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  1. Article ; Online: Comment on: Interpreting data on inhibitor development from previously untreated patient studies, beware of premature conclusions.

    Liesner, Dr R J

    Haemophilia : the official journal of the World Federation of Hemophilia

    2018  Volume 24, Issue 4, Page(s) e273–e275

    Language English
    Publishing date 2018-07-13
    Publishing country England
    Document type Letter ; Comment
    ZDB-ID 1229713-6
    ISSN 1365-2516 ; 1351-8216 ; 1355-0691
    ISSN (online) 1365-2516
    ISSN 1351-8216 ; 1355-0691
    DOI 10.1111/hae.13545
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Prophylactic treatment of bleeding episodes in children <12 years with moderate to severe hereditary factor X deficiency (FXD): Efficacy and safety of a high-purity plasma-derived factor X (pdFX) concentrate.

    Liesner, R / Akanezi, C / Norton, M / Payne, J

    Haemophilia : the official journal of the World Federation of Hemophilia

    2018  Volume 24, Issue 6, Page(s) 941–949

    Abstract: Background: Hereditary factor X (FX) deficiency (FXD) affects 1:500 000-1:1 000 000 people worldwide. A novel, high-purity plasma-derived FX concentrate (pdFX) is available in the United States and European Union as replacement therapy for FXD, but data ...

    Abstract Background: Hereditary factor X (FX) deficiency (FXD) affects 1:500 000-1:1 000 000 people worldwide. A novel, high-purity plasma-derived FX concentrate (pdFX) is available in the United States and European Union as replacement therapy for FXD, but data are scarce on pdFX use in children <12 years.
    Aim: This prospective, open-label phase 3 study assessed the safety, efficacy and pharmacokinetics of pdFX in children <12 years with moderate/severe FXD.
    Methods: Subjects aged <12 years with basal plasma FX activity (FX:C) <5 IU/dL received pdFX as prophylactic and on-demand treatment, with doses adjusted to maintain FX:C > 5 IU/dL. After ≥26 weeks and ≥50 exposure days, investigators rated pdFX efficacy for preventing/decreasing bleeds. Secondary endpoints included number and severity of bleeds, trough FX:C and incremental recovery. Safety parameters were adverse events (AEs), inhibitor development and changes in laboratory parameters.
    Results: The study enrolled 9 subjects (0-5 years, n = 4; 6-11 years, n = 5) with severe (n = 8) or moderate (n = 1) FXD. At end of study, investigators rated pdFX efficacy excellent for all subjects. Ten bleeds occurred (n = 3 subjects; 6 major, 3 minor, 1 unassessed for severity). Trough FX:C levels remained >5 IU/dL for all subjects after the last dose adjustment study visit. Mean incremental recovery was significantly lower for younger vs older subjects (1.53 vs 1.91 IU/dL per IU/kg; P = .001). All AEs were unrelated to treatment; no inhibitor development or clinically significant changes in laboratory parameters were observed.
    Conclusions: These results demonstrate the efficacy and safety of pdFX for treating children <12 years with moderate/severe hereditary FXD.
    MeSH term(s) Child ; Child, Preschool ; Dose-Response Relationship, Drug ; Factor X/adverse effects ; Factor X/metabolism ; Factor X/pharmacokinetics ; Factor X/pharmacology ; Factor X Deficiency/complications ; Female ; Hemorrhage/complications ; Hemorrhage/prevention & control ; Humans ; Infant ; Infant, Newborn ; Male ; Plasma/metabolism ; Safety
    Chemical Substances Factor X (9001-29-0)
    Language English
    Publishing date 2018-04-30
    Publishing country England
    Document type Clinical Trial, Phase III ; Journal Article
    ZDB-ID 1229713-6
    ISSN 1365-2516 ; 1351-8216 ; 1355-0691
    ISSN (online) 1365-2516
    ISSN 1351-8216 ; 1355-0691
    DOI 10.1111/hae.13500
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Genotype analysis and identification of novel mutations in a multicentre cohort of patients with hereditary factor X deficiency.

    Mitchell, Michael / Gattens, Michael / Kavakli, Kaan / Liesner, Ri / Payne, Jeanette / Norton, Miranda / Austin, Steven

    Blood coagulation & fibrinolysis : an international journal in haemostasis and thrombosis

    2019  Volume 30, Issue 1, Page(s) 34–41

    Abstract: The objective was to examine the genotypic and phenotypic characteristics of individuals with hereditary factor X deficiency (FXD), a rare autosomal recessive bleeding disorder caused by mutations in the F10 gene located on chromosome 13q34-ter. To ... ...

    Abstract : The objective was to examine the genotypic and phenotypic characteristics of individuals with hereditary factor X deficiency (FXD), a rare autosomal recessive bleeding disorder caused by mutations in the F10 gene located on chromosome 13q34-ter. To date, 149 F10 mutations have been identified as contributory to FXD. Three open-label phase 3 trials enrolled individuals with mild, moderate, or severe FXD. Individuals received plasma-derived factor X concentrate as routine prophylaxis, to treat bleeds, and/or during or after surgery. F10 genotyping was performed (studies 1 and 2) or genotype data was collected at screening (study 3), and identified F10 mutations were compared against the Human Gene Mutation Database to assess novelty. Genotype data were combined to evaluate the number, type, and novelty of the F10 mutations identified. Genotype data were available for 24 of 27 individuals with mild (n = 2), moderate (n = 2), or severe (n = 20) FXD. Analyses identified 22 separate mutations, including 15 missense mutations, 2 deletions, 4 splice site mutations, and 1 nonsense mutation. Sixteen individuals had homozygous mutations; 8 had compound heterozygous mutations. Eleven unique novel mutations (all compound heterozygous) were identified in seven individuals: six missense mutations, three splice site mutations, one exon deletion, and one nonsense mutation. In silico analyses strongly supported the pathogenicity of all novel mutations. The identification of 11 novel F10 mutations provides a substantial contribution to the mutations known to cause FXD.
    MeSH term(s) Clinical Trials as Topic ; Cohort Studies ; Computer Simulation ; DNA Mutational Analysis ; Factor X/genetics ; Factor X Deficiency/etiology ; Factor X Deficiency/genetics ; Genetic Association Studies ; Genotype ; Humans ; Mutation
    Chemical Substances Factor X (9001-29-0)
    Language English
    Publishing date 2019-02-28
    Publishing country England
    Document type Journal Article ; Multicenter Study
    ZDB-ID 1033551-1
    ISSN 1473-5733 ; 0957-5235
    ISSN (online) 1473-5733
    ISSN 0957-5235
    DOI 10.1097/MBC.0000000000000787
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Modern management of severe platelet function disorders.

    Alamelu, Jayanthi / Liesner, Ri

    British journal of haematology

    2010  Volume 149, Issue 6, Page(s) 813–823

    Abstract: Severe platelet function defects are rare disorders that require expertise in diagnosis and management. Therefore patients with such disorders should be referred to and managed in centres with the full laboratory repertoire of tests and clinical support ... ...

    Abstract Severe platelet function defects are rare disorders that require expertise in diagnosis and management. Therefore patients with such disorders should be referred to and managed in centres with the full laboratory repertoire of tests and clinical support necessary to optimise their quality of care. The aim of this review is to discuss the management of these patients in various clinical situations including surgical intervention.
    MeSH term(s) Bernard-Soulier Syndrome/diagnosis ; Bernard-Soulier Syndrome/therapy ; Blood Platelet Disorders/complications ; Blood Platelet Disorders/diagnosis ; Blood Platelet Disorders/therapy ; Female ; Hemorrhage/etiology ; Hemorrhage/therapy ; Humans ; Perioperative Care/methods ; Pregnancy ; Pregnancy Complications, Hematologic/therapy ; Thrombasthenia/diagnosis ; Thrombasthenia/therapy
    Language English
    Publishing date 2010-06
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 80077-6
    ISSN 1365-2141 ; 0007-1048
    ISSN (online) 1365-2141
    ISSN 0007-1048
    DOI 10.1111/j.1365-2141.2010.08191.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Long-term tolerability, immunogenicity and efficacy of Nuwiq

    Klukowska, A / Szczepański, T / Vdovin, V / Knaub, S / Bichler, J / Jansen, M / Dzhunova, I / Liesner, R J

    Haemophilia : the official journal of the World Federation of Hemophilia

    2018  Volume 24, Issue 4, Page(s) 595–603

    Abstract: Introduction: Nuwiq: Aim/methods: This study (GENA-13) was an extension of the GENA-03 study in which previously treated children aged 2-12 years with severe haemophilia A received Nuwiq: Results: Of 59 patients enrolled in GENA-03, 49 continued ... ...

    Abstract Introduction: Nuwiq
    Aim/methods: This study (GENA-13) was an extension of the GENA-03 study in which previously treated children aged 2-12 years with severe haemophilia A received Nuwiq
    Results: Of 59 patients enrolled in GENA-03, 49 continued Nuwiq
    Conclusion: Long-term treatment with Nuwiq
    MeSH term(s) Child ; Child, Preschool ; Factor VIII/adverse effects ; Factor VIII/immunology ; Factor VIII/therapeutic use ; Female ; Hemophilia A/complications ; Hemophilia A/drug therapy ; Hemophilia A/immunology ; Hemorrhage/complications ; Hemorrhage/prevention & control ; Humans ; Male ; Recombinant Proteins/adverse effects ; Recombinant Proteins/immunology ; Recombinant Proteins/therapeutic use ; Safety ; Severity of Illness Index ; Treatment Outcome
    Chemical Substances Recombinant Proteins ; Factor VIII (9001-27-8)
    Language English
    Publishing date 2018-03-26
    Publishing country England
    Document type Clinical Trial, Phase III ; Journal Article
    ZDB-ID 1229713-6
    ISSN 1365-2516 ; 1351-8216 ; 1355-0691
    ISSN (online) 1365-2516
    ISSN 1351-8216 ; 1355-0691
    DOI 10.1111/hae.13460
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Does thrombophilia cause Perthes' disease in children?

    Liesner, R J

    The Journal of bone and joint surgery. British volume

    1999  Volume 81, Issue 4, Page(s) 565–566

    MeSH term(s) Child ; Humans ; Legg-Calve-Perthes Disease/complications ; Thrombophilia/complications
    Language English
    Publishing date 1999-07
    Publishing country England
    Document type Comment ; Editorial
    ZDB-ID 220626-2
    ISSN 2044-5377 ; 0301-620X ; 0447-9076
    ISSN (online) 2044-5377
    ISSN 0301-620X ; 0447-9076
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: The B-Natural study-The outcome of immune tolerance induction therapy in patients with severe haemophilia B.

    Astermark, Jan / Holstein, Katharina / Abajas, Yasmina L / Kearney, Susan / Croteau, Stacy E / Liesner, Riana / Funding, Eva / Kempton, Christine L / Acharya, Suchitra / Lethagen, Stefan / LeBeau, Petra / Bowen, Joel / Berntorp, Erik / Shapiro, Amy D

    Haemophilia : the official journal of the World Federation of Hemophilia

    2021  Volume 27, Issue 5, Page(s) 802–813

    Abstract: Introduction: Inhibitors develop less frequently in haemophilia B (HB) than haemophilia A (HA). However, when present, the success of tolerization by immune tolerance induction (ITI) therapy is lower and the risk of complications higher.: Aim: To ... ...

    Abstract Introduction: Inhibitors develop less frequently in haemophilia B (HB) than haemophilia A (HA). However, when present, the success of tolerization by immune tolerance induction (ITI) therapy is lower and the risk of complications higher.
    Aim: To evaluate the use and outcome of ITI in patients with HB and inhibitors.
    Methods: Subjects include singletons or siblings with a current/history of inhibitors enrolled in B-Natural-an observational study designed to increase understanding of clinical management of patients with HB. Patients were followed for 6 months and information on demographics, medical and social history, and treatment were recorded.
    Results: Twenty-nine patients with severe HB and inhibitors were enrolled in 24 centres. Twenty-two underwent one or more courses of ITI with or without immune suppression. Eight patients (36.4%) were successfully tolerized after the first course of ITI. One of these successes (12.5%) experienced allergic manifestations, whereas the corresponding number for the 10 treatment failures was five (50%). One of seven (14.2%) patients with large deletions and three of eight (37.5%) with nonsense mutations were tolerized at the first attempt, and all patients experiencing nephrosis either failed or were on-going. At study end, 11 (50%) were considered successfully tolerized after one or more ITI courses, three were unsuccessful, and eight were still undergoing treatment.
    Conclusion: Our data underscore the possibilities and difficulties of achieving tolerization in patients with HB with inhibitors. The type of mutation and complications appear to correlate with ITI outcome, but more accurate definitions of successful ITI are warranted.
    MeSH term(s) Factor VIII/genetics ; Factor VIII/therapeutic use ; Hemophilia A/drug therapy ; Hemophilia A/genetics ; Hemophilia B/drug therapy ; Hemophilia B/genetics ; Humans ; Immune Tolerance ; Immunosuppression
    Chemical Substances Factor VIII (9001-27-8)
    Language English
    Publishing date 2021-06-12
    Publishing country England
    Document type Journal Article ; Observational Study
    ZDB-ID 1229713-6
    ISSN 1365-2516 ; 1351-8216 ; 1355-0691
    ISSN (online) 1365-2516
    ISSN 1351-8216 ; 1355-0691
    DOI 10.1111/hae.14357
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  8. Article ; Online: The changing face of immune tolerance induction in haemophilia A with the advent of emicizumab.

    Carcao, Manuel / Escuriola-Ettingshausen, Carmen / Santagostino, Elena / Oldenburg, Johannes / Liesner, Ri / Nolan, Beatrice / Bátorová, Angelika / Haya, Saturnino / Young, Guy

    Haemophilia : the official journal of the World Federation of Hemophilia

    2019  Volume 25, Issue 4, Page(s) 676–684

    Abstract: Introduction: As a result of the new treatment paradigm that the haemophilia community will face with the availability of novel (non-factor) therapies, an updated consensus on ITI recommendations and inhibitor management strategies is needed.: Aim: ... ...

    Abstract Introduction: As a result of the new treatment paradigm that the haemophilia community will face with the availability of novel (non-factor) therapies, an updated consensus on ITI recommendations and inhibitor management strategies is needed.
    Aim: The Future of Immunotolerance Treatment (FIT) group was established to contemplate, determine and recommend the best management options for patients with haemophilia A and inhibitors.
    Discussion and conclusions: Despite the considerable success of emicizumab in the management of inhibitor patients, the FIT group still sees the importance of eradicating inhibitors. However, the availability of emicizumab and other non-factor therapies in the future might impact greatly on how ITI is undertaken. Theoretically, concomitant use of emicizumab and FVIII might allow emicizumab to effectively prevent bleeding with lower dose ITI regimens. This might allow for the greater adoption of low-dose/low-frequency FVIII ITI regimens, which may result in a reduced need for central venous access devices while still maintaining a reasonable likelihood of ITI success. The FIT group proposes a new management algorithm for current ITI (without emicizumab) and a hypothetical new approach with the availability of emicizumab. As there are no published data regarding the concomitant use of emicizumab and FVIII for ITI, the FIT Expert group encourages the undertaking of properly conducted prospective studies to explore these approaches further.
    MeSH term(s) Antibodies, Bispecific/pharmacology ; Antibodies, Monoclonal, Humanized/pharmacology ; Antibodies, Neutralizing/immunology ; Dose-Response Relationship, Drug ; Factor VIII/immunology ; Hemophilia A/drug therapy ; Hemophilia A/immunology ; Humans ; Immune Tolerance/drug effects ; Risk Assessment
    Chemical Substances Antibodies, Bispecific ; Antibodies, Monoclonal, Humanized ; Antibodies, Neutralizing ; emicizumab (7NL2E3F6K3) ; Factor VIII (9001-27-8)
    Language English
    Publishing date 2019-04-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 1229713-6
    ISSN 1365-2516 ; 1351-8216 ; 1355-0691
    ISSN (online) 1365-2516
    ISSN 1351-8216 ; 1355-0691
    DOI 10.1111/hae.13762
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Final results of the PUPs B-LONG study: evaluating safety and efficacy of rFIXFc in previously untreated patients with hemophilia B.

    Nolan, Beatrice / Klukowska, Anna / Shapiro, Amy / Rauch, Antoine / Recht, Michael / Ragni, Margaret / Curtin, Julie / Gunawardena, Sriya / Mukhopadhyay, Sutirtha / Jayawardene, Deepthi / Winding, Bent / Fischer, Kathelijn / Liesner, Raina

    Blood advances

    2021  Volume 5, Issue 13, Page(s) 2732–2739

    Abstract: PUPs B-LONG evaluated the safety and efficacy of recombinant factor IX Fc fusion protein (rFIXFc) in previously untreated patients (PUPs) with hemophilia B. In this open-label, phase 3 study, male PUPs (age <18 years) with hemophilia B (≤2 IU/dL of ... ...

    Abstract PUPs B-LONG evaluated the safety and efficacy of recombinant factor IX Fc fusion protein (rFIXFc) in previously untreated patients (PUPs) with hemophilia B. In this open-label, phase 3 study, male PUPs (age <18 years) with hemophilia B (≤2 IU/dL of endogenous factor IX [FIX]) were to receive treatment with rFIXFc. Primary end point was occurrence of inhibitor development, with a secondary end point of annualized bleed rate (ABR). Of 33 patients who received ≥1 dose of rFIXFc, 26 (79%) were age <1 year at study entry and 6 (18%) had a family history of inhibitors. Twenty-eight patients (85%) received prophylaxis; median dosing interval was 7 days, with an average weekly dose of 58 IU/kg. Twenty-seven patients (82%) completed the study. Twenty-one (64%), 26 (79%), and 28 patients (85%) had ≥50, ≥20, and ≥10 exposure days (EDs) to rFIXFc, respectively. One patient (3.03%; 95% confidence interval, 0.08% to 15.76%) developed a low-titer inhibitor after 11 EDs; no high-titer inhibitors were detected. Twenty-three patients (70%) had 58 treatment-emergent serious adverse events; 2 were assessed as related (FIX inhibition and hypersensitivity in 1 patient, resulting in withdrawal). Median ABR was 1.24 (interquartile range, 0.00-2.49) for patients receiving prophylaxis. Most (>85%) bleeding episodes required only 1 infusion for bleed resolution. In this first study reporting results with rFIXFc in pediatric PUPs with hemophilia B, rFIXFc was well tolerated, with the adverse event profile as expected in a pediatric hemophilia population. rFIXFc was effective, both as prophylaxis and in the treatment of bleeding episodes. This trial was registered at www.clinicaltrials.gov as #NCT02234310.
    MeSH term(s) Adolescent ; Blood Coagulation Tests ; Child ; Hemophilia A ; Hemophilia B/drug therapy ; Hemorrhage ; Humans ; Male
    Language English
    Publishing date 2021-07-09
    Publishing country United States
    Document type Clinical Trial, Phase III ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2915908-8
    ISSN 2473-9537 ; 2473-9529
    ISSN (online) 2473-9537
    ISSN 2473-9529
    DOI 10.1182/bloodadvances.2020004085
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  10. Article ; Online: Transgenic cotton and sterile insect releases synergize eradication of pink bollworm a century after it invaded the United States.

    Tabashnik, Bruce E / Liesner, Leighton R / Ellsworth, Peter C / Unnithan, Gopalan C / Fabrick, Jeffrey A / Naranjo, Steven E / Li, Xianchun / Dennehy, Timothy J / Antilla, Larry / Staten, Robert T / Carrière, Yves

    Proceedings of the National Academy of Sciences of the United States of America

    2020  Volume 118, Issue 1

    Abstract: Invasive organisms pose a global threat and are exceptionally difficult to eradicate after they become abundant in their new habitats. We report a successful multitactic strategy for combating the pink bollworm ( ...

    Abstract Invasive organisms pose a global threat and are exceptionally difficult to eradicate after they become abundant in their new habitats. We report a successful multitactic strategy for combating the pink bollworm (
    MeSH term(s) Animals ; Animals, Genetically Modified ; Arizona ; Bacillus thuringiensis/genetics ; Bacillus thuringiensis Toxins/genetics ; Bacillus thuringiensis Toxins/metabolism ; Computer Simulation ; Disease Eradication/economics ; Disease Eradication/methods ; Gossypium/genetics ; Infertility/genetics ; Insecticides/metabolism ; Mexico ; Moths/genetics ; Moths/growth & development ; Moths/pathogenicity ; Pest Control, Biological/methods ; Plants, Genetically Modified ; Southwestern United States
    Chemical Substances Bacillus thuringiensis Toxins ; Insecticides
    Language English
    Publishing date 2020-12-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2019115118
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