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Dimopoulos K, Tripodi A, Goetze JP. Laboratory investigation and diagnosis of thrombotic thrombocytopenic purpura. Crit Rev Clin Lab Sci 2023; 60:625-639. [PMID: 37452521 DOI: 10.1080/10408363.2023.2232039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 04/04/2023] [Accepted: 06/27/2023] [Indexed: 07/18/2023]
Abstract
Thrombotic thrombocytopenic purpura (TTP) is a rare and potentially fatal disease for which rapid diagnosis is crucial for patient outcomes. Deficient activity (< 10%) of the liver enzyme, ADAMTS13, is the pathophysiological hallmark of TTP, and measurement of the enzyme activity can establish the diagnosis of TTP with high accuracy. Thus, along with the clinical history, appropriate laboratory assessment of a suspected case of TTP is essential for diagnosis and treatment. Here, we present a review of the available laboratory tests that can assist clinicians in establishing the diagnosis of TTP, with special focus on ADAMTS13 assays, including the measurement of the antigen and activity, and detection of autoantibodies to ADAMTS13.
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Affiliation(s)
- Konstantinos Dimopoulos
- Department of Clinical Biochemistry, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Armando Tripodi
- IRCCS Maggiore Hospital Foundation, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Milano, Italy
| | - Jens P Goetze
- Department of Clinical Biochemistry, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
- Department of Biomedical Sciences, Faculty of Health, Copenhagen University, Copenhagen, Denmark
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Radhwi O, Badawi MA, Almarzouki A, Al-Ayoubi F, ElGohary G, Asfina KN, Basendwah AM, Alhazmi IA, Almahasnah EA, AlBahrani A, Raizah AA, Yahya A, Alshahrani K, Hindawi S. A Saudi multicenter experience on therapeutic plasma exchange for patients with thrombotic thrombocytopenic purpura: A call for national registry. J Clin Apher 2023; 38:573-581. [PMID: 37317696 DOI: 10.1002/jca.22067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 05/18/2023] [Accepted: 06/05/2023] [Indexed: 06/16/2023]
Abstract
BACKGROUND The improvement in the clinical care for patients with thrombotic thrombocytopenic purpura (TTP) is evolving, and many efforts are being put to standardize it. Here, we aimed to assess the provided care at a national level and identify deficiencies. METHODS A national Saudi retrospective descriptive study was carried out at six tertiary referral centers and included all patients who underwent therapeutic plasma exchange (TPE) for the diagnosis of TTP between May 2005, and July 2022. Collected information included demographic data, clinical features on presentation, and the results of laboratory investigations at admission and discharge. In addition, the number of TPE sessions, days till the first session of TPE, usage of immunological agents, and clinical outcomes were all collected. RESULTS One hundred patients were enrolled, predominantly female (56%). The mean age was 36.8 years. At diagnosis, 53% of patients showed neurological involvement. The mean platelet count at presentation was 21 × 109 /L. All patients had anemia (mean hematocrit 24.2%). Schistocytes were present in the peripheral blood film of all patients. The mean number of TPE rounds was 13 ± 9.3, and the mean days to start TPE since admission for the first episode was 2.5 days. ADAMTS13 level was measured in 48% of patients and was significantly low in 77% of them. Assessing for clinical TTP scores, 83%, 1000%, 64% of eligible patients had an intermediate/high PLASMIC, FRENCH, and Bentley scores, respectively. Caplacizumab was used on only one patient, and rituximab was administered to 37% of patients. A complete response for the first episode was achieved in 78% of patients. The overall mortality rate was 25%. Neither time to TPE, the use of rituximab or steroid affected survival. CONCLUSIONS Our study shows an excellent response to TPE with a survival rate approximate to the reported international literature. We observed a deficiency in using validated scoring systems in addition to confirming the disease by ADAMTS13 testing. This emphasizes the need for a national registry to facilitate proper diagnosis and management of this rare disorder.
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Affiliation(s)
- Osman Radhwi
- Department of Hematology, King Abdulaziz University, Jeddah, Saudi Arabia
- Hematology Research Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Maha A Badawi
- Department of Hematology, King Abdulaziz University, Jeddah, Saudi Arabia
- Hematology Research Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
- Blood Transfusion Services Unit, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Adel Almarzouki
- Department of Hematology, King Abdulaziz University, Jeddah, Saudi Arabia
- Hematology Research Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Fakhr Al-Ayoubi
- Department of Cardiac Sciences, King Fahad Cardiac Center, King Khalid University Hospital, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Ghada ElGohary
- Department of Adult Hematology/Oncology, King Saud University Medical City, King Saud University, Riyadh, Saudi Arabia
| | - Kazi Nur Asfina
- Department of Cardiac Sciences, King Fahad Cardiac Center, King Khalid University Hospital, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | | | - Iman Ayed Alhazmi
- Hematology and Oncology Division, Department of Medicine, King Fahad Armed Forces Hospital, Jeddah, Saudi Arabia
| | - Eiman A Almahasnah
- Adult Hematology Department, King Fahad Specialist Hospital, Dammam, Saudi Arabia
| | - Ahmed AlBahrani
- Department of Pathology and Laboratory Medicine, King Fahad Specialist Hospital Dammam, Dammam, Saudi Arabia
| | - Abdulrahman Al Raizah
- Division of Adult Hematology, Department of Oncology, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- King Abdullah International Medical Research Center, Saudi Society for Bone Marrow Transplant, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- Hematology Department, King Saud bin Abdulaziz University of Health Sciences, Riyadh, Saudi Arabia
| | - Ayel Yahya
- Division of Adult Hematology, Department of Oncology, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- Internal Medicine Department, King Khalid University, Abha, Saudi Arabia
| | - Khadeja Alshahrani
- Internal Medicine Department, Asser Central Hospital, Abha, Saudi Arabia
| | - Salwa Hindawi
- Department of Hematology, King Abdulaziz University, Jeddah, Saudi Arabia
- Hematology Research Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
- Blood Transfusion Services Unit, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
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Siniard RC, Gangaraju R, May JE, Marques MB. Challenges in the diagnosis of thrombotic thrombocytopenic purpura. Expert Rev Hematol 2023; 16:861-869. [PMID: 37767808 DOI: 10.1080/17474086.2023.2265058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 09/26/2023] [Indexed: 09/29/2023]
Abstract
INTRODUCTION Immune-mediated TTP (iTTP) is a rare condition without pathognomonic signs and symptoms. For this reason, the diagnosis of iTTP may be delayed or even missed, with potentially catastrophic consequences. AREAS COVERED The authors performed an extensive literature review on the diagnosis of iTTP and its challenges combined with their own experience in a referral center for patients with iTTP. EXPERT OPINION Although a definitive diagnosis of iTTP depends on the ADAMTS13 activity result, timely testing is rarely available at many centers to which patients present. If less complex tests were to become available, they would decrease the chances of late and/or missed diagnoses of iTTP throughout the world. While clinical scores to estimate the likelihood of iTTP exist, they are not well known, and can be misleading if used in the wrong context. Furthermore, the three scoring systems (PLASMIC, Bentley, and French) only moderately correlate with each other, which further complicates the landscape. The existence of these scores and how they should be used in practice is but one opportunity that can be seized through more robust programs to educate nonspecialist clinicians on how to recognize and treat patients with iTTP.
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Affiliation(s)
- Rance C Siniard
- Department of Pathology, Division of Laboratory Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Radhika Gangaraju
- Department of Medicine, Division of Hematology Oncology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jori E May
- Department of Medicine, Division of Hematology Oncology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Marisa B Marques
- Department of Pathology, Division of Laboratory Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
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Woods AI, Paiva J, Dos Santos C, Alberto MF, Sánchez-Luceros A. From the Discovery of ADAMTS13 to Current Understanding of Its Role in Health and Disease. Semin Thromb Hemost 2023; 49:284-294. [PMID: 36368692 DOI: 10.1055/s-0042-1758059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ADAMTS13 (a disintegrin-like metalloprotease domain with thrombospondin type 1 motif, member 13) is a protease of crucial importance in the regulation of the size of von Willebrand factor multimers. Very low ADAMTS13 activity levels result in thrombotic thrombocytopenic purpura, a rare and life-threatening disease. The mechanisms involved can either be acquired (immune-mediated thrombotic thrombocytopenic purpura [iTTP]) or congenital (cTTP, Upshaw-Schulman syndrome) caused by the autosomal recessive inheritance of disease-causing variants (DCVs) located along the ADAMTS13 gene, which is located in chromosome 9q34. Apart from its role in TTP, and as a regulator of microthrombosis, ADAMTS13 has begun to be identified as a prognostic and/or diagnostic marker of other diseases, such as those related to inflammatory processes, liver damage, metastasis of malignancies, sepsis, and different disorders related to angiogenesis. Since its first description almost 100 years ago, the improvement of laboratory tests and the description of novel DCVs along the ADAMTS13 gene have contributed to a better and faster diagnosis of patients under critical conditions. The ability of ADAMTS13 to dissolve platelet aggregates in vitro and its antithrombotic properties makes recombinant human ADAMTS13 treatment a potential therapeutic approach targeting not only patients with cTTP but also other medical conditions.
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Affiliation(s)
- Adriana Inés Woods
- Laboratorio de Hemostasia y Trombosis, IMEX-CONICET-Academia Nacional de Medicina de Buenos Aires, CABA, Argentina
| | - Juvenal Paiva
- Departamento de Hemostasia y Trombosis, Instituto de Investigaciones Hematológicas, Academia Nacional de Medicina de Buenos Aires, CABA, Argentina
| | - Celia Dos Santos
- Laboratorio de Hemostasia y Trombosis, IMEX-CONICET-Academia Nacional de Medicina de Buenos Aires, CABA, Argentina
| | - María Fabiana Alberto
- Departamento de Hemostasia y Trombosis, Instituto de Investigaciones Hematológicas, Academia Nacional de Medicina de Buenos Aires, CABA, Argentina
| | - Analía Sánchez-Luceros
- Laboratorio de Hemostasia y Trombosis, IMEX-CONICET-Academia Nacional de Medicina de Buenos Aires, CABA, Argentina.,Departamento de Hemostasia y Trombosis, Instituto de Investigaciones Hematológicas, Academia Nacional de Medicina de Buenos Aires, CABA, Argentina
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Lee CH, Huang YC, Li SS, Hsu YT, Chen YP, Chen TY. Application of PLASMIC Score in Risk Prediction of Thrombotic Thrombocytopenic Purpura: Real-World Experience From a Tertiary Medical Center in Taiwan. Front Med (Lausanne) 2022; 9:893273. [PMID: 35615090 PMCID: PMC9124890 DOI: 10.3389/fmed.2022.893273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 04/07/2022] [Indexed: 11/23/2022] Open
Abstract
Thrombotic thrombocytopenic purpura (TTP) is a life-threatening disorder caused by severe ADAMTS13 (a disintegrin and metalloprotease with thrombospondin type 1 repeats, member 13) deficiency (activity <10%). Urgent intervention based on the timely evaluation of ADAMTS13 level is crucial to guide optimal therapy. The recently developed PLASMIC score based on seven items allows the rapid identification of patients at high risk for TTP due to severe ADAMTS13 deficiency. This retrospective study included 31 hospitalized patients with suspicious thrombotic microangiopathy in National Cheng Kung University Hospital from December 2016 to July 2021. Data on ADAMTS13 activity and medical and laboratory information were retrieved from medical records. The PLASMIC score could be calculated in 24 of the 31 patients with available data, and the final cohort was stratified according to the 7-point PLASMIC score. All patients with high PLASMIC score (6-7) exhibited severe ADAMTS13 deficiency (activity ≤10%). One patient with a brain tumor and a PLASMIC score of 6 did not have severe ADAMTS13 activity of ≤10%. The patients in the intermediate- and low risk groups (PLASMIC scores of 5 and 0-4, respectively) exhibited ADAMTS13 activities of above 10%. Given the role of prompt diagnosis in the timely delivery of appropriate therapy, these findings confirm and strengthen the predictive value of the PLASMIC score in patients at high risk for TTP due to severe ADAMTS13 deficiency.
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Affiliation(s)
- Chun-Hui Lee
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Division of Hematology, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yi-Ching Huang
- Department of Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Division of Hematology, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Sin-Syue Li
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Division of Hematology, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ya-Ting Hsu
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Division of Hematology, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ya-Ping Chen
- Division of Hematology, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Tsai-Yun Chen
- Division of Hematology, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Center for Cell Therapy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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Karsenty CL, Kirk SE, Helber HL, Esquilin JM, Despotovic JM, Grimes AB. Molecular Diagnosis Is Vital to the Accurate Classification and Management of Thrombotic Thrombocytopenic Purpura in Children. Front Immunol 2022; 13:836960. [PMID: 35479064 PMCID: PMC9038040 DOI: 10.3389/fimmu.2022.836960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 03/10/2022] [Indexed: 11/13/2022] Open
Abstract
Thrombotic thrombocytopenic purpura (TTP) is a rare but potentially life-threatening hematologic disease, presenting a myriad of diagnostic and management challenges in children. Here, we provide a review of this disorder and discuss 2 exemplary cases of TTP occurring in adolescents, emphasizing the need for consideration of late-onset congenital TTP (cTTP). We demonstrate the importance of early confirmation of ADAMTS13 enzyme deficiency and the presence or absence of ADAMTS13 inhibitor in order to rapidly initiate the appropriate life-saving therapies. Ultimately, molecular testing is paramount to distinguishing between congenital and acquired immune-mediated TTP.
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Affiliation(s)
- Cecile L. Karsenty
- Department of Pediatrics, Section of Hematology/Oncology, Baylor College of Medicine, Houston, TX, United States
- Texas Children’s Cancer and Hematology Centers, Texas Children's Hospital, Houston, TX, United States
- *Correspondence: Cecile L. Karsenty,
| | - Susan E. Kirk
- Department of Pediatrics, Section of Hematology/Oncology, Baylor College of Medicine, Houston, TX, United States
- Texas Children’s Cancer and Hematology Centers, Texas Children's Hospital, Houston, TX, United States
| | - Hannah L. Helber
- Department of Pediatrics, Section of Hematology/Oncology, Baylor College of Medicine, Houston, TX, United States
- Texas Children’s Cancer and Hematology Centers, Texas Children's Hospital, Houston, TX, United States
| | - Jose M. Esquilin
- Methodist Children’s Hospital, San Antonio, TX, United States
- Methodist Physicians Pediatric Specialists of Texas, San Antonio, TX, United States
| | - Jenny M. Despotovic
- Department of Pediatrics, Section of Hematology/Oncology, Baylor College of Medicine, Houston, TX, United States
- Texas Children’s Cancer and Hematology Centers, Texas Children's Hospital, Houston, TX, United States
| | - Amanda B. Grimes
- Department of Pediatrics, Section of Hematology/Oncology, Baylor College of Medicine, Houston, TX, United States
- Texas Children’s Cancer and Hematology Centers, Texas Children's Hospital, Houston, TX, United States
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Graça NAG, Joly BS, Voorberg J, Vanhoorelbeke K, Béranger N, Veyradier A, Coppo P. TTP: From empiricism for an enigmatic disease to targeted molecular therapies. Br J Haematol 2022; 197:156-170. [PMID: 35146746 PMCID: PMC9304236 DOI: 10.1111/bjh.18040] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/29/2021] [Accepted: 12/31/2021] [Indexed: 12/19/2022]
Abstract
The 100th anniversary of the first description of Thrombotic Thrombocytopenic Purpura (TTP) as a disease by Dr. Eli Moschcowitz approaches. For many decades, TTP remained mostly a mysterious fatal condition, where diagnosis was often post-mortem. Initially a pentad of symptoms was identified, a pattern that later revealed to be fallible. Sporadic observations led to empiric interventions that allowed for the first impactful breakthrough in TTP treatment, almost 70 years after its first description: the introduction of plasma exchange and infusions as treatments. The main body of knowledge within the field was gathered in the latest three decades: patient registries were set and proved crucial for advancements; the general mechanisms of disease have been described; the diagnosis was refined; new treatments and biomarkers with improvements on prognosis and management were introduced. Further changes and improvements are expected in the upcoming decades. In this review, we provide a brief historic overview of TTP, as an illustrative example of the success of translational medicine enabling to rapidly shift from a management largely based on empiricism to targeted therapies and personalized medicine, for the benefit of patients. Current management options and present and future perspectives in this still evolving field are summarized.
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Affiliation(s)
- Nuno A. G. Graça
- Department of Molecular Hematology, Sanquin‐Academic Medical CenterLandsteiner LaboratoryAmsterdamThe Netherlands
| | - Bérangère S. Joly
- Service d'hématologie biologique and EA3518‐ Institut universitaire d'hématologieGroupe Hospitalier Saint Louis‐Lariboisière, AP‐HP, Université Paris DiderotParisFrance
- Centre de Référence des Microangiopathies ThrombotiquesHôpital Saint‐Antoine, AP‐HPParisFrance
| | - Jan Voorberg
- Department of Molecular Hematology, Sanquin‐Academic Medical CenterLandsteiner LaboratoryAmsterdamThe Netherlands
- Department of Experimental Vascular MedicineAmsterdam UMCAmsterdamThe Netherlands
| | - Karen Vanhoorelbeke
- Laboratory for Thrombosis Research, IRF Life SciencesKU Leuven Campus Kulak KortrijkKortrijkBelgium
| | - Nicolas Béranger
- Service d'hématologie biologique and EA3518‐ Institut universitaire d'hématologieGroupe Hospitalier Saint Louis‐Lariboisière, AP‐HP, Université Paris DiderotParisFrance
- Centre de Référence des Microangiopathies ThrombotiquesHôpital Saint‐Antoine, AP‐HPParisFrance
| | - Agnès Veyradier
- Service d'hématologie biologique and EA3518‐ Institut universitaire d'hématologieGroupe Hospitalier Saint Louis‐Lariboisière, AP‐HP, Université Paris DiderotParisFrance
- Centre de Référence des Microangiopathies ThrombotiquesHôpital Saint‐Antoine, AP‐HPParisFrance
| | - Paul Coppo
- Centre de Référence des Microangiopathies ThrombotiquesHôpital Saint‐Antoine, AP‐HPParisFrance
- Service d'HématologieHôpital Saint‐Antoine, AP‐HPParisFrance
- Sorbonne UniversitéUPMC Univ ParisParisFrance
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Baysal M, Ümit E, Kırkızlar HO, Demir AM. Comparison of Clinical Scoring Systems in the Management of Patients with Microangiopathic Hemolytic Anemia and Thrombocytopenia. Turk J Haematol 2021; 38:64-68. [PMID: 33161686 PMCID: PMC7927454 DOI: 10.4274/tjh.galenos.2020.2020.0348] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Objective: Several clinical scoring systems have been developed for the differential diagnosis of thrombotic microangiopathies (TMAs), all to predict and identify patients with ADAMTS13 deficiency and to start treatment as soon as possible. The first scoring system in this regard was the Bentley score, and the French score and PLASMIC score were developed afterwards. Materials and Methods: We aimed to evaluate the laboratory parameters and clinical features of patients who underwent plasma exchange with a prediagnosis of TTP at our clinic between 2007 and 2019 and whose ADAMTS13 enzyme levels were measured and to compare the findings with the scoring systems. Results: Data of 35 patients were evaluated. Twelve patients were evaluated as high risk according to all three scoring systems. A statistically significant relation was observed between all three scoring systems and ADAMTS13 levels. Conclusion: A moderate correlation was found between all three scoring systems and ADAMTS13 levels. We observed similar potential strength of all three scoring systems to predict TTP among other TMAs and we conclude that they are applicable in daily practice.
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Affiliation(s)
- Mehmet Baysal
- Trakya University Faculty of Medicine, Department of Hematology, Edirne, Turkey
| | - Elif Ümit
- Trakya University Faculty of Medicine, Department of Hematology, Edirne, Turkey
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Yoon J, Lee S, Sun CH, Kim D, Kim I, Yoon SS, Oh D, Yun H, Koh Y. MED-TMA: A clinical decision support tool for differential diagnosis of TMA with enhanced accuracy using an ensemble method. Thromb Res 2020; 193:154-159. [PMID: 32622194 DOI: 10.1016/j.thromres.2020.06.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 06/22/2020] [Accepted: 06/25/2020] [Indexed: 11/25/2022]
Abstract
Considering difficulties in on-site ADAMTS13 testing and the performance instability of PLASMIC score according to ethnicity, we developed a prediction tool, MED-TMA (machine learning (ML) method for differential diagnosis (DDx) of thrombotic microangiopathy (TMA)) to support clinical decision. Data from 319 patients visiting 31 hospitals in Korea clinically diagnosed with primary TMA was randomly separated by 2:1 into two groups - the development dataset (D-set, n = 212), the validation dataset (V-set, n = 107). Feature elimination was conducted to select optimal clinical predictors. We developed the model with the selected features using ML methods, verifying using V-set. After the feature elimination using 19 clinical variables, five variables were selected with high importance value. Among nine ML methods, four ML methods were chosen considering the Area Under the Curves (AUC) and the correlation between the methods using D-set. We developed MED-TMA based on an optimized ensemble model with the selected four ML methods resulting in AUC values of 0.945 and 0.924 in D-set and V-set, respectively. In addition to the binary outcome, MED-TMA was capable of providing a probability for DDx of TMA. The ensemble approach driven MED-TMA showed comparable accurate and intuitive decision support for DDx of TMA to that of the existing models based on a single ML method. We provide a web-based nomogram for the appropriate use of effective but costly therapeutics to treat TMA patients (http://hematology.snu.ac.kr/medtma/).
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Affiliation(s)
- Jeesun Yoon
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Sungyoung Lee
- Center for Precision Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | | | - Daeyoon Kim
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Inho Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea; Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Sung-Soo Yoon
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea; Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Doyeun Oh
- CHA University school of Medicine, Seongnam, Republic of Korea.
| | - Hongseok Yun
- Center for Precision Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
| | - Youngil Koh
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea; Center for Precision Medicine, Seoul National University Hospital, Seoul, Republic of Korea; Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea; Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea.
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Moosavi H, Ma Y, Miller MJ, Duncan A. Validation of PLASMIC score: an academic medical center case series (2012-present). Transfusion 2020; 60:1536-1543. [PMID: 32588918 DOI: 10.1111/trf.15916] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 04/20/2020] [Accepted: 04/23/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND The PLASMIC score is a rapid and inexpensive tool for predicting severe ADAMTS13 deficiency (activity <10%) in patients with suspected thrombotic thrombocytopenic purpura (TTP) by analyzing seven parameters (platelet count; combined hemolysis variable; absence of active neoplasia; absence of an organ or stem-cell transplant; mean corpuscular value; international normalized ratio; and serum creatinine). The purpose of this study was to validate the PLASMIC score at a large multi-institutional academic medical center. METHODS An internal database of consultations to the transfusion medicine service, which oversees therapeutic apheresis at our institution, was reviewed to identify patients who were evaluated for and/or received plasma exchange for suspected TTP. These consultations covered the time period of January 2012 to February 2019. PLASMIC scoring criteria and ADAMTS13 assay results were abstracted from the electronic medical record, the PLASMIC score was calculated, and cases stratified into risk categories (low, intermediate, high risk) based on the score value. RESULTS Of 58 patients identified, 46 met inclusion criteria, and 27 demonstrated ADAMTS13 activity <10%. Correlation of severe ADAMTS13 deficiency with risk-stratified groups resulted in 78% sensitivity, 63% specificity, 75% positive predictive value (PPV), and 67% negative predictive value (NPV). DISCUSSION These findings paralleled those from validation studies performed at other institutions. They provided insufficient evidence to recommend routine use of the PLASMIC score to rule out TTP among patients at our hospitals. Nonetheless, these results reinforce the importance of early ADAMTS13 testing as a diagnostic triage tool for patients with suspected TTP.
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Affiliation(s)
- Harrison Moosavi
- Department of Pathology and Laboratory Medicine, Center for Transfusion and Cellular Therapies, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Yamin Ma
- Department of Pathology and Laboratory Medicine, Center for Transfusion and Cellular Therapies, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Maureen J Miller
- Department of Pathology and Laboratory Medicine, Center for Transfusion and Cellular Therapies, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Alexander Duncan
- Department of Pathology and Laboratory Medicine, Center for Transfusion and Cellular Therapies, Emory University School of Medicine, Atlanta, Georgia, USA
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11
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Gui RY, Huang QS, Cai X, Wu J, Liu HX, Liu Y, Yang LH, Zhang JY, Cheng YF, Jiang M, Mao M, Fang MY, Liu H, Wang LR, Wang Z, Zhou HB, Lan H, Jiang ZX, Shen XL, Zhang L, Fan SJ, Li Y, Wang QF, Huang XJ, Zhang XH. Development and validation of a prediction model (AHC) for early identification of refractory thrombotic thrombocytopenic purpura using nationally representative data. Br J Haematol 2020; 191:269-281. [PMID: 32452543 DOI: 10.1111/bjh.16767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 04/30/2020] [Indexed: 02/06/2023]
Abstract
Immune-mediated thrombotic thrombocytopenic purpura (iTTP) is a rare and life-threatening haematological emergency. Although therapeutic plasma exchange together with corticosteroids achieve successful outcomes, a considerable number of patients remain refractory to this treatment and require early initiation of intensive therapy. However, a method for the early identification of refractory iTTP is not available. To develop and validate a model for predicting the probability of refractory iTTP, a cohort of 265 consecutive iTTP patients from 17 large medical centres was retrospectively identified. The derivation cohort included 94 patients from 11 medical centres. For the validation cohort, we included 40 patients from the other six medical centres using geographical validation. An easy-to-use risk score system was generated, and its performance was assessed using internal and external validation cohorts. In the multivariable logistic analysis of the derivation cohort, three candidate predictors were entered into the final prediction model: age, haemoglobin and creatinine. The prediction model had an area under the curve of 0.886 (95% CI: 0.679-0.974) in the internal validation cohort and 0.862 (95% CI: 0.625-0.999) in the external validation cohort. The calibration plots showed a high agreement between the predicted and observed outcomes. In conclusion, we developed and validated a highly accurate prediction model for the early identification of refractory iTTP. It has the potential to guide tailored therapy and is a step towards more personalized medicine.
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Affiliation(s)
- Ruo-Yun Gui
- Peking University People's Hospital, Peking University Institute of Hematology, Beijing, China.,National Clinical Research Center for Hematologic Disease, Beijing, China.,Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Center of Hematology, Peking University, Beijing, China
| | - Qiu-Sha Huang
- Peking University People's Hospital, Peking University Institute of Hematology, Beijing, China.,National Clinical Research Center for Hematologic Disease, Beijing, China.,Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Center of Hematology, Peking University, Beijing, China
| | - Xuan Cai
- Peking University People's Hospital, Peking University Institute of Hematology, Beijing, China.,National Clinical Research Center for Hematologic Disease, Beijing, China.,Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Center of Hematology, Peking University, Beijing, China
| | - Jin Wu
- Peking University People's Hospital, Peking University Institute of Hematology, Beijing, China.,National Clinical Research Center for Hematologic Disease, Beijing, China.,Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Center of Hematology, Peking University, Beijing, China
| | - Hui-Xin Liu
- Department of Clinical Epidemiology, Peking University People's Hospital, Beijing, China
| | - Yi Liu
- Department of Hematology, Navy General Hospital, Beijing, China
| | - Lin-Hua Yang
- Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Jing-Yu Zhang
- The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Yun-Feng Cheng
- Qingpu Branch of Zhongshan Hospital, Fudan University, Shanghai, China
| | | | - Min Mao
- Department of Hematology, People's Hospital of Xinjiang Uygur Autonomous Region, Xinjiang Uygur Autonomous Region, China
| | - Mei-Yun Fang
- Zhongshan Hospital Affiliated to Dalian University, Dalian, China
| | - Hui Liu
- Department of Hematology, Beijing Hospital, Beijing, China
| | - Li-Ru Wang
- Department of Hematology, Fu Xing Hospital, Capital Medical University, Beijing, China
| | - Zhao Wang
- Department of Hematology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - He-Bing Zhou
- Department of Hematology, Beijing LuHe Hospital, Capital Medical University, Beijing, China
| | - Hai Lan
- Department of Hematology, ShunDe Hospital of GuangZhou University of Chinese Medicine, GuangZhou, China
| | - Zhong-Xing Jiang
- Department of Hematology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xu-Liang Shen
- Department of Hematology, He Ping Central Hospital of the Changzhi Medical College, Changzhi, China
| | - Lei Zhang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China
| | - Sheng-Jin Fan
- The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yueying Li
- CAS Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.,China National Center for Bioinformation, Beijing, China
| | - Qian-Fei Wang
- CAS Key Laboratory of Genomic and Precision Medicine, Collaborative Innovation Center of Genetics and Development, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China.,China National Center for Bioinformation, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xiao-Jun Huang
- Peking University People's Hospital, Peking University Institute of Hematology, Beijing, China.,National Clinical Research Center for Hematologic Disease, Beijing, China.,Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Center of Hematology, Peking University, Beijing, China
| | - Xiao-Hui Zhang
- Peking University People's Hospital, Peking University Institute of Hematology, Beijing, China.,National Clinical Research Center for Hematologic Disease, Beijing, China.,Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China.,Collaborative Innovation Center of Hematology, Peking University, Beijing, China
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12
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Manrique-Caballero CL, Peerapornratana S, Formeck C, Del Rio-Pertuz G, Gomez Danies H, Kellum JA. Typical and Atypical Hemolytic Uremic Syndrome in the Critically Ill. Crit Care Clin 2020; 36:333-356. [PMID: 32172817 DOI: 10.1016/j.ccc.2019.11.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Hemolytic uremic syndrome is characterized by microangiopathic hemolytic anemia, thrombocytopenia, and acute kidney injury. Disseminated intravascular coagulation, thrombotic thrombocytopenic purpura, and hemolytic uremic syndrome have a similar clinical presentation. Diagnostic needs to be prompt to decrease mortality, because identifying the different disorders can help to tailor specific, effective therapies. However, diagnosis is challenging and morbidity and mortality remain high, especially in the critically ill population. Development of clinical prediction scores and rapid diagnostic tests for hemolytic uremic syndrome based on mechanistic knowledge are needed to facilitate early diagnosis and assign timely specific treatments to patients with hemolytic uremic syndrome variants.
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Affiliation(s)
- Carlos L Manrique-Caballero
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Avenue Suite 220, Pittsburgh, PA 15213, USA; The CRISMA (Clinical Research, Investigation and Systems Modeling of Acute Illness) Center, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3550 Terrace Street, Scaife Hall, Suite 600, Pittsburgh, PA 15213, USA
| | - Sadudee Peerapornratana
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Avenue Suite 220, Pittsburgh, PA 15213, USA; The CRISMA (Clinical Research, Investigation and Systems Modeling of Acute Illness) Center, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3550 Terrace Street, Scaife Hall, Suite 600, Pittsburgh, PA 15213, USA; Excellence Center for Critical Care Nephrology, Division of Nephrology, Department of Medicine, Chulalongkorn University, 1873 Rama 4 Road, Pathumwan, Bangkok 10330, Thailand; Department of Laboratory Medicine, Chulalongkorn University, 1873 Rama 4 Road, Pathumwan, Bangkok 10330, Thailand
| | - Cassandra Formeck
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Avenue Suite 220, Pittsburgh, PA 15213, USA; The CRISMA (Clinical Research, Investigation and Systems Modeling of Acute Illness) Center, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3550 Terrace Street, Scaife Hall, Suite 600, Pittsburgh, PA 15213, USA; Department of Nephrology, Children's Hospital of Pittsburgh of UPMC, 4401 Penn Avenue, Floor 3, Pittsburgh, PA 15224, USA
| | - Gaspar Del Rio-Pertuz
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Avenue Suite 220, Pittsburgh, PA 15213, USA; The CRISMA (Clinical Research, Investigation and Systems Modeling of Acute Illness) Center, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3550 Terrace Street, Scaife Hall, Suite 600, Pittsburgh, PA 15213, USA
| | - Hernando Gomez Danies
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Avenue Suite 220, Pittsburgh, PA 15213, USA; The CRISMA (Clinical Research, Investigation and Systems Modeling of Acute Illness) Center, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3550 Terrace Street, Scaife Hall, Suite 600, Pittsburgh, PA 15213, USA
| | - John A Kellum
- Center for Critical Care Nephrology, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3347 Forbes Avenue Suite 220, Pittsburgh, PA 15213, USA; The CRISMA (Clinical Research, Investigation and Systems Modeling of Acute Illness) Center, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, 3550 Terrace Street, Scaife Hall, Suite 600, Pittsburgh, PA 15213, USA.
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13
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Joseph A, Cointe A, Mariani Kurkdjian P, Rafat C, Hertig A. Shiga Toxin-Associated Hemolytic Uremic Syndrome: A Narrative Review. Toxins (Basel) 2020; 12:E67. [PMID: 31973203 PMCID: PMC7076748 DOI: 10.3390/toxins12020067] [Citation(s) in RCA: 100] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 01/13/2020] [Accepted: 01/17/2020] [Indexed: 01/28/2023] Open
Abstract
The severity of human infection by one of the many Shiga toxin-producing Escherichia coli (STEC) is determined by a number of factors: the bacterial genome, the capacity of human societies to prevent foodborne epidemics, the medical condition of infected patients (in particular their hydration status, often compromised by severe diarrhea), and by our capacity to devise new therapeutic approaches, most specifically to combat the bacterial virulence factors, as opposed to our current strategies that essentially aim to palliate organ deficiencies. The last major outbreak in 2011 in Germany, which killed more than 50 people in Europe, was evidence that an effective treatment was still lacking. Herein, we review the current knowledge of STEC virulence, how societies organize the prevention of human disease, and how physicians treat (and, hopefully, will treat) its potentially fatal complications. In particular, we focus on STEC-induced hemolytic and uremic syndrome (HUS), where the intrusion of toxins inside endothelial cells results in massive cell death, activation of the coagulation within capillaries, and eventually organ failure.
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Affiliation(s)
- Adrien Joseph
- Department of Nephrology, AP-HP, Hôpital Tenon, F-75020 Paris, France; (A.J.); (C.R.)
| | - Aurélie Cointe
- Department of Microbiology, AP-HP, Hôpital Robert Debré, F-75019 Paris, France; (A.C.); (P.M.K.)
| | | | - Cédric Rafat
- Department of Nephrology, AP-HP, Hôpital Tenon, F-75020 Paris, France; (A.J.); (C.R.)
| | - Alexandre Hertig
- Department of Renal Transplantation, Sorbonne Université, AP-HP, Hôpital Pitié Salpêtrière, F-75013 Paris, France
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14
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Zhao N, Zhou L, Hu X, Sun G, Chen C, Fan X, Zhou S, Tao X, Liu H, Zheng C. A modified PLASMIC score including the lactate dehydrogenase/the upper limit of normal ratio more accurately identifies Chinese thrombotic thrombocytopenic purpura patients than the original PLASMIC score. J Clin Apher 2019; 35:79-85. [PMID: 31724781 DOI: 10.1002/jca.21760] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 09/16/2019] [Accepted: 10/23/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Na Zhao
- Department of Hematology, The First Affiliated Hospital of USTCDivision of Life Sciences and Medicine, University of Science and Technology of China Hefei China
| | - Li Zhou
- Department of Hematology, The First Affiliated Hospital of USTCDivision of Life Sciences and Medicine, University of Science and Technology of China Hefei China
| | - Xing Hu
- Department of Hematology, The First Affiliated Hospital of USTCDivision of Life Sciences and Medicine, University of Science and Technology of China Hefei China
| | - Guangyu Sun
- Department of Hematology, The First Affiliated Hospital of USTCDivision of Life Sciences and Medicine, University of Science and Technology of China Hefei China
| | - Cui Chen
- Department of Intensive Care Unit, The First Affiliated Hospital of USTCDivision of Life Sciences and Medicine, University of Science and Technology of China Hefei China
| | - Xiaoqin Fan
- Department of Intensive Care Unit, The First Affiliated Hospital of USTCDivision of Life Sciences and Medicine, University of Science and Technology of China Hefei China
| | - Shusheng Zhou
- Department of Intensive Care Unit, The First Affiliated Hospital of USTCDivision of Life Sciences and Medicine, University of Science and Technology of China Hefei China
| | - Xiaogen Tao
- Department of Intensive Care Unit, The First Affiliated Hospital of USTCDivision of Life Sciences and Medicine, University of Science and Technology of China Hefei China
| | - Huilan Liu
- Department of Hematology, The First Affiliated Hospital of USTCDivision of Life Sciences and Medicine, University of Science and Technology of China Hefei China
| | - Changcheng Zheng
- Department of Hematology, The First Affiliated Hospital of USTCDivision of Life Sciences and Medicine, University of Science and Technology of China Hefei China
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15
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Azoulay E, Bauer PR, Mariotte E, Russell L, Knoebl P, Martin-Loeches I, Pène F, Puxty K, Povoa P, Barratt-Due A, Garnacho-Montero J, Wendon J, Munshi L, Benoit D, von Bergwelt-Baildon M, Maggiorini M, Coppo P, Cataland S, Veyradier A, Van de Louw A. Expert statement on the ICU management of patients with thrombotic thrombocytopenic purpura. Intensive Care Med 2019; 45:1518-1539. [PMID: 31588978 DOI: 10.1007/s00134-019-05736-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 08/07/2019] [Indexed: 12/11/2022]
Abstract
Thrombotic thrombocytopenic purpura (TTP) is fatal in 90% of patients if left untreated and must be diagnosed early to optimize patient outcomes. However, the very low incidence of TTP is an obstacle to the development of evidence-based clinical practice recommendations, and the very wide variability in survival rates across centers may be partly ascribable to differences in management strategies due to insufficient guidance. We therefore developed an expert statement to provide trustworthy guidance about the management of critically ill patients with TTP. As strong evidence was difficult to find in the literature, consensus building among experts could not be reported for most of the items. This expert statement is timely given the recent advances in the treatment of TTP, such as the use of rituximab and of the recently licensed drug caplacizumab, whose benefits will be maximized if the other components of the management strategy follow a standardized pattern. Finally, unanswered questions are identified as topics of future research on TTP.
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Affiliation(s)
- Elie Azoulay
- Centre National Maladie rare des Microangiopathies Thrombotiques, Médecine Intensive et Réanimation, APHP, Saint-Louis Hospital and Paris University, Paris, France.
| | - Philippe R Bauer
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, MN, USA
| | - Eric Mariotte
- Centre National Maladie rare des Microangiopathies Thrombotiques, Médecine Intensive et Réanimation, APHP, Saint-Louis Hospital and Paris University, Paris, France
| | - Lene Russell
- Department of Intensive Care, Copenhagen University Hospital, RigshospitaletCopenhagen Academy for Medical Simulation and Education, University of Copenhagen, and the Capital Region of Denmark, Copenhagen, Denmark
| | - Paul Knoebl
- Division of Hematology and Hemostasis Department of Medicine 1, Medical University of Vienna, Vienna, Austria
| | - Ignacio Martin-Loeches
- Department of Intensive Care Medicine, Multidisciplinary Intensive Care Research Organization (MICRO), St. James's Hospital, St James Street, Dublin 8, Ireland
| | - Frédéric Pène
- Centre National Maladie Rare des Microangiopathies Thrombotiques, Médecine Intensive et Réanimation, Cochin Hospital and Paris University, Paris, France
| | - Kathryn Puxty
- Department of Intensive Care, Glasgow Royal Infirmary, Glasgow, UK
| | - Pedro Povoa
- Polyvalent Intensive Care Unit, Hospital de São Francisco Xavier, Lisbon, Portugal.,NOVA Medical School, New University of Lisbon, Lisbon, Portugal.,Center for Clinical Epidemiology and Research, Unit of Clinical Epidemiology, Odense University Hospital Odense, Odense, Denmark
| | - Andreas Barratt-Due
- Department of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway
| | - Jose Garnacho-Montero
- Intensive Care Clinical Unit, Hospital Universitario Virgen Macarena, Seville, Spain
| | | | - Laveena Munshi
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | | | - Michael von Bergwelt-Baildon
- Intensive Care in Hematologic and Oncologic Patients, Munich, Germany.,Medizinische Klinik und Poliklinik III, Klinikum der Universität München, Munich, Germany
| | - Marco Maggiorini
- Medical Intensive Care Unit, University Hospital of Zurich, Zurich, Switzerland
| | - Paul Coppo
- Centre National Maladie Rare des Microangiopathies Thrombotiques, Service d'Hématologie, Saint-Antoine Hospital and Paris University, Paris, France
| | - Spero Cataland
- Department of Medicine, Ohio State University, Columbus, OH, USA
| | - Agnès Veyradier
- Centre National Maladies Rares des Microangiopathies Thrombotiques, Service d'Hématologie, Lariboisière Hospital and Paris University, Paris, France
| | - Andry Van de Louw
- Division of Pulmonary and Critical Care, Penn State University College of Medicine, Hershey, PA, USA
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16
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Joseph A, Rafat C, Zafrani L, Mariani-Kurkdjian P, Veyradier A, Hertig A, Rondeau E, Mariotte E, Azoulay E. Early Differentiation of Shiga Toxin-Associated Hemolytic Uremic Syndrome in Critically Ill Adults With Thrombotic Microangiopathy Syndromes. Crit Care Med 2019; 46:e904-e911. [PMID: 29979220 DOI: 10.1097/ccm.0000000000003292] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVES Thrombotic microangiopathy syndromes are a heterogeneous group of severe diseases that often require ICU admission. Prompt initiation of targeted therapies is required for atypical hemolytic uremic syndrome and thrombotic thrombocytopenic purpura, whereas there is no specific consensus therapy for Shiga toxin-associated hemolytic uremic syndrome. We sought to compare the characteristics of Shiga toxin-associated hemolytic uremic syndrome, atypical hemolytic uremic syndrome, and thrombotic thrombocytopenic purpura patients at admission in the ICU to allow early differentiation of Shiga toxin-associated hemolytic uremic syndrome from other thrombotic microangiopathy syndromes and help to tailor initial treatment. DESIGN Retrospective cohort study. SETTING Two ICUs part of the French reference center for thrombotic microangiopathy syndromes. PATIENTS Adult patients presenting with features of thrombotic microangiopathy syndromes. Other causes than Shiga toxin-associated hemolytic uremic syndrome, atypical hemolytic uremic syndrome, and thrombotic thrombocytopenic purpura were excluded. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS From September 2003 to January 2017, 236 thrombotic microangiopathy syndrome patients were admitted, including 12 Shiga toxin-associated hemolytic uremic syndrome, 21 atypical hemolytic uremic syndrome, and 91 thrombotic thrombocytopenic purpura. Shiga toxin-associated hemolytic uremic syndrome patients were older than other thrombotic microangiopathy syndromes patients (64 yr [interquartile range, 50-72 yr] vs 42 yr [31-54 yr]; p = 0.007) and presented with more frequent digestive symptoms (92% vs 42%; p < 0.001), especially nonbloody diarrhea and vomiting. Biologically, Shiga toxin-associated hemolytic uremic syndrome patients displayed higher fibrinogen (490 mg/dL [460-540 mg/dL] vs 320 mg/dL [240-410 mg/dL]; p = 0.003) and creatinine levels (2.59 mg/dL [2.12-3.42 mg/dL] vs 1.26 mg/dL [0.61-1.90 mg/dL]; p < 0.001), and less marked anemia (hemoglobin level, 9.7 g/dL [8.7-11.9 g/dL] vs 7.7 g/dL [6.3-9.1 g/dL]; p < 0.001). Forty-two percent (n = 5) required renal replacement therapy, and 83% (n = 10) were treated with plasma exchange before the distinction from other thrombotic microangiopathy syndromes could be made. CONCLUSIONS Adult Shiga toxin-associated hemolytic uremic syndrome patients are older, present more frequently with digestive symptoms and display higher hemoglobin and fibrinogen levels than other thrombotic microangiopathy syndromes. However, overlap across the three thrombotic microangiopathy syndromes remains substantial, putting forward the need to implement early plasma therapy until thrombotic thrombocytopenic purpura and atypical hemolytic uremic syndrome can be ruled out.
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Affiliation(s)
- Adrien Joseph
- Medical Intensive Care Unit, Hôpital Saint-Louis, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Cédric Rafat
- Department of Renal Intensive Care and Transplantation, Hôpital Tenon, Assistance Publique Hôpitaux de Paris, Paris, France.,French Reference Center for Thrombotic MicroAngiopathies, Paris, France
| | - Lara Zafrani
- Medical Intensive Care Unit, Hôpital Saint-Louis, Assistance Publique Hôpitaux de Paris, Paris, France.,French Reference Center for Thrombotic MicroAngiopathies, Paris, France.,Paris Diderot Sorbonne University, Paris, France
| | - Patricia Mariani-Kurkdjian
- National Associated Reference Laboratory for Escherichia coli, Microbiology Department, Hôpital Robert-Debré, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Agnès Veyradier
- French Reference Center for Thrombotic MicroAngiopathies, Paris, France.,Paris Diderot Sorbonne University, Paris, France.,Hematology Department and Research Unit EA3518, Institute of Hematology, Hôpital Lariboisière-Fernand Widal, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Alexandre Hertig
- Department of Renal Intensive Care and Transplantation, Hôpital Tenon, Assistance Publique Hôpitaux de Paris, Paris, France.,French Reference Center for Thrombotic MicroAngiopathies, Paris, France.,Sorbonne Universités, UPMC Université Paris 6, Paris, France
| | - Eric Rondeau
- Department of Renal Intensive Care and Transplantation, Hôpital Tenon, Assistance Publique Hôpitaux de Paris, Paris, France.,French Reference Center for Thrombotic MicroAngiopathies, Paris, France.,Sorbonne Universités, UPMC Université Paris 6, Paris, France
| | - Eric Mariotte
- Medical Intensive Care Unit, Hôpital Saint-Louis, Assistance Publique Hôpitaux de Paris, Paris, France.,French Reference Center for Thrombotic MicroAngiopathies, Paris, France
| | - Elie Azoulay
- Medical Intensive Care Unit, Hôpital Saint-Louis, Assistance Publique Hôpitaux de Paris, Paris, France.,French Reference Center for Thrombotic MicroAngiopathies, Paris, France.,Paris Diderot Sorbonne University, Paris, France.,ECSTRA Team, Biostatistics and Clinical Epidemiology, UMR 1153 (Center of Epidemiology and Biostatistic Sorbonne Paris Cité, CRESS) INSERM, Paris, France
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17
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Viscardi G, Zanaletti N, Ferrara MG, Sica A, Falcone U, Guastafierro S, Bracale U, Ribero D, Fasano M, Napolitano S, Vitale P, De Falco V, Giunta EF, Martinelli E, Ciardiello D, Ciardiello F, Troiani T. Atypical haemolytic-uraemic syndrome in patient with metastatic colorectal cancer treated with fluorouracil and oxaliplatin: a case report and a review of literature. ESMO Open 2019; 4:e000551. [PMID: 31673427 PMCID: PMC6802959 DOI: 10.1136/esmoopen-2019-000551] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/23/2019] [Accepted: 07/25/2019] [Indexed: 01/23/2023] Open
Abstract
Background. Thrombotic microangiopathies (TMA) are relatively rare but severe disorders characterised by non-immune haemolytic anaemia, thrombocytopaenia and organ failure. In patients with metastatic cancer, sporadic forms of TMA can be triggered by chemotherapeutic agents or can occur as complication of malignancy itself or of infections. Case report. Hereby, we report a case of a patient diagnosed with metastatic colorectal cancer who experienced an atypical haemolytic-uraemic syndrome (aHUS) during chemotherapy treatment with FOLFOX6 scheme. The use of eculizumab led to prompt recovery of laboratory parameters that was maintained despite treatment discontinuation due to appearance of pneumonia infectious. Additionally, genetic analyses revealed the presence in heterozygosis of CFH gene polymorphisms associated with aHUS. Conclusion. This case emphasises the importance of considering TMA as a possible diagnosis in patients with cancer presenting with haemolytic non-immune mediate anaemia and thrombocytopaenia associated with worsening of renal function. Prompt diagnosis is crucial for the requirement of its specific treatment that can impact on long-term outcome and prognosis.
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Affiliation(s)
- Giuseppe Viscardi
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Nicoletta Zanaletti
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | | | - Antonello Sica
- Oncohematology Unit, AOU Luigi Vanvitelli, Naples, Italy
| | | | | | - Umberto Bracale
- Department of Endocrinology, Gastroenterology and Endoscopic Surgery, Università degli Studi di Napoli Federico II, Naples, Italy
| | - Dario Ribero
- Hepatobilio-Pancreatic and Colorectal Surgery Unit, Candiolo Cancer Institute-FPO IRCCS, Candiolo, Italy
| | - Morena Fasano
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Stefania Napolitano
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Pasquale Vitale
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Vincenzo De Falco
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Emilio Francesco Giunta
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Erika Martinelli
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Davide Ciardiello
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Fortunato Ciardiello
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
| | - Teresa Troiani
- Medical Oncology, Department of Precision Medicine, Università degli Studi della Campania Luigi Vanvitelli, Naples, Italy
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18
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Cohn CS, Allen ES, Cushing MM, Dunbar NM, Friedman DF, Goel R, Harm SK, Heddle N, Hopkins CK, Klapper E, Perumbeti A, Ramsey G, Raval JS, Schwartz J, Shaz BH, Spinella PC, Pagano MB. Critical developments of 2018: A review of the literature from selected topics in transfusion. A committee report from the AABB's Clinical Transfusion Medicine Committee. Transfusion 2019; 59:2733-2748. [PMID: 31148175 DOI: 10.1111/trf.15348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/01/2019] [Accepted: 05/03/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND The AABB compiles an annual synopsis of the published literature covering important developments in the field of transfusion medicine. An abridged version of this work is being made available in TRANSFUSION, with the full-length report available as Appendix S1 (available as supporting information in the online version of this paper). STUDY DESIGN AND METHODS Papers published in late 2017 and 2018 are included, as well as earlier papers cited for background. Although this synopsis is comprehensive, it is not exhaustive, and some papers may have been excluded or missed. RESULTS The following topics are covered: "big data" and "omics" studies, emerging infections and testing, platelet transfusion and pathogen reduction, transfusion therapy and coagulation, transfusion approach to hemorrhagic shock and mass casualties, therapeutic apheresis, and chimeric antigen receptor T-cell therapy. CONCLUSION This synopsis may be a useful educational tool.
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Affiliation(s)
- Claudia S Cohn
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota
| | - Elizabeth S Allen
- Department of Pathology, University of California, San Diego, California
| | - Melissa M Cushing
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, New York
| | - Nancy M Dunbar
- Department of Pathology and Laboratory Medicine, Dartmouth Hitchcock Medical Center, Lebanon, New Hampshire
| | - David F Friedman
- Blood Bank and Transfusion Medicine Department, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Ruchika Goel
- Division of Transfusion Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland.,Division of Hematology/Oncology, Mississippi Valley Regional Blood Center, Springfield, Illinois
| | - Sarak K Harm
- University of Vermont Medical Center, Burlington, VT
| | - Nancy Heddle
- McMaster Center for Transfusion Research, McMaster University, Hamilton, Ontario, Canada
| | | | - Ellen Klapper
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - Ajay Perumbeti
- Department of Pathology and Laboratory Medicine, Children's Hospital Los Angeles, Los Angeles, California
| | - Glenn Ramsey
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Jay S Raval
- Department of Pathology, University of New Mexico, Albuquerque, New Mexico
| | - Joseph Schwartz
- Department of Pathology and Cell Biology, Columbia University, and, New York, New York
| | | | - Philip C Spinella
- Department of Pediatrics, Division of Pediatric Critical Care, Washington University in St Louis School of Medicine, Saint Louis, Missouri
| | - Monica B Pagano
- Transfusion Medicine Division, Department of Laboratory Medicine, University of Washington, Seattle, Washington
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19
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Coppo P, Cuker A, George JN. Thrombotic thrombocytopenic purpura: Toward targeted therapy and precision medicine. Res Pract Thromb Haemost 2019; 3:26-37. [PMID: 30656273 PMCID: PMC6332733 DOI: 10.1002/rth2.12160] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 09/18/2018] [Indexed: 12/21/2022] Open
Abstract
Thrombotic thrombocytopenic purpura (TTP) is a thrombotic microangiopathy characterized by severe congenital or immune-mediated deficiency in ADAMTS13, the enzyme that cleaves von Willebrand factor multimers. This rare condition leads invariably and rapidly to a fatal outcome in the absence of treatment, and therefore raises multiple diagnostic and therapeutic challenges. The novel concepts and mechanisms identified in the laboratory for this disease have been rapidly and successfully translated into the clinic for the benefit of patients, making TTP an archetypal disease that has benefited from targeted therapies. After decades of empirical treatment with plasma exchange, identification of ADAMTS13 as the key enzyme involved in TTP pathophysiology provided an explanation for the remarkable efficacy of plasma administration, in which the missing enzyme is replenished, and paved the way for development of a recombinant form of the enzyme. Similarly, the demonstration of a major role of anti-ADAMTS13 antibodies through models of passive transfer of autoimmunity spurred development of immunomodulatory strategies based on B-cell depletion. More recently, an inhibitor of the platelet-von Willebrand factor interaction demonstrated efficacy in large clinical trials through prevention of formation of further microthrombi and protection of organs from ischemia. These translational breakthroughs in TTP are described in our review.
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Affiliation(s)
- Paul Coppo
- Centre de Référence des Microangiopathies ThrombotiquesParisFrance
- Service d'HématologieHôpital Saint‐AntoineAP‐HPParisFrance
- Sorbonne UniversitésParisFrance
| | - Adam Cuker
- Departments of Medicine and Pathology & Laboratory MedicinePerelman School of Medicine, University of PennsylvaniaPhiladelphiaPennsylvania
| | - James N. George
- Departments of Epidemiology & Biostatistics, MedicineUniversity of Oklahoma Health Sciences CenterOklahoma CityOklahoma
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20
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Tsai HM. Thrombotic Thrombocytopenic Purpura and Hemolytic-Uremic Syndromes. Platelets 2019. [DOI: 10.1016/b978-0-12-813456-6.00042-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Chiasakul T, Cuker A. Clinical and laboratory diagnosis of TTP: an integrated approach. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2018; 2018:530-538. [PMID: 30504354 PMCID: PMC6246034 DOI: 10.1182/asheducation-2018.1.530] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Thrombotic thrombocytopenia purpura (TTP) is a rare, life-threatening disease with an incidence of approximately 2 persons per million per year. It is characterized by severe deficiency of the von Willebrand cleaving protease, ADAMTS13 (a disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13), leading to formation of platelet-rich thrombi in the microvasculature. Prompt initiation of appropriate therapy, particularly plasma exchange, may be life-saving. Diagnosis of TTP is challenging because of its diverse clinical manifestations, overlap in clinical presentation with other thrombotic microangiopathies, and limited availability of ADAMTS13 testing. Clinical prediction scores have been developed to estimate the pretest probability of severe ADAMTS13 deficiency and may be used as an adjunct to clinical judgment to guide initial management decisions. An ADAMTS13 activity level of less than 10% supports the diagnosis of TTP in appropriate clinical contexts, but many centers do not offer testing in-house and must send out the test to a reference laboratory with a turnaround time of several days. In such instances, initial management decisions must be made without the benefit of laboratory testing. In patients with TTP, inhibitor tests may be useful for distinguishing immune-mediated from congenital TTP. In this article, we review the epidemiology, natural history, and clinical presentation of TTP and laboratory assays for TTP including ADAMTS13 activity and inhibitor assays. We also describe an evidence-based approach to the evaluation of a patient with suspected TTP that integrates clinical and laboratory assessment.
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Affiliation(s)
- Thita Chiasakul
- Division of Hematology, Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand; and
| | - Adam Cuker
- Department of Medicine and Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
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22
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Chen W, Ha JP, Hong H, Maitta RW. Absolute immature platelet counts in the setting of suspected heparin-induced thrombocytopenia may predict anti-PF4-heparin immunoassay testing results. Transfus Apher Sci 2018; 57:507-511. [DOI: 10.1016/j.transci.2018.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 03/30/2018] [Accepted: 04/01/2018] [Indexed: 12/15/2022]
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23
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George JN. The importance of clinical judgment for the diagnosis of thrombotic thrombocytopenic purpura. Transfusion 2018; 57:2558-2561. [PMID: 29105831 DOI: 10.1111/trf.14357] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 08/17/2017] [Indexed: 01/21/2023]
Affiliation(s)
- James N George
- Department of Medicine, College of Medicine, Department of Biostatistics and Epidemiology, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK
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24
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Tran PN, Tran MH. Cobalamin deficiency presenting with thrombotic microangiopathy (TMA) features: A systematic review. Transfus Apher Sci 2018; 57:102-106. [PMID: 29454538 DOI: 10.1016/j.transci.2018.01.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Cobalamin deficiency may result in hematologic characteristics similar to thrombotic microangiopathy (TMA). To facilitate diagnosis, we reviewed reported cases of acquired cobalamin deficiency presenting with TMA features (c.def-TMA). METHODS A literature search identified reports of c.def-TMA. Deficiency was defined as B12 levels of <118 pmol/L. Corrected reticulocyte counts and reticulocyte production indexes were calculated. Clinical features were presented as proportion abnormal and results summarized as medians and interquartile ranges (IQR). RESULTS Patient level data was extracted from 41 identified cases. Median age (years) was 43 (30-55) with 21/41 (51%) being female. Cobalamin deficiency was noted in 35/40 (87.5%) but fold increases in MMA and HC were 30 and 6, respectively. The etiology was pernicious anemia in 28/41 (68%) cases. Anemia was both universal and severe, with hemoglobin levels of 55 g/L (4.7-6.6). Hypersegmented neutrophils were noted in 23/37 (62%), schistocytes in 29/38 (76%) and median LDH levels 3981 U/L (2004-5467). The RPI was <3.0% in all patients. Thrombocytopenia occurred in 33/41 (80.5%) with a median platelet count of 91 × 109/L (42-112). Plasma infusion or exchange was initiated in 14/41 (34%) with associated complications in 2 cases. CONCLUSION Reticulocytopenia (RPI of <3.0%) was a universal finding that aids in differentiating c.def-TMA from other causes of hemolysis. C.def-TMA was associated with severe anemia, generally mild-moderate thrombocytopenia, and significant elevations in LDH.
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Affiliation(s)
- Phu Ngoc Tran
- Department of Internal Medicine, University of California Irvine School of Medicine, Orange, CA 92868, USA; Division of Hematology-Oncology, Chao Comprehensive Cancer Center, University of California Irvine School of Medicine, Orange, CA 92868, USA
| | - Minh-Ha Tran
- Department of Internal Medicine, University of California Irvine School of Medicine, Orange, CA 92868, USA; Department of Pathology and Laboratory Medicine, University of California Irvine School of Medicine, Orange, CA 92868, USA.
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25
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Nieto JM, De La Fuente-Gonzalo F, González FA, Villegas A, Martínez R, Fuentes ME, Ropero P. Development and validation of a multivariable prediction rule for detecting a severe acquired ADAMTS13 activity deficiency in patients with thrombotic microangiopathies. ACTA ACUST UNITED AC 2017; 56:294-302. [DOI: 10.1515/cclm-2017-0437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 07/05/2017] [Indexed: 12/31/2022]
Abstract
Abstract
Background:
Thrombotic microangiopathies (TMAs) are a group of diseases that have different aetiologies and treatments, but a clinical differential diagnosis remains difficult. Among TMAs, thrombotic thrombocytopenic purpura (TTP) is characterised by a severe ADAMTS13 functional deficiency. However, assays exploring ADAMTS13 activity are limited to some specialised laboratories. Our objective was to develop and validate a diagnostic method for TTP in adult patients with TMA.
Methods:
We generated a multivariable model (four predictors) on a cohort of 174 TMA patients in order to predict an ADAMTS13 activity deficiency (AUC of 0.927). The multivariable model was simplified into a binary rule to facilitate the interpretation of the predictions. There were two scenarios for a patient: (1) Predicted ADAMTS13 deficiency; if the patient met four conditions simultaneously (platelets ≤44×109/L, creatinine ≤2 mg/dL (≤176.84 µmol/L) for males or ≤1.9 mg/dL (≤168 µmol/L) for females, age ≤68 years and no history of haematopoietic stem cell transplant [HSCT]); or (2) Predicted “normal” activity; if any of the above conditions are not met. This rule was validated on a second cohort of 86 patients and performed with sensitivity of 87.7% and specificity of 92.7%.
Results and conclusions:
This could lead to the earlier confirmation or rapid exclusion of TTP when ADAMTS13 testing is not avalilable, facilitating a more suitable therapy based on the aetiology of the TMA.
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Affiliation(s)
- Jorge M. Nieto
- Departamento de Eritropatología , Servicio de Hematología y Hemoterapia, Hospital Clínico San Carlos , calle Profesor Martín Lagos sn , 28040 Madrid , Spain
| | | | - Fernando A. González
- Servicio de Hematología y Hemoterapia, Hospital Clínico San Carlos , Madrid , Spain
| | - Ana Villegas
- Servicio de Hematología y Hemoterapia, Hospital Clínico San Carlos , Madrid , Spain
| | - Rafael Martínez
- Servicio de Hematología y Hemoterapia, Hospital Clínico San Carlos , Madrid , Spain
| | - Manuel E. Fuentes
- Unidad de Investigación, Hospital Clínico San Carlos , Madrid , Spain
| | - Paloma Ropero
- Servicio de Hematología y Hemoterapia, Hospital Clínico San Carlos , Madrid , Spain
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26
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Jamme M, Rondeau E. The PLASMIC score for thrombotic thrombocytopenic purpura. LANCET HAEMATOLOGY 2017; 4:e148-e149. [DOI: 10.1016/s2352-3026(17)30024-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 02/13/2017] [Indexed: 01/18/2023]
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27
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Bendapudi PK, Hurwitz S, Fry A, Marques MB, Waldo SW, Li A, Sun L, Upadhyay V, Hamdan A, Brunner AM, Gansner JM, Viswanathan S, Kaufman RM, Uhl L, Stowell CP, Dzik WH, Makar RS. Derivation and external validation of the PLASMIC score for rapid assessment of adults with thrombotic microangiopathies: a cohort study. LANCET HAEMATOLOGY 2017; 4:e157-e164. [PMID: 28259520 DOI: 10.1016/s2352-3026(17)30026-1] [Citation(s) in RCA: 285] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 01/18/2017] [Accepted: 01/19/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND Among the syndromes characterised by thrombotic microangiopathy, thrombotic thrombocytopenic purpura is distinguished by a severe deficiency in the ADAMTS13 enzyme. Patients with this disorder need urgent treatment with plasma exchange. Because ADAMTS13 activity testing typically requires prolonged turnaround times and might be unavailable in resource-poor settings, a method to rapidly assess the likelihood of severe ADAMTS13 deficiency is needed. METHODS All consecutive adult patients presenting to three large academic medical centres in Boston, MA, USA, with thrombotic microangiopathy and a possible diagnosis of thrombotic thrombocytopenic purpura between Jan 8, 2004, and Dec 6, 2015, were included in an ongoing multi-institutional registry (the Harvard TMA Research Collaborative). Univariate analysis was used to identify covariates for a logistic regression model predictive of severe ADAMTS13 deficiency (≤10% activity). A clinical point score was generated, and its diagnostic performance was assessed using internal and external validation cohorts and compared to clinical assessment alone. FINDINGS 214 patients with thrombotic microangiopathy were included in the derivation cohort. A seven-component clinical prediction tool, termed the PLASMIC score, was developed and found to reliably assess the pretest probability of severe ADAMTS13 deficiency (C statistic 0·96, 95% CI 0·92-0·98). Our diagnostic model was reproducibly accurate in both the internal (0·95, 0·91-0·98) and external (0·91, 0·85-0·95) validation cohorts. The scoring system also more consistently diagnosed thrombotic microangiopathy due to severe ADAMTS13 deficiency than did standard clinical assessment, as measured by C statistic (0·96, 95% CI 0·92-0·98 for PLASMIC vs 0·83, 0·77-0·88 for clinical assessment; p<0·0001) and mean Brier score (0·065 for PLASMIC vs 0·111 for clinical assessment; mean paired difference 0·05, 95% CI 0·01-0·08; p<0·0001). When utilised in addition to clinical assessment, the PLASMIC score contributed significant discriminatory power (integrated discrimination improvement 0·24, 95% CI 0·11-0·37). INTERPRETATION We have developed and validated a clinical prediction tool-the PLASMIC score-to stratify patients with thrombotic microangiopathy according to their risk of having severe ADAMTS13 deficiency. We have shown that this scoring system is superior to standard clinical assessment in addressing the diagnostic challenge presented by thrombotic microangiopathy. Its use, together with clinical judgment, may facilitate treatment decisions in patients for whom timely results of ADAMTS13 activity testing are unavailable. FUNDING The Luick Family Fund of Massachusetts General Hospital.
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Affiliation(s)
- Pavan K Bendapudi
- Division of Hematology, Massachusetts General Hospital, Boston, MA, USA; Blood Transfusion Service, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA.
| | - Shelley Hurwitz
- Center for Clinical Investigation, Brigham and Women's Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Ashley Fry
- Division of Hematology and Oncology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Marisa B Marques
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Stephen W Waldo
- Department of Medicine, Veterans Affairs Eastern Colorado Health Care System, Denver, CO, USA
| | - Ang Li
- Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Lova Sun
- Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Vivek Upadhyay
- Department of Medicine, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Ayad Hamdan
- Division of Hematology and Oncology, Beth Israel Deaconess Medical Center, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Andrew M Brunner
- Division of Hematology, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - John M Gansner
- Division of Hematology, Brigham and Women's Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Srinivas Viswanathan
- Division of Hematology, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Richard M Kaufman
- Department of Pathology, Brigham and Women's Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Lynne Uhl
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Christopher P Stowell
- Blood Transfusion Service, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Walter H Dzik
- Division of Hematology, Massachusetts General Hospital, Boston, MA, USA; Blood Transfusion Service, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Robert S Makar
- Blood Transfusion Service, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
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28
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Cheng C, Tormey CA, Hendrickson JE. Limitations of a scoring model to predict thrombotic thrombocytopaenic purpura. Vox Sang 2017; 112:185-186. [PMID: 28098338 DOI: 10.1111/vox.12480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 11/29/2016] [Indexed: 11/28/2022]
Affiliation(s)
- C Cheng
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - C A Tormey
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT, USA.,Pathology & Laboratory Medicine Service, VA Connecticut Healthcare System, West Haven, CT, USA
| | - J E Hendrickson
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT, USA.,Department of Pediatrics, Yale University School of Medicine, New Haven, CT, USA
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Berger BE. The Alternative Pathway of Complement and the Evolving Clinical-Pathophysiological Spectrum of Atypical Hemolytic Uremic Syndrome. Am J Med Sci 2016; 352:177-90. [PMID: 27524217 DOI: 10.1016/j.amjms.2016.05.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 03/31/2016] [Accepted: 05/03/2016] [Indexed: 01/31/2023]
Abstract
Complement-mediated atypical hemolytic uremic syndrome (aHUS) comprises approximately 90% of cases of aHUS, and results from dysregulation of endothelial-anchored complement activation with resultant endothelial damage. The discovery of biomarker ADAMTS13 has enabled a more accurate diagnosis of thrombotic thrombocytopenic purpura (TTP) and an appreciation of overlapping clinical features of TTP and aHUS. Given our present understanding of the pathogenic pathways involved in aHUS, it is unlikely that a specific test will be developed. Rather the use of biomarker data, complement functional analyses, genomic analyses and clinical presentation will be required to diagnose aHUS. This approach would serve to clarify whether a thrombotic microangiopathy present in a complement-amplifying condition arises from the unmasking of a genetically driven aHUS versus a time-limited complement storm-mediated aHUS due to direct endothelial damage in which no genetic predisposition is present. Although both scenarios result in the phenotypic expression of aHUS and involve the alternate pathway of complement activation, long-term management would differ.
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Affiliation(s)
- Bruce E Berger
- School of Medicine, Case Western Reserve University, Cleveland, Ohio.
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30
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Bendapudi PK, Makar RS. An Algorithmic Approach to the Diagnosis and Management of the Thrombotic Microangiopathies. Am J Clin Pathol 2016; 145:152-4. [PMID: 26864515 DOI: 10.1093/ajcp/aqw003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Affiliation(s)
| | - Robert S Makar
- From Blood Transfusion Service, Department of Pathology, Massachusetts General Hospital, Boston;
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31
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A 35-year-old woman with influenza A-associated thrombotic thrombocytopenic purpura. Blood Coagul Fibrinolysis 2016; 26:469-72. [PMID: 25688460 DOI: 10.1097/mbc.0000000000000255] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A previously healthy 35-year-old woman presented with severe thrombotic thrombocytopenic purpura (TTP) affecting several organs and concomitant influenza A infection. On admission to hospital, haemoglobin was 5.4 g/dl, platelet count 6 × 10/l, Schistocyte count in peripheral blood 5%, and throat swab positive for influenza A RNA. The patient was treated with antiviral medication and transfusions of fresh frozen plasma before plasma exchange therapy with excellent response. Plasmaphereses were attenuated after 5 days, resulting in TTP relapse 3 days later. A disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13 (ADAMTS13) protein was very low (<0.04 U/l) and anti-ADAMTS13 elevated (>2 U/l), consistent with acquired TTP. Platelet counts normalized after five additional plasma exchanges and oral corticosteroids. Antinuclear antibodies and subgroup anti-Ro/Sjögren's syndrome A antigen (SSA) were detected in serum and have remained borderline-elevated, although evaluation during TTP, recovery and follow-up have lacked clinical manifestations of connective tissue disease. Influenza A infection induced production of ADAMTS13 inhibitor, which resulted in TTP in a patient with circulating antinuclear antibodies, lacking other manifestations of connective tissue disease.
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32
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Mannucci P, Cugno M. The complex differential diagnosis between thrombotic thrombocytopenic purpura and the atypical hemolytic uremic syndrome: Laboratory weapons and their impact on treatment choice and monitoring. Thromb Res 2015; 136:851-4. [DOI: 10.1016/j.thromres.2015.09.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/02/2015] [Accepted: 09/06/2015] [Indexed: 10/23/2022]
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Bentley MJ, Rodgers GM. Acute renal failure is prevalent in patients with thrombotic thrombocytopenic purpura associated with low plasma ADAMTS13 activity: comment. J Thromb Haemost 2015; 13:1524-5. [PMID: 25918973 DOI: 10.1111/jth.12992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 04/24/2015] [Indexed: 11/29/2022]
Affiliation(s)
- M J Bentley
- Ogden Regional Medical Center, Ogden Internal Medicine, Ogden, UT, USA
| | - G M Rodgers
- University of Utah Health Sciences Center, Salt Lake City, UT, USA
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34
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Sauvètre G, Grange S, Froissart A, Veyradier A, Coppo P, Benhamou Y. La révolution des anticorps monoclonaux dans la prise en charge des microangiopathies thrombotiques. Rev Med Interne 2015; 36:328-38. [DOI: 10.1016/j.revmed.2014.10.364] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 08/22/2014] [Accepted: 10/24/2014] [Indexed: 12/15/2022]
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35
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Lehman CM, Rodgers GM. Utility of ADAMTS13 assays in diagnosing thrombotic thrombocytopenic purpura. Arch Pathol Lab Med 2015; 139:433. [PMID: 25822759 DOI: 10.5858/arpa.2014-0225-le] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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36
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Hong H, Xiao W, Stempak LM, Sandhaus LM, Maitta RW. Absolute immature platelet count dynamics in diagnosing and monitoring the clinical course of thrombotic thrombocytopenic purpura. Transfusion 2014; 55:756-65. [PMID: 25370931 DOI: 10.1111/trf.12912] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 08/21/2014] [Accepted: 09/08/2014] [Indexed: 12/21/2022]
Abstract
BACKGROUND Thrombotic thrombocytopenic purpura (TTP) is a life-threatening diagnosis requiring prompt initiation of therapeutic plasma exchange (TPE). Measurement of immature platelet (PLT) fraction (%-IPF) differentiates PLT consumption or destruction from hypoproduction. STUDY DESIGN AND METHOD Our study evaluated %-IPF changes over the course of TTP treated with TPE and as a measure of treatment efficacy. Eleven idiopathic TTP patients, two human immunodeficiency virus (HIV)-associated TTP patients, and five non-TTP patients with thrombocytopenia were enrolled into our study. All patients were treated with TPE and had ADAMTS13 activity measured. RESULTS All idiopathic TTP patients had a significantly increased %-IPF and decreased absolute immature PLT count (A-IPC) and PLT count at presentation. An A-IPC value of less than 5 × 10(9) /L at presentation has 84.6% sensitivity, 80% specificity, and 91.7% positive predictive value for diagnosing TTP. A concurrent steady decline in %-IPF and increased PLT counts toward normal was observed in TTP patients undergoing TPE. The A-IPC, however, showed an increase and decrease curve that was not seen in the two HIV-associated TTP patients with no response to TPE and the five non-TTP patients. More importantly, reaching an A-IPC ratio of 3 compared to baseline value during TPE can readily differentiate idiopathic TTP from the other two groups and is correlated with good clinical responses to TPE. An abrupt increase of A-IPC during TPE was also noted in a TTP patient who relapsed 3 days before PLT count decrease. A-IPC is positively correlated with ADAMTS13 activity at presentation but negatively correlated with ADAMTS13 activity during recovery. CONCLUSION A-IPC should be routinely analyzed for diagnosing and monitoring TTP patients.
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Affiliation(s)
- Hong Hong
- Department of Pathology, University Hospitals Case Medical Center, Cleveland, Ohio.,Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Wenbin Xiao
- Department of Pathology, University Hospitals Case Medical Center, Cleveland, Ohio.,Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Lisa M Stempak
- Department of Pathology, University Hospitals Case Medical Center, Cleveland, Ohio.,Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Linda M Sandhaus
- Department of Pathology, University Hospitals Case Medical Center, Cleveland, Ohio.,Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - Robert W Maitta
- Department of Pathology, University Hospitals Case Medical Center, Cleveland, Ohio.,Case Western Reserve University School of Medicine, Cleveland, Ohio
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Acquired TTP: ADAMTS13 meets the immune system. Blood Rev 2014; 28:227-34. [DOI: 10.1016/j.blre.2014.07.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 07/14/2014] [Indexed: 02/06/2023]
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How I treat: the clinical differentiation and initial treatment of adult patients with atypical hemolytic uremic syndrome. Blood 2014; 123:2478-84. [PMID: 24599547 DOI: 10.1182/blood-2013-11-516237] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Published data demonstrating the efficacy of complement inhibition therapy in patients with atypical hemolytic uremic syndrome (aHUS) are remarkable in contrast to the historically poor long-term prognosis for aHUS patients treated with plasma-based therapy. Although both aHUS and acquired thrombotic thrombocytopenic purpura (TTP) remain clinical diagnoses, an increased understanding of both conditions has improved our ability to differentiate aHUS from acquired TTP. These same data have also demonstrated the importance of a more rapid identification and diagnosis of aHUS as the recovery of end-organ injury present appears to be related to the time to initiate therapy with eculizumab. The diagnosis of acquired TTP can be confirmed by the finding of severely deficient ADAMTS13 activity (<10%) with evidence of an ADAMTS13 antibody inhibitor whereas merely deficient ADAMTS13 activity in the absence of an ADAMTS13 autoantibody is more consistent with congenital TTP. In the absence of an objective diagnostic test, clinicians must rely collectively on platelet count, serum creatinine, and ADAMTS13 activity in the context of the response to plasma exchange therapy to identify patients whose diagnosis is most consistent with aHUS, and thus be more likely to benefit from therapy with eculizumab.
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Bentley MJ, Wilson AR, Rodgers GM. Performance of a clinical prediction score for thrombotic thrombocytopenic purpura in an independent cohort. Vox Sang 2013; 105:313-8. [DOI: 10.1111/vox.12050] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 03/24/2013] [Accepted: 03/30/2013] [Indexed: 11/30/2022]
Affiliation(s)
| | - A. R. Wilson
- Statistics; ARUP Laboratories; Salt Lake City; UT; USA
| | - G. M. Rodgers
- Internal Medicine and Pathology; University of Utah Health Sciences Center; Salt Lake City; UT; USA
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Korkmaz S, Keklik M, Sivgin S, Yildirim R, Tombak A, Kaya ME, Acik DY, Esen R, Hacioglu SK, Sencan M, Kiki I, Tiftik EN, Kuku I, Okan V, Yilmaz M, Demir C, Sari I, Altuntas F, Unal A, Ilhan O. Therapeutic plasma exchange in patients with thrombotic thrombocytopenic purpura: a retrospective multicenter study. Transfus Apher Sci 2013; 48:353-8. [PMID: 23602056 DOI: 10.1016/j.transci.2013.04.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
UNLABELLED Thrombotic thrombocytopenic purpura (TTP) is a particular form of thrombotic microangiopathy typically characterized by thrombocytopenia, microangiopathic hemolytic anemia, fever, neurological abnormalities, and renal dysfunction. TTP requires a rapid diagnosis and an adapted management in emergency. Daily sessions of therapeutic plasma exchange (TPE) remain the basis of management of TTP. Also, TTP is a rare disease that is fatal if it is not treated. TPE has resulted in excellent remission and survival rates in TTP patients. AIM We aimed to present our experience in 163 patients with TTP treated with TPE during the past 5years from 10 centers of Turkey. PATIENTS AND METHODS One hundered and sixty-three patients with TTP treated with TPE during the past 5years from 10 centers of Turkey were retrospectively evaluated. TPE was carried out 1-1.5times plasma volume. Fresh frozen plasma (FFP) was used as the replacement fluid. TPE was performed daily until normalization of serum lactate dehydrogenase (LDH) and recovery of the platelet count to >150×10(9)/dL. TPE was then slowly tapered. Clinical data, the number of TPE, other given therapy modalities, treatment outcomes, and TPE complications were recorded. RESULTS Fifty-eight percent (95/163) of the patients were females. The median age of the patients was 42years (range; 16-82). The median age of male patients was significantly higher than female (53 vs. 34years; p<0.001). All patients had thrombocytopenia and microangiopathic hemolytic anemia. At the same time, 82.8% (135/163) of patients had neurological abnormalities, 78.5% (128/163) of patients had renal dysfunction, and 89% (145/163) of patients had fever. Also, 10.4% (17/163) of patients had three of the five criteria, 10.4% (17/163) of patients had four of the five criteria, and 6.1% (10/163) of patients had all of the five criteria. Primary TTP comprised of 85.9% (140/163) of the patients and secondary TTP comprised of 14.1% (23/163) of the patients. Malignancy was the most common cause in secondary TTP. The median number of TPE was 13 (range; 1-80). The number of TPE was significantly higher in complete response (CR) patients (median 15.0 vs. 3.5; p<0.001). CR was achieved in 85.3% (139/163) of the patients. Similar results were achieved with TPE in both primary and secondary TTP (85% vs. 87%, respectively; p=0.806). There was no advantage of TPE+prednisolone compared to TPE alone in terms of CR rates (82.1% vs. 76.7%; p=0.746). CR was not achieved in 14.7% (24/163) of the patients and these patients died of TTP related causes. There were no statistical differences in terms of mortality rate between patients with secondary and primary TTP [15% (21/140) vs. 13% (3/23); p=0.806]. But, we obtained significant statistical differences in terms of mortality rate between patients on TPE alone and TPE+prednisolone [14% (12/86) vs. 3% (2/67), p<0.001]. CONCLUSIONS TPE is an effective treatment for TTP and is associated with high CR rate in both primary and secondary TTP. Thrombocytopenia together with microangiopathic hemolytic anemia is mandatory for the diagnosis of TTP and if these two criteria met in a patient, TPE should be performed immediately.
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Affiliation(s)
- Serdal Korkmaz
- Cumhuriyet University, Department of Hematology, Sivas, Turkey.
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41
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Shah N, Sarode R. Thrombotic thrombocytopenic purpura-what is new? J Clin Apher 2013; 28:30-5. [DOI: 10.1002/jca.21264] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Accepted: 01/15/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Neil Shah
- Division of Transfusion Medicine and Hemostasis; Department of Pathology; UT Southwestern Medical Center; Dallas; Texas
| | - Ravi Sarode
- Division of Transfusion Medicine and Hemostasis; Department of Pathology; UT Southwestern Medical Center; Dallas; Texas
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Prestidge TD, Rurali E, Wadsworth L, Wu JK, Moore JC, Bresin E. Congenital thrombotic thrombocytopenic purpura (cTTP) with two novel mutations. Pediatr Blood Cancer 2012; 59:1296-8. [PMID: 22488907 DOI: 10.1002/pbc.24159] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2011] [Accepted: 03/12/2012] [Indexed: 11/07/2022]
Abstract
Congenital thrombotic thrombocytopenic purpura (cTTP) is a rare disorder of childhood that has clinical and laboratory similarities to other, more common conditions. Prompt recognition is required as delays in therapy are associated with significant morbidity and failure to treat may lead to death. While the principles of treatment have not changed, enormous progress in the genetic and molecular understanding has taken place. Emerging treatment options may offer some hope of improved quality of life in future. We describe a Chinese patient with cTTP which resulted from two previously undescribed mutations in the ADAMTS13 gene.
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Affiliation(s)
- Timothy D Prestidge
- Blood and Cancer Centre, Starship Children's Hospital, Auckland, New Zealand.
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George JN, Chen Q, Deford CC, Al-Nouri Z. Ten patient stories illustrating the extraordinarily diverse clinical features of patients with thrombotic thrombocytopenic purpura and severe ADAMTS13 deficiency. J Clin Apher 2012; 27:302-11. [PMID: 22927184 DOI: 10.1002/jca.21248] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 07/28/2012] [Indexed: 01/01/2023]
Abstract
Patients with thrombotic thrombocytopenic purpura (TTP) and severe ADAMTS13 deficiency are often considered to have typical clinical features. However, our experience is that there is extraordinary diversity of the presenting features and the clinical courses of these patients. This diversity is illustrated by descriptions of 10 patients. The patients illustrate that ADAMTS13 activity may be normal initially but severely deficient in subsequent episodes. Patients with established diagnoses of systemic infection as the cause of their clinical features may have undetectable ADAMTS13 activity. Patients may have a prolonged prodrome of mild symptoms with only microangiopathic hemolytic anemia and thrombocytopenia or they may have the sudden onset of critical illness with multiple organ involvement. Patients may die rapidly or recover rapidly; they may require minimal treatment or extensive and prolonged treatment. Patients may have acute and severe neurologic abnormalities before microangiopathic hemolytic anemia and thrombocytopenia occur. Patients may have concurrent TTP and systemic lupus erythematosus. Patients may have hereditary ADAMTS13 deficiency as the etiology of their TTP rather than acquired autoimmune ADAMTS13 deficiency. These patients' stories illustrate the clinical spectrum of TTP with ADAMTS13 deficiency and emphasize the difficulties of clinical diagnosis.
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Affiliation(s)
- James N George
- Department of Biostatistics and Epidemiology, College of Public Health, Department of Medicine, College of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.
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Current management and therapeutical perspectives in thrombotic thrombocytopenic purpura. Presse Med 2012; 41:e163-76. [DOI: 10.1016/j.lpm.2011.10.024] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 10/26/2011] [Accepted: 10/28/2011] [Indexed: 12/26/2022] Open
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Coppo P. Thrombotic microangiopathies: from empiricism to targeted therapies. Presse Med 2012; 41:e101-4. [PMID: 22317842 DOI: 10.1016/j.lpm.2011.10.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Accepted: 10/10/2011] [Indexed: 10/14/2022] Open
Affiliation(s)
- Paul Coppo
- UPMC université Paris 6, AP-HP, hôpital Saint-Antoine, service d'hématologie et de thérapie cellulaire, Paris, France.
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46
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Firbas C, Siller-Matula JM, Jilma B. Targeting von Willebrand factor and platelet glycoprotein Ib receptor. Expert Rev Cardiovasc Ther 2011; 8:1689-701. [PMID: 21108551 DOI: 10.1586/erc.10.154] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Atherothrombotic events, such as acute coronary syndrome or stroke, are the result of platelet activation. Von Willebrand factor (vWF), a multimeric glycoprotein, plays a key role in aggregation of platelets, especially under high-shear conditions. Acting as bridging element or ligand between damaged endothelial sites and the glycoprotein Ib (GPIb) receptor on platelets, vWF is responsible for platelet adhesion and aggregation. This vWF activation and further platelet aggregation mainly occurs under high shear stress present in small arterioles or during deficiency of the vWF-cleaving protease ADAMTS13. There are several substances targeting vWF itself or its binding receptor GPIb on platelets. Two antibodies are directed against vWF: AJW200, an IgG4 humanized monoclonal antibody, and 82D6A3, a monoclonal antibody of the collagen-binding A-3 domain of vWF. ALX-0081 and ALX-0681 are bivalent humanized nanobodies targeting the GPIb binding site of vWF. Aptamers are oligonucleotides with drug-like properties that share some of the attributes of monoclonal antibodies. ARC1779 is a second-generation, nuclease-resistant aptamer, binding to the activated vWF A1 domain and ARC15105 is a chemically advanced follower with an assumed higher affinity to vWF. Antibodies targeting GPIbα are h6B4-Fab, a murine monoclonal antibody; GPG-290, a recombinant, chimeric protein containing the amino-terminal 290 amino acids of GPIbα linked to human IgG1 Fc; and the monoclonal antibody SZ2. There are a number of promising preclinical results and development of some agents (AJW 200, ARC1779 and ALX-0081) has already reached Phase II trials.
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Affiliation(s)
- Christa Firbas
- Medical University of Vienna, Department of Clinical Pharmacology, Waehringer Guertel 18-20, 1090 Vienna, Austria
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47
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Coppo P. Microangiopathie thrombotique en réanimation — Vers une classification physiopathologique pour des thérapeutiques ciblées. MEDECINE INTENSIVE REANIMATION 2011. [DOI: 10.1007/s13546-010-0110-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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48
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Raife TJ. ADAMTS13 and thrombotic thrombocytopenic purpura: where we are and where we need to go. Transfusion 2010; 50:1640-2. [DOI: 10.1111/j.1537-2995.2010.02778.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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