Preliminary Results Of A Mass Spectrometry Based Bottom Up Proteomic Approach On Bone Marrow Plasma Cells From Patients With Multiple Myeloma (MM)

Abstract Aim The molecular mechanisms responsible from evolution to malignant monoclonal plasmacytosis is still under investigation. The aim of this prospective study was to analyze the proteomics profile of plasma cells obtained from MGUS, SMM and symptomatic myeloma patients to be able to investigate the differences at protein level between patients with low vs high plasma cell content (PCC). Material and Methods Marrow samples were collected from 30 patients newly diagnosed with Multiple Myeloma (n: 28 symptomatic and n: 1 smoldering (SMM)) and n:1 MGUS) at Ankara University Department of Hematology. Plasma cells were isolated by CD138+ selection before protein extraction. The patients were classified mainly in to three groups according to marrow PCC by flow cytometry: group1: 0-9, group 2: 10-20 and group 3: >20 %. The protein profiles of these three groups were constructed and compared via 2D gel electrophoresis by using PDQuest 8.01 analysis. Up/down regulated protein spots were identified with Matrix-assisted laser desorption/ionization mass spectroscopy(MALDI) by Peptide Mass Fingerprinting (PMF) analysis Results All protein spots that were detected according to PCC with PDQuest analysis are as follows: 135 spots in group 1 142 spots in group 2 and 145 spots in group 3 Among these spots, 27 spots with significant expression density difference (at least 2-fold) were detected between group 1 and 2, 36 spots between group 1 and group 3 and 28 spots between group 2 and group 3. 36 of these protein spots were were used in peptide isolation by using trypsin. PMF analyses were carried out in MALDI-TOF mass spectrometer. From these spots, eight proteins were identified by using Mascot: Endoplasmin (ERp99), Calreticulin(ERp60), MZB1(Marginal zone B and B1 cell specific protein/pERp1), Actin cytoplasmic1(ACTB), Myeloblastin (Leukocyte proteinase 3), Thioredoxin domain-containing protein 5 (TXNDC5/ERp46), Apoptosis regulator B-cell lymphoma 2 (Bcl-2) and Peroxiredoxin-4 ( Table 1, Figure 1). The remaining 28 spots are under investigation. In group 3 the density of protein spots which contain Calreticulin, MZB1, Myeloblastin and TXCDN5 increased, and which contain Actin and Endoplasmin decreased significantly (Table 1). There was a negative corelation between the Peroxiredoxin expression level and the PCC which resulted in disappearance as the percentage of PCC increased. Moreover, not only Peroxiredoxin, but also BCL-2 protein was detected only in the group with PCC >20 %. To avoid the changes that can be attributable to PC counts equal amounts of protein were analyzed from each group. Conclusion Until now there is only one published study utilizing proteomics in MM and reports 268 proteins (Chun Hua Lu et al, J Proteomics Informatics 2010). Ours is the first proteomics study comparing plasma cell proteins with PCC. The functional properties of these proteins are summarized (Table 2). High protein production and folding plus Ca changes in MM support our findings on chaperons and Ca binding protein changes. Out of these eight proteins only bcl-2, MZB1 and calreticulin were previously reported to be involved in the biology of MM. Disclosures: Beksac: Janssen: Honoraria, Membership on an entity’s Board of Directors or advisory committees; Celgene: Honoraria, Membership on an entity’s Board of Directors or advisory committees; Novartis: Honoraria, Membership on an entity’s Board of Directors or advisory committees.

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First Results of a Prospective Study on Erythropoietin Biosimilar (Epoetin zeta) Use in Patients Undergoing Allogeneic Hematopoietic Stem Cell Transplantation for Hematological Malignancies

Blood ◽

10.1182/blood.v126.23.4477.4477 ◽

2015 ◽

Vol 126 (23) ◽

pp. 4477-4477

Author(s):

Mauricette Michallet ◽

Mohamad Sobh ◽

Jeremy Monfray ◽

Hélène Labussière-wallet ◽

Marie Balsat ◽

...

Keyword(s):

Board Of Directors ◽

Hematological Malignancies ◽

Control Group ◽

Advisory Committees ◽

Hematopoietic Stem ◽

Epoetin Beta ◽

Epoetin Zeta ◽

Group 3 ◽

Group 2 ◽

Group 1

Abstract Introduction: Anemia is the most common hematological abnormality in patients with cancer and hematological malignancies, and is associated with poor prognosis and outcomes that have a detrimental impact on the patient's condition and quality of life (QOL). Erythropoiesis-stimulating agents (ESA) represent a good treatment option in order to increase the hemoglobin level in patients with anemia. Anemia can also be treated by red blood cell transfusion, but this has a transient effect and is associated with risks such as exposure to infectious agents, iron overload, or transfusion-related acute lung injury. ESA also have safety concerns, including the established increased risk of venous thromboembolic events. However, they are currently the only therapeutic alternative to transfusions. We performed a prospective observational study in patients undergoing allogeneic hematopoietic stem cell transplantation (allo-HSCT) for hematological malignancies, with the primary objective of evaluating the effect of a new ESA biosimilar, epoetin zeta (Hospira) on patient QOL. Secondary objectives included hemoglobin (Hb) and platelet (Pt) recovery, safety, overall survival (OS) and relapse incidence. Results of this study were compared to two reference populations, one receiving epoetin beta (Roche) and one control group not treated with ESA. Here, we present preliminary results for the secondary objectives. Materials and methods: The study included adult patients with Hb level ≤11g/dl occurring after all types of allo-HSCT for any hematological disease (Table 1). Epoetin zeta (30,000 IU) was administered s.c. once per week for up to 6 months, and Hb levels were monitored weekly. Injections were stopped once the Hb level reached 12g/dl without transfusion. If after 4 injections, no improvement was observed, doses were doubled, and if after 8 injections, no improvement was observed, the patient was withdrawn from the study. The QOL was measured at baseline and at 1, 2, 3 and 6 months by the Functional Assessment of Cancer Therapy-Anemia (FACT-An) scale. Epoetin zeta responders were defined as having Hb level ≥12g/dl (complete response, CR) or a ≥2g/dl increase (partial response, PR) compared with baseline value, in the absence of transfusion. Patients receiving epoetin zeta (group 1) were compared to a similar population receiving epoetin beta with the same procedures (group 2) and to a matched population not treated with ESA (group 3), taking into account the following variables: sex, age, diagnosis, disease status at allo-HSCT, conditioning regimen and HSC source. Results: Between December 2011 and September 2014, 58 patients (from 168 screened) were included in group 1, and compared to 59 patients in group 2 and 65 patients in group 3. The main exclusion criteria were ESA contra-indication and patient refusal. Patients in group 1 had lower Hb baseline levels compared to group 2; patient characteristics for each group are summarized in Table 1. The median number of injections/patient was 10 (range: 6-14) in group 1 and 8 (range: 2-28) in group 2. The cumulative incidence of CR was 80% in group 1 and 71% in group 2. The median time to achieve CR was 48 days (range: 35-70) in group 1, and 39 days (range: 14-180) in group 2. Eight patients withdrew due to ESA inefficacy in group 1 and 8 in group 2. Adverse events were all thromboembolic: 2 events in group 1 and 5 events in group 2, compared to 2 events in group 3 (p=0.34). The multivariate analysis studying different confounding factors on the cumulative incidence of CR showed a significant positive impact of younger age (p=0.001), and a negative impact of being female or having major ABO incompatibility. We did not find any significant difference in terms of OS and relapse rate between the 3 groups. Conclusion: We describe here, for the first time, preliminary data for ESA biosimilar epoetin zeta (Hospira) in allo-HSCT patients showing comparable efficacy and safety to an existing ESA, epoetin beta (Roche) with no impact on OS and relapse incidence, compared to a control group. The QOL and transfusion evaluations as well as a cost-effectiveness study are ongoing and results will be presented. Disclosures Nicolini: Bristol-Myers Squibb: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Novartis: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Ariad Pharmaceuticals: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau.

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AML-CM Score Predicts Prognosis in Hemato-Geriatric Patients with New-Onset Acute Myeloid Leukemia (AML) Who Receive Hypomethylating Agents (HMA)

Blood ◽

10.1182/blood-2019-130630 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 2617-2617

Author(s):

Giovanni Marconi ◽

Roberta di Nicola ◽

Chiara Sartor ◽

Mariachiara Abbenante ◽

Jacopo Nanni ◽

...

Keyword(s):

Adverse Events ◽

Board Of Directors ◽

Advisory Committees ◽

Group 4 ◽

Group A ◽

Group 3 ◽

Group 2 ◽

Group B ◽

Idh2 Mutation ◽

Group 1

Background Although much efforts have been made to precisely define fitness of AML patients, in patients who are not candidate to chemotherapy, there is no prognostic model and the respective weight of AML biology and patient fitness are not well established. Here we test AML-CM score (Sorror, JAMA 2018), that is validated in fit population, in a set of old AML patients who received HMAs. Methods We retrospectively collected data of consecutive patients who received HMAs in our institution from 1st Jan 2008 with an age > 65 years at AML diagnosis. AML-CM score was applied to all the patients. Patients were divided in 4 groups (score 1-4: group 1, score 5-6: group 2; score 7-9: group 3, score > 9: group 4) and in 2 macro-groups (score 1-6: group A and score > 6 group B) for the analyses. Descriptive data are presented as median with interquartile ranges (IQR). Adverse events are graded according to CTCAE v4.03. Survival analysis was conducted with Kaplan-Meyer and are presented as 95% confidence intervals (C.I.) and differences in overall survival (OS) were tested with 2-side log rank test. Fisher exact test and Person's chi squared test were used whenever appropriate. Results At data cut-off, 1st Jan 2019, 60 consecutive patients received decitabine or azacytidine as 1st line therapy for AML. Median age of the population was 75.94 years (IQR 72.53-80.38). Most of the patients (37/62, 59.7%) had de novo AML, 19/62 (30.6%) had AML secondary to previous myeloid disorders and 6/62 (9.7%) had AML secondary to chemotherapy or radiotherapy. Most of the patients were smokers (19/33, 57.57%, 29 no data), and few were usual drinkers (4/16, 25.00%, 46 no data). In our set, out of 62 patients, 2 patients (3.2%) had inv(3), 1 (1.6%) a translocation involving 11q23, 1 (1.6%) del(5q), 4 (6.4%) mon(7) or del (7q), 1 (1.6%) del(17p), 15 (24.2%) complex karyotype, 27 (43.5%) normal karyotype, 4 (6.5%) other alterations and 5 were not evaluable; 3/17 (17.65%, 45 no data) harbored IDH2 mutation, 1/16 (6.25%) IDH2 mutation, 2/33 FLT3 mutation (6.06%, 29 no data), 1/24 (4.17%, 38 no data), 2/15 (13.33%, 47 no data) TP53 mutation. According to ELN 2017, 3/62 patients (4.83%) had low risk, 34/62 (54.84%) intermediate risk and 23/62 (37.10%) high risk AML. According to AML-CM score, 13/62 patients (20.97%) were in group A, 20/62 (32.36%) in group B, 21/62 (33.87%) in group C, 6/62 (9.68%) in group D, 2/62 (3.23%) were not allocated for incomplete AML-CM score. There was no difference in term of age, ELN risk, secondary AML prevalence, HMA administered, or response to HMA according to ELN criteria between group 1, 2, 3, 4 or between macro-group A and B. Cardiovascular comorbidity, diabetes mellitus, obesity, previous tumor, hypoalbuminemia, elevated LDH were prevalent in higher risk AML-CM groups (3-4) and in macro-group B. Median OS was 658 days (95% C.I. 316-1000) in group 1, 556 days (95% C.I. 463-649 in group 2, 243 days (95% C.I. 153-353) in group 3, 107 days (95% C.I. 47-167) in group 4 (p=.021, figure 1A). Furthermore, we observed a median OS of 589 days (95% C.I. 328-850) in macro-group A and 219 days (95% C.I. 96-342) in macro-group B (p=.003, figure 1B). Reduced survival was correlated with a non-statistical trend toward augmented incidence of infections and adverse events in higher risk AML-CM groups (3-4). Conclusions AML-CM is a useful indicator of prognosis in old patients that receive HMAs. Prognosis in our set is influenced by comorbidity (measured with AML-CM, a quantitative score) more than by disease biology. We identified a group of patients (macro-group A) that has median OS after HMAs outlying OS reported in literature. This brilliant result can be due to lower comorbidity. AML-CM could help in defining candidate patients for therapy intensification and care utilization or for team comorbidity management. GM and RDN equally contributed Figure 1 Disclosures Martinelli: Roche: Consultancy; Novartis: Consultancy; ARIAD: Consultancy; BMS: Consultancy; Pfizer: Consultancy. Baccarani:Novartis: Consultancy, Speakers Bureau; Incyte: Consultancy, Speakers Bureau; Takeda: Consultancy. Papayannidis:Pfizer: Honoraria; Teva: Honoraria; Shire: Honoraria; Novartis: Honoraria; Amgen: Honoraria; Incyte: Honoraria. Cavo:janssen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: travel accommodations, Speakers Bureau; bms: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; sanofi: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; celgene: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: travel accommodations, Speakers Bureau; AbbVie: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; novartis: Honoraria; takeda: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; amgen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau.

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Exploration of Survival Stratification of Patients with Multiple Myeloma after First Relapse Using Real World Data

Blood ◽

10.1182/blood.v128.22.2417.2417 ◽

2016 ◽

Vol 128 (22) ◽

pp. 2417-2417 ◽

Cited By ~ 1

Author(s):

Roman Hájek ◽

Jiri Jarkovsky ◽

Walter Bouwmeester ◽

Maarten Treur ◽

Lucy DeCosta ◽

...

Keyword(s):

Multiple Myeloma ◽

Board Of Directors ◽

Research Funding ◽

Treatment Decision ◽

Advisory Committees ◽

Patient Risk ◽

First Relapse ◽

Survival Expectations ◽

Group 2 ◽

Group 1

Abstract Risk stratification tools in multiple myeloma (MM), such as the International Staging System (ISS) and the revised-ISS (R-ISS), have improved understanding of survival expectations using the strongest known predictors at time of diagnosis. Given their value at diagnosis, these have been used to define risk after first relapse in clinical trials and standard practice. Although these tools have not been validated in this setting, their use arises because of the need to better characterize patients in order to define survival expectations and treatment decisions. Once the patient has relapsed, there are additional variables that may need to be considered in order to systematically assess patient risk, understand drivers of disease progression and ensure that treatment strategies are aligned with patient risk. Using data from the Czech Registry of Monoclonal Gammopathies (RMG), this study assessed predictors of overall survival (OS) and developed a new Risk Stratification Tool (RST) to predict OS at time of treatment decision after first relapse (TTD1). The RST was developed by estimating the strongest predictors of OS at both diagnosis and TTD1 to define the final parameters for inclusion. The cut-offs for each parameter reflect conventional cut-offs used in clinical practice and some were supported by evidence using a K-adaptive Partitioning for Survival (KAPS) approach, which stratified data based on distinct survival expectations. The hazard ratio (HR) of the selected predictors was used to assign a score per parameter at a patient level where missing data were entered with a contribution equal to 1. Using the full RMG data set at TTD1 (N=1418) the (KAPS) method was run to define 4 distinct group of patients based on survival expectations. The RST consists of 4 dimensions and 12 item questions based on the strongest predictors of survival at TTD1, "Patient Factors" (age and Eastern Cooperative Oncology Group (ECOG) performance status), "Existing Stratification Factors (R-ISS at diagnosis and ISS at TTD1), "Disease Factors" (calcium level, number of bone lesions, extramedullary disease, thrombocyte count, clonal cells in bone marrow aspiration cytology, lactate dehydrogenase [LDH]) and "Treatment history" (refractory to prior therapy, time-to-next-treatment [from initiation of treatment of first anti-myeloma drug to initiation of treatment at first relapse]) (Table 1). Subsequently, we explored each group based on distribution of frailty-driven measures (age and ECOG) and aggressiveness of the disease (rest of parameters) to understand what is driving stratification. Figure 1 shows the KM curve of survival after TTD1 for each of the 4 groups estimated by KAPS. The new analysis shows strong differentiation in survival expectations between the 4 groups (Table 2), showing significantly different OS for all groups compared with reference. The median OS and Confidence Intervals per group did not overlap, supported by the positive association of HR across groups. The distribution of the Total Score (Figure 2) is between 1 and 2, which shows sufficient sensitivity to differentiate these groups by survival expectations. The RST can then be split into Frailty Score and Aggressiveness Score (Figure 3a & b) to understand what is driving disease severity. The distribution of these two scores shows that group 1 consists of low patient frailty and low disease aggressiveness, whereas group 4 shows high on both elements. Group 2 has an increased score for frailty and marginal increase in aggressiveness compared with group 1, and group 3 stratification is driven by an increase in aggressiveness over group 2. The analysis showed that predictors, patient's experience of prior treatment and level of disease impact at the point of treatment decision after first relapse provided an initial framework to demonstrate strong differentiation between groups based on patient severity and what is driving patient risk (patient frailty vs aggressiveness of disease). The RST has shown promising results when applied to the RMG, however further validation of this work is required using other real-world and clinical trials data. Nevertheless, this analysis is a first step in systematically assessing patient risk to improve the selection of treatments based on improved understanding of patient profiles. Disclosures Hájek: Amgen: Consultancy, Honoraria, Research Funding; Janssen: Honoraria; BMS: Honoraria; Takeda: Consultancy; Celgene: Consultancy, Research Funding. Bouwmeester:Amgen: Consultancy. Treur:Amgen: Consultancy. DeCosta:Amgen: Employment, Other: Holds Amgen Stock. Campioni:Amgen: Employment, Other: Holds Amgen Stock. Delforge:Janssen: Honoraria; Celgene: Honoraria; Amgen: Honoraria. Raab:BMS: Consultancy; Celgene: Membership on an entity's Board of Directors or advisory committees; Janssen: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Novartis: Consultancy, Research Funding; Amgen: Consultancy, Research Funding. Schoen:Amgen: Employment, Other: Holds Amgen Stock. Szabo:Amgen: Employment, Other: Holds Amgen Stock. Lucie:Amgen: Consultancy. Gonzalez-McQuire:Amgen: Employment, Other: Holds Amgen Stock.

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Oncogene Induced Senescence As a Potential Breakpoint Mechanism Against Malignant Transformation in Plasma Cell Disorders

Blood ◽

10.1182/blood.v128.22.4474.4474 ◽

2016 ◽

Vol 128 (22) ◽

pp. 4474-4474

Author(s):

Nicola Lehners ◽

Elena Ellert ◽

Jing Xu ◽

Hartmut Goldschmidt ◽

Mindaugas Andrulis ◽

...

Keyword(s):

Multiple Myeloma ◽

Board Of Directors ◽

Malignant Transformation ◽

Plasma Cell ◽

Research Funding ◽

Plasma Cells ◽

Healthy Controls ◽

Advisory Committees ◽

Expression Levels ◽

Plasma Cell Disorders

Abstract Background: Cellular senescence has been recognized as a failsafe mechanism against hyperproliferation and might thus be induced by DNA replicative stress and oncogenic signaling, commonly termed oncogene-induced senescence (OIS). OIS has been described in several premalignant conditions such as colon adenomas and melanocytic nevi, with impaired OIS capabilities found in their malignant counterparts. Here, we analyze the possible impact of cellular senescence on malignant transformation in plasma cell disorders. Methods: Bone marrow and soft tissue biopsies from 125 patients with different stages of plasma cell disorders (16 monoclonal gammopathy of undetermined significance (MGUS), 32 smoldering multiple myeloma (SMM), 56 symptomatic multiple myeloma (MM), 21 extramedullary MM) as well as from 10 healthy donors were analyzed. Expression of OIS associated proteins p16INK4A, p21Cip1/Waf1, p27Kip1, phospho-Chk2, the DNA double-strand break marker γH2AX, as well as the proliferation marker Ki67 were assessed on plasma cells by immunohistochemistry. Additionally, double staining experiments for p21 and Ki67 were performed applying immunofluorescence confocal microscopy. Levels of protein expression were compared between different disease stages using the Kruskal-Wallis test. Results: A differential expression pattern was found for p21 in various stages of plasma cell disorders with peak expression of p21 in SMM compared to both healthy controls (p<0.001) and MGUS (p=0.02), as well as compared to symptomatic multiple myeloma (MM) (p=0.007) (see Figure 1a). Median p21 expression was 0.63% of plasma cells from healthy subjects, 6.67% in MGUS, 13.81% in SMM, 2.37% in MM, and 0% in EMM. Plasma cells of SMM patients expressing p21 were negative for Ki67 consistent with a potentially senescent phenotype. In contrast, p27 was highly expressed in healthy controls, MGUS and SMM but decreased significantly in MM patients (p=0.02) (see Figure 1b). p16 showed no nuclear expression in healthy controls, MGUS or SMM and was expressed only in few patients with MM. In addition, we found low expression of p21, p27 and phospho-Chk2 in extramedullary MM compared to medullary MM samples, accompanied by increased expression of γH2AX and high levels of proliferation (Ki67 58%). Conclusions: We found indication of induction of OIS in SMM compared to symptomatic MM, mainly mediated by increased expression of p21. Further disease progression to extramedullary MM was characterized by almost complete absence of OIS markers and increased signs of DNA damage and proliferation. These observations are consistent with the hypothesis of OIS as a breakpoint mechanism against malignant transformation in plasma cell disorders and should be further explored mechanistically and as a possible therapeutic target. Figure 1 Expression levels of p21 and p27in different stages of plasma cell disorders. Semiquantitative assessment of plasma cells positive for p21 (a) and p27 (b) is shown in healthy controls, MGUS, SMM, MM, and EMM patients. Significant differences in expression levels between cohorts are indicated by their respective p-values with * p-value < 0.05, ** < 0.01, *** < 0.001. Figure 1. Expression levels of p21 and p27in different stages of plasma cell disorders. Semiquantitative assessment of plasma cells positive for p21 (a) and p27 (b) is shown in healthy controls, MGUS, SMM, MM, and EMM patients. Significant differences in expression levels between cohorts are indicated by their respective p-values with * p-value < 0.05, ** < 0.01, *** < 0.001. Disclosures Goldschmidt: Bristol-Myers Squibb: Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen: Membership on an entity's Board of Directors or advisory committees, Research Funding; Chugai: Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Celgene: Membership on an entity's Board of Directors or advisory committees, Research Funding; Novartis: Membership on an entity's Board of Directors or advisory committees, Research Funding; Millennium: Membership on an entity's Board of Directors or advisory committees, Research Funding; Onyx: Honoraria, Membership on an entity's Board of Directors or advisory committees; Takeda: Membership on an entity's Board of Directors or advisory committees; Amgen: Membership on an entity's Board of Directors or advisory committees. Raab:Novartis: Consultancy, Research Funding; Celgene: Membership on an entity's Board of Directors or advisory committees; Amgen: Consultancy, Research Funding; Janssen: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; BMS: Consultancy.

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Acute Myeloid Leukemia with Myelodisplasia-Related Changes (AML-MRC) Defined Only By Morphological Findings May Not Represent a Poor Prognosis AML

Blood ◽

10.1182/blood-2019-129153 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 2612-2612

Author(s):

Ana Pérez ◽

Olga Salamero ◽

Helena Pomares ◽

Maria Julia Montoro ◽

Montserrat Arnan Sangerman ◽

...

Keyword(s):

Overall Survival ◽

Board Of Directors ◽

Myeloid Leukemia ◽

Research Funding ◽

Poor Prognosis ◽

Advisory Committees ◽

Group 3 ◽

Group 2 ◽

Acute Myeloid ◽

Group 1

According to the 2016 WHO classification, AML-MRC encompasses an heterogeneous group of acute myeloid leukemias (AML) comprising: AML emerged from a previous myelodysplastic syndrome (MDS) or myeloproliferative /myelodysplastic disease (group 1), AML with MDS-defining cytogenetic abnormalities (group 2), or acute myeloid leukemia (AML) with dysplasia in at least 2 cell lineages without the above mentioned (group 3). In spite that AML-MRC has been considered a high-risk entity with poor prognosis, little is known on the relationship of clinical and biological characteristics with outcomes in these three groups. The aim of this study was to describe the clinical and biological characteristics of patients with AML-MRC and analyze their prognostic variables and outcomes. We retrospectively analyzed AML-MRC cases diagnosed between January-2009 and December- 2018 in two institutions. Descriptive variables were studied to compare the three AML-MRC groups. AML cytogenetic risk and response were defined according to the European Leukemia Net recommendations. Overall survival (OS) was considered as the time from the diagnosis to the last visit. Survival analysis were performed with Kaplan Meier method and comparisons with the log-rank test. Among 575 cases of AML identified, 186 (32.3%) met AML-MRC criteria and were included in the study. The main patient characteristics are shown in Table1. Median age was 72 (range, 22-88) years and 32% were female. Adverse karyotype was present in 29% of patients, being more prevalent in the AML-MRC group 2. Sixty one patients (33%) received an intensive chemotherapy approach and 36 (19%) an allogeneic stem cell transplantation. Patients in group 3 exhibit a higher probability of achieving a complete response than groups 1 and 2 (Table 2). After a median follow-up for survivors of 28.5 months (range, 5-130), 149 (80%) died in this period. Three years Overall Survival (OS) for patients in groups 1, 2 and 3 was 3 (0-117), 5 (0-93) and 10 (0-130) months, respectively (p=0.012) (Figure 1). Type of treatment (intensive, non intensive or best supportive care) and cytogenetic risk also showed impact on OS. Multivariant analysis adjusting these factors showed that patients in group 3 also presented better OS than patients in group 1 (HR=0,42 [IC95% 0,18-0,84], p=0,02), both with around a 30% of patients with adverse cytogenetics. To conclude the present study suggests that group 3 of AML-MRC, for which the diagnosis is based solely on morphologic findings, showed better prognosis than the other groups. A more detailed molecular characterization might contribute to improve prognostic stratification of this heterogeneous AML entity, particularly in patients with non-high risk cytogenetics. Disclosures Salamero: Pfizer: Honoraria; Daichii Sankyo: Honoraria; Celgene: Honoraria; Novartis: Honoraria. Valcárcel:Jazz Pharmaceuticals: Honoraria; Novartis: Consultancy, Honoraria, Speakers Bureau; Amgen: Consultancy, Honoraria; Celgene: Consultancy, Honoraria, Other: spouse is an employee in the company, Speakers Bureau; Pfizer: Honoraria. Bosch:AstraZeneca: Honoraria, Research Funding; Acerta: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; AbbVie: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Janssen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Celgene: Honoraria, Research Funding; F. Hoffmann-La Roche Ltd/Genentech, Inc.: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Takeda: Honoraria, Research Funding; Kyte: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Novartis: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau.

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Do MYC Alterations Matter in HIV-Associated Large B Cell Lymphomas? the "Euromyc" Study (a European retrospective study)

Blood ◽

10.1182/blood-2021-151149 ◽

2021 ◽

Vol 138 (Supplement 1) ◽

pp. 2506-2506

Author(s):

Chiara Pagani ◽

Chiara Rusconi ◽

Alessia Dalla Pria ◽

Emanuele Ravano ◽

Philipp Schommers ◽

...

Keyword(s):

B Cell ◽

Board Of Directors ◽

Clinical Characteristics ◽

Prognostic Impact ◽

Advisory Committees ◽

Group 4 ◽

Group 3 ◽

Group 2 ◽

Large B Cell ◽

Group 1

Abstract Introduction: In the general HIV negative population, patients (pts) with diffuse large B cell lymphoma (DLBCL) or high grade B cell lymphoma (HGBCL) carrying MYC rearrangements and BCL2 and/or BCL-6 translocations [double hit (DHL) or triple hit lymphomas (THL)] have shown a dismal prognosis when treated with standard R-CHOP and are frequently candidates to intensive therapeutic regimens, without having a standard of care. Moreover, several authors have demonstrated a negative prognostic impact of isolated MYC rearrangements [single hit lymphomas (SHL)] and the best therapeutic approach for SHL are even less clear. In HIV-associated "non Burkitt" large B cell lymphomas (Ly), scanty data are available on the prevalence and the clinical and prognostic impact of MYC rearrangements, with or without BCL2 and BCL6 concomitant translocations. Due to the peculiar biology and pathogenesis of HIV-associated Ly, data from HIV negative population cannot be simply translated to the HIV positive pts. Aim: To evaluate the impact of MYC rearrangements or translocations (isolated or with BCL2 and/or BCL6 translocations) on clinical features and outcome of HIV-associated large B cell Ly. Methods: Retrospective analysis of clinical characteristics, treatment received and outcome of all HIV-associated large B cell Ly [including DLBCL, B cell Ly unclassifiable, with features intermediate between DLBCL and Burkitt (BCLU), and HGBL] with MYC rearrangements or translocations, evaluated by FISH analysis, in 11 European centers, and comparison with pts who do not have the MYC alterations. Results: One hundred-sixty-one pts were enrolled, 49 (30%) had MYC translocation or other MYC rearrangements (MYC+ pts), and 112 (70%) were negative for MYC mutation (7 pts had MYC increased copy number) (MYC- pts). Table 1 shows the clinical characteristics of the two groups, and the treatment received. MYC+ pts had higher involvement of central nervous system at presentation (17% vs 3%, p 0,023), higher Ki67% (median 91% vs 85%, p 0,005), histology other than DLBCL (32% vs 9%, p 0,0001), concomitant translocation of BCL2 (14% vs 3%, p 0,022), germinal center B phenotype (according to Hans algorithm) (85% vs 49%, p 0,0001). No differences in CD4 count or HIV viral load at Ly diagnosis were found, while a previous diagnosis of AIDS was more frequent in the MYC- group (27% vs 10%, p 0,023). MYC+ pts received more frequently intensive treatment (iCT) (41% vs 12%, p 0,0001) and less frequently the standard CHOP regimen (41% vs 74%, p 0,001). Ten pts (9%) had a DHL/THL and had similar clinical characteristics compared to SHL. With a median follow-up of 62 months, there were no significant differences in overall survival (OS) and progression-free survival (PFS) between MYC+ and MYC- pts (5 years-OS and PFS were respectively 55% and 47% in MYC+ and 59% and 53% in MYC- pts). In univariate analysis for the whole population, IPI≥3, ECOG≥ 2 and increased LDH were related to a worse OS and PFS while BCL2 translocation correlated with shorter PFS alone. In multivariate analysis ECOG and IPI mainteined their negative prognostic impact on OS and PFS. In the MYC+ group, 41% pts received R-CHOP or CHOP-like treatment (group 1), 16% infusional therapy (group 2), 41% iCT (group 3), 2% palliative therapy (PT) (group 4); 5-years OS and PFS were 47% and 32% for group 1, 47% and 37% for group 2, 67% and 68% for group 3 and both 0% for group 4. Median OS and PFS were respectively 18 and 2 months for group 1, 29 and 7 months for group 2, both not reached for group 3, both 2 months for group 4. A significant difference between group 3 and group 1 both in therm of OS (p 0,054) and PFS (p 0,005) was observed (Figure 1). Pts with DHL/THL received R-CHOP (40%), infusional schedule (30%), iCT (20%) and PT (10%). No significant difference in term of PFS and OS were observed for each treatment group with DHL/THL respect to those with SHL. In DHL/THL, 5 years OS and PFS were 50% and 30%, respectively; in SHL 56% and 51%, respectively. Of note, no pts treated with iCT died from toxicity in the MYC+ group. Conclusion: In this retrospective analysis, MYC+ pts had not different clinical characteristics compared to MYC- pts other than higher proliferative index and and more CNS involvement at diagnosis. MYC+ pts were frequently treated with iCT, this aggressive approach seemed feasible and could allow to obtain better outcome compared to standard R-CHOP treatment but further prospective studies are needed. Figure 1 Figure 1. Disclosures Bastos-Oreiro: F. Hoffmann-La Roche: Honoraria, Research Funding, Speakers Bureau; Takeda: Speakers Bureau; Janssen: Honoraria, Speakers Bureau; Kite: Speakers Bureau; Gilead: Honoraria; BMS-Celgene: Honoraria, Speakers Bureau; Novartis: Honoraria, Speakers Bureau. Arcaini: Celgene, Roche, Janssen-Cilag, Gilead: Other: Travel expenses; Bayer, Celgene, Gilead Sciences, Roche, Sandoz, Janssen-Cilag, VERASTEM: Consultancy; Gilead Sciences: Research Funding; Celgene: Speakers Bureau. Rossi: Novartis: Membership on an entity's Board of Directors or advisory committees; Daiichi Sankyo: Consultancy, Honoraria; Astellas: Membership on an entity's Board of Directors or advisory committees; Amgen: Honoraria, Membership on an entity's Board of Directors or advisory committees; Alexion: Membership on an entity's Board of Directors or advisory committees; Abbvie: Membership on an entity's Board of Directors or advisory committees; Pfizer: Membership on an entity's Board of Directors or advisory committees; Jazz: Membership on an entity's Board of Directors or advisory committees; Janssen: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees; Sanofi: Honoraria; Takeda: Membership on an entity's Board of Directors or advisory committees. Tucci: janssen: Membership on an entity's Board of Directors or advisory committees; Gentili: Membership on an entity's Board of Directors or advisory committees; Takeda: Membership on an entity's Board of Directors or advisory committees.

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A Comparison of Droplet Digital PCR and RT-qPCR for BCR-ABL1 Monitoring in Chronic Myeloid Leukemia

Blood ◽

10.1182/blood-2019-125614 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 2092-2092

Author(s):

Carmen Fava ◽

Paola Berchialla ◽

Jessica Petiti ◽

Maria Teresa Bochicchio ◽

Barbara Izzo ◽

...

Keyword(s):

Board Of Directors ◽

Digital Pcr ◽

Advisory Committees ◽

Coefficients Of Variation ◽

One Step ◽

Group 3 ◽

Group 5 ◽

Group 2 ◽

The One ◽

Group 1

Background: Monitoring of BCR-ABL1 molecular levels is essential for the management of Chronic Myeloid Leukemia (CML) patients treated with Tyrosine Kinases Inhibitors (TKIs). Real Time Quantitative PCR (RT-qPCR) is currently the standard method for assessing molecular remission (MR) in patients with CML. Recently, droplet digital PCR (ddPCR) has emerged to provide a more accurate detection of minimal residual disease (MRD). In order to hypothesize the use of this new technology in the clinical practice, in the era of TKI discontinuation, we designed a multi-centric study to evaluate the potential value of ddPCR in diagnostic routine. Aims of the study were:1) the evaluation of the agreement between the measures obtained by ddPCR and RT-qPCR and 2) the assessment of the repeatability of the two methods. Methods: Total RNA was extracted from 37 CML patients using Maxwell 16 LEV simplyRNA Blood kit (Promega), following the manufacturer's instructions. Samples were divided in 5 groups based on molecular response (MR) as follow: group 1, MR<3, n=5; group 2, MR 3, n=5; group 3, MR 4, n=9; group 4, MR 4.5, n=9 and group 5, MR 5, n=9. BCR-ABL1 p210 was quantified by RT-qPCR and ddPCR in 3 different Italian laboratories namely Lab A, Lab B and Lab C. Lab B and C performed 1 amplification session each, while Lab A performed 3 independent sessions. All ddPCR experiments were performed using Kit QXDxTM BCR-ABL%IS (Bio-Rad) on the QX200 system (Bio-Rad), according to the manufacturer's instructions. For RT-qPCR experiments, BCR-ABL1 p210 was quantified with three different methods: by using the One-Step BCR-ABL P210 ELITe MGB Kit (ELITech Group), according to manufacturer's protocol (Lab A); by using the One-Step Philadelphia SensiQuant Kit (Bioclarma), according to the manufacturer's instructions (Lab B) and as described in Gabert et al (Lab C). The results obtained were corrected for the laboratory-specific conversion factor, as recommended by Standard Operating Procedures of Labnet CML network (GIMEMA group). The target quantification for each sample was expressed as BCR-ABL1/ABL1 %IS for both RT-qPCR and ddPCR. Statistical analysis: Bland-Altman analysis was performed. For the measurement of the agreement we reported the bias, which is the mean of the difference between the methods, the 95% limits of agreement and the coefficient of variation. Residual variance and coefficients of repeatability (i.e. the upper limits of a prediction interval for the absolute difference between two measurements by the same method on the same item) were computed to achieve the second endpoint. An analysis of sensitivity on the labs was also carried out. All analyses were stratified by the level of disease. Results: A total of 370 measures were included in the analysis, 185 for ddPCR and 185 for RT-qPCR divided as follow: 50 for group 1 and for group 2, 90 for group 3, 4 and 5. In Table 1 we reported the median and interquartile range (IQR) for all levels of disease. Results of the Bland-Altman analysis are shown in Table 2. The coefficients of variation, which expresses the standard deviation as a percentage of the mean, were 2.35, 2.31, 1.10, 1.34, 39.12 in group 1, 2, 3, 4 and 5 respectively. The repeatability coefficients of ddPCR were smaller than qRT-PCR across all the levels of disease, showing a slightly better precision of ddPCR (Table 2). Conclusions: Higher coefficients of variation in group 1 and 2 were probably due to a greater heterogeneity of the patients. In fact, BCR-ABL1/ABL1 levels by RT-qPCR ranged between 1.43 and 6.94 and between 0.10 and 0.25 in group 1 and in group 2 respectively (Table 1). Sensitivity analysis showed that the high coefficient of variation in group 5 can be explained almost all by the variability observed in Lab B. Coefficient of repeatability of ddPCR was always smaller than RT-qPCR for all level of disease showing a slightly better precision. Our results showed that ddPCR has a good agreement with RT-qPCR and it is more precise to quantify BCR-ABL1 transcript levels, particularly for MR 4 and MR 4.5. Thus, ddPCR may be valuable in diagnostic routine. Disclosures Fava: Novartis: Honoraria; BMS: Honoraria; Pfizer: Honoraria; Incyte: Honoraria. Martino:Bio-Rad: Employment. Saglio:Ariad: Consultancy; Incyte: Consultancy; Pfizer: Consultancy; Jansen: Consultancy; Celgene: Consultancy; Novartis: Consultancy; BMS: Consultancy. Martinelli:Roche: Consultancy; BMS: Consultancy; Novartis: Consultancy; ARIAD: Consultancy; Pfizer: Consultancy. Pane:Novartis: Membership on an entity's Board of Directors or advisory committees, Other: research founding; Janssen: Membership on an entity's Board of Directors or advisory committees; GSK: Membership on an entity's Board of Directors or advisory committees; Amgen: Membership on an entity's Board of Directors or advisory committees; BMS: Membership on an entity's Board of Directors or advisory committees. Cilloni:Novartis: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees; Janssen: Membership on an entity's Board of Directors or advisory committees.

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Single Arm, Prospective, Open-Label Phase II Trial to Evaluate the Efficacy of Isatuximab in Patients with Monoclonal Gammopathy of Renal Significance

Blood ◽

10.1182/blood-2019-123496 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 3161-3161 ◽

Cited By ~ 1

Author(s):

Vikram Premkumar ◽

Suzanne Lentzsch ◽

Divaya Bhutani

Keyword(s):

Multiple Myeloma ◽

B Cell ◽

Plasma Cell ◽

Monoclonal Gammopathy ◽

Plasma Cells ◽

Cell Clone ◽

Advisory Committees ◽

Renal Response ◽

Hematologic Response ◽

Stable Renal Function

Background: Monoclonal gammopathy of renal significance (MGRS) is a monoclonal B cell disorder, not meeting the definition of lymphoma or myeloma, that produces monoclonal proteins which deposit in the kidneys. Permanent renal damage can occur either as a consequence of direct deposition of toxic proteins or by an induced inflammatory response. Due to the low burden of the plasma cell clone, patients do not otherwise qualify for potentially toxic anti-plasma cell treatments and treatment is generally based on consensus opinion. To date there are no clinical trials exploring treatment options. Isatuximab is a chimeric mouse/human IgG1k monoclonal antibody which targets CD38 on both malignant and normal plasma cells and exhibits it antitumor effects primarily by antibody-dependent cellular toxicity. Isatuximab has recently been shown to be an active drug in the treatment of multiple myeloma, with improvements seen in hematologic and renal markers, and has been shown to have manageable toxicity. Given the efficacy of isatuximab in multiple myeloma, we propose a trial evaluating isatuximab monotherapy to treat the small plasma cell clone in MGRS with the hopes of maximizing response and minimizing toxicity. Study Design and Methods: The primary objective of this study is to evaluate efficacy of isatuximab monotherapy in patients with MGRS in order to establish a standard of care treatment for patients with this disease. Adult patients with proteinuria of at least 1 gram in 24 hours and a histopathological diagnosis of MGRS on renal biopsy in the last 24 months will be eligible for the trial. Patients will be excluded if their estimated GFR is below 30 mL/min, they have multiple myeloma, high risk smoldering myeloma, other B cell neoplasm meeting criteria for treatment, concurrent diabetic nephropathy, or require dialysis. Patients will be screened for B cell disorders with bone marrow biopsy and aspirate, serum protein electrophoresis (SPEP) with immunofixation (IFE), 24-hour urine protein electrophoresis (UPEP), free light chain (FLC) testing and screening PET/CT at time of enrollment. Enrolled patients will be administered isatuximab 20 mg/kg IV weekly for 4 weeks and then will receive the same dose every 2 weeks thereafter for a total of 6 months. Patients may be continued on treatment following completion of the 6 months at the discretion of the provider. To reduce the risk of infusion related reactions, patients will receive premedications with corticosteroids, diphenhydramine, H2 blockade and acetaminophen at least 60 minutes prior to infusion. Patients will have repeat SPEP + IFE, 24-hour UPEP + IFE and FLC testing every 4 weeks. There will be an optional repeat kidney biopsy 9-12 months following treatment initiation to assess pathologic response in the kidneys. Statistical Methods: The study will be comprised of 20 patients being treated with isatuximab over a span of 24-30 months. Ten patients will be initiated on the therapy for a period of 6 months. Interim analysis will be done after these patients have completed all the treatment cycles. If 4 out of 10 patients show response in form of improved/stable renal function, the study will proceed to include next 10 patients. If >50% of the first group of 10 patients show doubling of creatinine while on therapy, that would be considered as an indication to discontinue the therapy and the study due to drug toxicity. Endpoints: The primary endpoint will be efficacy as measured by renal response and hematologic response. Renal response will be measured by assessing the amount of proteinuria in a 24 hour urine sample. A sustained reduction in proteinuria by 30% from the patient's baseline amount of proteinuria with stable renal function (serum eGFR within 20% of baseline) will be considered a positive renal response. Hematologic response will be quantified per the 2016 International Myeloma Working Group (IMWG) uniform response criteria for multiple myeloma. An important secondary endpoint will be safety and will be analyzed from all patients who receive any study drug. Adverse events will be characterized and graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE) version 5.0. Other endpoints include time to dialysis and rate of minimal residual disease (MRD) negativity. Disclosures Lentzsch: Caelum Biosciences: Equity Ownership, Membership on an entity's Board of Directors or advisory committees; Bayer: Consultancy; Janssen: Consultancy; Takeda: Consultancy; BMS: Consultancy; Proclara: Consultancy; Abbvie: Consultancy; Clinical Care Options: Speakers Bureau; Sanofi: Consultancy, Research Funding; Multiple Myeloma Research Foundation: Honoraria; International Myeloma Foundation: Honoraria; Karyopharm: Research Funding; Columbia University: Patents & Royalties: 11-1F4mAb as anti-amyloid strategy. Bhutani:Sanofi: Membership on an entity's Board of Directors or advisory committees. OffLabel Disclosure: Our trial will be evaluating the efficacy of targeting CD38 on plasma cells with isatuximab in patients with monoclonal gammopathy of renal significance (MGRS). We will evaluate the effects of this drug on 24 hour proteinuria and hematologic response.

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Dual Targeting of -TORC1 and -TORC2 as a New Strategy In the Treatment of Multiple Myeloma

Blood ◽

10.1182/blood.v116.21.133.133 ◽

2010 ◽

Vol 116 (21) ◽

pp. 133-133 ◽

Cited By ~ 2

Author(s):

Patricia Maiso ◽

AbdelKareem Azab ◽

Yang Liu ◽

Yong Zhang ◽

Feda Azab ◽

...

Keyword(s):

Cell Cycle ◽

Multiple Myeloma ◽

Bone Marrow ◽

Board Of Directors ◽

Cell Lines ◽

Mechanism Of Action ◽

Plasma Cells ◽

Bone Marrow Microenvironment ◽

Advisory Committees

Abstract Abstract 133 Introduction: Mammalian target of rapamycin (mTOR) is a downstream serine/threonine kinase of the PI3K/Akt pathway that integrates signals from the tumor microenvironment such as cytokines and growth factors, nutrients and stresses to regulate multiple cellular processes, including translation, autophagy, metabolism, growth, motility and survival. Mechanistically, mTOR operates in two distinct multi-protein complexes, TORC1 and TORC2. Activation of TORC1 leads to the phosphorylation of p70S6 kinase and 4E-BP1, while activation of TORC2 regulates phosphorylation of Akt and other AGC kinases. In multiple myeloma (MM), PI3K/Akt plays an essential role enhancing cell growth and survival and is activated by the loss of the tumor suppressor gene PTEN and by the bone marrow microenvironment. Rapamycin analogues such as RAD001 and CCI-779 have been tested in clinical trials in MM. Their efficacy as single agents is modest, but when used in combination, they show higher responses. However, total inhibition of Akt and 4E-BP1 signaling requires inactivation of both complexes TORC1 and TORC2. Consequently, there is a need for novel inhibitors that can target mTOR in both signaling complexes. In this study we have evaluated the role of TORC1 and TORC2 in MM and the activity and mechanism of action of INK128, a novel, potent, selective and orally active small molecule TORC1/2 kinase inhibitor. Methods: Nine different MM cell lines and BM samples from MM patients were used in the study. The mechanism of action was investigated by MTT, Annexin V, cell cycle analysis, Western-blotting and siRNA assays. For the in vivo analyses, Luc+/GFP+ MM.1S cells (2 × 106/mouse) were injected into the tail vein of 30 SCID mice and tumor progression was detected by bioluminescence imaging. Nanofluidic proteomic immunoassays were performed in selected tumors. Results: To examine activation of the mTOR pathway in MM, we performed kinase activity assays and protein analyses of mTOR complexes and its downstream targets in nine MM cell lines. We found mTOR, Akt, pS6R and 4E-BP1 are constitutively activated in all cell lines tested independently of the status of Deptor, PTEN, and PI3K. All cell lines expressed either Raptor, Rictor or both; excepting H929 and U266LR7 which were negative for both of them. Moreover, primary plasma cells from several MM patients highly expressed pS6R while normal cells were negative for this protein. We found that INK128 and rapamycin effectively suppressed phosphorylation of p6SR, but only INK128 was able to decrease phosphorylation of 4E-BP1. We observed that INK128 fully suppressed cell viability in a dose and time dependent manner, but rapamycin reached a plateau in efficacy at ± 60%. The IC50 of INK128 was in the range of 7.5–30 nM in the eight cell lines tested. Similar results were observed in freshly isolated plasma cells from MM patients. Besides the induction of apoptosis and cell cycle arrest, INK128 was more potent than rapamycin to induce autophagy, and only INK128 was able to induce PARP and Caspases 3, 8 and 9 cleavage. In the bone marrow microenvironment context, INK128 inhibited the proliferation of MM cells and decreased the p4E-BP1 induction. Importantly, treatment with rapamycin under such conditions did not affect cell proliferation. INK128 also showed a significantly greater effect inhibiting cell adhesion to fibronectin OPM2 MM1S, BMSCs and HUVECs compared to rapamycin. These results were confirmed in vivo. Oral daily treatment of NK128 (1.0 mg/kg) decreased tumor growth and improved survival of mice implanted with MM1S. Conclusion: Dual inhibition of TORC1 and TORC2 represent a new and promising approach in the treatment of MM and its microenvironment. The ability of INK128 to inhibit both TORC1 and TORC2 strongly supports the potential use of this compound in MM patients. Disclosures: Anderson: Millennium Pharmaceuticals: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau. Ghobrial:Celgene: Membership on an entity's Board of Directors or advisory committees; Millennium: Membership on an entity's Board of Directors or advisory committees; Novartis: Membership on an entity's Board of Directors or advisory committees.

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B Cell Lymphoma In Association with Multiple Myeloma: Analysis of the Biologic Relationship

Blood ◽

10.1182/blood.v118.21.1590.1590 ◽

2011 ◽

Vol 118 (21) ◽

pp. 1590-1590 ◽

Cited By ~ 3

Author(s):

Anuj K. Mahindra ◽

Aliyah R. Sohani ◽

Christiana E. Toomey ◽

James S. Michaelson ◽

Jeffrey A. Barnes ◽

...

Keyword(s):

Multiple Myeloma ◽

B Cell ◽

Board Of Directors ◽

Light Chain ◽

Cell Lymphoma ◽

B Cell Lymphoma ◽

Prior History ◽

Advisory Committees ◽

Age Of Diagnosis ◽

History Of

Abstract Abstract 1590 Background: The occurrence of a secondary lymphoma in patients with a prior history of B-cell lymphomas has been reported.1, 2 There are few reported occurrences of Multiple Myeloma (MM) in patients (pts) with a prior history of lymphoma and the biologic relationship between the two neoplasms in such cases is unknown. Methods: We queried our IRB approved clinicopathologic database of hematologic malignancies for patients with lymphoma and MM. Of the 4165 pts with B-cell lymphoma and 804 pts with MM, 6 pts with a history of B-cell lymphoma developed MM and 1 patient with a prior history of MM developed a B-cell lymphoma. We describe the morphology, immunophenotype, and clinical features of the 7 pts. The clonal relationship of the 2 components was analyzed using sequencing analysis of immunoglobulin heavy chain variable region (IgVH) genes and by light chain restriction. Results: There were 5 men and 2 women (median age of diagnosis of lymphoma, 65 years; median age of diagnosis of MM, 71 years). The pts with lymphoma included 2 pts with diffuse large B cell lymphoma, 2 pts with small lymphocytic lymphoma, 2 pts with follicular lymphoma and 1 patient with lymphoplasmacytic lymphoma. The development of MM was metachronous in 5 cases, following B-cell lymphoma by 3 years to 23 years and synchronous in 1 case. In 1 patient, the B-cell lymphoma developed 6 years after the diagnosis of MM. 6 pts achieved complete remission after treatment for lymphoma and 1 patient is ongoing treatment. 6 of the 7 pts required treatment for MM soon after diagnosis. 1 patient has smoldering MM and continues to be observed 57 months after diagnosis. FISH analysis indicated IgH rearrangement in 3 pts with MM; 1 patient with 17p deletion and monosomy 13; 3 pts had normal FISH and metaphase cytogenetics. In 3 pts, both neoplasms were kappa light chain restricted; in 1 patient both were lambda restricted; in 1 patient, the lymphoma was lambda light chain restricted while the MM was kappa light chain restricted and the reverse in another pt; in 1 patient the B-cell lymphoma was light chain negative and the MM was kappa restricted. IgVH rearrangement studies in 4 patients in whom tissue samples were available indicated that the two were clonally unrelated in 3 patients and related in only 1 patient. Conclusion: Clonality analysis of rearranged immunoglobulin genes from patients with both B-cell lymphoma and MM provide evidence of separate clonal origins of the two tumors in the majority of cases, thus excluding secondary transformation of the original B-cell clone. The presence or absence of a genetic predisposition to the development of multiple B cell malignancies requires further study.3 Disclosures: Off Label Use: The combination of lenalidomide and everolimue is an off label use in multiple myeloma. Abramson:Genentech: Consultancy; Novartis: Consultancy. Raje:Amgen: Membership on an entity's Board of Directors or advisory committees; Astra Zeneca: Research Funding; Millenium: Membership on an entity's Board of Directors or advisory committees; Novartis: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees; Acetylon: Research Funding.

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