Moving Beyond Autologous Transplantation in Multiple Myeloma: Consolidation, Maintenance, Allogeneic Transplant, and Immune Therapy

2016 ◽  
pp. 210-221 ◽  
Author(s):  
Amrita Krishnan ◽  
Ravi Vij ◽  
Jesse Keller ◽  
Binod Dhakal ◽  
Parameswaran Hari
Keyword(s):  
Multiple Myeloma ◽  
Disease Control ◽  
Minimal Residual Disease ◽  
Residual Disease ◽  
The Other ◽  
Novel Agents ◽  
Patient Specific ◽  
High Dose ◽  
Hematopoietic Stem ◽  
Minimal Residual

For multiple myeloma, introduction of novel agents as part of the front-line treatment followed by high-dose chemotherapy and autologous hematopoietic stem cell transplantation (ASCT) induces deep responses in a majority of patients with this disease. However, disease relapse is inevitable, and, with each relapse, the remission duration becomes shorter, ultimately leading to a refractory disease. Consolidation and maintenance strategy after ASCT is one route to provide sustained disease control and prevent repeated relapses. Though the consolidation strategy remains largely confined to clinical trials, significant data support the efficacy of consolidation in improving the depth of response and outcomes. There are also increasing rates of minimal residual disease–negativity with additional consolidation therapy. On the other hand, maintenance with novel agents post-transplant is well established and has been shown to improve both progression-free and overall survival. Evolving paradigms in maintenance include the use of newer proteasome inhibitors, immunotherapy maintenance, and patient-specific maintenance—a concept that utilizes minimal residual disease as the primary driver of decisions regarding starting or continuing maintenance therapy. The other approach to overcome residual disease is immune therapeutic strategies. The demonstration of myeloma-specific alloimmunity from allogeneic transplantation is well established. More sophisticated and promising immune approaches include adoptive cellular therapies, tumor vaccines, and immune checkpoint manipulations. In the future, personalized minimal residual disease–driven treatment strategies following ASCT will help overcome the residual disease, restore multiple myeloma–specific immunity, and achieve sustained disease control while minimizing the risk of overtreatment.

Minimal Residual Disease Studies in Multiple Myeloma Patients Achieving Complete Remission after Autologous Peripheral Blood Stem Cell Transplantation (APBSCT) by RQ-PCR.

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 2418-2418 ◽  
Author(s):  
M. E. Sarasquete ◽  
R. García-Sanz ◽  
A. Balanzategui ◽  
P. Martínez-Sánchez ◽  
J. Martínez-López ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Minimal Residual Disease ◽  
Residual Disease ◽  
Progression Free Survival ◽  
High Rate ◽  
Taqman Probe ◽  
Patient Specific ◽  
Standard Curve ◽  
The Impact ◽  
Minimal Residual

Abstract Multiple myeloma (MM) remains as an incurable disease although new therapies can achieve a high rate of complete remissions (CR). Unfortunately, most patients ultimately relapse due to the persistence of minimal residual disease (MRD), and only a minority could be cured. Detection and quantification of these cells is an important tool for monitoring these patients and predicting a potential relapse. Here we analyze by RQ-PCR the MRD in MM patients achieving CR in order to classify them into different risk categories. MATERIAL AND METHODS: 38 MM patients uniformly treated according to the GEM-2000 (Spanish group for Myeloma) protocol, and that have achieved CR following PBSCT were included in the study. 22 were IgG, 9 IgA, 6 B-J and 1 non-secretory (κ/λ 21/16). 27 were male & 11 female with a median age of 58 (range 48–65). Bone marrow samples obtained at diagnosis and 3 months after transplant were analyzed. Complete (VDJH) and incomplete (DJH) Ig rearrangements were amplified with the Biomed-2 strategy (Leukemia2003;17:2257). PCR clonal products were sequenced on an ABI Prism 377 Sequence detector. VH, DH and JH segments were identified by comparing with germinal sequences on V-Base and BLAST databases. An ASO primer at the N-region was designed for each patient with the OLIGO 6.0 software. RQ-PCR was then performed on an ABI Prism 7700 using the ASO specific forward primer, a JH reverse intronic primer (JH1–6) and a TaqMan probe (JH1,2,4,5, JH3 or JH6) to amplify the patient specific rearrangement. Sample quality and quantity was controlled evaluating the standard curve of the albumin gene amplification. MRD was calculated according to ΔCT method. RESULTS: In 14 out of the cases included in the study, MRD investigation was not possible because the N-region was not longer enough to design the ASO primer (n=3), poor quality in the diagnostic sample to obtain the standard curve (n=8) or low plasma cell infiltration at diagnosis to obtain correct dilutions (n=3). The remaining 24 patients were classified into different risk groups according to the MRD level obtained 3 months after transplantation with a cut-off point of 0.01% tumor cells. Thus, progression free survival (PFS) was longer in those patients with MRD< 10−4 (p=0.03, figure 1A). By contrast, upon comparing the impact on PFS of immofixation (IFX) in these 24 patients that were in CR (defined by conventional electrophoresis criteria), it was observed that patients with IFX (−) didn’t showed a different outcome from those IFX (+) (figure 1B). CONCLUSION: In summary, although RQ-PCR is a labor and time-consuming technique, it is an useful tool for monitoring MRD in MM. The level of 10−4 can contribute to classify patients into 2 groups (high and low MRD) with different risk of relapse that can be used to design specific therapies.

Early lymphocyte recovery (ELR) impact on disease outcome following autologous hematopoietic stem cell transplantation (HDT/ASCT) for multiple myeloma (MM) in the era of novel agents.

2013 ◽  
Vol 31 (15_suppl) ◽  
pp. e19539-e19539
Author(s):  
Jeremy Scott McDuffie ◽  
Bipin N. Savani ◽  
Wichai Chinratanalab ◽  
Stacey Goodman ◽  
John P. Greer ◽  
...  
Keyword(s):  
Minimal Residual Disease ◽  
Residual Disease ◽  
Disease Status ◽  
Novel Agents ◽  
Disease Outcome ◽  
Disease Stage ◽  
Response Criteria ◽  
Hematopoietic Stem ◽  
Significant Difference ◽  
Minimal Residual

e19539 Background: Absolute lymphocyte count (ALC) > 500 cells/ µL on day 15 (ELR+) after HDT/ASCT, has been reported to be an independent prognostic indicator, for improved OS and PFS in patients with MM. Novel agents (immunomodulatory drugs (IMiDs) and proteasome inhibitors), mediate there effect through T-cell stimulation, NK cell activation, anti-proliferation, and are now main stay of therapy for MM. We sought to determine their effects on ELR, and correlated to disease outcome. Methods: A retrospective review of all MM patients seen at our institution undergoing HDT/ASCT from January 2008 to December 2012 was performed. Patients were identified from our CIBMTR database. ALC was determined pre-HDT/ASCT (T1), on day15 (T2) and d30 (T3) post-HDC/ASCT. No restrictions on inclusion were made based upon the International Myeloma Working Group response criteria. All had novel agents as part of their initial induction regimen. Disease response was determined by standard clinical and laboratory CIBMTR response criteria, and minimal residual disease status (MRD) by multiparameter flow cytometry. Results: In our study (n= 184), 52/184 patients had ELR+ while 132/184 had ALC < 500 cells/mL (ELR-) at T2. 21% received IMiDs, 33% proteasome inhibitor and 46% combination therapies. 52% of the ELR+ patients were MRD negative (-) at T1, and improved to 74% and 89% at D100, and 1 year post-HDC/ASCT respectively. Similarly 63%, 70%, and 80% of the ELR- patients, were MRD (-) at similar time-points. Chi squared analysis showed no significant difference in rates of MRD (-) based on ELR. ELR also had no impact on disease status as determined by CIBMTR response criteria, or 1 year PFS and OS (p = 0.383), (p = 0.577) respectively. Multivariate analyses, using cox-regression showed no impact of ALC at T1, T2, T3, age, sex, race, cytogenetic risk, or disease stage on disease outcome. Conclusions: Novel agents improve disease control independent of ELR following HDC/ASCT. Understanding their biologic effect on immune-reconstitution will provide a platform for adoptive immunotherapy to better target minimal residual disease.

scholarly journals Detection of Minimal Residual Disease by Flow Cytometry for Patients with Multiple Myeloma Submitted to Autologous Hematopoietic Stem Cell Transplantation

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Suzane Dal Bó ◽  
Annelise Pezzi ◽  
Bruna Amorin ◽  
Vanessa Valim ◽  
Rosane Isabel Bittencourt ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Flow Cytometry ◽  
Stem Cell ◽  
Hematopoietic Stem Cell Transplantation ◽  
Stem Cell Transplantation ◽  
Minimal Residual Disease ◽  
Cell Transplantation ◽  
Residual Disease ◽  
Hematopoietic Stem ◽  
Minimal Residual

The treatment strategy in multiple myeloma (MM) is to get complete remission followed by high-dose chemotherapy and autologous Hematopoietic Stem Cell Transplantation (HSCT). Neoplastic Plasma Cells (NPCs) are CD45-/dim, CD38+high, CD138+, CD19−, and  CD56+high in most cases. The description of this immunophenotype is of major importance as it leads to the correct identification of minimal residual disease (MRD). Samples from 44 Patients were analyzed prospectively in this study. We analyzed if the presence of MRD at three months after HSCT was predictive of relapse or death. There were 40 evaluable patients of whom 16/40 patients had MRD at three moths after HSCT and there were none in cytological relapse. The mean overall survival (OS) was 34 months and disease-free survival (RFS) was 28 months after HSCT. There was no significant difference in the log rank analysis comparing OS and the presence of MRD (P=0,611) and RFS (P=0,3106). Here, we demonstrate that three color flow cytometry (FCM) is more sensitive for MDR evaluation than cytological analyzes. However, based in our data we can not affirm that MRD is a good predictor of MM relapse or death. In conclusion, our results could be attributed to a short followup, small sample size, and over most to the inability of a three-color FCM to detect the NPC population.

scholarly journals Evaluation of Hematopoietic Stem Cell Product As a New Site for Minimal Residual Disease By Next Generation Flow in Multiple Myeloma

Blood ◽  
2021 ◽  
Vol 138 (Supplement 1) ◽  
pp. 4927-4927
Author(s):  
Herbert Henrique de Melo Santos ◽  
Glaciano Ribeiro ◽  
Allan de souza Santos ◽  
Marcos Chaves ◽  
Joanna Leal ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Bone Marrow ◽  
Stem Cell ◽  
Minimal Residual Disease ◽  
Hematopoietic Stem Cell ◽  
Plasma Cell ◽  
Residual Disease ◽  
Next Generation ◽  
Hematopoietic Stem ◽  
Minimal Residual

Abstract Introduction- Next generation flow (NGF) is one of the approaches for testing multiple myeloma (MM) minimal residual disease (MRD) over conventional response assessments. Actually, bone marrow (BM) is the preference site of evaluation because of its sensitivity. Because of its invasively technic, other possible sites for MRD evaluation outside the BM have been studied. In the present study we analyzed the MRD between the BM and the hematopoietic stem cell collected product (HSC product), once the concentration of plasma cell in the HSC product could be higher than peripheric blood sample. Aims- To compare MRD quantification of plasma cell between BM and HSC product after induction from Newly Diagnosed MM(NDMM) Transplant Eligible (TE) patients (pts) exposed to daratumumab, cyclophosphamide, thalidomide and dexamethasone (Dara-CTD) protocol. Methods- The SC product and BM samples were collected after four 28 days cycles of induction therapy from pts treated with Dara-CTd protocol described before by (Crusoe E. et al. Blood 2020; 136 (supplement 1): 17-18). MRD was evaluated by next-generation flow (NGF) based in the EuroFlow® protocol. EuroFlow standards was used to identify clonality and aberrant PC immune phenotype, consisting by EuroFlow 8-color 2-tube method (MM MRD kit, Cytognos, Salamanca), with the acquisition of 5 million events each tube and then merged into a single analysis tube on approximately 10 million events. Plasma cells were identified by CD38 multiepitope and CD138. Other markers were used to detect abnormal phenotypes. For comparison of MRD results, Bland-Altman plot comparing BM-MRD and HSC product-MRD was performed. Results- The first pts was enrolled in November 2018. A total of 24 pts were included, the median age was 60 (range 37- 67 years), 23 (92%) were non-white, 5 (21%) had an R-ISS = 1, 12 (54%) had an R-ISS = 2 and 4 (16%), an R-ISS = 3. Six (25%) pts had high-risk chromosomal abnormalities [del17p, t(4;14) or t(14;16)]. To date, all pts have completed induction and 20 have received transplant. Regarding response rates, after the end of induction (cycle 4), 19 (90%) of the pts obtained &gt; PR and 8 (38%) obtained &gt;VGPR, including three MRD negativity by NGF. 19 pts were analyzed for MRD. Negative MRD in sensitivity &lt;10 -5, &gt;=10 -5 and &lt;10 -4, &gt;=10 -4 evaluated in bone marrow was 4/19(21%), 4/19(21%), 11/19(58%) respectively. Negative MRD in sensitivity &lt;10 -5, &gt;=10 -5 and &lt;10 -4, &gt;=10 -4 evaluated in the HSC product was 13/19(68%), 3/19(16%), 3/19(16%) respectively. Median bone marrow sensitivity 10 -4 lower quartile 10 -5 upper quartile 10 -3. Normal distribution of the differences between BM and SC product MRD was first assessed (Kolmogorov-Smirnov's p &lt; 0.001, n = 19). Discussion-Conclusions- The use of HSC product could enhance the plasma cell concentration and may be an alternative and attractive method for MRD detection that diminished the invasiveness of repetitive bone marrow aspirations and tackling the heterogeneity distribution of MM cells. In this preliminary data the sample size did not allow to show a direct correlation between BM and HCS product. A larger sample would be needed to confirm the hypothesis. Figure 1 Figure 1. Disclosures Hungria: Amgen, BMS, Celgene, Janssen: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Support for attending meetings/travel ; Abbvie: Honoraria; Sanofi: Honoraria, Other: Support for attending meetings/travel ; Takeda: Honoraria. De Queiroz Crusoe: Janssen: Research Funding.

scholarly journals Multiple myeloma: Maintenance therapy after autologous hematopoietic stem cell transplantation, depending on minimal residual disease

2017 ◽  
Vol 89 (7) ◽  
pp. 25-31
Author(s):  
M V Solovyev ◽  
L P Mendeleeva ◽  
O S Pokrovskaya ◽  
M V Nareyko ◽  
M V Firsova ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Stem Cell ◽  
Maintenance Therapy ◽  
Minimal Residual Disease ◽  
Hematopoietic Stem Cell ◽  
Residual Disease ◽  
Color Flow ◽  
Hematopoietic Stem ◽  
Minimal Residual ◽  
Risk Of Relapse

Aim. To determine the efficiency of maintenance therapy with bortezomib in patients with multiple myeloma (MM) who have achieved complete remission (CR) after autologous hematopoietic stem cell (auto-HSCT), depending on the presence of minimal residual disease (MRD). Subjects and methods. In January 2014 to February 2016, fifty-two MM patients (19 men and 33 women) aged 24 to 66 years (median 54 years), who had achieved CR after auto-HSCT, were randomized to perform maintenance therapy with bortezomib during a year. On day 100 after auto-HSCT, all the patients underwent immunophenotyping of bone marrow plasma cells by 6-color flow cytometry to detect MRD. Relapse-free survival (RFS) was chosen as a criterion for evaluating the efficiency of maintenance therapy. Results. After auto-HSCT, MRD-negative patients had a statistically significantly higher 2-year RFS rate than MRD-positive patients: 52.9% (95% confidence interval (CI), 35.5 to 70.5%) versus 37.2% (95% CI, 25.4 to 49.3%) (p=0.05). The presence of MRD statistically significantly increased the risk of relapse (odds ratio 1.7; 95% CI, 1.2 to 3.4; p=0.05). Two-year cumulative risk of relapse (using the Kaplan-Meier) after auto-HSCT did not statistically significantly differ in MRD-negative patients receiving (n=15) and not receiving (n=10) maintenance therapy with bortezomib (p=0.58). After completion of maintenance treatment, 42% of the MRD-positive patients achieved a negative status. In the MRD-positive patients who had received maintenance therapy, the average time to recurrence was 5 months longer than that in the naïve patients: 17.3 versus 12.3 months. Conclusion. The MRD status determined in MM patients who have achieved CR after auto-HSCT is an important factor for deciding on the use of maintenance therapy.

Qualitative and Quantitative Molecular Follow up of Minimal Residual Disease after Non Myeloablative Allografting for Multiple Myeloma.

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 5128-5128 ◽  
Author(s):  
B. Bruno ◽  
M. Ladetto ◽  
M. Astolfi ◽  
L. Veneziano ◽  
L. Cimolin ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Minimal Residual Disease ◽  
Nested Pcr ◽  
Genomic Dna ◽  
Residual Disease ◽  
Patient Specific ◽  
Molecular Remission ◽  
Post Transplant ◽  
Minimal Residual

Abstract New allogeneic transplant protocols with non myeloablative conditioning regimens for treatment of multiple myeloma (MM) have been developed in the attempt to reduce the transplant related toxicity associated with myeloablation. Preliminary data have been encouraging with remarkable clinical response rates (Maloney et al, Blood 2003). However, data on the achievement of molecular remission, prerequisite for eventual cure, are still lacking. We implemented a tandem transplant approach consisting of high dose melphalan (200 mg/sqm) with autografting followed by non myeloablative low dose (2.0 Gy) total body irradiation and G-CSF mobilized PBSC infusion from HLA-identical siblings. The curative potential relies exclusively upon a potent graft versus myeloma (GVM) effect through donor T cells. At diagnosis, patient specific clonal markers were generated based upon the rearrangement of the immunoglobulin heavy chain (IgH) genes and used for nested polymerase chain reaction (PCR) detection of minimal residual disease after transplant. Molecular remission was defined as the disappearance of the molecular marker post transplant in both bone marrow and blood. The sensitivity of the nested PCR-based assay was 1 in 100000 cells. A patient specific marker was generated in 11/15 (73%) patients who entered the study. After a median follow up of 16 months (range 5–50), molecular follow up post transplant showed that 3/11 (27%) reached molecular remission at 1, 3 and 7 months post allografting, respectively. Of the remaining 8 patients, 3/8 and 5/8 reached clinical complete remission, defined as the disappearance of the monoclonal paraprotein by immunofixation, and partial remission, respectively. However, minimal residual disease by nested PCR could be detected at all timepoints. The molecular remissions have been durable at 7, 30, and 48 months post transplant, respectively. In 1 case the remission was achieved and sustained in the absence of graft versus host disease (GVHD) which is consistent with the notion that GVHD is not essential for GVM. Furthermore, in 4/11 patients real-time quantification of IgH rearrangements was performed on genomic DNA samples using tumor specific primers and consensus probes. All patients showed a considerable tumor burden reduction post autografting. Samples from two patients became negative by real time PCR at 3 months post allografting, but became PCR-negative by nested PCR at 3 and 7 months, respectively. This discrepancy is explained by the greater sensitivity of nested PCR and the larger amount of IgH copies which are expected in cDNA compared to genomic DNA. The remaining two patients only obtained a clinical partial response throughout the study period. This report indicates that the tandem auto-allo transplant approach can lead to molecular remission in MM. Prospective quantitative monitoring of disease response may be helpful to design individual additional immunotherapeutic manoeuvres, such as donor lymphocyte infusions, to enhance GVM. Longer follow up on a larger series of patients is needed to determine the frequency and durability of molecular remissions.

Impact of Minimal Residual Disease (MRD) on Prognosis in Children with Philadelphia Positive Acute Lymphoblastic Leukemia (ALL) Treated in the AIEOP-BFM ALL 2000 Study.

Blood ◽  
2008 ◽  
Vol 112 (11) ◽  
pp. 1511-1511
Author(s):  
Andrea Biondi ◽  
André Schrauder ◽  
Maria Grazia Valsecchi ◽  
Claus R Bartram ◽  
Georg Mann ◽  
...  
Keyword(s):  
High Risk ◽  
Minimal Residual Disease ◽  
Residual Disease ◽  
Lymphoblastic Leukemia ◽  
Patient Specific ◽  
Poor Responders ◽  
Induction Phase ◽  
Hematopoietic Stem ◽  
Group I ◽  
Minimal Residual

Abstract Introduction: The International “Berlin-Frankfurt-Münster” Study Group (I-BFM-SG) pioneered the evaluation of minimal residual disease (MRD) based on Immunoglobulin and T-cell Receptor gene rearrangements as PCR targets. The prospective AIEOP (Associazione Italiana Ematologia Oncologia Pediatrica)-BFM ALL 2000 study is the largest in which standardized quantitative assessment of PCR-MRD at two time points (TP) was used for stratification in 127 centers. Objective: To assess whether PCR-MRD levels discriminate outcome in patients with childhood Philadelphia positive (Ph+) ALL treated with intensive chemotherapy. Material and Methods: Between 07–2000 and 07–2006, 79 Ph+ patients were enrolled in the AIEOP-BFM ALL 2000 study. They were eligible for the high risk (HR) treatment arm and treated with Induction (protocol IA + IB), poly-chemotherapy blocks, reinduction (by one or more Protocols II or III), followed by maintenance therapy. BM samples obtained at day 33 (Time Point 1, TP1) and 78 (TP2) of induction therapy were used for MRD analysis by patient specific PCR targets. At least one or two sensitive markers (≥ 1 × 10−4) could be determined in 62 (78.5%) and 54 (68.4%) patients, respectively. MRD-Standard Risk (SR) was defined by MRD-negative at both TP1 and TP2; MRD-HR by MRD ≥1×10−3 at TP2; MRD-Intermediate Risk (IR): all others. Median follow-up was 3 years; 5-year survival and event-free survival (EFS) (SE) estimates are given. Results: Out of 79 registered patients, 3 (3.7%) died during Induction phase, 15 (19.2%) were Prednisone-poor responders (PPR), 12 (19.2%) were resistant to phase IA and 75 (94.9%) achieved CR. Forty-six patients (58.2%) underwent hematopoietic stem cell transplantation (HSCT). Overall, EFS and Survival (SE) were 44.3%(6.5) and 61.5%(6.2), respectively. Sixty-two patients were stratified by MRD (i.e. they were alive and valuable at day 78 and had at least one sensitive PCR marker). Eleven patients (17.7%) were at MRD-SR: 8 remained in CCR (4 after BMT), 1 died in CCR and 2 relapsed at 2.7 and 5.7 years from diagnosis; 28 (45.2%) were at MRD-IR: 18 remained in CCR (14 after BMT), 1 died in CCR and two for TRM after HSCT; 7 relapsed after 0.6 to 5.1 years; 23 (37.1%) were at MRD-HR and only 4 remained in CCR (all after BMT). The relapse rate was 18% in MRD-SR, 25% in MRD-IR and 61% in MRD-HR. Of note, within the Prednisone good-response subgroup (n=61), the evaluation of MRD identified those patients (MRD-HR, n=12 out of 51 PGR, MRD stratifiable) at very high risk of relapse (6/12: 50%). Conclusions: PCR-MRD is a strong predictor for outcome in Ph+ ALL patients treated with BFM therapy. MRD response detected by PCR can tailor the selection of the best treatment (Imatinib or other tyrosine kinase inhibitors and chemotherapy with or without transplant). The prognosis in the subgroup of Ph+ALL as defined HR according to PCR-MRD detection is still very poor even after HSCT and accordingly new therapeutic strategies are needed.

scholarly journals Personalized immunoglobulin aptamers for detection of multiple myeloma minimal residual disease in serum

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Claudia Tapia-Alveal ◽  
Timothy R. Olsen ◽  
Tilla S. Worgall
Keyword(s):  
Multiple Myeloma ◽  
Minimal Residual Disease ◽  
Plasma Cells ◽  
Residual Disease ◽  
Early Recognition ◽  
Point Of Care ◽  
Detection Methods ◽  
Patient Specific ◽  
Multiparameter Flow Cytometry ◽  
Minimal Residual

AbstractMultiple myeloma (MM) is a neoplasm of plasma cells that secrete patient specific monoclonal immunoglobulins. A recognized problem in MM treatment is the early recognition of minimal residual disease (MRD), the major cause of relapse. Current MRD detection methods (multiparameter flow cytometry and next generation sequencing) are based on the analysis of bone marrow plasma cells. Both methods cannot detect extramedullary disease and are unsuitable for serial measurements. We describe the methodology to generate high affinity DNA aptamers that are specific to a patient’s monoclonal Fab region. Such aptamers are 2000-fold more sensitive than immunofixation electrophoresis and enabled detection and quantification of MRD in serum when conventional MRD methods assessed complete remission. The aptamer isolation process that requires small volumes of serum is automatable, and Fab specific aptamers are adaptable to multiple diagnostic formats including point-of-care devices.

Prognostic Value of Sequencing-Based Minimal Residual Disease Detection in Multiple Myeloma

Blood ◽  
2014 ◽  
Vol 124 (21) ◽  
pp. 2003-2003 ◽  
Author(s):  
Hiroyuki Takamatsu ◽  
Ryoichi Murata ◽  
Jianbiao Zheng ◽  
Martin Moorhead ◽  
Naoki Takezako ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Minimal Residual Disease ◽  
Prognostic Value ◽  
Residual Disease ◽  
Sensitive Detection ◽  
Novel Agents ◽  
Immunoglobulin Gene ◽  
Group 2 ◽  
Minimal Residual ◽  
Group 1

Abstract Background: Although molecular complete remission (mCR) in multiple myeloma (MM) can be assessed by allele-specific oligonucleotide (ASO)-PCR, this technique requires preparation of clonotype-specific primers for each individual, which is laborious and time-consuming. We utilized the LymphoSIGHTTM platform, which employs consensus primers and next-generation sequencing (NGS) to amplify and sequence all rearranged immunoglobulin gene segments present in a myeloma clone, to assess mCR. This technique has been shown to have 1-2 logs greater sensitivity compared to ASO-PCR and flow cytometry, respectively (Faham et al, Blood 2012). Usage of the sequencing method for minimal residual disease (MRD) detection in MM may provide increased sensitivity and specificity, while overcoming the challenges associated with ASO-PCR. We compared the LymphoSIGHTTM method with ASO-qPCR for MRD detection in autografts and bone marrow (BM) in the autologous peripheral blood stem cell (PBSC) transplantation (ASCT) setting. Methods: One hundred and nine Japanese patients with newly diagnosed MM who received various induction regimens prior to ASCT were retrospectively analyzed. All patients had achieved a partial response (PR) or better after ASCT. BM slides from 84 MM patients and fresh/frozen BM cells from 25 MM patients at diagnosis, as well as autografts/post-ASCT BM cells from each patient, were obtained for DNA extraction. IGH-based ASO-qPCR was performed as described previously (Methods Mol Biol 2009). Using universal primer sets, we amplified IGH variable (V), diversity (D), and joining (J) gene segments, IGH-DJ, and IGK from genomic DNA. Amplified products were subjected to deep sequencing using NGS. Reads were analyzed using standardized algorithms for clonotype determination. Myeloma-specific clonotypes were identified for each patient based on their high frequency in BM samples. Results : Myeloma clonotypes could be identified in autografts/post-ASCT BM cells in 98 of 109 patients (90%) and by ASO-qPCR in 63 of 101 patients (62%). MRD by NGS was assessed in autografts of 89 patients. 70 of 89 patients (79%) were positive by NGS; 28 of 62 patients (45%) were positive by ASO-qPCR. Although we observed a high correlation between NGS and PCR MRD results at MRD levels of 10-5 or higher, the sensitivity of ASO-PCR was 10-4-10-5, whereas that of NGS was 10-6 or lower when a sufficient amount of DNA was available for analysis. Eight cases where MRD was not detected in the autograft by NGS (MRDNGS(-)) and 38 MRDNGS(+) cases received post-ASCT therapy using novel agents such as bortezomib/lenalidomide/thalidomide, while 11 MRDNGS(-) cases and 32 MRDNGS(+) cases were followed without post-ASCT therapy. The MRDNGS(-) cases without post-ASCT therapy showed significantly better progression-free survival (PFS) than the MRDNGS(+) cases without post-ASCT therapy (P = 0.012) (Figure 1A) although overall survival rates were comparable between these groups. To investigate the value of sensitive detection by NGS, we compared PFS in 11 MRDNGS(-) cases (Group 1) with the 12 MRDNGS(+) cases where MRD was not detected by ASO-qPCR (MRDASO(-)) (Group 2). The patients in both groups did not receive any post-ASCT therapy. Group 1 showed significantly better PFS than Group 2 (P = 0.027) (Figure 1B). Furthermore, 9 MRDNGS(-) in post-ASCT BM cases tended to show a better PFS than 18 MRDNGS(+) in post-ASCT BM cases (P = 0.075) (Figure 1C). In a multivariate analysis, post-ASCT therapy using novel agents (P <0.001) and MRDNGS(-) in autograft (P=0.025) were independently associated with superior PFS while ISS I/II vs III (P = 0.387) and MRDASO(-) in autograft (P=0.174) were not. Conclusions: In this study, we showed the prognostic value of MRD detection using the NGS-based LymphoSIGHT platform in autografts of patients with MM who received and in those who did not receive post-ASCT therapy with novel agents. The NGS platform has improved sensitivity compared with ASO-qPCR in detecting MRD in autografts. Patients with low level MRD detected by NGS but not by ASO-qPCR have worse prognosis compared to patients who are MRD negative by sequencing, which underscores the need for sensitive detection. Figure 1 Figure 1. Disclosures Zheng: Sequenta, Inc.: Employment. Moorhead:Sequenta, Inc.: Employment. Faham:Sequenta, Inc.: Employment, Equity Ownership, Membership on an entity's Board of Directors or advisory committees.

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