Laboratory hematology : official publication of the International Society for Laboratory Hematology最新文献

{"title":"Common alpha-thalassemia deletions in transfusion-dependent thalassemia patients in the Southeast Asia region of Myanmar.","authors":"Ne-Win,&nbsp;Keiko Harano,&nbsp;Teruo Harano,&nbsp;Thein-Thein-Myint,&nbsp;Rai-Mra,&nbsp;Aye-Aye-Myint,&nbsp;Kunio Shimono,&nbsp;Shigeru Okada","doi":"10.1532/LH96.06017","DOIUrl":"https://doi.org/10.1532/LH96.06017","url":null,"abstract":"<p><p>Screening of 3 common alpha-thalassemia (thal) deletions (-alpha3.7, -alpha4.2 and --SEA) in Southeast Asia was done by polymerase chain reaction in 170 unrelated Myanmar thal patients receiving transfusions. Thal deletions were detected in 27 patients (15.9%) as: (1) alpha-thal-2 (-alpha3.7/alphaalpha) in 12 heterozygous or hemoglobin (Hb) E-beta-thal cases; (2) alpha-thal-1 in 7 patients (2-alpha3.7/-alpha3.7 and 5 --SEA/alphaalpha); and (3) Hb H (-alpha3.7/--SEA) in 8 patients. The latter 15 alpha-thal-1 and Hb H patients had no beta-thal mutations and represented 8.8% of the overall patients seeking transfusion for refractory anemia in Myanmar. This is the first description of alpha-thal in Myanmar from the molecular aspect, and its clinical and racial heterogeneity are described and discussed.</p>","PeriodicalId":85078,"journal":{"name":"Laboratory hematology : official publication of the International Society for Laboratory Hematology","volume":"12 3","pages":"139-42"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26234620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"XIXth International Symposium on Technological Innovations in Laboratory Hematology. Amsterdam, The Netherlands. April 25-28, 2006. Poster Abstracts Part II.","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":85078,"journal":{"name":"Laboratory hematology : official publication of the International Society for Laboratory Hematology","volume":"12 3","pages":"160-86"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26235734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Loss of factor VIII and von Willebrand factor activities during cold storage of whole blood is reversed by rewarming.","authors":"Majed A Refaai,&nbsp;Elisabeth M Van Cott,&nbsp;Michael Lukoszyk,&nbsp;James Hughes,&nbsp;Charles S Eby","doi":"10.1532/LH96.05043","DOIUrl":"https://doi.org/10.1532/LH96.05043","url":null,"abstract":"<p><p>Documentation of preanalytical conditions that could result in inaccurate results and misdiagnoses of patients is important. It has recently been reported that a significant loss of factor VIII (FVIII) and von Willebrand factor (vWF) activity occurs when citrated whole blood is stored on ice. We tested the hypothesis that the cold-dependent loss of FVIII and vWF activity is due to the formation of cryoprecipitate and is reversed by rewarming the citrated whole blood before centrifugation and removal of plasma. We collected venous blood from 10 healthy subjects into 3.2% sodium citrate glass tubes. One tube was immediately centrifuged and the plasma was stored at -20 degrees C. Following storage in an ice bath (4 degrees C) for 3.5 hours, 1 tube was immediately centrifuged and processed while the second tube was placed in a 37 degrees C water bath for 5 minutes then centrifuged and processed. Subsequently, plasma samples were quickly thawed at 37 degrees C and the following tests were performed: prothrombin time (PT), partial thrombin time (aPTT), FVIII activity, vWF antigen (vWF:Ag), and vWF activity (vWF:Act). Means for each analyte from the 2 tubes stored at 4 degrees C for 3.5 hours with or without rewarming were compared to baseline tube using the Student t test. Compared to the baseline tube results, PT and aPTT showed no significant changes in either of the tubes stored at 4 degrees C for 3.5 hours. However, FVIII, vWF:Ag, and vWF:Act were significantly lower in the tubes stored at 4 degrees C for 3.5 hours, but no differences were detected between baseline and rewarmed tube results. In conclusion, prolonged storage of citrated whole blood at 4 degrees C causes a clinically significant reduction of FVIII and vWF activities. The losses are completely reversed by rewarming the tube prior to processing. This is consistent with a reversible cryoprecipitation of vWF and FVIII rather than a cold-activated enzymatic degradation.</p>","PeriodicalId":85078,"journal":{"name":"Laboratory hematology : official publication of the International Society for Laboratory Hematology","volume":"12 2","pages":"99-102"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26068911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recommendations for evaluation of coagulation analyzers.","authors":"Chris Gardiner,&nbsp;Steve Kitchen,&nbsp;Ray J Dauer,&nbsp;Kandice Kottke-Marchant,&nbsp;Dorothy M Adcock","doi":"10.1532/LH96.05031","DOIUrl":"https://doi.org/10.1532/LH96.05031","url":null,"abstract":"","PeriodicalId":85078,"journal":{"name":"Laboratory hematology : official publication of the International Society for Laboratory Hematology","volume":"12 1","pages":"32-8"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25885861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly sensitive patient-specific real-time PCR SNP assay for chimerism monitoring after allogeneic stem cell transplantation.","authors":"Rinat Eshel,&nbsp;Oded Vainas,&nbsp;Meirav Shpringer,&nbsp;Elizabeth Naparstek","doi":"10.1532/LH96.05034","DOIUrl":"https://doi.org/10.1532/LH96.05034","url":null,"abstract":"<p><p>Chimerism analysis after allogeneic stem cell transplantation (allo-SCT) is an important diagnostic tool for the documentation of engraftment, early detection of graft failure, and recurrence of the disease. Current assays rely on the genetic polymorphism between the donor and the recipient, and allow semiquantitative or quantitative analysis of chimerism. The most common method in use is based on the amplification of the short tandem repeats (STR). This method, with 1% to 5 sensitivity, is useful for the documentation of engraftment, but is insufficient for the detection of minimal residual disease or early relapse, when medical intervention is urgently needed. Recently, single-nucleotide polymorphism (SNP) has been suggested as an alternative, more accurate system to monitor chimerism. The purpose of our study was to develop an easy, economical, and sensitive method for the detection of chimerism following allo-SCT using the SNP technology. Our approach is based on SNP patient-specific quantitative real-time polymerase chain reaction (PCR) using nonlabeled primers. Our results show that this allele-specific SNP real-time PCR approach is sensitive, relatively cheap, and offers a fast and reliable assay for the monitoring of hematopoietic engraftment and for the detection of minimal residual disease in patients after allo-SCT.</p>","PeriodicalId":85078,"journal":{"name":"Laboratory hematology : official publication of the International Society for Laboratory Hematology","volume":"12 1","pages":"39-46"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25885862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Immature platelet fraction as a predictor of platelet recovery following hematopoietic progenitor cell transplantation.","authors":"Marjorie L Zucker,&nbsp;Carol A Murphy,&nbsp;Jane M Rachel,&nbsp;Gregory A Martinez,&nbsp;Sunil Abhyankar,&nbsp;Joseph P McGuirk,&nbsp;Kimberly J Reid,&nbsp;Fred V Plapp","doi":"10.1532/LH96.06012","DOIUrl":"https://doi.org/10.1532/LH96.06012","url":null,"abstract":"<p><p>The immature platelet fraction (IPF) as determined by the Sysmex XE-2100 is a rapid automated measure of the least mature component of the platelet population and is thought to correlate with thrombopoietic activity of the marrow. We investigated the ability of IPF to predict platelet recovery following hematopoietic progenitor cell (HPC) transplantation. IPF was compared to standard parameters of hematopoietic recovery, including the immature reticulocyte fraction (IRF), an early predictor of recovery. Fifty patients undergoing peripheral blood HPC transplantation (38 autologous and 12 allogeneic) were followed daily for 11 to 28 days after transplantation with measurement of IPF, IRF, absolute neutrophil counts (ANC) and platelet counts. Mean days to recovery for IPF was 3.1 days less than for platelet count (P <.0001), 3.8 days less than for ANC (P <.0001), and 0.6 days less than for IRF (P = .0477). IPF recovered at least 1 day prior to platelet count in 79% (38 of 48) of patients, and was followed by platelet count recovery within 1 to 12 days (mean, 4.1 days). When autologous and allogeneic patient groups were analyzed separately, IPF recovered significantly earlier than platelet count and ANC in both groups (P <.0001). Thrombopoietin (TPO) levels in 5 patients receiving transplants correlated with IPF; however, this appeared to be secondary to an inverse correlation of both TPO and IPF with platelet count. IPF is comparable to IRF as one of the earliest predictors of hematopoietic recovery following peripheral blood HPC transplantation. IPF could potentially be useful as a predictor of platelet recovery in other bone marrow failure syndromes.</p>","PeriodicalId":85078,"journal":{"name":"Laboratory hematology : official publication of the International Society for Laboratory Hematology","volume":"12 3","pages":"125-30"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26234617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gamma testing experience with the ACL TOP hemostasis testing system.","authors":"Daniel K H Ho,&nbsp;Marni Lollo,&nbsp;Marian Reyes,&nbsp;M Bernadette Garvey","doi":"10.1532/LH96.05038","DOIUrl":"https://doi.org/10.1532/LH96.05038","url":null,"abstract":"<p><p>As a gamma testing site or a limited early release site for the ACL TOP, St. Michael's Hematology Laboratory evaluated the ACL TOP for its ability to fit into a laboratory whose workflow includes large volumes of routine and specialty hemostasis assays. This evaluation included the determination of the ACL TOP's precision, normal ranges, and reagent sensitivities. Analytical correlation studies for the ACL TOP were performed in comparison to the ACL ADVANCE. The ACL TOP was also tested for its ability to handle large volumes of not only routine assays but also more specialized coagulation assays. Instrument precision, normal reference range assignment, and factor sensitivities met the requirements of this laboratory. The ACL TOP correlated favorably to the ACL ADVANCE, and in a workup for thrombophilia its throughput was twice what was seen with the ACL ADVANCE. The speed of the ACL TOP was impressive, generating results at a rate of almost 5 results/min. In this gamma testing study, the ACL TOP has demonstrated suitability as a precise coagulation analyzer for use in the settings of a high-volume, fast-paced, specialized coagulation laboratory faced with demanding turnaround times.</p>","PeriodicalId":85078,"journal":{"name":"Laboratory hematology : official publication of the International Society for Laboratory Hematology","volume":"12 4","pages":"217-21"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26399903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of hypochromic erythrocytes in combination with sTfR-F index for predicting response to r-HuEPO in anemic patients with multiple myeloma.","authors":"Eirini Katodritou,&nbsp;Matthaios Speletas,&nbsp;Kostas Zervas,&nbsp;Dimitrios Kapetanos,&nbsp;Elisabeth Georgiou,&nbsp;Anna Christoforidou,&nbsp;Aikaterini Pavlitou,&nbsp;Michael Sion,&nbsp;John Christakis","doi":"10.1532/LH96.05030","DOIUrl":"https://doi.org/10.1532/LH96.05030","url":null,"abstract":"<p><p>The purpose of this study was to evaluate the sTfR-F index and hypochromic erythrocytes (HYPO%) as potential predictors of response to recombinant human erythropoietin (r-HuEPO) of anemic patients with multiple myeloma (MM) before treatment, as well as early in the course of treatment. Twenty-six newly diagnosed anemic MM patients received r-HuEPO 30,000 IU/wk sc, for six weeks. The sTfR-F index and HYPO% were determined at baseline and at weeks 2 and 6. Patients were classified in 1 of 4 categories of a diagnostic plot, according to erythropoietic state (ES I-IV), defined by the combination of sTfR-F index and HYPO%. Sixteen of 20 patients in ES I and II before treatment responded to r-HuEPO, whereas none of the 6 patients in ES III and IV responded (P < .001). At week 2, 44% of patients who responded and 60% of the nonresponders were in functional iron deficiency (FID) and the proportion increased to 69% and 80%, respectively, by week 6. Seven of the patients who did not respond received in addition 200 mg iron sucrose IV weekly, for the next 4 weeks, and 6 of them responded. These results suggest that combination of sTfR-F index and HYPO% in a diagnostic plot can be used as a predictive model to recognize patients who will benefit from r-HuEPO and identify FID requiring iron supplementation, before treatment and early in the course of treatment, contributing thus to optimization of r-HuEPO therapy.</p>","PeriodicalId":85078,"journal":{"name":"Laboratory hematology : official publication of the International Society for Laboratory Hematology","volume":"12 1","pages":"47-54"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25885863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of red blood cells stored in saline suspension for immediate spin crossmatch.","authors":"Lisa Denesiuk,&nbsp;Gwen Clarke","doi":"10.1532/LH96.06019","DOIUrl":"https://doi.org/10.1532/LH96.06019","url":null,"abstract":"<p><p>The purpose of this study was to validate a procedure for using red blood cell suspensions stored for up to 10 days in an immediate spin crossmatch. Ten group A and 10 group B SAG-M donor unit segments were opened on day 0. The red cells were divided into 2 tubes and each diluted with saline to a 3% to 5% cell suspension. The cell suspensions were tested using a standard immediate spin technique against pooled group A, group B, and group O plasma each day for 10 days. One set of cells was stored refrigerated as a 3% to 5% cell suspension. Saline was removed from the parallel set of cells before storage. All 480 tests that were expected to be negative were negative. On 2 separate occasions 1+ or 2+ reactions that disappeared before the cell button was completely resuspended were noted. All 960 tests that were expected to be positive were positive. All but 4 results were graded as 3+ or 4+. Four 2+ reactions occurred with 2 units that were typed as A1 negative. Our results indicate that cells stored refrigerated in normal saline as a 3% to 5% cell suspension may be used for immediate spin crossmatch for up to 10 days.</p>","PeriodicalId":85078,"journal":{"name":"Laboratory hematology : official publication of the International Society for Laboratory Hematology","volume":"12 3","pages":"156-9"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26235733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of a mouse hybridoma secreting monoclonal antibody highly specific to hemoglobin Bart's (gamma4).","authors":"Luksana Makonkawkeyoon,&nbsp;Somphon Pharephan,&nbsp;Sanit Makonkawkeyoon","doi":"10.1532/LH96.06027","DOIUrl":"https://doi.org/10.1532/LH96.06027","url":null,"abstract":"<p><p>Hemoglobin (Hb) Bart's (gamma4) was isolated and purified from Hb Bart's hydrops fetalis syndrome blood by CM-Sephadex C-50 chromatography. The isolated Hb Bart's was analyzed for its purity by high performance liquid chromatography. Balb/c mice were immunized intraperitoneally with Hb Bart's. The immunized mouse splenic cells were hybridized with mouse myeloma, X63-Ag8.653, by polyethylene glycol. There were 12 hybridoma clones, out of several thousand culture wells, secreting antibody against purified Hb Bart's. However, when those 12 monoclonal antibodies (mAb) were tested with Hb Bart's (gamma4), HbF (alpha2gamma12), HbH, HbE, and HbA2, there was only 1 hybridoma clone secreting mAb highly reactive to Hb Bart's with very low reactivity to HbF. A rabbit polyclonal antibody with relative high reactivity to Hb Bart's compared to HbF with the ratio of 2.4:1 was also produced by affinity column chromatography for the purpose of developing an enzyme-linked immunosorbent assay (ELISA) base for qualitative and quantitative determination of Hb Bart's in adult hemolysates. Preliminary results in quantitative determination of Hb Bart's in Hb solution of 3 alpha thalassemia families having at least 1 child with HbH disease and 6 normal subjects indicated that it was possible to quantify Hb Bart's by our developed ELISA with appropriate sensitivity and specificity.</p>","PeriodicalId":85078,"journal":{"name":"Laboratory hematology : official publication of the International Society for Laboratory Hematology","volume":"12 4","pages":"193-200"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26399900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}