1
|
Yao W, Ai D, Zhang Q, Li X, Zhou M, Zhang N, Yang S, Chen Z, Zhen Y, Luke KH, Wu R. A long term outcomes analysis of severe haemophilia A boys receiving 4 years prophylaxis on the Chinese Haemophilia Individualized escalating low dose Prophylaxis (CHIPS). Thromb Res 2024; 241:109110. [PMID: 39116483 DOI: 10.1016/j.thromres.2024.109110] [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: 04/24/2024] [Revised: 07/28/2024] [Accepted: 07/30/2024] [Indexed: 08/10/2024]
Abstract
BACKGROUND The Chinese Haemophilia Individualized Prophylaxis Study (CHIPS), which was launched in 2016, reported a significant reduction in haemarthrosis over a one-year study. However, its long-term efficacy requires verification. This paper summarizes the clinical outcomes of 18 severe haemophilia A (SHA) patients who completed one year on the CHIPS and 3 more years of follow-up. METHODS Clinical follow-up was based on the CHIPS protocol (from July 2018 to July 2021). Escalation was based on index joint bleeding, and serial ultrasound (greyscale and colour Doppler) examinations of the index joints (both sides of the ankles, knees and elbows) were conducted every 6 months via a scoring system. RESULTS A total of 18 SHA patients completed the 3-year study. Fifteen patients dropped out due to the financial crisis during the COVID-19 pandemic in China. The median age was 5.4 (range 4.3-6.9) years. A significant reduction in haemarthrosis was achieved, with mean annual bleeding rates reduced from 18.9 ± 2.8 to 1.7 ± 0.4 (p < 0.001), annual joint bleeding rates from 3.1 ± 0.7 to1.2 ± 0.3 (p < 0.028). 5 out of 8 target joint resolved. Sixteen doses were escalated. At study exit, the heterogeneous treatment outcomes of the SHA boys were 5 at step 4 (20-25 lU/kg, every other day), 10 at step 3 (15-20 IU/kg, 3×/week), 2 at step 2 (10-15 lU/kg, 3×/week) and 1 at step 1 (10-15 lU/kg, 2×/week). The mean FVIII consumption was 2964 IU/kg/year, with savings. The quality of life improved, with Canadian Haemophilia Outcomes-Kids Life Assessment Tool (CHO-KLAT, Chinese Version 2.0) scores ranging from 68.8 to 78.8. There was no change in the ultrasound score. CONCLUSION Our follow-up data on the 18 SHA boys after completing one year on the CHIPS verify the long-term efficacy of the CHIPS for haemarthrosis reduction, joint health preservation, improvement in the quality of life of the boys and cost savings.
Collapse
Affiliation(s)
- Wanru Yao
- Hematology Department, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, China
| | - Di Ai
- Hematology Department, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, China
| | - Qing Zhang
- Haemophilia Diagnosis and Treatment Center, Department of Hematology and Oncology, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Xiaojing Li
- Haemophilia Treatment Center, Department of Pediatrics, New Century Women's and Children's Hospital, Chengdu, China
| | - Min Zhou
- Haemophilia Diagnosis and Treatment Center, Department of Hematology and Oncology, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Ningning Zhang
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Sheng Yang
- Department of Ultrasound, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Zhenping Chen
- Hematologic Disease Laboratory, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Yingzi Zhen
- Hematology Department, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, China
| | - Koon-Hung Luke
- Department of Pediatrics, Laboratory Medicine and Pathology, Division of Hematology and Oncology, University of Ottawa, Children Hospital of Eastern Ontario, Ottawa, ON, Canada.
| | - Runhui Wu
- Hematology Department, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, China.
| |
Collapse
|
2
|
Madan B, Ozelo MC, Raheja P, Symington E, Quon DV, Leavitt AD, Pipe SW, Lowe G, Kenet G, Reding MT, Mason J, Wang M, von Drygalski A, Klamroth R, Shapiro S, Chambost H, Dunn AL, Oldenburg J, Chou SC, Peyvandi F, Millar CM, Osmond D, Yu H, Dashiell-Aje E, Robinson TM, Mahlangu J. Three-year outcomes of valoctocogene roxaparvovec gene therapy for hemophilia A. J Thromb Haemost 2024; 22:1880-1893. [PMID: 38614387 DOI: 10.1016/j.jtha.2024.04.001] [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: 11/03/2023] [Revised: 04/02/2024] [Accepted: 04/03/2024] [Indexed: 04/15/2024]
Abstract
BACKGROUND Valoctocogene roxaparvovec transfers a human factor (F)VIII coding sequence into hepatocytes of people with severe hemophilia A to provide bleeding protection. OBJECTIVES To present 3-year efficacy and safety in the multicenter, open-label, single-arm, phase 3 GENEr8-1 trial. METHODS GENEr8-1 enrolled 134 adult males with severe hemophilia A who were receiving FVIII prophylaxis. Efficacy endpoints included annualized bleeding rate, annualized FVIII utilization, FVIII activity (chromogenic substrate assay; imputed as 1 IU/dL at baseline and 0 IU/dL after discontinuation), and the Haemophilia-Specific Quality of Life Questionnaire for Adults. Safety was assessed by adverse events (AEs). RESULTS At week 156, 131 of 134 participants remained in the study; overall, 17 of 134 resumed prophylaxis. Mean annualized bleeding rate for treated bleeds decreased from 4.8 (SD, 6.5) bleeds/y at baseline to 0.8 (SD, 2.3; P < .0001) bleeds/y after prophylaxis (prophylaxis cessation to last follow-up) and 0.97 (SD, 3.48) bleeds/y during year 3. Annualized FVIII utilization decreased 96.8% from baseline after prophylaxis and 94.2% during year 3. At week 156, mean and median FVIII activity were 18.4 (SD, 30.8) and 8.3 IU/dL, respectively. FVIII activity decrease was lower between years 2 and 3 than between years 1 and 2. At the end of year 3, clinically meaningful improvements in the Haemophilia-Specific Quality of Life Questionnaire for Adults Total Score were observed (mean change from baseline, 6.6; 95% CI, 4.24-8.87; P < .0001). Mild alanine aminotransferase elevations remained the most common AE during year 3 (23.7% of participants). A serious AE of B-cell acute lymphoblastic leukemia was considered unrelated to treatment. CONCLUSION Hemostatic efficacy was maintained, and safety remained unchanged from previous years.
Collapse
Affiliation(s)
- Bella Madan
- Centre for Haemostasis and Thrombosis, Guy's and St Thomas' National Health Service Trust, London, United Kingdom.
| | - Margareth C Ozelo
- Hemocentro University of Campinas, Department of Internal Medicine, School of Medical Sciences, University of Campinas, Campinas, São Paulo, Brazil
| | - Priyanka Raheja
- Haemophilia Centre, Royal London Hospital, Barts Health National Health Service Trust, London, United Kingdom
| | - Emily Symington
- Haemophilia Centre, Cambridge University Hospitals National Health Service Foundation Trust, Cambridge, United Kingdom
| | - Doris V Quon
- Orthopaedic Hemophilia Treatment Center, Los Angeles, California, USA
| | - Andrew D Leavitt
- Hemophilia Treatment Center, University of California San Francisco, San Francisco, California, USA
| | - Steven W Pipe
- Departments of Pediatrics and Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Gillian Lowe
- West Midlands Adult Haemophilia Comprehensive Care Centre, University Hospitals Birmingham National Health Service Foundation Trust, Birmingham, United Kingdom
| | - Gili Kenet
- The National Hemophilia Center and Amalia Biron Research Institute of Thrombosis and Hemostasis, Sheba Medical Center, Tel HaShomer, Tel Aviv University, Tel Aviv, Israel
| | - Mark T Reding
- Center for Bleeding and Clotting Disorders, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jane Mason
- Queensland Haemophilia Centre, Cancer Care Services, Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia; School of Medicine, University of Queensland, Brisbane, Queensland, Australia
| | - Michael Wang
- Hemophilia and Thrombosis Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Annette von Drygalski
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - Robert Klamroth
- Vascular Medicine and Haemostaseology, Vivantes Klinikum im Friedrichshain, Berlin, Germany; Institute of Experimental Hematology and Transfusion Medicine, University Hospital Bonn, Medical Faculty, University of Bonn, Bonn, Germany
| | - Susan Shapiro
- Blood Theme Oxford Biomedical Research Centre, Oxford University Hospitals National Health Service Foundation Trust, Oxford, United Kingdom; Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom; Oxford National Institute for Health Research Biomedical Research Centre, Oxford, United Kingdom
| | - Hervé Chambost
- AP-HM, Department of Pediatric Hematology Oncology, Children Hospital La Timone & Aix Marseille University, Institut national de la santé et de la recherche médicale, Institut national de la recherche agronomique, Centre recherche en CardioVasculaire et Nutrition, Marseille, France
| | - Amy L Dunn
- The Division of Hematology, Oncology, and Blood and Marrow Transplantation at Nationwide Children's Hospital and Ohio State University College of Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Johannes Oldenburg
- Institute of Experimental Haematology and Transfusion Medicine and Center for Rare Diseases, University Hospital Bonn, Bonn, Germany
| | - Sheng-Chieh Chou
- Division of Hematology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Flora Peyvandi
- Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico and Fondazione Luigi Villa, Milan, Italy; Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - Carolyn M Millar
- Centre for Haematology, Imperial College London, London, United Kingdom; Imperial College Healthcare National Health Service Trust, London, United Kingdom
| | - Dane Osmond
- BioMarin Pharmaceutical Inc, Novato, California, USA
| | - Hua Yu
- BioMarin Pharmaceutical Inc, Novato, California, USA
| | | | | | - Johnny Mahlangu
- Hemophilia Comprehensive Care Center, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand and National Health Laboratory Service, Johannesburg, South Africa
| |
Collapse
|
3
|
Kraemmer D, Königsbrügge O, Moik F, Wildner B, Ay C, Pabinger I. Pharmacokinetic-guided versus standard prophylaxis in hemophilia: a systematic review and meta-analysis. J Thromb Haemost 2023; 21:3432-3449. [PMID: 37739039 DOI: 10.1016/j.jtha.2023.08.031] [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: 03/10/2023] [Revised: 08/11/2023] [Accepted: 08/29/2023] [Indexed: 09/24/2023]
Abstract
BACKGROUND With population pharmacokinetic (PK) modeling more readily available and PK-guided prophylaxis endorsed by current hemophilia guidelines, we conducted a systematic review to summarize current evidence in the literature. OBJECTIVES To assess the efficacy of PK-guided compared with non-PK-guided prophylaxis. METHODS We did not restrict inclusion to specific study design labels and included all studies consisting of at least one distinct cohort arm receiving PK-guided prophylaxis. We searched the following databases from inception to date of search: MEDLINE, Embase, CENTRAL, ClinicalTrials.gov, and the EU Clinical Trial Register. Following title, abstract, and full-text screening conducted independently by 2 review authors, we summarized studies qualitatively and synthesized included randomized clinical trials (RCTs) quantitatively by fitting random-effects models. RESULTS Search of databases on February 3, 2023, yielded 25 studies fitting our inclusion criteria. Of those, only 2 RCTs and 17 nonrandomized studies included a standard prophylaxis comparator group. Furthermore, risk of bias in the latter was substantial, primarily due to before-after study designs and retrospective comparator groups. Thus, nonrandomized studies were only presented qualitatively. A random-effects meta-analysis of the 2 identified RCT remained inconclusive with regards to bleeding outcomes (ratio of means, 1.15; 95% CI, 0.85-1.56) and factor consumption (ratio of means, 0.82; 95% CI, 0.58-1.18). CONCLUSION Evidence in the literature suggesting a clinical benefit of PK-guided over standard fixed-dose prophylaxis was weak and mainly found in nonrandomized studies limited by lack of concurrent controls, heterogeneity in outcome reporting, small sample sizes, and high risk of bias.
Collapse
Affiliation(s)
- Daniel Kraemmer
- Clinical Division of Hematology and Hemostaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Oliver Königsbrügge
- Clinical Division of Hematology and Hemostaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Florian Moik
- Clinical Division of Hematology and Hemostaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria; Division of Oncology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Brigitte Wildner
- University Library, Medical University of Vienna, Vienna, Austria
| | - Cihan Ay
- Clinical Division of Hematology and Hemostaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - Ingrid Pabinger
- Clinical Division of Hematology and Hemostaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria.
| |
Collapse
|
4
|
Goedhart TMHJ, Janssen A, Mathôt RAA, Cnossen MH. The road to implementation of pharmacokinetic-guided dosing of factor replacement therapy in hemophilia and allied bleeding disorders. Identifying knowledge gaps by mapping barriers and facilitators. Blood Rev 2023; 61:101098. [PMID: 37321952 DOI: 10.1016/j.blre.2023.101098] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 04/02/2023] [Accepted: 05/07/2023] [Indexed: 06/17/2023]
Abstract
Clinical guidelines and expert groups recommend the use of pharmacokinetic (PK)-guided dosing of factor replacement therapy for the treatment of bleeding disorders, especially for patients with hemophilia. Although PK-guided dosing is increasingly applied, it is generally not considered standard clinical practice. The aim of this scoping review is to map barriers and facilitators for the implementation of PK-guided dosing in clinical practice and to identify knowledge gaps. A literature search was performed and 110 articles were included that describe PK-guided dosing in patients with bleeding disorders, mostly hemophilia A. We defined two overarching themes, efficacy and feasibility, and discuss five topics within each theme. For each topic, barriers, facilitators and knowledge gaps were described. Although consensus was found with regard to some topics, contradicting reports were found for others, especially with respect to the efficacy of PK-guided dosing. These contradictions highlight the need for future research to elucidate current ambiguities.
Collapse
Affiliation(s)
- Tine M H J Goedhart
- Department of Pediatric Hematology and Oncology, Erasmus MC Sophia Children's Hospital, University Medical Center Rotterdam, Rotterdam, the Netherlands.
| | - A Janssen
- Department of Clinical Pharmacology - Hospital Pharmacy, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands.
| | - Ron A A Mathôt
- Department of Clinical Pharmacology - Hospital Pharmacy, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, the Netherlands.
| | - Marjon H Cnossen
- Department of Pediatric Hematology and Oncology, Erasmus MC Sophia Children's Hospital, University Medical Center Rotterdam, Rotterdam, the Netherlands.
| |
Collapse
|
5
|
Urasiński T, Paczóska K, Badowska W, Bobrowska H, Dakowicz Ł, Dobaczewski G, Latos-Grażyńska E, Karolczyk G, Klukowska A, Kołtan A, Wojdalska M, Łaguna P, Niedźwiedzki M, Pietrys D, Radoń-Proskura J, Radwańska M, Rurańska I, Szczepański T, Wasiński D, Woźnica-Karczmarz I, Zielezińska K, Królak A, Ociepa T. Real pandemic world results of pharmacokinetic-tailored personalized prophylaxis of bleeds in Polish children and adolescents with severe hemophilia A. Front Pediatr 2023; 11:1084539. [PMID: 36911027 PMCID: PMC9996297 DOI: 10.3389/fped.2023.1084539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 02/08/2023] [Indexed: 02/25/2023] Open
Abstract
Introduction In 2020, the new nationwide protocol of prophylaxis in Polish plasma-derived FVIII (pdFVIII) previously treated patients (PTPs) with severe hemophilia A (sHA) was introduced, resulting in the necessity of switching from pdFVIII to recombinant FVIII (octocog-alpha; rFVIII). The study aimed to: (1) assess the safety of switching from pdFVIII to rFVIII, (2) assess the safety and efficacy of pharmacokinetically based (PK-based) personalized prophylaxis in severe hemophilia A. Patients and methods 151 children and adolescents receiving prophylaxis with a standard dose (40 U/kg 3 x weekly) of pdFVIII were included in this study. Annualized bleeding rate (ABR) and annualized joint bleeding rate (AJBR) were analyzed for all patients before enrollment. Using myPKFiT application, pharmacokinetic (PK) analysis followed by the selection of the optimal model of prophylaxis was performed in all patients. Two possible models of prophylaxis (standard-dose rFVIII versus PK-based rFVIII) were discussed, with parents leaving the choice to their decision. Parents reported all episodes of bleeds. Screening for inhibitor was performed every 3 months. ABR and AJBR were prospectively analyzed again after a minimum follow-up time of 26 weeks. Results 141/151 (93.4%) patients completed the study. 34 patients decided to continue standard prophylaxis with rFVIII (Group I), whereas 107 were switched to PK-based prophylaxis (Group II). The risk of inhibitor development could be assessed in 137/151 (90.7%) patients. Only 2/137 (1.47%) patients (both on PK-based prophylaxis) developed low-titer inhibitor with its spontaneous elimination. The retrospective analysis of bleeds during the last 12 months of standard pdFVIII prophylaxis revealed that patients who decided to continue standard prophylaxis had historically lower ABR and AJBR than those who started PK-based personalized prophylaxis. After a minimum of 26 weeks, ABR and AJBR improved significantly in both groups. There was no significant difference in ABR and AJBR between Group I and Group II during the follow-up period. However, the rate of reduction of ABR and AJBR was higher in patients on PK-based personalized prophylaxis. Conclusion (1) Switching from pdFVIII to rFVIII (octocog-alpha) in PTPs with sHA is safe, (2) PK-based personalized prophylaxis may decrease ABR and AJBR in children and adolescents with sHA.
Collapse
Affiliation(s)
- Tomasz Urasiński
- Department of Pediatrics, Hemato-Oncology and Gastroenterology, Pomeranian Medical University, Szczecin, Poland
| | - Klaudia Paczóska
- Department of Pediatrics, Hemato-Oncology and Gastroenterology, Pomeranian Medical University, Szczecin, Poland
| | - Wanda Badowska
- Department of Pediatric Oncology and Hematology, School of Medicine, University of Warmia Mazury, Olsztyn, Poland
| | | | - Łucja Dakowicz
- Department of Pediatric Oncology and Hematology, Medical University of Białystok, Białystok, Poland
| | - Grzegorz Dobaczewski
- Department of Bone Marrow Transplantation, Pediatric Oncology and Hematology, Wrocław Medical University, Wrocław, Poland
| | - Elżbieta Latos-Grażyńska
- Department of Bone Marrow Transplantation, Pediatric Oncology and Hematology, Wrocław Medical University, Wrocław, Poland
| | - Grażyna Karolczyk
- II Department of Pediatrics, Collegium Medicum, Jan Kochanowski University, Kielce, Poland
| | - Anna Klukowska
- Department of Pediatric Oncology, Hematology and Transplantation, Medical University of Warsaw, Warszawa, Poland
| | - Andrzej Kołtan
- Department of Pediatrics, Hematology and Oncology, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Magdalena Wojdalska
- Department of Pediatrics, Oncology and Hematology, Medical University of Lodz, Łódź, Poland
| | - Paweł Łaguna
- Department of Pediatric Oncology, Hematology and Transplantation, Medical University of Warsaw, Warszawa, Poland
| | - Maciej Niedźwiedzki
- Department of Pediatrics, Hematology and Oncology, Medical University of Gdańsk, Gdańsk, Poland
| | - Danuta Pietrys
- Department of Pediatric Oncology and Hematology, Collegium Medicum, Jagiellonian University, Kraków, Poland
| | - Julia Radoń-Proskura
- Department of Pediatrics, Hematology and Oncology, Medical University of Gdańsk, Gdańsk, Poland
| | - Monika Radwańska
- Department of Pediatric Oncology and Hematology, College of Medical Sciences, University of Rzeszów, Rzeszów, Poland
| | - Iwona Rurańska
- Department of Pediatrics, Hematology and Oncology, Medical University of Silesia, Katowice, Poland
| | - Tomasz Szczepański
- Department of Pediatrics, Hematology and Oncology, Medical University of Silesia, Katowice, Poland
| | - Dariusz Wasiński
- Department of Pediatric Hematology and Oncology, Collegium Medicum, University of Zielona Góra, Zielona Góra, Poland
| | | | - Karolina Zielezińska
- Department of Pediatrics, Hemato-Oncology and Gastroenterology, Pomeranian Medical University, Szczecin, Poland
| | - Aleksandra Królak
- Department of Pediatrics, Hemato-Oncology and Gastroenterology, Pomeranian Medical University, Szczecin, Poland
| | - Tomasz Ociepa
- Department of Pediatrics, Hemato-Oncology and Gastroenterology, Pomeranian Medical University, Szczecin, Poland
| |
Collapse
|
6
|
Ai D, Huang K, Li G, Zhen Y, Wu X, Zhang N, Huo A, Chen Z, Wu R. Exploration of the minimum necessary FVIII level at different physical activity levels in pediatric patients with hemophilia A. Front Pediatr 2022; 10:1045070. [PMID: 36389359 PMCID: PMC9665406 DOI: 10.3389/fped.2022.1045070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 10/13/2022] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Physical activity can increase joint stability and reduce the risk of injury in hemophilia patients. There is limited clinical data on target trough FVIII levels during physical activity in hemophilia A patients. Hence, this study aimed to explore the target trough FVIII level required to avoid bleeding during different physical activities in hemophilia A patients. METHODS Patients with severe or moderate hemophilia A, who underwent pharmacokinetics (PK) tests at our center were enrolled in this study. Physical activities and clinical information such as bleeding were recorded. The FVIII level during physical activity was calculated by the WAPPS-Hemo. RESULTS A total of 105 patients were enrolled in this study. A total of 373 physical activities were recorded, of which 57.6% (215/373) was low-risk activities and the remaining 42.4% (158/373) was medium-risk activities. Most common physical activities were bicycling (59.0%), swimming (43.8%), running (48.6%), and jumping rope (41.0%). The FVIII trough level of low-risk physical activity was 3.8 IU/dl (AUC = 0.781, p = 0.002) and moderate-risk physical activity was 7.7 IU/dl (AUC = 0.809, p < 0.001). FVIII trough levels [low-risk activities: 6.1 (3.1, 13.2) IU/dl vs. 7.7 (2.3, 10.5) IU/dl, moderate-risk activities: 9.6 (5.8, 16.9) IU/dl vs. 10.2 (5.5, 11.0) IU/dl] were not statistically different between the mild arthropathy group and the moderate-severe arthropathy group. Multiple bleeding risk tended to increase with physical activities classified as moderate-risk (OR [95% CI]: 3.815 [1.766-8.238], p = 0.001). CONCLUSION The minimum necessary FVIII level increased with higher risk physical activity, irrespective of arthropathy.
Collapse
Affiliation(s)
- Di Ai
- Hematology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Kun Huang
- Hematology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Gang Li
- Hematologic Disease Laboratory, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Yingzi Zhen
- Hematology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Xinyi Wu
- Hematology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Ningning Zhang
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Aihua Huo
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Zhenping Chen
- Hematologic Disease Laboratory, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Runhui Wu
- Hematology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| |
Collapse
|