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Immunophenotypic characterization of leukemic stem cells in acute myeloid leukemia using single tube 10-colour panel by multiparametric flow cytometry: Deciphering the spectrum, complexity and immunophenotypic heterogeneity 通过多参数流式细胞术使用单管 10 色面板鉴定急性髓性白血病白血病干细胞的免疫表型特征:解密白血病的谱系、复杂性和免疫表型异质性。
IF 2.2 4区 医学 Q3 HEMATOLOGY Pub Date : 2024-03-08 DOI: 10.1111/ijlh.14250
Nupur Das, Devasis Panda, Smeeta Gajendra, Ritu Gupta, Deepshi Thakral, Gurvinder Kaur, Aafreen Khan, Vivek Kumar Singh, Arushi Vemprala, Sameer Bakhshi, Rachna Seth, Ranjit Kumar Sahoo, Atul Sharma, Sandeep Rai, Vijay K. Prajapati, Saroj Singh

Introduction

Despite extensive research, comprehensive characterization of leukaemic stem cells (LSC) and information on their immunophenotypic differences from normal haematopoietic stem cells (HSC) is lacking. Herein, we attempted to unravel the immunophenotypic (IPT) characteristics and heterogeneity of LSC using multiparametric flow cytometry (MFC) and single-cell sequencing.

Materials and Methods

Bone marrow aspirate samples from patients with acute myeloid leukaemia (AML) were evaluated using MFC at diagnostic and post induction time points using a single tube-10-colour-panel containing LSC-associated antibodies CD123, CD45RA, CD44, CD33 and COMPOSITE (CLL-1, TIM-3, CD25, CD11b, CD22, CD7, CD56) with backbone markers that is, CD45, CD34, CD38, CD117, sCD3. Single-cell sequencing of the whole transcriptome was also done in a bone marrow sample.

Results

LSCs and HSCs were identified in 225/255 (88.2%) and 183/255 (71.6%) samples, respectively. Significantly higher expression was noted for COMPOSITE, CD45RA, CD123, CD33, and CD44 in LSCs than HSCs (p < 0.0001). On comparing the LSC specific antigen expressions between CD34+ (n = 184) and CD34- LSCs (n = 41), no difference was observed between the groups. More than one sub-population of LSC was demonstrated in 4.4% of cases, which further revealed high concordance between MFC and single cell transcriptomic analysis in one of the cases displaying three LSC subpopulations by both methods.

Conclusion

A single tube-10-colour MFC panel is proposed as an easy and reproducible tool to identify and discriminate LSCs from HSCs. LSCs display both inter- and intra-sample heterogeneity in terms of antigen expressions, which opens the facets for single cell molecular analysis to elucidate the role of subpopulations of LSCs in AML progression.

简介尽管开展了大量研究,但仍缺乏白血病干细胞(LSC)的全面特征及其与正常造血干细胞(HSC)免疫表型差异的信息。在此,我们尝试使用多参数流式细胞术(MFC)和单细胞测序技术来揭示白血病干细胞的免疫表型(IPT)特征和异质性:在诊断时间点和诱导后时间点使用多参数流式细胞术评估急性髓性白血病(AML)患者的骨髓穿刺样本,使用单管-10色板,包含LSC相关抗体CD123、CD45RA、CD44、CD33和COMPOSITE(CLL-1、TIM-3、CD25、CD11b、CD22、CD7、CD56),以及骨干标记物CD45、CD34、CD38、CD117和sCD3。还对骨髓样本的全转录组进行了单细胞测序:结果:在 225/255 份样本(88.2%)和 183/255 份样本(71.6%)中分别发现了造血干细胞和造血干细胞。在低造血干细胞中,COMPOSITE、CD45RA、CD123、CD33 和 CD44 的表达量明显高于高造血干细胞(p):建议使用单管-10 色 MFC 面板作为一种简便、可重复的工具来鉴别和区分 LSC 与 HSC。LSCs 在抗原表达方面显示出样本间和样本内的异质性,这为单细胞分子分析开辟了道路,有助于阐明 LSCs 亚群在急性髓细胞性白血病进展中的作用。
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引用次数: 0
Identification of a novel ITGAX::RN7SL2 fusion in acute myelocytic leukemia 在急性髓细胞白血病中发现新型 ITGAX::RN7SL2 融合体。
IF 3 4区 医学 Q3 HEMATOLOGY Pub Date : 2024-03-07 DOI: 10.1111/ijlh.14263
Zhan Su, Beibei Cong, Xiaojuan Li
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引用次数: 0
How to investigate mild to moderate bleeding disorders and bleeding disorder of unknown cause 如何调查轻中度出血性疾病和原因不明的出血性疾病。
IF 3 4区 医学 Q3 HEMATOLOGY Pub Date : 2024-03-07 DOI: 10.1111/ijlh.14266
Alessandro Casini, Johanna Gebhart

A bleeding tendency is one of the most common complaints observed by hematologists. It is challenging to differentiate a clinically insignificant bleeding from a bleeding phenotype that requires hemostatic evaluation and medical intervention. A thorough review of personal and familial history, objective assessment of bleeding severity using a bleeding assessment tool, and a focused physical examination are critical to correctly identifying suspected patients with mild to moderate bleeding disorders (MBDs). A basic laboratory work-up should be performed in all patients referred for a bleeding tendency. If a hemostatic abnormality is found such as evidence of von Willebrand disease, a platelet function disorder, or a coagulation factor deficiency, more extensive testing should be performed to further characterize the bleeding disorder. Conversely, if all results are normal the patient is considered to have bleeding disorder of unknown cause (BDUC). For patients with BDUC, further evaluation may include non-routine testing to look for rare bleeding disorders not detected by routine hemostasis tests, such as thrombomodulin-associated coagulopathy, tissue factor pathway inhibitor-related bleeding disorder, hyperfibrinolytic-bleeding disorders or impaired tissue factor production. In this review, we summarize the stepwise diagnostic procedure in MBDs and provide some insights into the biological features of BDUC.

出血倾向是血液科医生最常见的主诉之一。将临床症状不明显的出血与需要止血评估和医疗干预的出血表型区分开来具有挑战性。全面回顾个人和家族病史、使用出血评估工具客观评估出血严重程度以及进行重点体格检查对于正确识别轻度至中度出血性疾病(MBD)疑似患者至关重要。所有因出血倾向转诊的患者都应进行基本的实验室检查。如果发现止血异常,如冯-威廉氏病、血小板功能紊乱或凝血因子缺乏,则应进行更广泛的检查以进一步确定出血性疾病的特征。相反,如果所有结果都正常,则认为患者患有原因不明的出血性疾病(BDUC)。对于原因不明的出血性疾病患者,进一步的评估可能包括非常规检查,以寻找常规止血检查未发现的罕见出血性疾病,如血栓调节蛋白相关性凝血病、组织因子通路抑制剂相关性出血性疾病、高纤溶性出血性疾病或组织因子生成障碍。在这篇综述中,我们总结了 MBD 的逐步诊断程序,并对 BDUC 的生物学特征提出了一些见解。
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引用次数: 0
White blood cells scattergram as a valuable tool for COVID-19 screening: A multicentric study 白细胞散点图作为 COVID-19 筛查的重要工具:一项多中心研究
IF 2.2 4区 医学 Q3 HEMATOLOGY Pub Date : 2024-03-04 DOI: 10.1111/ijlh.14257
Jennifer Osman, Cécile Gonnin, Jérome Lambert, Céline Behier, Nicolas Chapuis, Simon Chevalier, Jérôme Debus, Anne Delaval, Maxime Depoorter, Cécile Dumas, Amély Dumesges, Pascale Dussert, Corinne Ferrero Vacher, Frédérique Dubois-Galopin, Delphine Gerard, Pauline Gravière Bollotte, Geoffroy Guignedoux, Caroline Mayeur-Rousse, Delphine Mercier-Bataille, Emily Ronez, Catherine Trichet, Margaux Wiber, Victoria Raggueneau

Introduction

New tools have been developed to distinguish the COVID-19 diagnosis from other viral infections presenting similar symptomatology and mitigate the lack of sensitivity of molecular testing. We previously identified a specific “sandglass” aspect on the white blood cells (WBC) scattergram of COVID-19 patients, as a highly reliable COVID-19 screening test (sensitivity: 85.9%, specificity: 83.5% and positive predictive value: 94.3%). We then decided to validate our previous data in a multicentric study.

Methods

This retrospective study involved 817 patients with flu-like illness, among 20 centers, using the same CBC instrument (XN analyzer, SYSMEX, Japan). After training, one specialist per center independently evaluated, under the same conditions, the presence of the “sandglass” aspect of the WDF scattergram, likely representing plasmacytoid lymphocytes.

Results

Overall, this approach showed sensitivity: 59.0%, specificity: 72.9% and positive predictive value: 77.7%. Sensitivity improved with subgroup analysis, including in patients with lymphopenia (65.2%), patients presenting symptoms for more than 5 days (72.3%) and in patients with ARDS (70.1%). COVID-19 patients with larger plasmacytoid lymphocyte cluster (>15 cells) more often have severe outcomes (70% vs. 15% in the control group).

Conclusion

Our findings confirm that the WBC scattergram analysis could be added to a diagnostic algorithm for screening and quickly categorizing symptomatic patients as either COVID-19 probable or improbable, especially during COVID-19 resurgence and overlapping with future influenza epidemics. The observed large size of the plasmacytoid lymphocytes cluster appears to be a hallmark of COVID-19 patients and was indicative of a severe outcome. Furthers studies are ongoing to evaluate the value of the new hematological parameters in combination with WDF analysis.

导言:为了将 COVID-19 诊断与症状相似的其他病毒感染区分开来,并缓解分子检测灵敏度不足的问题,我们开发了新的工具。我们曾发现,COVID-19 患者白细胞散点图上的特异性 "沙镜 "是一种高度可靠的 COVID-19 筛查测试(灵敏度:85.9%,特异性:83.5%,阳性预测值:94.3%)。因此,我们决定在一项多中心研究中验证我们之前的数据:这项回顾性研究涉及 20 个中心的 817 名流感样疾病患者,使用相同的 CBC 仪器(XN 分析仪,日本 SYSMEX 公司)。经过培训后,每个中心由一名专家在相同的条件下独立评估 WDF 散点图中是否存在 "沙镜"(可能代表浆细胞淋巴细胞):总体而言,该方法的灵敏度为 59.0%,特异性为 72.9%,阳性预测值为 77.7%。通过亚组分析,包括淋巴细胞减少症患者(65.2%)、出现症状超过 5 天的患者(72.3%)和 ARDS 患者(70.1%)的灵敏度有所提高。COVID-19患者中浆细胞淋巴细胞群较大(>15个细胞)的患者更容易出现严重后果(70%对对照组的15%):我们的研究结果证实,白细胞散点图分析可添加到诊断算法中,用于筛查和快速将有症状的患者归类为可能感染 COVID-19 或不可能感染 COVID-19 的患者,尤其是在 COVID-19 复发期间以及与未来流感流行重叠期间。观察到的大体积浆细胞淋巴细胞簇似乎是 COVID-19 患者的特征,并预示着严重后果。目前正在进行进一步研究,以评估新血液学参数与 WDF 分析相结合的价值。
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引用次数: 0
A career in solving clinical-pathological conundrums: Heyde syndrome, anti-platelet factor 4 disorders, and microvascular limb ischemic necrosis 解决临床病理难题的职业生涯:海德综合征、抗血小板因子 4 疾病和微血管肢体缺血性坏死。
IF 3 4区 医学 Q3 HEMATOLOGY Pub Date : 2024-03-03 DOI: 10.1111/ijlh.14261
Theodore E. Warkentin

Hematology is a clinical specialty with strong roots in the laboratory; accordingly, the lab can help solve perplexing clinical problems. This review highlights clinical-pathological conundrums addressed during my 35-year hematology career at McMaster University. Heyde syndrome is the association between aortic stenosis and bleeding gastrointestinal (GI) angiodysplasia where the bleeding is usually cured by aortic valve replacement; the chance reading of a neonatal study showing reversible deficiency of high-molecular-weight (HMW) multimers of von Willebrand factor (vWF) following surgical correction of congenital heart disease provided the key insight that a subtle deficiency of HMW multimers of vWF explains Heyde syndrome. The unusual immunobiology of heparin-induced thrombocytopenia (HIT)—a highly prothrombotic, antibody-mediated, anti-platelet factor 4 (PF4) disorder featuring rapid appearance and then disappearance (seroreversion) of the pathological heparin-dependent platelet-activating antibodies—permitted identification of key clinical features that informed development of a scoring system (4Ts) to aid in HIT diagnosis. Atypical clinical presentations of HIT prompted identification of heparin-independent anti-PF4 antibodies, now recognized as the explanation for vaccine-induced immune thrombotic thrombocytopenia (VITT), as well as VITT-like disorders triggered by adenovirus infection. Another unusual feature of HIT is its strong association with limb ischemia, including limb necrosis secondary to deep-vein/microvascular thrombosis (venous limb gangrene). The remarkable observation that supratherapeutic warfarin anticoagulation predisposes to HIT- and cancer-associated venous limb gangrene provided insight into disturbed procoagulant/anticoagulant balance; these concepts are relevant to microvascular thrombosis in critical illness (symmetrical peripheral gangrene), including a pathophysiological role for proximate “shock liver” (impaired hepatic synthesis of natural anticoagulants).

血液学是一门扎根于实验室的临床专科;因此,实验室可以帮助解决令人困惑的临床问题。这篇综述重点介绍了我在麦克马斯特大学 35 年的血液学生涯中解决的临床病理难题。海德综合征(Heyde Syndrome)是主动脉瓣狭窄与胃肠道(GI)血管增生出血之间的关联,通常通过主动脉瓣置换术可治愈出血;一项新生儿研究显示,在先天性心脏病手术矫正后,von Willebrand 因子(vWF)的高分子量(HMW)多聚体出现可逆性缺乏,这项偶然的研究为我们提供了重要启示,即 vWF 的高分子量多聚体的微妙缺乏可解释海德综合征。肝素诱导的血小板减少症(HIT)是一种高度促血栓形成、抗体介导的抗血小板因子 4(PF4)疾病,其特点是病理肝素依赖性血小板激活抗体迅速出现,然后迅速消失(血清转换),这种不寻常的免疫生物学特性使人们能够识别关键的临床特征,并据此开发出一套评分系统(4Ts)来帮助诊断 HIT。HIT 的非典型临床表现促使人们发现了肝素依赖性抗 PF4 抗体,这种抗体现在被认为是疫苗诱发的免疫性血栓血小板减少症(VITT)以及腺病毒感染引发的 VITT 类疾病的原因。HIT 的另一个不寻常特征是与肢体缺血密切相关,包括继发于深静脉/微血管血栓形成的肢体坏死(静脉性肢体坏疽)。华法林超量抗凝治疗易导致 HIT 和癌症相关性静脉肢端坏疽,这一引人注目的观察结果让我们对紊乱的促凝剂/抗凝剂平衡有了深入了解;这些概念与危重病中的微血管血栓形成(对称性外周坏疽)相关,包括近端 "休克肝脏"(肝脏合成天然抗凝剂的能力受损)的病理生理学作用。
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引用次数: 0
Variability in combinations of APTT reagent and substrate plasma for a one-stage clotting assay to measure factor VIII products 用于测量因子 VIII 产品的单阶段凝血测定的 APTT 试剂和底物血浆组合的变异性。
IF 2.2 4区 医学 Q3 HEMATOLOGY Pub Date : 2024-03-01 DOI: 10.1111/ijlh.14258
Atsuo Suzuki, Nobuaki Suzuki, Takeshi Kanematsu, Shuichi Okamoto, Naruko Suzuki, Shogo Tamura, Ryosuke Kikuchi, Akira Katsumi, Tetsuhito Kojima, Tadashi Matsushita

Introduction

An investigation of the suitability of reagents for measuring FVIII products in a one-stage clotting assay (OSA) showed variations in their FVIII activity (FVIII:C). Most studies have focused on the activated partial thromboplastin time (APTT) reagent rather than FVIII-deficient plasma (F8DP), even though the APTT-based OSA is comprised of APTT reagents and factor-deficient plasma.

Aim

A single-centre study was conducted to clarify variations in measurements of FVIII products in an OSA using a total of 12 reagent combinations, including four APTT reagents and three types of F8DP.

Methods

FVIII:C in nine types of FVIII product-spiked plasma was measured using an OSA with four different APTT reagents and three types of F8DP.

Results

F8DP-dependent variations were found in addition to differences derived from APTT reagents. Variations in target recovery (TR) were observed for NovoEight®, Eloctate®, and Jivi®. Reduced TR for Jivi was found only for Pathromtin SL in combination with congenital F8DP (F8DP-3). This lower TR was not observed with alternative manufacturing lots of F8DP-3. The reduced TR for Jivi might be related to impaired contact activation due to lower factor XI activity in F8DP-3.

Conclusion

In addition to APTT reagents, variations in F8DPs used for OSAs can also affect FVIII:C results. F8DPs as well as the APTT reagent used for OSA should be chosen with caution, and laboratories should evaluate reagents for F8DPs as they currently do for APTT reagents, especially when lot changes occur.

导言:一项关于在单阶段凝血测定(OSA)中测定 FVIII 产物的试剂适用性的调查显示,这些试剂的 FVIII 活性(FVIII:C)存在差异。大多数研究的重点是活化部分凝血活酶时间(APTT)试剂,而不是 FVIII 缺乏血浆(F8DP),尽管基于 APTT 的 OSA 是由 APTT 试剂和因子缺乏血浆组成的。目的:我们进行了一项单中心研究,以澄清在使用 12 种试剂组合(包括 4 种 APTT 试剂和 3 种 F8DP)的 OSA 中 FVIII 产物测量值的变化:方法:使用 OSA 测量九种 FVIII 产品加标血浆中的 FVIII:C,其中包括四种不同的 APTT 试剂和三种 F8DP:结果:除了 APTT 试剂导致的差异外,还发现了 F8DP 导致的差异。观察到 NovoEight®、Eloctate® 和 Jivi® 的目标恢复(TR)存在差异。仅在 Pathromtin SL 与先天性 F8DP(F8DP-3)联合使用时发现 Jivi 的 TR 值降低。在使用其他生产批次的 F8DP-3 时,未发现 TR 降低的情况。Jivi 的 TR 值降低可能与 F8DP-3 中因子 XI 活性较低导致接触激活受损有关:除 APTT 试剂外,用于 OSA 的 F8DPs 的变化也会影响 FVIII:C 的结果。应谨慎选择 F8DPs 和用于 OSA 的 APTT 试剂,实验室应像目前评估 APTT 试剂一样评估 F8DPs 试剂,尤其是当批次发生变化时。
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引用次数: 0
Neutrophil to lymphocyte ratio and systemic immune-inflammatory index as markers of response to autologous hematopoietic stem cell transplantation in persons with multiple sclerosis 中性粒细胞与淋巴细胞比率和全身免疫炎症指数是多发性硬化症患者对自体造血干细胞移植反应的标志。
IF 2.2 4区 医学 Q3 HEMATOLOGY Pub Date : 2024-02-29 DOI: 10.1111/ijlh.14259
Guillermo Ocaña-Ramm, Moisés Manuel Gallardo-Pérez, Solón Javier Garcés-Eisele, Daniela Sánchez-Bonilla, Max Robles-Nasta, Edgar Jared Hernández-Flores, Luis Enrique Hamilton-Avilés, Paola Negrete-Rodríguez, Miranda Melgar-de-la-Paz, Olivia Lira-Lara, Juan Carlos Olivares-Gazca, Guillermo J. Ruiz-Delgado, Guillermo J. Ruiz-Argüelles

Introduction

Biomarkers that help to evaluate the immune system and could be useful in multiple sclerosis (MS) are the neutrophil to lymphocyte ratio (NLR), platelet to lymphocyte ratio (PLR), and systemic immune-inflammatory index (SII). The objective of this work is to evaluate the significance of the SII index, PLR, and NLR before and after transplantation in individuals with MS who underwent autologous hematopoietic stem cell transplant (aHSCT) at a single institution.

Methods

Patients with MS who received an aHSCT between 2017 and 2022 were included in the study. NLR, PLR, and SII index were calculated prior to the transplant and 100 days after, and evaluation of the expanded disability status scale (EDSS) was done before the transplant and 12 months after. The cohort was divided into two groups: aHSCT responders (R) and nonresponders (NR).

Results

Fifty-eight individuals were examined: 37 patients in the responders group R group and 21 in NR group. There was no statistically significant difference in the SII, NLR, and PLR prior to the transplant, however at 100 days post-HSCT, NLR in the R group was 1.8 versus 3.1 in the NR group (p = 0.003), PLR was 194 versus 295, respectively (p = 0.024), meanwhile SII index was 489.5 versus 729.3 (p < 0.001).

Conclusion

High NLR and SII index values after the aHSCT were associated with a worsening in the EDSS score. However, since this is the first ever study that compared NLR and SII index with the aHSCT response in persons with MS, further studies must be performed to corroborate this information.

导言:中性粒细胞与淋巴细胞比值(NLR)、血小板与淋巴细胞比值(PLR)和全身免疫炎症指数(SII)是有助于评估免疫系统的生物标志物,可用于多发性硬化症(MS)。这项工作的目的是评估在一家机构接受自体造血干细胞移植(aHSCT)的多发性硬化症患者在移植前后的SII指数、PLR和NLR的重要性:研究纳入了2017年至2022年期间接受过自体造血干细胞移植的多发性硬化症患者。在移植前和移植后100天计算NLR、PLR和SII指数,在移植前和移植后12个月评估扩大残疾状态量表(EDSS)。组群分为两组:aHSCT应答者(R)和非应答者(NR):结果:共有 58 人接受了检查:结果:共对 58 人进行了检查:37 人属于反应者组 R 组,21 人属于非反应者组。移植前,SII、NLR 和 PLR 没有统计学差异,但在移植后 100 天,R 组的 NLR 为 1.8,而 NR 组为 3.1(P = 0.003),PLR 分别为 194 和 295(P = 0.024),而 SII 指数分别为 489.5 和 729.3(P 结论:R 组和 NR 组的 NLR 和 SII 指数均较高:aHSCT 后高 NLR 和 SII 指数值与 EDSS 评分恶化有关。然而,由于这是首次将 NLR 和 SII 指数与多发性硬化症患者的 aHSCT 反应进行比较的研究,因此必须开展进一步的研究来证实这一信息。
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引用次数: 0
Evaluation of AQUIOS STEM, a novel method for automated CD34+ stem cell enumeration using flow cytometry 评估 AQUIOS STEM,这是一种利用流式细胞仪自动计数 CD34+ 干细胞的新方法。
IF 2.2 4区 医学 Q3 HEMATOLOGY Pub Date : 2024-02-29 DOI: 10.1111/ijlh.14253
Kim Callebaut, Eva Gijbels, Jonathan Vanbesien, Dries Deeren, Jan Van Droogenbroeck, Jan Emmerechts, Elisabeth Moreau

Objectives

Hematopoietic stem cell transplantation (HSCT) is a potentially curative treatment for various diseases. The measurement of CD34+ cells is crucial to schedule the peripheral blood stem cell collection and assess the engraftment potential of the apheresis product. The AQUIOS STEM system has been introduced as a novel application on the AQUIOS CL, a fully automated flow cytometer, for the enumeration of CD34+ hematopoietic progenitor cells (HPCs) in accordance with the The International Society for Hematotherapy and Graft Engineering guidelines. This study aimed to assess the potential of the novel AQUIOS STEM system versus currently used systems including the FACSCanto-II and the FACS Lyric flow cytometer in a multicenter study.

Methods

A total of 91 samples were used for the validation of the AQUOIS STEM system, including an analytical performance evaluation by means of assessing precision, sample stability, intersample carryover, and linearity and a method comparison with the present FACS systems in use to assess analytical and clinical decision agreement.

Results

Results showed excellent precision, with coefficient of variations <15% for dedicated quality control material and patient samples. There was no significant carry over. The fresh apheresis samples were stable when stored overnight at room temperature and at 4°C. Analytical comparison with the current systems demonstrated good correlation in peripheral blood, and minimal, clinically neglectable systematic and proportional bias in fresh apheresis products but a low correlation coefficient in cryopreserved products.

Conclusions

The STEM system on AQUIOS CL allows automated enumeration of CD34+ stem cells, demonstrating good analytical performance and promising overall outcomes in peripheral blood and fresh apheresis products.

目的:造血干细胞移植(HSCT)是一种可能治愈多种疾病的治疗方法。CD34+细胞的测量对于安排外周血干细胞采集和评估无细胞采集产品的移植潜力至关重要。AQUIOS STEM 系统是 AQUIOS CL(一种全自动流式细胞仪)上的一种新型应用,用于按照国际血液治疗和移植物工程学会的指南对 CD34+ 造血祖细胞(HPC)进行计数。本研究的目的是在一项多中心研究中评估新型 AQUIOS STEM 系统与目前使用的系统(包括 FACSCanto-II 和 FACS Lyric 流式细胞仪)相比的潜力:共使用了91个样本对AQUOIS STEM系统进行验证,包括通过评估精确度、样本稳定性、样本间携带率和线性度对分析性能进行评估,以及与目前使用的FACS系统进行方法比较,以评估分析和临床决策的一致性:结果:结果显示精确度极高,变异系数为结论:AQUIOS CL 上的 STEM 系统可自动计数 CD34+ 干细胞,在外周血和新鲜采血产品中表现出良好的分析性能和可喜的总体结果。
{"title":"Evaluation of AQUIOS STEM, a novel method for automated CD34+ stem cell enumeration using flow cytometry","authors":"Kim Callebaut,&nbsp;Eva Gijbels,&nbsp;Jonathan Vanbesien,&nbsp;Dries Deeren,&nbsp;Jan Van Droogenbroeck,&nbsp;Jan Emmerechts,&nbsp;Elisabeth Moreau","doi":"10.1111/ijlh.14253","DOIUrl":"10.1111/ijlh.14253","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>Hematopoietic stem cell transplantation (HSCT) is a potentially curative treatment for various diseases. The measurement of CD34+ cells is crucial to schedule the peripheral blood stem cell collection and assess the engraftment potential of the apheresis product. The AQUIOS STEM system has been introduced as a novel application on the AQUIOS CL, a fully automated flow cytometer, for the enumeration of CD34+ hematopoietic progenitor cells (HPCs) in accordance with the The International Society for Hematotherapy and Graft Engineering guidelines. This study aimed to assess the potential of the novel AQUIOS STEM system versus currently used systems including the FACSCanto-II and the FACS Lyric flow cytometer in a multicenter study.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>A total of 91 samples were used for the validation of the AQUOIS STEM system, including an analytical performance evaluation by means of assessing precision, sample stability, intersample carryover, and linearity and a method comparison with the present FACS systems in use to assess analytical and clinical decision agreement.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Results showed excellent precision, with coefficient of variations &lt;15% for dedicated quality control material and patient samples. There was no significant carry over. The fresh apheresis samples were stable when stored overnight at room temperature and at 4°C. Analytical comparison with the current systems demonstrated good correlation in peripheral blood, and minimal, clinically neglectable systematic and proportional bias in fresh apheresis products but a low correlation coefficient in cryopreserved products.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>The STEM system on AQUIOS CL allows automated enumeration of CD34+ stem cells, demonstrating good analytical performance and promising overall outcomes in peripheral blood and fresh apheresis products.</p>\u0000 </section>\u0000 </div>","PeriodicalId":14120,"journal":{"name":"International Journal of Laboratory Hematology","volume":"46 4","pages":"657-664"},"PeriodicalIF":2.2,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139992185","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
Blood smear invaders: About a fatal case of bacteremia 血涂片入侵者关于一例致命的菌血症。
IF 2.2 4区 医学 Q3 HEMATOLOGY Pub Date : 2024-02-26 DOI: 10.1111/ijlh.14256
Aurélien Bauduin, Marine Demoy, Franck Genevieve, Marie Tuffigo, Damien Luque Paz, Agathe Boussaroque
{"title":"Blood smear invaders: About a fatal case of bacteremia","authors":"Aurélien Bauduin,&nbsp;Marine Demoy,&nbsp;Franck Genevieve,&nbsp;Marie Tuffigo,&nbsp;Damien Luque Paz,&nbsp;Agathe Boussaroque","doi":"10.1111/ijlh.14256","DOIUrl":"10.1111/ijlh.14256","url":null,"abstract":"","PeriodicalId":14120,"journal":{"name":"International Journal of Laboratory Hematology","volume":"46 4","pages":"593-594"},"PeriodicalIF":2.2,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139975135","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
International Council for Standardization in Haematology technical report 2023: Renewal of the reference material for haemiglobincyanide 19-1-B308 for use in standardization of blood haemoglobin measurements 国际血液学标准化理事会第 2023 号技术报告:更新用于血红蛋白测量标准化的血红蛋白氰化物 19-1-B308 标准物质。
IF 3 4区 医学 Q3 HEMATOLOGY Pub Date : 2024-02-25 DOI: 10.1111/ijlh.14254
Cornelis L. Harteveld, Richard McCafferty, Terry Fawcett, Wendy N. Erber, International Council for the Standardization of Haematology (ICSH)
{"title":"International Council for Standardization in Haematology technical report 2023: Renewal of the reference material for haemiglobincyanide 19-1-B308 for use in standardization of blood haemoglobin measurements","authors":"Cornelis L. Harteveld,&nbsp;Richard McCafferty,&nbsp;Terry Fawcett,&nbsp;Wendy N. Erber,&nbsp;International Council for the Standardization of Haematology (ICSH)","doi":"10.1111/ijlh.14254","DOIUrl":"10.1111/ijlh.14254","url":null,"abstract":"","PeriodicalId":14120,"journal":{"name":"International Journal of Laboratory Hematology","volume":"46 3","pages":"575-576"},"PeriodicalIF":3.0,"publicationDate":"2024-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ijlh.14254","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139975136","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
期刊
International Journal of Laboratory Hematology
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