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
  • 1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    In: Blood, American Society of Hematology, Vol. 114, No. 22 ( 2009-11-20), p. 2778-2778
    Abstract: Abstract 2778 Poster Board II-754 Introduction: Interstitial deletions involving the long arm of chromosome 5, one of the good prognostic factors, are the most common chromosomal abnormality either as a sole or in combination with other abnormalities in myelodysplastic syndromes (MDS). However, the prognostic impact of del(5q) accompanied by additional chromosome abnormalities remains controversial. We investigated the hematologic, cytogenetic and prognostic features of del(5q) in MDS. Also, we mapped the deleted region on 5q by fluorescence in situ hybridization (FISH), whether the difference of deleted region between 5q- syndrome and MDS with del(5q) accompanied by additional abnormalities makes the clinical and prognostic differences. Methods: 137 adult patients, newly diagnosed as de novo MDS in Seoul National University Hospital from April 2000 through March 2009, were enrolled. We reclassified MDS subtypes according to WHO classification 2008. To compare the hematologic, cytogenetic and prognostic features according to presence of del(5q), we categorized the patients with del(5q) into 3 groups: patients with additional chromosomal abnormalities with del(5q) as 'MDS with del(5q)'; patients with other chromosomal abnormalities other than del(5q) as 'MDS with other chromosomal abnormalities (CA)'; and patients with isolated del(5q) as '5q- syndrome'. Also, the mapping with FISH for EGR1, CSF1R, and PDGFRβ on 5q, was performed in conjunction with G-banding to all patients and additional 16 patients with alleged del(5q) by G-banding from Korean MDS working party. Results: According to the new WHO classification of 2008, the 33 refractory anemia patients according to the previous WHO classification of 2001 were reclassified into refractory cytopenias with unilineage dysplasia (13 patients), refractory cytopenia with multilineage dysplasia (six patients) and MDS - unclassified (14 patients) (Fig 1). The median age of Korean MDS was 59 years, and the frequencies of 5q- syndrome and 5q deletion was 2.2% (3/137 patients) and 15.3%, respectively. Among 137 patients, 17 patients were grouped into 'MDS with del(5q)', and 53 patients into 'MDS with other CA'. The 'MDS with del(5q)' were significantly older and showed higher % of blasts in PB and BM than 'MDS with other CA'. And, they were categorized into higher risk group according to the International Prognostic Scoring System (IPSS) (Table 1). As a results of mapping for EGR1, PDGFRβ and CSF1R, deletion of all 3 regions was 93.3% in patients of 'MDS with del(5q)' and 66.7% in patients of '5q- syndrome', showing no difference in deleted genes between the two groups. Half (53%) of patients of 'MDS with del(5q)' accompanied complex abnormalities including chromosome 7 abnormalities. The del(5q) was detected only by FISH, showing discrepant results between G-banding and FISH analysis. Especially, marker chromosomes by G-banding in some patients were proved to be chromosome 5 with del(5q) by FISH. Conclusion: The biologic and prognostic features of MDS in Korea seem to be markedly different from those of Caucasian; younger age and low frequency of 5q- syndrome. The incidence of complex cytogenetic abnormalities including del(5q) was higher than that of Caucasian, while that of isolated del(5q) was quite low in Korea, which can explain that higher proportion of MDS with del(5q) belongs to higher risk IPSS group. And, we suggest FISH for del(5q) at initial diagnosis and during follow-up after treatment of MDS with alleged del(5q), since the presence of del(5q) in MDS is important for choosing the lenalidomide treatment. 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: 2009
    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. 128, No. 22 ( 2016-12-02), p. 5432-5432
    Abstract: Introduction Chromosomal translocations are rare in myelodysplastic syndrome (MDS) and their impact on overall survival (OS) and response to hypomethylating agents (HMA) is unknown. Methods The prognostic impact of the revised International Prognostic Scoring System (IPSS-R) and for chromosomal translocations was assessed in 751 patients from the Korea MDS Registry. Patients with secondary MDS, chronic myelomonocytic leukaemia, and patients with AML and a BM blast count of 20-30% who were classified as having refractory anaemia with excess blast (RAEB)-t according to the French-American-British classification were excluded. Cytogenetic aberrations were counted following the International Working Group on MDS Cytogenetics (IWGMC) consensus guidelines. Complex karyotype (CK) was defined as having 3 or more chromosomal abnormalities. Monosomal karyotype (MK) was defined as the presence of 2 or more autosomal monosomies or 1 single autosomal monosomy in combination with structural abnormalities. Results The median age of the patients was 65 years, and 457 (61.9%) were male. The median follow-up time was 71.7 months for survivors (range, 0.1 - 230.5). The most common WHO subtype was refractory cytopaenia with multilineage dysplasia (29.7%), followed by RAEB-1 (19.8%), RAEB-2 (18.4%), refractory cytopaenia with unilineage dysplasia (15.4%), and MDS-unclassifiable (11.9%). More than half of patients received disease-modifying treatment; 381 (50.7%) received hypomethylating agents (HMAs), and 83 (11.1%) received haematopoietic stem cell transplantation (HSCT). IPSS-R effectively discriminated patients according to leukaemia evolution risk and OS. We identified 40 patients (5.3%) carrying translocations. Among these, 46 translocations involving 72 breakpoints were identified including balanced translocations in 13 (28.3%) and unbalanced translocation in 33 (71.7%). Translocations were found as a part of CK in 30/46 cases (65.2%) and as a part of MK in 21/46 (45.7%). Frequently involved chromosomes were chromosome 7 (n = 13); ch1 (n = 12); ch5 (n = 9); ch12 (n = 6); ch6, ch11, and ch14 (n = 5); ch10 and ch20 (n = 4); and ch16, ch17, and X (n = 3) in decreasing order. To the best of our knowledge, 43 (93.5%) of the 46 translocations have not been previously described in MDS, nor in AML or CMML. Patients with translocation also had a higher percentage of BM blasts and included a significantly larger proportion of RAEB-1 and RAEB-2. Translocation presence was associated with a shorter OS (median, 12.0 versus 79.7 months, P 〈 0.01), and multivariate analysis demonstrated that translocations (hazard ratio [HR] 1.64 [1.06-2.63] ; P = 0.03) as well as age, sex, IPSS-R, and CK were independent predictors of OS. In the IPSS-R high and very high risk subgroup (n = 260), translocations remained independently associated with OS (HR 1.68 [1.06-2.69], P = 0.03) whereas HMA treatment was not associated with improved survival (median OS, 20.9 versus 21.2 months, P = 0.43). However, translocation carriers exhibited enhanced survival following HMA treatment (median 2.1 versus 12.4 months, P = 0.03). Conclusion Our data suggest that chromosomal translocation is an independent predictor of adverse outcome and has an additional prognostic value in discriminating patients with MDS having higher risk IPSS-R who could benefit from HMA treatment. Further studies in other populations are needed to validate the clinical relevance of translocation in patients with MDS. Disclosures Lee: Amgen: Membership on an entity's Board of Directors or advisory committees.
    Type of Medium: Online Resource
    ISSN: 0006-4971 , 1528-0020
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Hematology
    Publication Date: 2016
    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: British Journal of Haematology, Wiley, Vol. 161, No. 3 ( 2013-05), p. 339-347
    Type of Medium: Online Resource
    ISSN: 0007-1048
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 1475751-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    In: Blood, American Society of Hematology, Vol. 124, No. 21 ( 2014-12-06), p. 4195-4195
    Abstract: Background: Uncontrolled complement activation has a major role in the pathogenesis of atypical HUS (aHUS) and the restraint of this process by eculizumab is life saving. However, the evidence of complement dysregulation in the pathogenesis of Thrombotic Thrombocytopenic Purpura (TTP) is still unclear. In this study we examined the presence of complement activation biomarkers in patients with aHUS and TTP and the levels were compared to normal healthy controls . Patients and Methods: Patients with thrombotic microangiopathic thrombocytopenia diagnosed either as TTP with low ADAMTS13 activity less than 10% or aHUS with impaired renal function, Cr 〉 2mg/dL and normal ADAMTS13 activity were chosen from the Korean TTP registry from February 2012 to June 2014. Prospective plasma and serum samples prior to intervention were collected from newly diagnosed patients with TTP (n=20), aHUS (n=20), and 20 healthy controls and frozen at -700C. Complement activation products (C3a, Bb as alternative pathway; C4d as classic pathway; C5a, C5b-9; terminal pathway) were measured by ELISA. Results: Significantly increased levels of Bb and C5b-9 were observed in TTP (median [range], ng/mL; Bb, 1220 [540.0 – 16560] , p=0.048; C5b - 9, 390.1 [238.5 - 938.7], p 〈 0.0001) when compared with controls (Bb, 870.0 [630.0 - 2070]; C5b - 9, 190.8 [77.96 - 458.9] ). Increased levels of C3a, C5a, C5b - 9, and Factor Bb were observed in HUS (C3a, 231.3 [80.70 - 791.8], p 〈 0.0001; C5a, 21.38 [5.590 - 34.96], p= 0.006; C5b - 9, 0.49 [0.21 - 1.41] , p 〈 0.0001; Bb, 1490 [540.0 – 11800], p= 0.0003) as compared with controls (C3a, 108.7 [30.98 - 425.1] ; C5a, 8.620 [2.660 - 26.93]; C5b - 9, 0.49 [0.21 - 1.41] ; Bb, 870.0 [630.0 - 2070]). These suggested alternative and terminal complement pathways were activated in initial episodes of TTP or HUS. However levels of C4d were not different in HUS and TTP as compared with controls which suggested classic complement pathways were not important in this process. There were no significant differences in complement levels between TTP and HUS although levels of C3a, C4d, C5b - 9 in HUS (C3a, 231.3 [80.70 - 791.8] ; C4d, 2140 [10.00 - 960.0]; C5b - 9, 488.4 [212.7 – 1414] ) tended to be increased as compared with TTP (C3a, 134.5 [61.97 - 378.4]; C4d, 1330 [2.000 - 699.0] ; C5b - 9, 390.1 [238.5 - 938.7]). Conclusion: Complement biomarkers are activated to a similar level in both newly diagnosed cases of TTP and aHUS. Complement activation product levels did not differentiate aHUS from TTP. 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: 2014
    detail.hit.zdb_id: 1468538-3
    detail.hit.zdb_id: 80069-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 6
    In: Annals of Hematology, Springer Science and Business Media LLC, Vol. 89, No. 1 ( 2010-1), p. 15-23
    Type of Medium: Online Resource
    ISSN: 0939-5555 , 1432-0584
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2010
    detail.hit.zdb_id: 1458429-3
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 7
    In: Blood, American Society of Hematology, Vol. 120, No. 21 ( 2012-11-16), p. 1691-1691
    Abstract: Abstract 1691 Dasatinib and nilotinib have been founded to be effective and well-tolerated in patients who develop resistance or intolerance to imatinib. Not enough data are currently available to recommend one over the other as the preferred second-line therapy based on efficacy data. Therefore we planned a multicenter retrospective study to analyze the efficacy and safety of dasatinib and nilotinib in patients with imatinib-resistant or –intolerant chronic myeloid leukemia in chronic phase. In this Korean multicenter study, 126 patients imatinib-resistant or –intolerant chronic myeloid leukemia in chronic phase were treated with dasatinib (n=76) or nilotinib (n=50) The purpose of this study was to compare rates of cytogenetic and molecular response rate, event-free survival (EFS), progression-free survival (PFS) and overall survival (OS), and toxicities of nilotinib and dasatinib treatment of imatinib-resistant or –intolerant chronic myeloid leukemia in chronic phase. PFS was defined as the time from the start of treatment to the earliest date of any of following event: loss of complete hematologic response (CHR), loss of major cytogenetic response (MCyR), progression to accelerated phase (AP) or blastic phase (BP), discontinuation due to treatment failure as assessed by the clinician, and death from any cause on therapy. Event was defined by any one of the following: loss of CHR, loss of MCyR, progression to AP or BP, discontinuation due to treatment failure as assessed by the clinician, treatment discontinuation due to toxicity, and death from any cause on therapy. For dasatinib and nilotinib group, median ages (51 years old vs. 53), median durations of CML (23.7 months vs. 19.8 ) before receiving dasatinib or nilotinib and duration of prior imatinib treatment (21.7 months vs 17.7) were comparable. Nilotinib group had a higher proportion of intermediate and high sokal scores at the time of diagnosis than dasatinib group (41.5 vs 29.3% (high), 41.5% vs 32.5%(intermediate), 17.1% vs 37.9(low), p= 0.04). After median follow-up durations of 20.2 months of dasatinib group and 25.3 months of nilotinib group, the rates of major molecular response were 50.0% for dasatinib group and 59.6% for nilotinib group (p=NS) and the rates of MCyR (complete and partial cytogenetic response) were 78.4% for dasatinib group and 74.5% for nilotinib group (p=NS). The estimated EFS at 24 months was 67% and 48% in dasatinib and nilotinib group, respectively. (p 〈 0.05). The estimated PFS at 24 months was 85% and 56% in dasatinib and nilotinib group, respectively. (p 〈 0.05) Overall survival rates were comparable in both treatment groups (24-months OS; dasatinib 91%, nilotinib 94%; p=0.65). Both were generally well tolerated. Hematologic toxicities were more frequent among patients receiving dasatinib. 10 patients (13%) had pleural effusion in dasatinib; 9 events were grade 1 or 2. Elevated liver enzyme were more frequent among patients receiving dasatinib. In conclusion, In this study population, nilotinib and dasatinib showed similar cytogenetic and molecular response rates and survival. Toxicity profiles of two drugs were different and both drugs showed tolerable toxicities. In terms of event-free survival and progression-free survival, dasatinib was superior to nilotinib, but caution is warranted in interpretation because baseline characteristics including hematologic and cytogenetic response at the time of start with dasatinib and nilotinib and sokal scores at the time of diagnosis were different. 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 ...
  • 8
    In: Blood, American Society of Hematology, Vol. 120, No. 21 ( 2012-11-16), p. 2843-2843
    Abstract: Abstract 2843 Introduction The hypomethylating agents (HMAs) 5-azacitidine (AZA) and decitabine (DAC) provided significant overall response rates (40–60%) in myelodysplastic syndrome (MDS), and improved the outcome of higher risk MDS. However, phase III trials comparing AZA or DAC to conventional treatment including best supportive care have shown discrepant results. The aim of this study is to compare the efficacy and safety between AZA and DAC in patients with MDS. Methods We evaluated 203 patients in lower risk with significant cytopenia and higher risk MDS who received AZA and 97 patients who received DAC in Korea between January 2004 and December 2011. AZA 75mg/m2/day was given subcutaneously for 7 days every 4 weeks. DAC 20mg/m2/day was given intravenously over one hour for 5 days every 4 weeks. We compared overall response rate (complete responses, partial responses, marrow complete responses, and hematologic improvements), overall survival (OS) and adverse outcomes with the use of propensity-score matching in the overall cohort according to HMAs. Results Among 300 patients, propensity matching for the entire cohort created 97 matched pairs of patients. The International Prognostic Scoring System risk category was Intermediate-2/High in 40.2%. A median of 5 courses (range 1–24) were delivered in AZA and 5 courses (range 1–14) in DAC. In the overall matched cohort, there was no significant difference between AZA and DAC in overall response rate (44.2% vs. 52.1%, P=.28), OS (28 vs. 23 months; hazard ratio for AZA, 1.14; 95% confidence interval [CI], 0.75 to 1.72, P=.54) with a median follow-up duration of 29.6 months. Among the patient under 65, no significant differences were noted for OS between AZA and DAC group. Among the patient over 65, however, the patients who received DAC showed higher risk of death than those who received AZA with borderline significance (hazard ratio for AZA, 1.58; 95% CI 0.91 to 2.73, P=.10). The cumulative hazard of transformation to acute myeloid leukemia (AML) was 16.3% in AZA and 21.9% in DAC at one year, and 32.2% in AZA and 55.3% in DAC at two year. The incidence of grade 3 & 4 neutropenia was significantly higher in DAC than AZA (P=.026). Among 1151 assessable treatment courses (604 in AZA, 547 in DAC), AZA group have less likely to experience fever episodes requiring intravenous antibiotics than DAC group (8.6 vs. 15.7 episodes per 100 courses; risk ratio, 0.55; P 〈 .001). Conclusions In a cohort of patients in lower risk with significant cytopenia and higher risk MDS, AZA and DAC showed comparable efficacy in terms of overall response rate, OS and risk of transformation to AML. However, patients receiving DAC experienced more frequent grade 3 & 4 neutropenia and fever episodes than patient receiving AZA. When both AZA and DAC are available, safety profiles as well as treatment efficacy need to be considered. 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 ...
  • 9
    In: Blood, American Society of Hematology, Vol. 116, No. 21 ( 2010-11-19), p. 2272-2272
    Abstract: Abstract 2272 To test the correlation of trough plasma Imatinib Mesylate (IM) levels and pharmacogenomic variation with cytogenetic or molecular responses, we measured trough plasma IM levels and analyzed various genetic polymorphisms in newly diagnosed CML patients at 6 months of IM treatment and compared them with the likelihood of achieving cytogenetic complete response (CyCR) or major molecular response to standard dose of IM. Newly diagnosed 94 CML patients were prospectively enrolled in the current study. CyCR was achieved in 71 patients (75.5%). Eighty-four patients (89.4%) showed optimal response (CyCR + cytogenetic partial response CyPR) at 6 months. Trough plasma IM levels were highly variable ranging from 203 to 4980 ng/ml: mean (±SD) was 1392±78.8 ng/ml. Among 47 patients with trough plasma IM level of 〈 1320 ng/ml, 39 patients (83.0%) showed optimal response and 8 (17.0%) suboptimal response. Among 47 patients with trough plasma IM level of ≥1320 ng/ml, 45 patients (95.7%) showed optimal response and 2 (4.3%) suboptimal response (P=0.045). Trough plasma IM level was 1346.0±78.3 ng/ml for the group with non-hematologic toxicity of grade 0 or 1 and 1969.6±365.3 for the group with grade 2–4, which was statistically significant (p=0.038). The impact of single nucleotide polymorphisms (SNPs) in cytochrome P450 (CYP) genes (CYP2D6, CYP3A4, CYP3A5, CYP2C9, CYP2C19, CYP2B6, CYP2C8, CYP1A2) and transporter genes (hOCT1, hOCT2, hOCT3, ABCG2, ABCC2, SLCO1B1, ABCB1) potentially associated with IM trough level was also investigated. The AA genotype in CYP2C19*2 (681G 〉 A) was significantly associated with higher IM trough level than dominant genotype (p=0.021), whereas transporter genes did not show any significant results. The CC genotype of ABCG2 (421C 〉 A) gene was related with CCyR (OR 3.47, 95% CI 1.09–11.05; p=0.030). In conclusion, the incidence of optimal responses in newly diagnosed CML patients who had been treated with standard dose of IM for 6 months was significantly higher in the patient group with trough plasma IM level of ≥1320 ng/ml than the group with 〈 1320 ng/ml, and the trough level of IM was influenced by CYP2C19 genotype. Checking trough plasma IM level together with cytogenetic and molecular data at milestone timing may guide the clinicians to adopt dose escalation or 2nd tyrosine kinase inhibitors in CML patients showing suboptimal response or resistance to standard dose of IM. 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: 2010
    detail.hit.zdb_id: 1468538-3
    detail.hit.zdb_id: 80069-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 10
    In: Molecules and Cells, Springer Science and Business Media LLC, Vol. 32, No. 3 ( 2011-9), p. 243-249
    Type of Medium: Online Resource
    ISSN: 1016-8478 , 0219-1032
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2011
    detail.hit.zdb_id: 1480517-0
    SSG: 12
    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...