; P < 0.05). Clinical stage III affected median overall survival time when compared to clinical stages IV and V (432, 173 and 118 days, respectively; P < 0.05). hPARR could be used for screening refractory lymphoma together with lymph node measurement in routine clinical cases.

scholarly journals Assessment of Clonotypic Rearrangements and Minimal Residual Disease in Lymphoid Malignancies: A Large Cancer Center Experience Using clonoSEQ

2021 ◽  
Author(s):  
Mohammad O. Hussaini ◽  
Jaya Srivastava ◽  
Lik Wee Lee ◽  
Taiga Nishihori ◽  
Bijal D. Shah ◽  
...  
Keyword(s):  
T Cell ◽  
Minimal Residual Disease ◽  
Plasma Cell ◽  
Residual Disease ◽  
Cell Lymphoma ◽  
B Cell Lymphoma ◽  
Response Strategy ◽  
Cancer Center ◽  
Lymphoid Malignancies ◽  
Minimal Residual

Context.— Measurable (minimal) residual disease (MRD) is an independent prognostic factor for survival outcomes in patients with lymphoid and plasma cell malignancies and has been incorporated into consensus criteria regarding treatment response, strategy, and clinical trial endpoints. clonoSEQ (a next-generation sequencing [NGS]-MRD assay) uses multiplex polymerase chain reaction and NGS to identify clonotypic rearrangements at the immunoglobulin (Ig) H, IgK, IgL, T-cell receptor (TCR)-β, and TCR-γ loci, and translocated B-cell lymphoma 1/IgH and 2/IgH sequences for MRD assessment. Additionally, it can be used to confirm diagnoses of cutaneous T-cell lymphoma (CTCL). Objective.— To review the technical aspects of our experience using the clonoSEQ Assay in routine clinical practice. Design.— In this single-center experience, 390 patients with lymphoid and plasma cell malignancies were assessed with the NGS-MRD Assay at a central laboratory. Results.— Median time from arrival of the shipment to initiation of the assay (defined as captured in Adaptive's secure tracking system) was 2.1 hours. Overall, 317 patients had 1 or more samples submitted for sequence identification. Of these, 290 (91.5%) had trackable sequences identified. The median calibration rate of samples by malignancy (where n ≥ 10 samples, excluding CTCL samples) was 88.1%, across a variety of fresh and archived sample sources (177 of 201 samples). TCR-β and/or TCR-γ clonotypes were identified in 40 of 95 samples (42.1%) from 66 patients with suspected CTCL. Conclusions.— This NGS-MRD Assay is a valuable and sensitive tool for monitoring MRD in patients with plasma cell and lymphoid malignancies and assisting in the diagnosis of CTCL.

Detection and impact of minimal residual disease on outcome of chronic lymphocytic leukemia

2012 ◽  
Vol 153 (41) ◽  
pp. 1622-1628
Author(s):  
Márk Plander ◽  
Judit Skrapits ◽  
Tünde Bozsó ◽  
Tamás Szendrei ◽  
János László Iványi
Keyword(s):  
Overall Survival ◽  
Chronic Lymphocytic Leukemia ◽  
Complete Remission ◽  
Minimal Residual Disease ◽  
Residual Disease ◽  
Single Agent ◽  
Progression Free Survival ◽  
Lymphocytic Leukemia ◽  
Free Survival ◽  
Minimal Residual

Introduction: Minimal residual disease is associated with longer overall survival in patients with chronic lymphocytic leukemia. Aim: The aim of the authors was to determine the clinical significance of remission and minimal residual disease on the survival of patients with chronic lymphocytic leukemia. Methods: Data from 42 first-line treated patients with chronic lymphocytic leukemia were analyzed. Minimal residual disease was determined by flow cytometry. Results: Overall response and complete remission was achieved in 91%, 86%, 100% and 87%, 0%, 60% of patients with fludarabine-based combinations, single-agent fludarabine and cyclophosphamide + vincristin + prednisolone regimen, respectively. Minimal residual disease eradication was feasible only with fludarabine-based combinations in 60% of these cases. The ratio of minimal residual disease was 0.5% on average. During a median follow-up period lasting 30 months, the overall survival of patients with fludarabine-resistant disease proved to be significantly shorter (p = 0.04), while complete remission without minimal residual disease was associated with significantly longer progression free survival (p = 0.02). Conclusion: Only fludarabine-based combinations were able to eradicate minimal residual disease in patients with chronic lymphocytic leukemia. Complete remission without minimal residual disease may predict longer progression free survival in these patients. Orv. Hetil., 2012, 153, 1622–1628.

Survival of Limited Stage Peripheral T-Cell Lymphoma Is Similar To Diffuse Large B-Cell Lymphoma.

Blood ◽  
2005 ◽  
Vol 106 (11) ◽  
pp. 2817-2817 ◽  
Author(s):  
Kerry J. Savage ◽  
Mukesh Chhanabhai ◽  
Nicholas Voss ◽  
Shenkier Tamara ◽  
Randy D. Gascoyne ◽  
...  
Keyword(s):  
Overall Survival ◽  
T Cell ◽  
B Cell ◽  
Cell Lymphoma ◽  
Progression Free Survival ◽  
B Cell Lymphoma ◽  
Free Survival ◽  
Limited Stage ◽  
Large B Cell Lymphoma ◽  
Large B Cell

Abstract Background: Peripheral T-cell lymphomas (PTCL) represent a heterogeneous group of diseases with an overall poor prognosis. Little information is available regarding the outcome of PTCL patients who present with limited stage disease. We sought to determine the outcome of PTCL patients presenting with limited disease in comparison with a cohort of patients with limited stage diffuse large B-cell lymphoma (DLBCL). Methods: In a retrospective analysis we identified all patients with limited stage (non-bulky (<10cm) stage I/II disease no symptoms) PTCL diagnosed at the British Columbia Cancer Agency (BCCA) between 1983 and 2004. Patients were excluded if they had cutaneous anaplastic large cell lymphoma (CutALCL) (n=13), NK/T-cell lymphoma nasal type (n=9) or primary CNS/ocular involvement (n=6). Results: Thirty-seven patients with PTCL were identified according to the World Health Organization Classification: ALK-neg ALCL 8 (22%); PTCL-unspecified (PTCLUS) 28 (78%); enteropathy associated TCL (EATL) 1 (3 %). The majority received CHOP-type chemotherapy (n=31, 86%), most with brief chemotherapy followed by involved-field radiation (n=19, 61%). The 5 y OS and PFS was similar between PTCLUS and ALK-neg ALCL. There was no difference in survival between extranodal and nodal cases. The outcome of PTCL patients (including ALK-neg ALCL and PTCLUS) was compared to a cohort of limited stage DLBCL patients (excluding CNS/ocular lymphoma) (n=305) diagnosed over the same time period and treated similarly. There was no difference in 5 y OS or PFS (Figure 1,2). Interestingly, there were no late relapses observed in PTCLUS, in marked contrast to DLBCL. Conclusions: Limited stage PTCL is rare, however outcomes appear to be comparable to early stage DLBCL, supporting that they should be treated in a similar manner. Unlike limited stage DLBCL where late relapses occur, a plateau in the progression-free survival curve is observed, highlighting a distinct natural history for limited stage PTCL. Overall Survival Limited Stage PTCL vs DLBCL p=.18 Overall Survival Limited Stage PTCL vs DLBCL p=.18 Progression-Free Survival Limited Stage PTCL vs DLBCL p=.07 Progression-Free Survival Limited Stage PTCL vs DLBCL p=.07

scholarly journals HashClone: a new tool to quantify the minimal residual disease in B-cell lymphoma from deep sequencing data

2017 ◽  
Vol 18 (1) ◽  
Author(s):  
Marco Beccuti ◽  
Elisa Genuardi ◽  
Greta Romano ◽  
Luigia Monitillo ◽  
Daniela Barbero ◽  
...  
Keyword(s):  
B Cell ◽  
Minimal Residual Disease ◽  
Deep Sequencing ◽  
Residual Disease ◽  
Cell Lymphoma ◽  
B Cell Lymphoma ◽  
Sequencing Data ◽  
Deep Sequencing Data ◽  
Minimal Residual
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