GLORIA

GEOMAR Library Ocean Research Information Access

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Material
Language
  • 1
    In: Blood, American Society of Hematology, Vol. 122, No. 21 ( 2013-11-15), p. 1347-1347
    Abstract: To aid in the identification of effective treatments for individual patients, ex vivo assays for detecting cell death inducible by drugs for hematological malignancies have been in development for over 20 years. We have developed a novel approach incorporating 4 key innovations; incubating drugs in whole bone marrow sample without isolating leukocytes, using flow cytometry enables identification of the malignant cells selectively, an automated flow cytometry-based platform (ExviTech) decreases errors and enables full pharmacological characterization, and analyzing the data using pharmacodynamic population models. Aim The purpose of this study is to derive the ex vivo pharmacological profiles across the AML patient population of single drugs and combination treatments as a tool for individualized treatment selection. Patients and Methods Bone-marrow samples from 160 patients diagnosed with AML were sent to Vivia from 24 hospitals across Spain within 24 hrs. The plates were incubated for 48-hours prior to analysis with ExviTech, The percentage of leukemic cell death was determined via labeling with monoclonal antibodies and AnnexinV-FITC. A survival index is computed for each drug, the lower the survival index, the more effective the drug. Dose-response curves of cytarabine, idarubicin, daunorubicine, etoposide, mitoxantrone, fludarabine, clofarabine, and 6-thioguanine were measured in 160 patient samples. The added benefit of combining these drugs into 12 combination treatments was assessed by measuring their synergy in each individual patient. In 39 patients treated with CYT IDA we had clinical data of response, and then we performed a blinded interpretation of this in vitro test by an expert hematologist, to predict the clinical response based in this test result. Results There was a large range of interpatient variability in the response to a single drug and even larger in the synergism between drugs. The Population Pharmacological Profiles for an individual patient is shown on the figure below. The relative drug potency in terms of their percentile ranking within the population is shown in the left panel from 0 (weakest) to 100 (most potent). Green lines represent the individual patient potency relative to the population ranking, with confidence intervals. Third column lists when a drug leaves a significant % of leukemic cells alive, potential resistant clones. The panel on the right side shows the synergism of the drug combinations treatments shown as box-plots at 10-25-75-90% to highlight their distribution. The synergism value for an individual patient in each combination is shown in green, with confidence interval as parallel dotted green lines. This representation of the Pharmacological Profile of an individual patient sample quickly identifies extreme values, when a drug or combination is very sensitive (rightward shift green lines, green boxes) or very resistant (leftward shift green lines, red boxes). This patient showed average sensitivities for most drugs though highly resistant to Clofarabine (red box) that leaves 45% alive. However this patient showed lack of synergism in multiple treatments (right, red boxes). CYT and IDA show average potencies but lack of synergism, suggesting CYT-DAU might be a more efficient treatment. These representations lead to clear guidelines in 〉 90% samples, and based on hematologist's interpretation of these guidelines show a clinical correlation with clinical responses to CYT-IDA of 84%. Conclusion We have developed an improved a methodology to measure the pharmacological activity of drugs and drug combinations in AML patient samples as well as modeling their pharmacological behavior. This information may be useful in selecting the optimal treatment for the individual patient, especially relapse/refractory patients in need of therapeutic alternatives. By testing the drugs used in the treatment protocols for AML directly on patient samples, a pharmacological based model has been developed to infer drug resistance or sensitivity, patient by patient. Disclosures: Ballesteros: Vivia Biotech: Equity Ownership. Primo:Vivia Biotech: Employment. Hernandez-Campo:Vivia Biotech: Employment. Rojas:Vivia Biotech: Employment. Liebana:Vivia Biotech: Employment. Lopez:Vivia Biotech: Employment. Iñaki:Vivia Biotech: Consultancy. Bennett:Vivia Biotech: Employment.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2013
    detail.hit.zdb_id: 1468538-3
    detail.hit.zdb_id: 80069-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    In: Blood, American Society of Hematology, Vol. 122, No. 21 ( 2013-11-15), p. 5340-5340
    Abstract: Multiple myeloma (MM) is a heterogeneous disease. Evaluation of prognostic factors and risk stratification at diagnosis is necessary to compare outcome. Attempts have been made to apply a comorbidity score in the clinical sitting, but a standardized general approach is still lacking. We hypothesized that a comprehensive examination of every associated disease in a large cohort of patients could better highlight the prognostic impact of comorbidity in MM. All consecutive patients diagnosed in our institution, from 1993 to 2013, with symptomatic MM according to IMWG criteria were included in our population-based MM registry. Patients with plasma cell leukemia or with palliative management were excluded. Clinical variables analyzed were: age, sex, Durie-Salmon, International Scoring System (ISS), percentage of plasma cell in bone marrow by morphology (PC), serum creatinine (Cr) and estimated glomerular filtration rate according with Modification of Diet in Renal Disease (eGFR-MDRD). The following comorbodities were analysed: hypertension (HTA), diabetes (DM), obesity (OB) (body mass index 〉 30 Kg/m2), hyperlipaemia (HL), prior malignancy (PM), hepatitis B virus (HBV), hepatitis C virus (HCV), human immunodeficiency virus (HIV), peptic ulcer (PU), thromboembolism (TE), renal transplant (RT), splenectomy (S), cutaneous disease (CD), amyloidosis (AM), heart disease (HD) (arrhythmia, congestive heart failure, coronary artery disease, other), lung disease (LD) (chronic obstructive pulmonary disease, asthma, other), liver disease (HE) (cirrhosis, non-alcoholic fatty liver disease, other), neurological disorder (ND), psychiatric disorder (PD) and rheumatologic disorder (RD). Kaplan-Meier method was used to estimate OS curves. Cox regression was used to determine the prognostic impact of each comorbidity in a univariate and multivariate model. 311 patients were eligible. Median age was 66 years (12-91), 148 men (47.6 %) and 163 women. Percentage of comorbidities was: HTA 45; OB 32.5; DM 20.4; HD 20.4; LD 15.2; PU 10; HL 9.7; ND 8; PM 7.8; PD 6.5; HBV 3.9; HE 3.9; TE 3.6; RD 3,5; AM 2.3; HCV 1.9; CD 1.6; S 1; RT 0.6; HIV 0.3. 63 patients (20.4 %) showed no comorbidities. Univariate analysis (table 1) demonstrated that AM (P=0.022), HCV (0.038), HIV (0.022), PD (0.015) and ND (0.05) were significantly associated with shorter OS. The variables associated with mortality in the multivariate analysis were age (p=0.002), ISS (III vs I: p=0.01), PC (p=0.05) and Cr (p=0.02). Results will be validated in another MM series and presented during the meeting. The overall prognosis of MM depends on a variety of host and disease-related characteristics. We confirm age, ISS, PC and Cr as robust and independent prognostic factors. Adjusting for these factors, no isolated comorbidity reach statistical significance; however, comorbidity seems to have a role in MM prognosis. More studies are warranted to define the prognostic impact of comorbidities in MM. Disclosures: No relevant conflicts of interest to declare.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2013
    detail.hit.zdb_id: 1468538-3
    detail.hit.zdb_id: 80069-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    In: Blood, American Society of Hematology, Vol. 122, No. 21 ( 2013-11-15), p. 1329-1329
    Abstract: The Wilms' tumor 1 (WT1) gene, located on chromosome 11p13, encodes a transcription factor with both oncogene and tumor suppressor functions. WT1 is reportedly overexpressed in 90% of patients with acute myeloid leukemia (AML) and thus can be used for minimal residual disease (MRD) monitoring by quantitative RT-PCR. The aim of the present study was to analyze the usefulness of WT1 as a marker for MRD in AML after chemotherapy and as a predictor of relapse and survival. Patients and Methods This retrospective and multicentric study included 114 patients with WT1-overexpressed AML (Table 1). Quantitative assessment of WT1 transcript levels was performed by quantitative RT-PCR in 283 bone marrow (BM) samples at diagnosis, post-induction and post-consolidation. WT1 gene expression was calculated by relative quantification using the normalized ratio of the target gene (WT1) related to a reference gene (GUS) and using cell line K562 as calibrator. Inter-laboratories methodological standardization was accomplished through a pilot study with 10 BM donor samples, 20 BM patient samples and commercial WT1 plasmids (ProfileQuant Kit, Ipsogen-Qiagen). Results No significant differences in WT1 gene expression (cycle threshold, Ct) were observed between different laboratories in the pilot study. The cut-off value of WT1 over-expression in BM was established in 0.55% (median+2SD values from healthy donors). Median WT1 expression in patient samples at diagnosis was 29.5% (range, 2-1220). Differential expression at diagnosis was not correlated with age, sex, leukocytes, karyotype (risk), however a higher expression in patients with AML-M1 and AML-M2 subtypes as well as patients with mutant NPM1 and/or ITD-FLT3 was observed. Most patients (88.6%; 101/114) received intensive chemotherapy as induction treatment. After induction, 80.2% (81/101) of patients had available WT1 data, of which 23.45% (19/81) were positive. In addition, 79.8% (91/114) received intensive treatment during consolidation. WT1 results were available for 75.5% (66/91), of which 22.7% (15/66) were positive. Post-induction WT1 positivity was correlated with a higher cumulative incidence of relapse (CIR; 2 years 76% vs. 28.2% p=0.002) and a lower overall survival (OS; 2 years, 44.9% vs. 78.2% p=0.022; Figure 1a,b). Similar results were obtained when patients intensified with allogeneic stem cell transplantation (allo-SCT) were excluded from the analysis: higher CIR (2 years 88.9% vs. 32.5%; p=0.005) and lower OS (40% vs. 76.2% p=0.17). Post-consolidation WT1 positivity was correlated with a trend to a higher CIR (2 years 60.3% vs. 41.4% p=0.21) and a lower OS (2 years 44.9% vs. 66% p=0.09; Figure 1c,d). Statistically significant results were obtained after consolidation when patients treated with allo-SCT were excluded from the analysis: higher CIR (2 years 100% vs. 40.1% p=0.005) and lower OS (2 years 20% vs. 66% p=0.003). Conclusions WT1 is a useful marker for MRD in AML patients undergoing chemotherapy (induction and consolidation) which allows anticipation of relapse and survival. Post-induction results were a strong risk factor of relapse and survival in all patients, including those intensified with allo-SCT. By contrast post-consolidation results are especially relevant in the group of patients not treated with allo-SCT. Intensification with allo-SCT overcomes the poor prognosis derived from positive post-consolidation WT1 results. Paper presented on behalf of the Hematological Molecular Biology Group (GBMH) of the Spanish Society of Hematology (SEHH). Disclosures: No relevant conflicts of interest to declare.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2013
    detail.hit.zdb_id: 1468538-3
    detail.hit.zdb_id: 80069-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    In: Blood, American Society of Hematology, Vol. 120, No. 21 ( 2012-11-16), p. 2924-2924
    Abstract: Abstract 2924 Background: Clonal composition and clone dynamic changes of neoplasms are a controversial issue, whose investigation is now facilitated by the development of massive parallel sequencing. Here we have analyzed the changes in the mutational spectrum associated with progression, treatment response and relapse in a multiple myeloma patient. We sequenced exomes for the primary quiescent-tumor, the progression and the relapsed samples. M & M: Patient and samples description Samples from asymptomatic, progression and relapse phases were compared by FISH and Whole exome massive parallel sequencing in a multiple myeloma patient carrying the t(4;14)(p16.3;q32) alteration. At relapse the cytogenetic study identified the presence of two major clones, 13q14 deletion and t(4;14)(p16.3;q32) in the 60% of the cells, and 17p13 deletion in the 12% of the cells. Whole exome sequencing was performed at CNAG (Barcelona, Spain) following standard protocols for high-throughput paired-end 76pb sequencing on the Illumina HiSeq2000 instruments (Illumina Inc., San Diego, CA). The variant calling was performed using an in house written software calling potential mutations showing a minimum independent multi-aligner evidence. Results: We performed whole exome sequencing on 3 tumor samples from the same patient: the first one at the time of diagnosis correspond to bone marrow infiltrated by 7% of plasma cells. The two additional samples, at progression and relapse, were done in CD138+ bone marrow cells, at this moment the percentage of infiltration was of 84% and 64% respectively. The germinal DNA from the same patient was used as reference. The mean coverage obtained for the four samples were 93x, with around 85% of bases with at least 20X coverage. After filtering, a total of 104 single nucleotide variations (SNV) were identified, some of them in more than one sample. The variations were classified into silent (25), missense (71), nonsense (6), and essential splice (2), according to their potential functional effect. In addition to t(4;14) and del13q14, progression and relapse samples shared 36 common SNVs. There were also some variants gained and/or loss in the different time points, suggesting the presence of at least five different clones, independent but related in their evolution. The two main clones were present in progression and relapse samples, but the ratio of the mutant alleles decreased in parallel to the decrement in the percentage of cells carrying on the described cytogenetic alterations Conclusions: There is a coupling between the cytogenetic and tumor sequence changes indicating that tumor at progression was composed by a dominant clone, together with multiple minor clones. Relapse after treatment was associated with multiple changes in the clone dynamics, progressive reduction of the main clone, emerging of new subclones and lost of minor clones. Dynamic changes along progression could be facilitated/induced by the therapy received. Disclosures: No relevant conflicts of interest to declare.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2012
    detail.hit.zdb_id: 1468538-3
    detail.hit.zdb_id: 80069-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    Online Resource
    Online Resource
    ClinMed International Library ; 2018
    In:  Journal of Genetics and Genome Research Vol. 5, No. 1 ( 2018-12-31)
    In: Journal of Genetics and Genome Research, ClinMed International Library, Vol. 5, No. 1 ( 2018-12-31)
    Type of Medium: Online Resource
    ISSN: 2378-3648
    URL: Issue
    Language: Unknown
    Publisher: ClinMed International Library
    Publication Date: 2018
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 6
    In: Clinical Lymphoma Myeloma and Leukemia, Elsevier BV, Vol. 22 ( 2022-08), p. S24-S25
    Type of Medium: Online Resource
    ISSN: 2152-2650
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 2540998-0
    detail.hit.zdb_id: 2193618-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 7
    In: Haematologica, Ferrata Storti Foundation (Haematologica), Vol. 106, No. 9 ( 2020-07-30), p. 2325-2333
    Abstract: In cases of treatment failure in acute myeloid leukemia (AML), the utility of mutational profiling in primary refractoriness and relapse is not established. We undertook a perspective study using next-generation sequencing (NGS) of clinical follow-up samples (n=91) from 23 patients with AML with therapeutic failure to cytarabine plus idarubicin or fludarabine. Cases of primary refractoriness to t reatment were associated with a lower number of DNA variants at diagnosis than cases of relapse (median 1.67 and 3.21, respectively, p=0.029). The most frequently affected pathways in patients with primary refractoriness were signaling, transcription and tumor suppression, whereas methylation and splicing pathways were mainly implicated in relapsed patients. New therapeutic targets, either by an approved drug or within clinical trials, were not identified in any of the cases of refractoriness (0/10); however, 8 potential new targets were found in 5 relapsed patients (5/13) (p=0.027): 1 IDH2, 3 SF3B1, 2 KRAS, 1 KIT and 1 JAK2. Sixty-five percent of all variants detected at diagnosis were not detected at complete response (CR). Specifically, 100% of variants in EZH2, RUNX1, VHL, FLT3, ETV6, U2AF1, PHF6 and SF3B1 disappeared at CR, indicating their potential use as markers to evaluate minimal residual disease (MRD) for follow-up of AML. Molecular follow-up using a custom NGS myeloid panel of 32 genes in the post-treatment evaluation of AML can help in the stratification of prognostic risk, the selection of MRD markers to monitor the response to treatment and guide post-remission strategies targeting AML, and the selection of new drugs for leukemia relapse.
    Type of Medium: Online Resource
    ISSN: 1592-8721 , 0390-6078
    Language: Unknown
    Publisher: Ferrata Storti Foundation (Haematologica)
    Publication Date: 2020
    detail.hit.zdb_id: 2186022-1
    detail.hit.zdb_id: 2030158-3
    detail.hit.zdb_id: 2805244-4
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 8
    In: Clinical Lymphoma Myeloma and Leukemia, Elsevier BV, Vol. 22 ( 2022-08), p. S30-S31
    Type of Medium: Online Resource
    ISSN: 2152-2650
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 2540998-0
    detail.hit.zdb_id: 2193618-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 9
    In: Clinical Lymphoma Myeloma and Leukemia, Elsevier BV, Vol. 22 ( 2022-08), p. S97-S98
    Type of Medium: Online Resource
    ISSN: 2152-2650
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 2540998-0
    detail.hit.zdb_id: 2193618-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 10
    In: Blood, American Society of Hematology, Vol. 122, No. 21 ( 2013-11-15), p. 1973-1973
    Abstract: Initial results of the Spanish GEM2005mas65 phase III trial comparing VMP versus VTP as induction therapy in elderly patients with newly diagnosed MM did not show any difference in terms of OS or PFS. The purpose of this study was to update clinical results with a longer follow-up. Secondary objectives were to know the patterns of symptomatic relapse and response to therapy in patients previously exposed to novel agents. Methods GEM2005mas65 trial lasted from March, 2006, and October, 2008. Overall, 260 patients with untreated MM, 65 years and older, from 63 Spanish centres, were randomly assigned to receive six cycles of VMP (n=130) or VTP (n=130) as induction therapy followed by maintenance therapy with bortezomib plus prednisone (n=87) or bortezomib plus thalidomide (n=91). Results With a median follow-up of 53.2 months, median OS of the entire cohort of patients was 42.45 months. Median OS was 62 months in patients receiving VMP versus 42.6 months in patients receiving induction with VTP (P = 0.045) (Figure 1). No differences were observed in PFS, being 31 and 24.4 months in the VMP and VTP groups, respectively. At the time of the study, 167 patients had relapsed or progressed and 92 of them received some kind of post relapse treatment. Front-line therapy and clinical and biological characteristics at the time of relapse in this subgroup of patients are summarized in Table 1. Initial induction treatment consisted of VMP in 40 (43.4%) patients and VTP in 52 (56.5%) patients. Overall, after induction and maintenance therapy 66 (71.7%) patients had been exposed to bortezomib and thalidomide and 26 (28.2%) patients received bortezomib-based therapy without immunomodulatory agents before relapse. At symptomatic relapse, median age was 74 years (range 65-87) and 43 (46.7%) were male. Serum creatine level 〉 2 mg/dL was present in 11.9% of the patients and 4.3 % had hypercalcemia. Extramedullary disease and plasma cell leukemia was present in 17% and 4.4% of patients, respectively. Finally, severe bone disease was observed in 39 the patients. Management of relapse was very heterogeneous. Subsequent drugs used in first clinical relapse included lenalidamide combinations in 40 (43.4%) patients, bortezomib-based therapy in 19 (20.5%) patients, different chemotherapy combinations in 25 (27.1%) patients and bendamustine-prednisone in 2 (2.1%) patients. Six (6.5%) patients received only supportive at time of first relapse. Overall, 45 (52%) patients achieved partial response or better after rescue therapy. Response rates were higher after lenalidomide-based therapy (62.5%) when compared with bortezomib (42.1%) and conventional chemotherapy-based regimens (40.7%),although this difference did not translate into significant PFS advantage. After a median follow-up of 16.4 months (range 0-50.2) from clinical relapse,58 (63%) patients had died. Median PFS and OS were 10 (CI95%; 10.7-50.2) and 15.6 months (CI95%; 8.5-16.5%), respectively. In patients initially treated with VMP (n = 40) and VTP (n =52) median survival from start of subsequent therapy was 15.6 and 15.4 months, respectively. Among characteristics at relapse, only ISS stage had an impact on survival (P= 0.03).There was no difference in OS or PFS from front-line induction and/or maintenance therapies or salvage therapy. Conclusions This updated analysis of the GEM2005mas65trial shows a survival advantage of the VMP arm when compared with patients receiving VTP. Patterns of relapse were similar regardless previous induction and maintenance therapy. Finally, and when analyzing the subgroup of patients receiving active therapy at relapse, only ISS stage seemed to have a prognostic impact on OS. Group A: VMP, group B : VTD Disclosures: Mateos: Janssen, Celgene, Onyx, Millennium, Mundipharma: Honoraria. Oriol:Celgene: Consultancy. Off Label Use: Bendamustine, bortezomib and prednisone is a combination not approved for newly diagnosed myeloma patients.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2013
    detail.hit.zdb_id: 1468538-3
    detail.hit.zdb_id: 80069-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...