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Lewandowska M, Nasr S, Shapiro AD. Therapeutic and technological advancements in haemophilia care: Quantum leaps forward. Haemophilia 2022; 28 Suppl 4:77-92. [PMID: 35521732 DOI: 10.1111/hae.14531] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 02/21/2022] [Accepted: 02/21/2022] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Recent technological innovations in haemophilia have advanced at an astounding pace, including gene therapy programmes and bioengineered molecules for prophylaxis, products that reduce treatment burden through half-life extension, unique mechanisms of action, and subcutaneous administration. Additional technological advancements have emerged that are anticipated to further transform haemophilia care. AIM Review new and emerging haemophilia therapies, including replacement and bypassing products, digital applications, utilisation of big data, and personalised medicine. METHODS Data were obtained from peer-reviewed presentations/publications, and ongoing studies in haemophilia, ultrasonography, and artificial intelligence (AI). RESULTS Available treatments include new recombinant factors VIII (FVIII) and IX (FIX), extended half-life FVIII/IX products, a new FVIIa product for inhibitor patients, and a FVIIIa-mimetic. Several novel therapeutics are in clinical trials, including FVIIIa mimetics and inhibitors of naturally-occurring anticoagulants. Ongoing gene therapy trials suggest that a single vector infusion using an optimised construct can produce factor activity that reduces bleeding to near zero for years. Today, persons with haemophilia (PwH) approach a lifespan comparable to that of the general population, presenting treatment challenges for age-related co-morbidities. Technological innovations have broadened beyond therapeutics to include large database analyses utilising remote data collection with handheld devices, and to tailor AI applications. Current development efforts include patient-performed ultrasonography, algorithms for scan interpretation, and point-of-care haemostatic testing devices. CONCLUSIONS We have entered a golden age for haemophilia treatment and care with wide-ranging advancements targeting improved quality of life (QoL). Future-focused efforts by clinical and patient communities may provide equitable access and care for people impacted by haemophilia worldwide.
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Affiliation(s)
| | | | - Amy D Shapiro
- Indiana Hemophilia & Thrombosis Center, Inc., Indianapolis, Indiana, USA
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Chia J, Pestel S, Glauser I, Emmrich K, Hardy MP, Mischnik M, Raquet E, Tomasetig V, Claar P, Zalewski A, Bass GT, Turnbull V, Chen CG, Wilson MJ, Panousis C, Weimer T, Andrews A, Verhagen AM, Dower SK. Increased potency of recombinant VWF D'D3 albumin fusion proteins engineered for enhanced affinity for coagulation factor VIII. J Thromb Haemost 2021; 19:2710-2725. [PMID: 34333849 DOI: 10.1111/jth.15480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 07/28/2021] [Accepted: 07/29/2021] [Indexed: 01/22/2023]
Abstract
BACKGROUND We have recently reported on a recombinant von Willebrand factor (VWF) D'D3 albumin fusion protein (rD'D3-FP) developed to extend the half-life of coagulation factor VIII (FVIII) for the treatment of hemophilia A. Based on predictive modelling presented in this study, we hypothesized that modifying rD'D3-FP to improve FVIII interaction would reduce exchange with endogenous VWF and provide additional FVIII half-life benefit. OBJECTIVES The aim of this study was to identify novel rD'D3-FP variants with enhanced therapeutic efficacy in extending FVIII half-life. METHODS Through both directed mutagenesis and random mutagenesis using a novel mammalian display platform, we identified novel rD'D3-FP variants with increased affinity for FVIII (rVIII-SingleChain) under both neutral and acidic conditions and assessed their ability to extend FVIII half-life in vitro and in vivo. RESULTS In rat preclinical studies, rD'D3-FP variants with increased affinity for FVIII displayed enhanced potency, with reduced dose levels required to achieve equivalent rVIII-SingleChain half-life extension. In cell-based imaging studies in vitro, we also demonstrated reduced dissociation of rVIII-SingleChain from the rD'D3-FP variants within acidic endosomes and more efficient co-recycling of the rD'D3-FP/rVIII-SingleChain complex via the FcRn recycling system. CONCLUSIONS In summary, at potential clinical doses, the rD'D3-FP variants provide marked benefits with respect to dose levels and half-life extension of co-administered FVIII, supporting their development for use in the treatment of hemophilia A.
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Affiliation(s)
- Jenny Chia
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | | | - Isabelle Glauser
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | - Kerstin Emmrich
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | - Matthew P Hardy
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | | | | | - Vesna Tomasetig
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | | | - Anton Zalewski
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | - Gregory T Bass
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | - Victor Turnbull
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | - Chao-Guang Chen
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | - Michael J Wilson
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | - Con Panousis
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | | | - Arna Andrews
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | - Anne M Verhagen
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
| | - Steve K Dower
- CSL Limited, Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria, Australia
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Abstract
Haemophilia is an inherited bleeding disorder in which the haemostatic defect results from deficiency of coagulation factor VIII (FVIII) in haemophilia A or factor IX (FIX) in haemophilia B. Traditional treatments for haemophilia have largely worked by directly replacing the missing coagulation factor, but face challenges due to the short half-life of FVIII and FIX, the need for frequent intravenous access and development of neutralising antibodies to coagulation factors (inhibitors). Recent advances in haemophilia therapy have worked to eliminate these challenges. Half-life extension of factor concentrates has lengthened the time needed between infusions, enhancing quality of life. Subcutaneous administration of therapeutics utilising alternative mechanisms to overcome inhibitors have expanded the options to prevent bleeding. Finally, initial successes with gene therapy offer a cautious hope for durable cure. In the present review, we will discuss currently available treatments, as well as highlight therapeutics in various stages of clinical development for the treatment of haemophilia A and B. In this review, we present therapies that are currently clinically available and highlight therapeutics that are in various stages of clinical development for the treatment of haemophilia A and B.
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Affiliation(s)
- Hannah Fassel
- Tufts University School of Medicine, Boston, MA, USA
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