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In: SSRN Electronic Journal, Elsevier BV

Type of Medium: Online Resource

ISSN: 1556-5068

URL: Article

DOI: 10.2139/ssrn.3516132

Language: English

Publisher: Elsevier BV

Publication Date: 2020

In: The Lancet Haematology, Elsevier BV, Vol. 7, No. 6 ( 2020-06), p. e456-e468

Type of Medium: Online Resource

ISSN: 2352-3026

URL: Article

DOI: 10.1016/S2352-3026(20)30099-5

Language: English

Publisher: Elsevier BV

Publication Date: 2020

In: Blood, American Society of Hematology, Vol. 124, No. 21 ( 2014-12-06), p. 4734-4734

Abstract: Introduction: Bendamustine, a bifunctional alkylating agent, exerts a mechanism of action different from that of other conventional alkylators despite it remains mostly unknown. In patients with newly diagnosed or relapsed-refractory MM bendamustine has proven to be active either as monotherapy or in combination with new drugs, particularly bortezomib and immunomodulatory agents. Methods: The preliminary results of this prospective, phase II study conducted in 22 Italian centres are recently published (Blood Cancer J. 2013, 3: e162). Here we present the conclusive results of the combination Bendamustine (70 mg/m2 days 1, 8), Bortezomib (1.3 mg/ m2 days 1, 4, 8, 11) and Dexamethasone (20 mg days 1-2, 4-5, 8-9, 11-12) (BVD) administered every 4 weeks in patients with relapsed-refractory MM of any age, with adequate cardiac, liver and hematological function, not refractory to bortezomib and treated with no more than four previous lines of therapy. The primary endpoint of this study was achievement of a response at least PR, as to IMWG criteria, after four cycles of BVD. Patients achieving a response less than a PR were taken off-study. Patients obtaining at least a PR received two additional treatment cycles followed by a 12-months consolidation phase with cycles repeated every 2 months. Therefore, patients with a PR after the induction phase could receive up to 18 months of treatment and up to 12 cycles of BVD. Results: 75 patients were included in the study. Median age was 68 years (range 41-85 years), 26.5% had ISS stage 3, 19% IgA myeloma and 9% renal failure. Eight of 36 evaluable patients (22%) had high-risk cytogenetics. Patients had received a median of one prior line of therapy (range 1-4). All patients had received prior treatment with new drugs, such as thalidomide (57%), lenalidomide (54.5%), bortezomib (46.5%) or both (20%). Twenty-four patients (32%) were refractory to IMIDs. Best response rate was 75%, including 14 CRs (20%), 22 VGPRs (24%) and 27 PRs (31%). Five patients (6.5%) died early. Only prior treatment with bortezomib significantly reduced the response rate ≥ PR (48.5% vs 80%; P = 0.004). At a median follow-up of 27 months (range 18-38), 45 patients had progressed and 43 had died. Median TTP and PFS were 17 and 12.5 months, respectively while median OS was 24 months (40% at 3 years). After longer follow-up, prior therapy with bortezomib plus lenalidomide was confirmed as the only factor that significantly reduced TTP (9 vs 19 months; HR = 2.7; 95% CI = 1.3-5.8; P = 0.009), PFS (9 vs 15 months; HR = 2.1; 95% CI = 1.2-3.8; P = 0.020) and OS (17 vs 32 months; HR = 2.1; 95% CI = 1.2-3.9; P = 0.043). Grade 3-4 adverse events occurred in 55% of patients leading to therapy reduction in 24% and to protocol discontinuation in 11% of patients. The most frequent severe adverse events were thrombocytopenia (28%), neutropenia (20%), infections (12%), peripheral neuropathy (9%), gastrointestinal (5%) and cardiovascular events (4%). Compared with younger, patients aged 〉 70 years had a significantly higher incidence of grade 3-4 side effects particularly thrombocytopenia and infections with, consequently, a higher rate of therapy reduction and discontinuation. Moreover, 4/5 early deaths occurred in patients aged more than 70 years. Conclusions: BVD combination is an effective and well tolerated regimen in relapsed-refractory MM. Data suggest that the optimal target of BVD maybe patients younger than 70 years who has not previously received both bortezomib and lenalidomide. Disclosures Offidani: Mundipharma, Janssen: Honoraria. Off Label Use: Bendamustine. Corvatta:Janssen: Honoraria. Ballanti:Janssen: Honoraria. Brunori:Janssen: Honoraria.

Type of Medium: Online Resource

ISSN: 0006-4971 , 1528-0020

URL: Article

DOI: 10.1182/blood.V124.21.4734.4734

Language: English

Publisher: American Society of Hematology

Publication Date: 2014

detail.hit.zdb_id: 1468538-3

detail.hit.zdb_id: 80069-7

In: Blood, American Society of Hematology, Vol. 134, No. Supplement_1 ( 2019-11-13), p. 3195-3195

Abstract: INTRODUCTION. Bortezomib- and/or lenalidomide-based combinations are standard initial approaches in transplant (ASCT) ineligible NDMM. Different studies confirmed the advantages of continuous treatment. Despite the benefits of bortezomib maintenance, the parenteral administration and the risk of peripheral neuropathy (PN) limit its long-term use. The oral proteasome inhibitor (PI) Ixazomib plus Lenalidomide-dexamethasone was effective and well tolerated at diagnosis or relapse. The need for a convenient and well tolerated PI-based frontline therapy for an extended duration with minimal cumulative toxicity remains an unmet need for the elderly. In this prospective, multicenter, phase II randomized study, we assessed Ixazomib in combination with dexamethasone, Cyclophosphamide, Thalidomide or Bendamustine, followed by Ixazomib maintenance in ASCT-ineligible NDMM. METHODS. NDMM patients (pts) ≥65 years old or younger ASCT-ineligible could be enrolled. Treatment consisted of nine 28-day induction cycles of Ixazomib 4 mg on days 1,8,15 and dexamethasone 40 mg on days 1,8,15,22 (Id) or combined with Cyclophosphamide 300 mg/m2 orally on days 1,8,15 (ICd) or plus Thalidomide 100 mg/day (ITd) or plus Bendamustine 75 mg/m2 iv on days 1,8 (IBd); followed by maintenance with Ixazomib 4 mg on days 1,8,15 until progression. Because the study included the novel drug Ixazomib, dual stopping rules combining efficacy (at least very good partial response [VGPR] rate), and safety (predefined toxicity possibly related to Ixazomib) were planned and analyzed in a cohort of 5 patients in each arm during the first 4 cycles. Here we report the results of the cohort analysis during the first 4 cycles and the efficacy and safety analysis during induction treatment. RESULTS. In February 2017, the protocol was amended due to a low enrolment and the IBd arm, the only one including an iv drug, was closed. After closing this arm, all the other all oral arms continued the enrolment. Overall, 175 pts were enrolled (Id 42, ICd 61, ITd 61, and IBd 11 pts) and 171 pts started treatment. Median age was 74 years, 20% of pts had high risk cytogenetics, 44% were fit, 30% intermediate and 26% frail, according to the IMWG frailty score. Median follow-up was 13.2 months (IQR 8.9-20.7). During the first 4 cycles, at least VGPR rate was 24% with Id, 33% with ICd, 31% with ITd and 18% with IBd. In March 2018, after the analysis of the 4th cohort, the Id arm was closed due to high risk of inefficacy. Overall response rate (ORR) during induction was 73%, VGPR was 39%. ≥VGPR rates were 24% in Id, 48% in ICd, 43% in ITd and 27% in IBd. Median time to first response was 2.4 and to the best response 4 months. Responses were comparable according to cytogenetics: in high risk pts, ORR was 77%, ≥VGPR 46% and ≥nCR 17% as compared to 71%, 36% and 18% in standard risk pts (p=0.53, p=0.33 and p=1, respectively). Response rates were also comparable according to frailty status: in frail pts, ORR was 73%, ≥VGPR 36% and ≥nCR 11% as compared to 75%, 40% and 17% in intermediate and 70%, 40% and 22% in fit pts (p=0.78, p=0.90 and p=0.32, respectively). Median number of induction cycles was 9 (IQR 5-9); 93 (53%) pts completed induction treatment and 14 (8%) pts are still on induction treatment. During the first 4 cycles, hematologic toxicity was limited, and non-hematologic toxicity manageable. The most frequent G3-4 adverse event (AE) was rash in ITd arm (11%); discontinuation rate due to toxicity was 6%. During induction, the rate of at least 1 hematologic G≥3 AE was 11% and at least 1 non-hematologic G≥3 AE was 44%. The most frequent G≥3 AEs were neutropenia (8%), gastrointestinal (9%), infections (11%), neurologic (11%) and dermatologic (6%). G3-4 thrombocytopenia (3%) and PN (5%) were limited. Ixazomib dose reduction due to AEs was required in 15% of pts. The rate of non-hematologic AEs was slightly higher in ITd arm (37% in Id, 37% in ICd, 53% in ITd, 55% in IBd). Early death rate ( 〈 60 days from start therapy) was 1%. CONCLUSIONS. ITd and ICd are convenient all-oral induction regimens for ASCT-ineligible NDMM, confirming an improved efficacy of a triplet vs a doublet combination, also in intermediate and frail patients. Id showed lower efficacy, thus suggesting a possible effect of the dose of Ixazomib or the absence of a third drug. Treatment was feasible, with limited toxicity and low discontinuation rate due to AEs, although ITd induced a slightly higher toxicity, but mainly attributable to Thalidomide. Disclosures Larocca: Amgen: Honoraria; Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees; Takeda: Membership on an entity's Board of Directors or advisory committees; Bristol-Myers Squibb: Honoraria, Membership on an entity's Board of Directors or advisory committees; Janssen: Honoraria, Membership on an entity's Board of Directors or advisory committees. Corradini:Servier: Honoraria; Amgen: Honoraria; Gilead: Honoraria, Other: Travel Costs; Takeda: Honoraria, Other: Travel Costs; BMS: Other: Travel Costs; Kite: Honoraria; Novartis: Honoraria, Other: Travel Costs; Roche: Honoraria; Sanofi: Honoraria; KiowaKirin: Honoraria; Jazz Pharmaceutics: Honoraria; Daiichi Sankyo: Honoraria; Janssen: Honoraria, Other: Travel Costs; AbbVie: Consultancy, Honoraria, Other: Travel Costs; Celgene: Honoraria, Other: Travel Costs. Mina:Amgen: Honoraria; Celgene: Honoraria; Janssen: Honoraria. Liberati:Bristol-Myers Squibb: Honoraria; Roche: Other: Clinical trial support; Takeda: Membership on an entity's Board of Directors or advisory committees; Amgen: Membership on an entity's Board of Directors or advisory committees, Other: Clinical trial support; Janssen: Honoraria; AbbVie: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Clinical trial support; Servier: Honoraria, Membership on an entity's Board of Directors or advisory committees; Incyte: Consultancy; Celgene: Honoraria, Other: Clinical trial support; Novartis: Other: Clinical trial support. Petrucci:Takeda: Honoraria, Membership on an entity's Board of Directors or advisory committees; Amgen: 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; Janssen-Cilag: Honoraria, Membership on an entity's Board of Directors or advisory committees; Bristol-Myers Squibb: Honoraria, Membership on an entity's Board of Directors or advisory committees; Sanofi: Honoraria, Membership on an entity's Board of Directors or advisory committees. Patriarca:Celgene: Membership on an entity's Board of Directors or advisory committees; Janssen: Membership on an entity's Board of Directors or advisory committees; Takeda: Membership on an entity's Board of Directors or advisory committees. Zambello:Janssen: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees. Belotti:Amgen: 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. Cellini:Amgen: Membership on an entity's Board of Directors or advisory committees; Sanofi: Honoraria; Janssen: Honoraria. Galli:Takeda: Honoraria; Leadiant (Sigma-Tau): Honoraria; Janssen: Honoraria; Celgene: Honoraria; Bristol-Myers Squibb: Honoraria. Aquino:Celgene: Membership on an entity's Board of Directors or advisory committees; Janssen: Membership on an entity's Board of Directors or advisory committees; Amgen: Membership on an entity's Board of Directors or advisory committees. De Sabbata:Janssen: Membership on an entity's Board of Directors or advisory committees; Amgen: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees. Ballanti:Bristol-Myers Squibb: Honoraria; Janssen: Honoraria; Celgene: Honoraria; Amgen: Honoraria. Offidani:Janssen: Honoraria, Membership on an entity's Board of Directors or advisory committees; Takeda: Honoraria, Membership on an entity's Board of Directors or advisory committees; Amgen: Honoraria, Membership on an entity's Board of Directors or advisory committees; Bristol-Myers Squibb: 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. Boccadoro:Janssen: Honoraria, Research Funding; Sanofi: Honoraria, Research Funding; Novartis: Honoraria, Research Funding; Bristol-Myers Squibb: Honoraria, Research Funding; AbbVie: Honoraria; Mundipharma: Research Funding; Celgene: Honoraria, Research Funding; Amgen: Honoraria, Research Funding. Bringhen:Celgene Corporation: Honoraria, Membership on an entity's Board of Directors or advisory committees; Amgen: Honoraria, Membership on an entity's Board of Directors or advisory committees; Janssen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Karyopharm: Membership on an entity's Board of Directors or advisory committees; Takeda: Consultancy; Bristol-Myers Squibb: Honoraria. OffLabel Disclosure: The presentation includes discussion of off-label use of a drug or drugs for the treatment of multiple myeloma.

Type of Medium: Online Resource

ISSN: 0006-4971 , 1528-0020

URL: Article

DOI: 10.1182/blood-2019-124388

Language: English

Publisher: American Society of Hematology

Publication Date: 2019

detail.hit.zdb_id: 1468538-3

detail.hit.zdb_id: 80069-7

In: Blood, American Society of Hematology, Vol. 128, No. 22 ( 2016-12-02), p. 991-991

Abstract: Background The role of single vs double autologous stem cell transplantation (ASCT) in patients with newly diagnosed (ND) multiple myeloma (MM) needs to be prospectively investigated in the novel agent era. Methods The phase III EMN02/HO95 study was designed to compare (first randomization, R1) (stratification according to ISS stage) standard-dose intensification therapy with bortezomib-melphalan-prednisone (VMP) vs high-dose intensification therapy with melphalan at 200 mg/m2 (HDM) followed by ASCT after 3-4 cycles of bortezomib-cyclophosphamide-dexamethasone as induction therapy. A second randomization to consolidation therapy vs no consolidation was performed after intensification therapy, to be followed by lenalidomide maintenance until progression or toxicity in both arms. A primary study endpoint was progression-free survival (PFS) from R1. In centers with a policy of double ASCT, patients were randomized in a 1:1:1 ratio to either VMP or single ASCT (ASCT-1) or two sequential courses (administered 2 to 3 months apart) of HDM and double ASCT (ASCT-2) in order to prospectively compare ASCT-1 with ASCT-2, which was an additional study objective. Results From February 2011 to April 2014, 1510 pts aged ≤65 years with symptomatic NDMM were registered and 1192 of these were eligible for R1. According to the design of the study, 614 eligible patients who received the diagnosis of MM in centers with a double intensification policy were randomly assigned to either VMP (n=199) or ASCT-1 (n=208) or ASCT-2 (n=207). Patients randomized to ASCT-1 or ASCT-2 were included in the current pre-specified analysis. Median age was 59 years for patients in the ASCT-1 group and 57 years for those in the ASCT-2 group. The frequency of ISS stage III was 18% and 19%, while revised ISS stage III was 9% and 11%, respectively. Cytogenetic abnormalities were detected by FISH analysis of CD138+ plasma cells. A high-risk (HR) cytogenetic profile, defined by t(4;14) and/or del(17p) and/or t(14;16) (HR cyto-3), was observed in 26% of evaluable patients who were randomized to ASCT-1 and in 21% of those randomly assigned to ASCT-2. If amp(1q) and/or del(1p) were added for the definition of high-risk disease, a HR cytogenetic profile that included at least 1 of the 5 above mentioned chromosomal abnormalities (HR cyto-5) was reported in 55% of evaluable patients in the ASCT-1 group and in 54% of those in the ASCT-2 group. Median follow-up from R1 was 27 (IQR: 20-35) months. On an intention-to-treat basis, the median PFS was 45 months in the ASCT-1 arm and was not yet reached for patients in the ASCT-2 arm; 3-year estimates of PFS were 60% and 73%, respectively (HR=0.66; 95% CI=0.45-0.96; P=0.030). PFS benefit with ASCT-2 was retained across predefined subgroups, including patients with β2-microglobulin 〉 3.5 mg/L (HR=0.59; CI=0.34-0.99; P=0.005), bone marrow plasma cells 〉 60% (HR=0.41; CI=0.22-0.77; P=0.006), LDH values above the upper limits (HR=0.52; CI=0.28-095; P=0.034), revised ISS stage II (HR=0.50; CI=0.31-0.80; p=0.004), HR cyto-3 (HR=0.49; CI=0.24-1.02; P=0.057) and HR cyto-5 (HR=0.57; CI=0.35-0.93; P=0.024). In a multivariate Cox regression analysis stratified by ISS stage, randomization to ASCT-2 (HR=0.62; CI=0.40-0.95; P=0.027) and HR cyto-5 (HR=2.63; CI=1.63-4.16; P 〈 0.001) were the leading independent predictors of PFS. Overall survival was not yet mature and no difference between the two treatment groups was evident. Conclusions Upfront double ASCT after bortezomib-based induction therapy for newly diagnosed MM was superior over a single ASCT in terms of prolonged PFS. Clinical benefits of double ASCT were mostly seen in patients with disease-related factors predicting for poor prognosis. Disclosures Cavo: Bristol-Myers Squibb: Honoraria; Takeda: Honoraria; Celgene: Honoraria, Research Funding; Janssen: Honoraria, Research Funding; Amgen: Honoraria. Offidani:Janssen: Honoraria; Celgene: Honoraria, Research Funding. Boccadoro:Janssen: Honoraria, Research Funding; CELGENE: Honoraria, Research Funding; Mundipharma: Research Funding; Amgen: Honoraria, Research Funding; SANOFI: Honoraria, Research Funding; BMS: Honoraria, Research Funding; Novartis: Honoraria, Research Funding; Abbivie: Honoraria.

Type of Medium: Online Resource

ISSN: 0006-4971 , 1528-0020

URL: Article

DOI: 10.1182/blood.V128.22.991.991

Language: English

Publisher: American Society of Hematology

Publication Date: 2016

detail.hit.zdb_id: 1468538-3

detail.hit.zdb_id: 80069-7

In: Blood, American Society of Hematology, Vol. 122, No. 21 ( 2013-11-15), p. 1974-1974

Abstract: Bendamustine, a bi-functional alkylating agent comprising a purine-like benzimidazole ring an a nitrogen mustard group, exerts a peculiar mechanism of action if compared to most conventional alkylators and this may partially explain its effectiveness in alkylator-resistant cells. In patients with MM several studies demonstrated the efficacy and tolerability of bendamustine as monotherapy or in combination with new drugs, particularly bortezomib that was found to enhance the in vitro sensitivity of MM cells to bendamustine. These observations represented the rationale for our protocol design namely to evaluate the combination bendamustine (70 mg/m2 days 1, 8), bortezomib (1.3 mg/ m2 days 1, 4, 8, 11) and dexamethasone (20 mg days 1-2, 4-5, 8-9, 11-12) (BVD). Cycles were administered every 4 weeks up to four cycles. Patients achieving a response less than a PR were taken off-study. Patients obtaining at least a PR received two additional treatment cycles followed by a 12-months consolidation phase with cycles repeated every 2 months. Therefore, patients with a PR after the induction phase could receive up to 18 months of treatment and up to 12 cycles of BVD. Patients with relapsed/refractory MM of any age, with adequate cardiac, liver and hematological function, not refractory to bortezomib and treated with no more than four previous lines of therapy were enrolled in this prospective, single-arm, open-label, phase II study conducted in 21 Italian centres. The primary endpoint was achievement of a response at least PR after four cycles of BVD and response was assessed according to to IMWG criteria. From March 2011 to June 2012, 75 patients were included. Median age was 68 years (range 41-85), 26.5% had ISS stage 3, 19% IgA myeloma and 9% renal failure. In total, 8 of 36 evaluable patients (22%) had adverse cytogenetics. All patients had received prior treatment with new drugs, including targeted agents such as thalidomide (57%), lenalidomide (54.5%) or bortezomib (46.5%). Patients had received a median of one prior line of therapy (range 1-4), including alkylators (69%), anthracyclines (29%) and ASCT (44%). Twenty-four patients (32%) were refractory to IMIDs. The response rate ≥ PR after four cycles of BVD was 71.5%, including 11 patients with CR (16%), 13 VGPRs (18.5%) and 26 PRs (37%). Also, 14 patients (20%) had disease stabilization while 6 (8.5%) had progressive disease. Median time to response was 1.2 months (range 0.9-1.4 months). Only prior treatment with bortezomib significantly reduced the response rate ≥ PR (54.5% vs 86.5%; P = 0.003). At a median follow-up of 12 months (range 6-24), 30 patients had progressed and 18 had died. Median TTP and PFS were 16.5 months and 15.5 months, respectively while median OS had not been reached and 78% of patients were alive at 1 year. The Cox regression analysis identified prior therapy with bortezomib plus lenalidomide as the only factor that significantly reduced TTP (9 vs 17 months; HR = 4.5; 95% CI = 1.7-12.3; P = 0.005) Grade 3-4 adverse events occurred in 55% of patients leading to therapy reduction in 20% and to protocol discontinuation in 10.5% of patients. The most frequent severe adverse events were thrombocytopenia (30.5%), neutropenia (18.5%), infections (12%), peripheral neuropathy (8%), gastrointestinal and cardiovascular events (both 6.5%). Compared with younger, patients aged 〉 70 years had a significantly higher incidence of grade 3-4 thrombocytopenia (22% vs 37%; p=0.042) and severe infections (7 vs 19%; p=0.047) and consequently a higher rate of therapy reduction (9% vs 34.5%; p=0.007) and therapy discontinuation (7% vs 15.5%; p=0.043). Moreover, 4/5 early deaths occurred in patients aged more than 70 years. BVD combination is an effective regimen in relapsed-refractory MM patients since it elicits rapid, high ( 〉 70%) and good quality of response (more than a third of patients achieved CR + VGPR). Moreover, BVD combination is a feasible and well tolerated regimen provided that adapted therapy and adequate antibiotic prophylaxis are employed in patients older than 70 years. Disclosures: Offidani: Mundipharma: Honoraria, Research Funding. Off Label Use: Bendamustine.

Type of Medium: Online Resource

ISSN: 0006-4971 , 1528-0020

URL: Article

DOI: 10.1182/blood.V122.21.1974.1974

Language: English

Publisher: American Society of Hematology

Publication Date: 2013

detail.hit.zdb_id: 1468538-3

detail.hit.zdb_id: 80069-7

In: Blood, American Society of Hematology, Vol. 122, No. 21 ( 2013-11-15), p. 3126-3126

Abstract: The quality of response and the residual disease after treatment are important prognostic factors in several hematological diseases including multiple myeloma (MM). Several papers demonstrated that the deeper the response after treatment, the longer the survival. However few data are available on the monitoring of minimal residual disease (MRD) during the maintenance therapy in transplant eligible MM patients. Aims to evaluate the role of maintenance therapy in reducing MRD and the role of monitoring the response to predict clinical relapse. Patients and Methods newly diagnosed MM patients enrolled in the RV-MM-EMN-441 trial (NCT01091831) and achieving at least a very good partial response (VGPR) after consolidation were included in the study. Patients received 4 Lenalidomide-Dexamethasone (RD) courses as induction, Cyclophosphamide to mobilize bone marrow stem cells (BMSC) and then were randomized to receive 6 cycles of Cyclophosphamide-Lenalidomide-Dexamethasone (CRD) or Autologous Stem Cell Transplantation (ASCT) with Melphalan 200 mg/m2. All patients received maintenance therapy with Lenalidomide (R) or Lenalidomide-Dexamethasone (RD) until relapse. MRD analysis was performed in a single laboratory (University of Turin, Italy) using flow cytometry according to European Myeloma Network guideline (Rawstron AC, Haematologica 2008). Samples of bone marrow (BM) were collected at diagnosis, after consolidation, after 3 and 6 courses of maintenance and then every 6 months until clinical relapse. The samples were considered MRD +ve if ≥ 0.01% of PC were detected. Immunophenotypic (IF) relapse was defined as an increase of ≥ 25% in the amount of malignant plasma cells in BM compared to the previous determination. Results Fifty patients (27 female/23 male) with a median age of 57 yrs (40-65) entered the study. According to ISS, 27 patients were stage I, 15 stage II and 8 stage III. Fish risk profile was standard in 31 patients, high in 11 and not available in 8. Twenty-five patients received CRD as consolidation and 25 underwent ASCT. The median follow-up was 28.6 months. After consolidation 16 (32%) patients achieve a complete response (CR) and 34 (68%) a VGPR. MRD was negative in 19/48 (40%) patients, of which 12 received ASCT (out of 23, 52%) and 7 received CRD (out of 25, 28%). Patients receiving ASCT showed a lower value of residual cells (median 0.08%, range 0 – 1.00) compared to patients receiving CRD (median 0.5%, range 0 – 2.9%, p=0.0134). The lower MRD value was achieved after consolidation in 31 patients (62%), after 3 courses of maintenance in 6 patients (12%) and after 6 or more courses of maintenance in 13 patients (26%). The increase in quality of response was observed primarily in patients receiving CRD: the average amount of residual plasma cells in bone marrow was 71/uL after induction, lowering to 51/uL after 6 and 12 courses of maintenance therapy. Nine patients clinically relapsed after an average time of 25.6 months from the beginning of the therapy and in all patients this was anticipated by immunophenotypic relapse. Conclusion 1) consolidation therapy with ASCT determines a deeper response compared to CRD; 2) maintenance therapy can improve the quality of response, in particular in patients not receiving ASCT; 3) Immunophenotypic relapse anticipate the clinical relapse. These results suggest the possible role of MRD monitoring to better assess the response to therapy also during maintenance and as marker of early relapse. Disclosures: Ladetto: Celgene: Research Funding, Speakers Bureau; Janssen Cilag: Research Funding, Speakers Bureau; Mundipharma: Research Funding, Speakers Bureau; Roche: Research Funding, Speakers Bureau; Amgen: Research Funding, Speakers Bureau. Boccadoro:Celgene: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen Cilag: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding. Palumbo:Amgen: Consultancy, Honoraria; Bristol-Myers Squibb: Consultancy, Honoraria; Janssen: Consultancy, Honoraria; Millenium: Consultancy, Honoraria; Onyx: Consultancy, Honoraria.

Type of Medium: Online Resource

ISSN: 0006-4971 , 1528-0020

URL: Article

DOI: 10.1182/blood.V122.21.3126.3126

Language: English

Publisher: American Society of Hematology

Publication Date: 2013

detail.hit.zdb_id: 1468538-3

detail.hit.zdb_id: 80069-7

In: Clinical Lymphoma Myeloma and Leukemia, Elsevier BV, Vol. 19, No. 10 ( 2019-10), p. e271-

Type of Medium: Online Resource

ISSN: 2152-2650

URL: Article

DOI: 10.1016/j.clml.2019.09.447

Language: English

Publisher: Elsevier BV

Publication Date: 2019

detail.hit.zdb_id: 2540998-0

detail.hit.zdb_id: 2193618-3

In: Blood Cancer Journal, Springer Science and Business Media LLC, Vol. 11, No. 12 ( 2021-12-07)

Type of Medium: Online Resource

ISSN: 2044-5385

URL: Article

DOI: 10.1038/s41408-021-00590-5

Language: English

Publisher: Springer Science and Business Media LLC

Publication Date: 2021

detail.hit.zdb_id: 2600560-8

In: Blood Cancer Journal, Springer Science and Business Media LLC, Vol. 10, No. 5 ( 2020-05-18)

Type of Medium: Online Resource

ISSN: 2044-5385

URL: Article

DOI: 10.1038/s41408-020-0326-1

Language: English

Publisher: Springer Science and Business Media LLC

Publication Date: 2020

detail.hit.zdb_id: 2600560-8