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Extracellular vesicles in ageing cold-stored whole blood may not compensate for the decreasing haemostatic function in vitro. 老化的冷藏全血中的细胞外囊泡可能无法弥补体外止血功能的下降。
IF 1.5 4区 医学
Transfusion Medicine Pub Date : 2025-06-01 Epub Date: 2025-01-24 DOI: 10.1111/tme.13122
Petra Ilvonen, Sanna Susila, Ulla Impola, Reetta Pusa, Tuukka Helin, Lotta Joutsi-Korhonen, Saara Laitinen, Jouni Lauronen, Minna Ilmakunnas
{"title":"Extracellular vesicles in ageing cold-stored whole blood may not compensate for the decreasing haemostatic function in vitro.","authors":"Petra Ilvonen, Sanna Susila, Ulla Impola, Reetta Pusa, Tuukka Helin, Lotta Joutsi-Korhonen, Saara Laitinen, Jouni Lauronen, Minna Ilmakunnas","doi":"10.1111/tme.13122","DOIUrl":"10.1111/tme.13122","url":null,"abstract":"<p><strong>Background: </strong>Extracellular vesicles (EVs) have procoagulative properties. As EVs are known to accumulate in stored blood products, we compared the EV content and coagulation capacity of leukoreduced cold-stored whole blood (CSWB) with current prehospital and in-hospital component therapies to understand the role of EVs in the haemostatic capacity of ageing CSWB.</p><p><strong>Materials and methods: </strong>Blood was obtained from 12 O RhD-positive male donors. CSWB was compared with in-hospital component therapy of red blood cells (RBCs), OctaplasLG and buffy-coat platelets and prehospital component therapy of RBC and lyophilized plasma. Samples were drawn on Days 1 and 14 of CSWB and RBC cold storage. Blood count, haemolysis markers, rotational thromboelastometry, sonorheometry and thrombin generation were analysed. EVs were analysed using nanoparticle tracking analysis and cellular origin was determined using imaging flow cytometry.</p><p><strong>Results: </strong>There was a trend towards increased production of both platelet and RBC-derived EVs during CSWB storage. Particle count increased during storage, whereas thrombin generation slowed down and in viscoelastic assays, clotting times prolonged, clot formation became impaired, and stiffness of the resulting clot decreased.</p><p><strong>Conclusion: </strong>Both platelet and RBC-derived EVs increased in number in CSWB during storage. This did not appear to compensate for the in vitro decreasing haemostatic capacity of ageing CSWB, suggesting EVs produced during storage may not have active procoagulative effects, but rather reflect the ageing of blood cells.</p>","PeriodicalId":23306,"journal":{"name":"Transfusion Medicine","volume":" ","pages":"275-286"},"PeriodicalIF":1.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12174729/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anti-Ce in haemolytic disease of the foetus and newborn. 抗- ce在胎儿和新生儿溶血性疾病中的应用。
IF 1.5 4区 医学
Transfusion Medicine Pub Date : 2025-06-01 Epub Date: 2025-03-05 DOI: 10.1111/tme.13134
Rebecca O'Grady, Joan Fitzgerald, Jan Miletin, Carmen Regan, Fergus Guilfoyle, Edel Scally, Catherine Flynn
{"title":"Anti-Ce in haemolytic disease of the foetus and newborn.","authors":"Rebecca O'Grady, Joan Fitzgerald, Jan Miletin, Carmen Regan, Fergus Guilfoyle, Edel Scally, Catherine Flynn","doi":"10.1111/tme.13134","DOIUrl":"10.1111/tme.13134","url":null,"abstract":"<p><strong>Objectives: </strong>To report a delayed case of severe haemolytic disease of the foetus and newborn (HDFN) due to Anti-Ce.</p><p><strong>Background: </strong>HDFN due to maternal antibodies is potentially fatal. As a result, antibody levels and foetal anaemia are periodically monitored and risk assessed throughout pregnancy. HDFN due to Anti-Ce is rare.</p><p><strong>Case report: </strong>A 29-year-old Caucasian female with low titre Anti-Ce and Anti-e antenatally delivered a term baby girl that required multiple transfusions and hospital admissions early in life. The apparent clinical severity of HDFN resulted in investigative testing of a maternal admission sample at delivery for titre levels. Anti-Ce was identified as the cause of HDFN in this case, following an eightfold increase in titre levels from week 28 gestation (titre = 4) to term (titre = 32).</p><p><strong>Discussion: </strong>The severe HDFN outlined in this case was unexpected due to the antibody specificity and low titres antenatally. The Anti-Ce with a titre of 32 implicated in this study is on the threshold for specialist foetal team involvement and vigilant monitoring as per BSH guidelines.</p><p><strong>Conclusion: </strong>Anti-Ce titre monitoring beyond 28 weeks gestation and specialist foetal team involvement early in pregnancy should be considered despite current BSH Guidelines, along with extended neonatal monitoring.</p>","PeriodicalId":23306,"journal":{"name":"Transfusion Medicine","volume":" ","pages":"287-290"},"PeriodicalIF":1.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12174758/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143568342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prevalence of anaemia among blood donors in eastern Morocco: The need for pre-donation haemoglobin assessment. 摩洛哥东部献血者中贫血的流行:捐献前血红蛋白评估的必要性。
IF 1.5 4区 医学
Transfusion Medicine Pub Date : 2025-06-01 Epub Date: 2025-02-13 DOI: 10.1111/tme.13133
Ihab Belmokhtar, Karam Yahya Belmokhtar, Saida Lhousni, Redouane Boulouiz, Zaina Sidqi, Mohammed Choukri, Rachid Seddik, Mohammed Bellaoui
{"title":"Prevalence of anaemia among blood donors in eastern Morocco: The need for pre-donation haemoglobin assessment.","authors":"Ihab Belmokhtar, Karam Yahya Belmokhtar, Saida Lhousni, Redouane Boulouiz, Zaina Sidqi, Mohammed Choukri, Rachid Seddik, Mohammed Bellaoui","doi":"10.1111/tme.13133","DOIUrl":"10.1111/tme.13133","url":null,"abstract":"<p><strong>Background: </strong>Anaemia remains the main cause of deferral in blood donation. However, in Morocco, pre-donation haemoglobin measurement is not systematic.</p><p><strong>Objectives: </strong>The aim of this study was to determine the prevalence of anaemia and associated factors such as sex, age and iron deficiency among blood donors in eastern Morocco in order to improve donor management practices.</p><p><strong>Methods/materials: </strong>The study involved 2013 blood donors from the BRO Biobank. Blood samples were analysed using an automatic blood cell analyser for complete blood counts. Serum ferritin was measured by chemical and immunological analyser. Anaemia was defined as haemoglobin levels less than 13 g/dL in men and 12 g/dL in women, according to the WHO recommendation.</p><p><strong>Results: </strong>The overall prevalence of anaemia in eastern Morocco was 9.84% and it varied significantly by region. The majority of anaemic individuals were iron-deprived (88.64%). Anaemia was much higher in females (14.74%) than in males (5.46%). The highest prevalence of anaemia among females was in the age group of 18-20 years (25.2%), while among males it was in the age group of 61-65 years (18.52%).</p><p><strong>Conclusions: </strong>The high prevalence of anaemia among blood donors in eastern Morocco highlights the need to implement pre-donation haemoglobin assessment in donor selection guidelines and to consider optional ferritin testing for at-risk populations. Moreover, educating donors about iron deficiency and iron-rich diets is essential for sustaining donor health and eligibility.</p>","PeriodicalId":23306,"journal":{"name":"Transfusion Medicine","volume":" ","pages":"243-249"},"PeriodicalIF":1.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143415355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluating the appropriateness of fresh frozen plasma transfusions in two tertiary teaching hospitals. 两所三级教学医院新鲜冷冻血浆输注适宜性评价。
IF 1.5 4区 医学
Transfusion Medicine Pub Date : 2025-05-27 DOI: 10.1111/tme.13142
Jongmin Kim, Kae Lyang Koo, Hyun-Ji Lee, Hyung-Hoi Kim
{"title":"Evaluating the appropriateness of fresh frozen plasma transfusions in two tertiary teaching hospitals.","authors":"Jongmin Kim, Kae Lyang Koo, Hyun-Ji Lee, Hyung-Hoi Kim","doi":"10.1111/tme.13142","DOIUrl":"https://doi.org/10.1111/tme.13142","url":null,"abstract":"<p><strong>Background: </strong>Despite efforts to standardise practice using evidence-based guidelines, fresh frozen plasma (FFP) remains the blood component most frequently prescribed inappropriately. This study assessed the appropriateness of FFP transfusion in two tertiary teaching hospitals and analysed the characteristics of appropriate and inappropriate transfusions.</p><p><strong>Methods: </strong>Patients who had undergone FFP transfusion between October and December 2022 at two tertiary teaching hospitals were retrospectively analysed. Only the initial FFP transfusion data were analysed for each patient. Patient characteristics; laboratory test results, including prothrombin time, international normalised ratio, and activated partial thromboplastin time; and the association of FFP transfusion with various factors were examined. Sub-therapeutic dosing was defined as the transfusion of ≤2 units of FFP. FFP transfusions were classified into eight groups based on a classification algorithm to determine their appropriateness.</p><p><strong>Results: </strong>In total, 584 FFP transfusions (2301 units) were analysed, with 42.1% involving subtherapeutic dosing. FFP transfusions were performed in the intensive care unit (ICU; 30.5%), general ward (24.8%), operating room (21.1%), and emergency room (22.9%). Overall, 51.5% of FFP transfusions were deemed appropriate, with significant variations being observed between the hospitals (Hospital B vs. Hospital A: 73.2% vs. 35.3%). Inappropriate FFP transfusions were associated with a higher INR, with 73.4% of them being associated with severe bleeding and/or surgery.</p><p><strong>Conclusions: </strong>In conclusion, 40.6% of FFP transfusions were deemed inappropriate in the present study owing to failure to meet laboratory criteria. The present study provides valuable insights into the optimisation of plasma transfusion practices and emphasises the requirement for institution-specific management.</p>","PeriodicalId":23306,"journal":{"name":"Transfusion Medicine","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144161199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluating a blood warming device for packed red blood cell transfusions to decrease hypothermia in very preterm infants: A randomised control trial protocol. 评估一种血液加热装置用于填充红细胞输注以降低极早产儿体温过低:一项随机对照试验方案。
IF 1.5 4区 医学
Transfusion Medicine Pub Date : 2025-05-15 DOI: 10.1111/tme.13143
Kayla C Everhart, Michael D Wirth, Victor N Iskersky, Robin B Dail
{"title":"Evaluating a blood warming device for packed red blood cell transfusions to decrease hypothermia in very preterm infants: A randomised control trial protocol.","authors":"Kayla C Everhart, Michael D Wirth, Victor N Iskersky, Robin B Dail","doi":"10.1111/tme.13143","DOIUrl":"https://doi.org/10.1111/tme.13143","url":null,"abstract":"<p><strong>Background: </strong>This protocol describes a study to test a commercial blood warming device in warming blood transfusions to prevent hypothermia associated with packed red blood cell (PRBC) transfusions in very preterm infants.</p><p><strong>Objectives: </strong>Very preterm infants receiving blood transfusions warmed by a commercial blood warmer will have less central body hypothermia post transfusion (abdominal temperatures <36.5°C) and/or a higher mean abdominal temperature for the hour after the transfusion is complete compared to those receiving blood transfusions by standard of care. This trial has been registered with Clinicaltrials.gov (trial number NCT05170633).</p><p><strong>Methods: </strong>In this trial, which is funded by The Gerber Foundation and adhered to the SPIRIT2013 checklist, 140 very preterm infants with an order to receive PRBCs will be randomised into a standard of care group to receive one PRBC transfusion over 3 h with blood in a syringe at room temperature or into the intervention group to receive one PRBC transfusion over 3 h using a Hotline® Blood and Fluid Warmer. Abdominal skin temperatures will be measured every minute through a blood transfusion using a skin thermistor and datalogger.</p><p><strong>Data analysis: </strong>Descriptive statistics will be computed for each group to compare demographics and all infant pre-, during, and post-transfusion body temperatures. A student t-test will be used to compare the groups on mean post-transfusion temperatures as a primary outcome variable. To examine thermal change over time between the two groups, linear mixed models with a random intercept will be utilised.</p><p><strong>Results: </strong>This trial began in January 2022, in a South Carolina neonatal intensive care unit and is ongoing.</p><p><strong>Discussion: </strong>This RCT will determine if warming PRBC transfusions will prevent hypothermia in preterm infants during and after blood transfusions. Results from this trial will be used to design national standards for blood transfusions in preterm infants to decrease morbidity and mortality.</p>","PeriodicalId":23306,"journal":{"name":"Transfusion Medicine","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144080503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Antigen masking indirect antiglobulin test can mitigate the interference of Mezagitamab, a novel anti-CD38 antibody, in serological pre-transfusion testing. 抗原掩盖间接抗球蛋白试验可以减轻新型抗cd38抗体Mezagitamab对输血前血清学检测的干扰。
IF 1.5 4区 医学
Transfusion Medicine Pub Date : 2025-04-09 DOI: 10.1111/tme.13139
Cora P Habicht, Clemens Schneeweiss
{"title":"Antigen masking indirect antiglobulin test can mitigate the interference of Mezagitamab, a novel anti-CD38 antibody, in serological pre-transfusion testing.","authors":"Cora P Habicht, Clemens Schneeweiss","doi":"10.1111/tme.13139","DOIUrl":"https://doi.org/10.1111/tme.13139","url":null,"abstract":"<p><strong>Objectives: </strong>Investigation of the interference of mezagitamab in serological pre-transfusion testing and the use of DaraEx to overcome it.</p><p><strong>Background: </strong>Administration of anti-CD38 antibodies is a state-of-the-art therapy for patients diagnosed with multiple myeloma. However, treatment with the currently approved anti-CD38 antibodies regularly results in widespread agglutination of red blood cells in serological pre-transfusion testing, making the determination of irregular antibodies and timely transfusion of compatible blood a challenge. Mezagitamab, a novel monoclonal anti-CD38 antibody, is currently under clinical investigation, not only for the treatment of multiple myeloma but also for other indications such as generalised myasthenia gravis.</p><p><strong>Methods/materials: </strong>Mezagitamab or daratumumab spiked plasmas, with or without irregular antibodies, were tested in column agglutination technique cards. DaraEx was used to mitigate occurring interferences.</p><p><strong>Results: </strong>Mezagitamab interferes with the indirect antiglobulin test, with comparable titers but weaker reaction strengths than daratumumab. DaraEx, a reagent containing Fab fragments of an anti-CD38 antibody, is able to completely overcome this interference in the antigen masking indirect antiglobulin test (AMIAT). DaraEx treatment does not interfere with tested irregular antibodies.</p><p><strong>Conclusion: </strong>All novel anti-CD38 antibodies, such as mezagitamab, have the potential to interfere in serological pre-transfusion testing. While masking only one epitope, DaraEx has so far been an effective mitigation for all clinical anti-CD38 antibodies.</p>","PeriodicalId":23306,"journal":{"name":"Transfusion Medicine","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144024924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Understanding hepcidin for iron management in pregnancy. 了解hepcidin在妊娠期铁管理中的作用。
IF 1.5 4区 医学
Transfusion Medicine Pub Date : 2025-04-01 Epub Date: 2025-01-28 DOI: 10.1111/tme.13125
Sarah Rosson, Sue Pavord
{"title":"Understanding hepcidin for iron management in pregnancy.","authors":"Sarah Rosson, Sue Pavord","doi":"10.1111/tme.13125","DOIUrl":"10.1111/tme.13125","url":null,"abstract":"<p><p>Iron deficiency anaemia (IDA) poses a significant health challenge during pregnancy, affecting up to 30% of pregnant women in the UK. It has been linked to poor health outcomes for the mother, foetus, and the infant. Despite its prevalence and impact, current diagnostic and therapeutic approaches are limited. Ensuring an adequate iron status in pregnancy requires prompt investigation and treatment whilst avoiding excessive iron supplementation and its associated side effects. Hepcidin, a key regulator of iron trafficking in the body, has emerged as a promising candidate for tailoring iron supplementation to individual needs and responsiveness. However, current research on hepcidin-based approaches yields mixed findings, necessitating a comprehensive review to elucidate its potential utility in guiding iron therapy for pregnant women with IDA. This literature review seeks to synthesise existing evidence to explore the role of hepcidin in personalised iron supplementation for pregnant women with IDA and to identify avenues for future research to pave the way for improved management of IDA in pregnancy.</p>","PeriodicalId":23306,"journal":{"name":"Transfusion Medicine","volume":" ","pages":"109-115"},"PeriodicalIF":1.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11999002/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143053569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The impact of Asian-Indian criteria for higher body mass index and preservative solutions on haemolysis of stored red blood cells: A prospective observational study. 亚洲-印度高体重指数标准和防腐剂溶液对储存红细胞溶血的影响:一项前瞻性观察研究。
IF 1.5 4区 医学
Transfusion Medicine Pub Date : 2025-04-01 Epub Date: 2024-12-30 DOI: 10.1111/tme.13120
Somnath Mukherjee, Stephy Varghese K, Satya Prakash, Debasish Mishra, Ansuman Sahu
{"title":"The impact of Asian-Indian criteria for higher body mass index and preservative solutions on haemolysis of stored red blood cells: A prospective observational study.","authors":"Somnath Mukherjee, Stephy Varghese K, Satya Prakash, Debasish Mishra, Ansuman Sahu","doi":"10.1111/tme.13120","DOIUrl":"10.1111/tme.13120","url":null,"abstract":"<p><strong>Introduction: </strong>The quality of packed red blood cells (PRBC) is influenced by various factors such as the collection and processing method, storage conditions, type of bag materials used, anticoagulant properties, and donor characteristics. Studies have indicated that haemolysis in stored RBC bags is linked to male sex, older age, high haemoglobin count, and increased body mass index (BMI). The study's primary objective was to investigate whether a high BMI, as per Asian Pacific criteria among donors, is associated with an elevated haemolysis rate in stored RBC. Additionally, the study aimed to examine any protective effects of different types of preservatives added to blood bags against RBC haemolysis during storage.</p><p><strong>Methods: </strong>Stored RBCs from 100 blood donors with different BMI are analysed for haemolysis on 0, 21, and last day (35/42 days) of storage. A BMI cut-off of 23 was taken for healthy and overweight consideration in blood donors. The blood bags selected for storage were either with additive solution (SAGM) or without additive along with an anticoagulant. The association of the percentage of haemolysis with different variables like age, BMI, and Haemoglobin of the donor were analysed. The correlation between the haematocrit of the bag and haemolysis was determined.</p><p><strong>Results: </strong>This study did not find any significant increase in the percentage of haemolysis in blood bags with higher BMI on the last day of storage (p = 0.424). The haemolysis percentage was higher in bags without SAGM than in bags with an additive solution (p = 0.000). The high haematocrit of the bag has a significant positive correlation with the percentage of haemolysis (p = 0.002). Significantly higher haemolysis in CPDA-1 bags of donor RBC units of BMI >23 groups was observed (p = 0.000) compared to those stored in CPD-SAGM bags.</p><p><strong>Conclusion: </strong>Indian population for higher BMI, as per Asia Pacific cut-off criteria, did not significantly impact the haemolysis of blood bags. Stored RBCs with SAGM, especially of donors having BMI > 23, had a protective effect against haemolysis in blood bags. The percentage of haemolysis was positively correlated with the haematocrit of stored RBC in bags.</p>","PeriodicalId":23306,"journal":{"name":"Transfusion Medicine","volume":" ","pages":"144-150"},"PeriodicalIF":1.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Universal new blood cell elution method with extensive phenotyping. 具有广泛表型的通用新型血细胞洗脱方法。
IF 1.5 4区 医学
Transfusion Medicine Pub Date : 2025-04-01 Epub Date: 2025-02-09 DOI: 10.1111/tme.13126
Lorraine Caruccio, Karen Byrne, David F Stroncek
{"title":"Universal new blood cell elution method with extensive phenotyping.","authors":"Lorraine Caruccio, Karen Byrne, David F Stroncek","doi":"10.1111/tme.13126","DOIUrl":"10.1111/tme.13126","url":null,"abstract":"<p><strong>Background/objectives: </strong>No erythrocyte elution method developed is uniformly successful or allows elution/phenotyping together. We previously developed an elution method using deionised formamide. We modified it to be universal for various cell types and call it modified formamide-method (Fm-method). It also preserves cells for phenotyping after elution.</p><p><strong>Materials and methods: </strong>Fm-method reagent contains deionised formamide, buffered high salt, EDTA, TE. Elution-reagent is removed by column centrifugation. Blood samples were used for development and validation. Results compared to commercial/common antibody elution/phenotyping methods.</p><p><strong>Results: </strong>Fm-method eluted antibodies, complement, other proteins, and nucleic acids and works with erythrocytes, leukocytes, other cells. It worked better than commercial kits used for elution/phenotyping with no false positives/negatives. It did not denature Kell and Lewis antigens and could be repeated as needed on samples to recover more antibodies and clean cells for phenotyping. Western blotting, PAGE and FCM demonstrated eluted proteins were not degraded and cells remained intact.</p><p><strong>Conclusion: </strong>Fm-method is excellent for elution and phenotyping and permits elution and phenotyping with one method and sample. It is useful for studies of various bound molecules and cell surface structures. It should be possible to elute various simple and complex carbohydrates as well. The Fm-method is efficient, inexpensive, scalable, uses common reagents. It should have excellent applications in various clinical, research, commercial settings.</p>","PeriodicalId":23306,"journal":{"name":"Transfusion Medicine","volume":" ","pages":"151-167"},"PeriodicalIF":1.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11999790/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143383416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Serological investigations on penicillin-induced antibodies in the Thai population. 泰国人群青霉素诱导抗体的血清学调查。
IF 1.5 4区 医学
Transfusion Medicine Pub Date : 2025-04-01 Epub Date: 2024-12-01 DOI: 10.1111/tme.13117
Piyathida Khumsuk, Oytip Nathalang, Tanaporn Choychimplee, Wiradee Sasikarn, Kamphon Intharanut
{"title":"Serological investigations on penicillin-induced antibodies in the Thai population.","authors":"Piyathida Khumsuk, Oytip Nathalang, Tanaporn Choychimplee, Wiradee Sasikarn, Kamphon Intharanut","doi":"10.1111/tme.13117","DOIUrl":"10.1111/tme.13117","url":null,"abstract":"<p><strong>Objectives: </strong>The study aimed to assess the conditions for coating RBCs with penicillin and examine the anti-penicillin reactions of random Thai patients' sera against penicillin-coated RBCs and normal sera from Thai donors testing in the presence of the drug.</p><p><strong>Background: </strong>Penicillin-induced immunologic haemolytic anaemia (IHA) is reportedly related to possessing antipenicillin antibodies, immunoglobulin G (IgG), which has been identified in testing penicillin-coated red blood cells (RBCs). In addition, low titre penicillin antibodies, often IgM, are detected in donors by testing in the presence of a solution of the penicillin.</p><p><strong>Materials and methods: </strong>Penicillin-coated RBCs were produced, and antipenicillin was tested against those penicillin-coated RBCs amongst random Thai patients who had strongly positive direct antiglobulin (≥3+). Additionally, sera from Thai blood donors were tested in the presence of the penicillin. These relationships were determined by comparing the numbers of penicillin-antibody positive patients with their diagnosis, sex, age and blood type.</p><p><strong>Results: </strong>Penicillin requires a high pH to optimally adhere to RBCs that showed validated reactions with controls. Enrolment of 304 random patients, of whom 17 (5.59%) had positive antipenicillin tests using penicillin-coated RBCs. Of the 246 donor samples, 3 (1.22%) displayed positive reactivities in the presence of soluble penicillin. Furthermore, no association was discovered between the patient's characteristics and antipenicillin positivity.</p><p><strong>Conclusions: </strong>This is the first study to develop and report on the low percentage of patients' and donors' sera without IHA. Investigating suspected cases of penicillin-induced IHA requires following our suggested method to identify clinically significant antipenicillin.</p>","PeriodicalId":23306,"journal":{"name":"Transfusion Medicine","volume":" ","pages":"168-176"},"PeriodicalIF":1.5,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142772570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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