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Saro R, Allegro V, Merlo M, Dore F, Sinagra G, Porcari A. Specific Therapy in Transthyretin Amyloid Cardiomyopathy: Future Perspectives Beyond Tafamidis. Heart Fail Clin 2024; 20:343-352. [PMID: 38844305 DOI: 10.1016/j.hfc.2024.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
Transthyretin amyloid cardiomyopathy (ATTR-CM) is a relatively prevalent cause of morbidity and mortality. Over the recent years, development of disease-modifying treatments has enabled stabilization of the circulating transthyretin tetramer and suppression of its hepatic production, resulting in a remarkable improvement in survival of patients with ATTR-CM. Second-generation drugs for silencing are currently under investigation in randomized clinical trials. In vivo gene editing of transthyretin has been achieving unanticipated suppression of hepatic production in ATTR-CM. Trials of antibodies inducing the active removal of transthyretin amyloid deposits in the heart are ongoing, and evidence has gathered for exceptional spontaneous regression of ATTR-CM.
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Affiliation(s)
- Riccardo Saro
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Via P. Valdoni 7, 34100, Trieste, Italy; European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Via P. Valdoni 7, 34100, Trieste, Italy
| | - Valentina Allegro
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Via P. Valdoni 7, 34100, Trieste, Italy; European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Via P. Valdoni 7, 34100, Trieste, Italy
| | - Marco Merlo
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Via P. Valdoni 7, 34100, Trieste, Italy; European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Via P. Valdoni 7, 34100, Trieste, Italy
| | - Franca Dore
- Head of Nuclear Medicine Division, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Trieste, Italy
| | - Gianfranco Sinagra
- Center for Diagnosis and Treatment of Cardiomyopathies, Cardiovascular Department, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI), University of Trieste, Via P. Valdoni 7, 34100, Trieste, Italy; European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart, Via P. Valdoni 7, 34100, Trieste, Italy
| | - Aldostefano Porcari
- Department of Nuclear Medicine, Azienda Sanitaria Universitaria Giuliano-Isontina (ASUGI) and University of Trieste, Via P. Valdoni 7, 34100, Trieste, Italy; National Amyloidosis Centre, Division of Medicine, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, UK.
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2
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Vogel J, Carpinteiro A, Luedike P, Buehning F, Wernhart S, Rassaf T, Michel L. Current Therapies and Future Horizons in Cardiac Amyloidosis Treatment. Curr Heart Fail Rep 2024:10.1007/s11897-024-00669-7. [PMID: 38809394 DOI: 10.1007/s11897-024-00669-7] [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] [Accepted: 05/20/2024] [Indexed: 05/30/2024]
Abstract
PURPOSE OF REVIEW Cardiac amyloidosis (CA) is a condition characterized by misfolding and extracellular deposition of proteins, leading to organ dysfunction. While numerous forms of CA exist, two subtypes dominate clinical prevalence: Transthyretin amyloid (ATTR) and immunoglobulin light chain amyloid. RECENT FINDINGS The current scientific landscape reflects the urgency to advance therapeutic interventions with over 100 ongoing clinical trials. Heart failure treatment is affected by CA phenotype with poor tolerance of otherwise frequently used medications. Treating comorbidities including atrial fibrillation and valvular disease remains a challenge in CA, driven by technical difficulties and uncertain outcomes. Tafamidis is the first ATTR-stabilizer approved with a rapidly growing rate of clinical use. In parallel, various new therapeutic classes are in late-stage clinical trials including silencers, antibodies and genetic therapy. Managing CA is a critical challenge for future heart failure care. This review delineates the current standard-of-care and scientific landscape of CA therapy.
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Affiliation(s)
- Julia Vogel
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Alexander Carpinteiro
- Department of Hematology and Stem Cell Transplantation, West German Cancer Center, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Peter Luedike
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Florian Buehning
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Simon Wernhart
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Tienush Rassaf
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany
| | - Lars Michel
- Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center, University Hospital Essen, Hufelandstraße 55, 45147, Essen, Germany.
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3
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Bart NK, Fatkin D, Gunton J, Hare JL, Korczyk D, Kwok F, Lam K, Russell D, Sidiqi H, Sutton T, Gibbs SDJ, Mollee P, Thomas L. 2024 Australia-New Zealand Expert Consensus Statement on Cardiac Amyloidosis. Heart Lung Circ 2024; 33:420-442. [PMID: 38570258 DOI: 10.1016/j.hlc.2023.11.027] [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: 11/09/2023] [Accepted: 11/17/2023] [Indexed: 04/05/2024]
Abstract
Over the past 5 years, early diagnosis of and new treatments for cardiac amyloidosis (CA) have emerged that hold promise for early intervention. These include non-invasive diagnostic tests and disease modifying therapies. Recently, CA has been one of the first types of cardiomyopathy to be treated with gene editing techniques. Although these therapies are not yet widely available to patients in Australia and New Zealand, this may change in the near future. Given the rapid pace with which this field is evolving, it is important to view these advances within the Australian and New Zealand context. This Consensus Statement aims to update the Australian and New Zealand general physician and cardiologist with regards to the diagnosis, investigations, and management of CA.
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Affiliation(s)
- Nicole K Bart
- Department of Cardiology, St Vincent's Hospital, Sydney; School of Clinical Medicine, Faculty of Health and Medicine, The University of New South Wales, Sydney, and The Victor Chang Cardiac Research Institute, Sydney, NSW, Australia. http://www.twitter.com/drnikkibart
| | - Diane Fatkin
- Department of Cardiology, St Vincent's Hospital, Sydney; School of Clinical Medicine, Faculty of Health and Medicine, The University of New South Wales, Sydney, and The Victor Chang Cardiac Research Institute, Sydney, NSW, Australia
| | - James Gunton
- Department of Cardiology, Flinders Medical Centre, Adelaide, SA, Australia
| | - James L Hare
- Department of Cardiology, Alfred Health, Melbourne, and Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Vic, Australia
| | - Dariusz Korczyk
- Department of Cardiology, The Princess Alexandra Hospital, Brisbane, Qld, Australia
| | - Fiona Kwok
- Department of Haematology, Westmead Hospital, Sydney, NSW, Australia
| | - Kaitlyn Lam
- Department of Cardiology, Western Australia Advanced Heart Failure and Cardiac Transplant Service, Perth, WA, Australia
| | - David Russell
- Department of Cardiology, Royal Hobart Hospital, Hobart, Tas, Australia
| | - Hasib Sidiqi
- Department of Haematology, Fiona Stanley Hospital, Perth, WA, Australia
| | - Tim Sutton
- Te Whatu Ora Counties Manukau, Auckland; and Department of Cardiology, Auckland, Aotearoa, New Zealand
| | - Simon D J Gibbs
- Department of Haematology, Eastern Health; Epworth Freemasons; and Monash University, Melbourne, Vic, Australia
| | - Peter Mollee
- Queensland Amyloidosis Centre, The Princess Alexandra Hospital, Brisbane; and, School of Medicine, University of Queensland, Brisbane, Qld, Australia
| | - Liza Thomas
- Department of Cardiology, Westmead Hospital, Sydney; Westmead Clinical School, University of Sydney, Sydney; and, South West Clinical School, University of New South Wales, Sydney, NSW, Australia.
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4
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Nie T. Eplontersen: First Approval. Drugs 2024; 84:473-478. [PMID: 38413492 PMCID: PMC11101359 DOI: 10.1007/s40265-024-02008-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Eplontersen (Wainua™) is a ligand-conjugated antisense oligonucleotide directed to TTR, which is being developed by Ionis Pharmaceuticals and AstraZeneca for the treatment of TTR-mediated amyloidosis (ATTR). Eplontersen, which is targeted to the liver by a ligand containing three N-acetyl galactosamine residues, binds to wild-type and variant TTR mRNA, thus reducing the levels of circulating TTR protein and amyloid deposition. Subcutaneous eplontersen reduced serum TTR levels, inhibited neuropathy progression and improved health-related quality of life in patients with polyneuropathy of hereditary ATTR (ATTRv-PN; v for variant) in a phase III trial. Based on these results, eplontersen was approved in the USA for the treatment of ATTRv-PN on 21 December 2023 and is currently undergoing regulatory review for a similar indication in the EU, the UK, Switzerland and Canada. Eplontersen is also undergoing phase III development for ATTR cardiomyopathy. This article summarizes the milestones in the development of eplontersen leading to this first approval for ATTRv-PN.
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Affiliation(s)
- Tina Nie
- Springer Nature, Private Bag 65901, Mairangi Bay, Auckland, 0754, New Zealand.
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Baker BF, Xia S, Partridge W, Engelhardt JA, Tsimikas S, Crooke ST, Bhanot S, Geary RS. Safety and Tolerability of GalNAc 3-Conjugated Antisense Drugs Compared to the Same-Sequence 2'- O-Methoxyethyl-Modified Antisense Drugs: Results from an Integrated Assessment of Phase 1 Clinical Trial Data. Nucleic Acid Ther 2024; 34:18-25. [PMID: 38227794 DOI: 10.1089/nat.2023.0026] [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] [Indexed: 01/18/2024] Open
Abstract
The triantennary N-acetylgalactosamine (GalNAc3) cluster has demonstrated the utility of receptor-mediated uptake of ligand-conjugated antisense drugs targeting RNA expressed by hepatocytes. GalNAc3-conjugated 2'-O-methoxyethyl (2'MOE) modified antisense oligonucleotides (ASOs) have demonstrated a higher potency than the unconjugated form to support lower doses for an equivalent pharmacological effect. We utilized the Ionis integrated safety database to compare four GalNAc3-conjugated and four same-sequence unconjugated 2'MOE ASOs. This assessment evaluated data from eight randomized placebo-controlled dose-ranging phase 1 studies involving 195 healthy volunteers (79 GalNAc3 ASO, 24 placebo; 71 ASO, 21 placebo). No safety signals were identified by the incidence of abnormal threshold values in clinical laboratory tests for either ASO group. However, there was a significant increase in mean alanine transaminase levels compared with placebo in the upper dose range of the unconjugated 2'MOE ASO group. The mean percentage of subcutaneous injections leading to local cutaneous reaction was 30-fold lower in the GalNAc3-conjugated ASO group compared with the unconjugated ASO group (0.9% vs. 28.6%), with no incidence of flu-like reactions (0.0% vs. 0.7%). Three subjects (4.2%) in the unconjugated ASO group discontinued dosing. An improvement in the overall safety and tolerability profile of GalNAc3-conjugated 2'MOE ASOs is evident in this comparison of short-term clinical data in healthy volunteers.
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Affiliation(s)
| | - Shuting Xia
- Ionis Pharmaceuticals, Inc., Carlsbad, California, USA
| | | | | | | | | | - Sanjay Bhanot
- Ionis Pharmaceuticals, Inc., Carlsbad, California, USA
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Yu A, Chen Y, Tsai C, Wu YA, Su M, Chou C, Shun C, Hsueh H, Juang JJ, Lee M, Tseng P, Hsu C, Hsieh S, Ko C, Cheng M, Chao C, Lin Y. Use of Technetium-99m-Pyrophosphate Single-Photon Emission Computed Tomography/Computed Tomography in Monitoring Therapeutic Changes of Eplontersen in Patients With Hereditary Transthyretin Amyloid Cardiomyopathy. J Am Heart Assoc 2024; 13:e030512. [PMID: 38214277 PMCID: PMC10926803 DOI: 10.1161/jaha.123.030512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 12/13/2023] [Indexed: 01/13/2024]
Abstract
BACKGROUND Hereditary transthyretin amyloid cardiomyopathy (hATTR-CM) is a progressive and fatal disease. Recent evidence indicates that bone scintigraphy may serve as a tool to monitor the effectiveness of hATTR-CM treatment. The objective of this study was to examine how eplontersen therapy influences the semiquantitative uptake of technetium-99m-pyrophosphate in individuals diagnosed with hATTR-CM. METHODS AND RESULTS We retrospectively analyzed a prospective cohort from the NEURO-TTRansform trial, including patients with hATTR-CM receiving eplontersen (45 mg/4 weeks). A control group comprised patients with hATTR-CM who had not received eplontersen, inotersen, tafamidis, or patisiran. Technetium-99m-pyrophosphate single-photon emission computed tomography/computed tomography was conducted at baseline and during follow-up. Thirteen patients with hATTR-CM were enrolled, with 6 receiving eplontersen and 7 serving as the control group. The median follow-up time was 544 days. The eplontersen group exhibited a significant decrease in volumetric heart and lung ratio (3.774 to 2.979, P=0.028), whereas the control group showed no significant change (4.079 to 3.915, P=0.237). Patients receiving eplontersen demonstrated a significantly greater reduction in volumetric heart and lung ratio compared with the control group (-20.7% versus -3.4%, P=0.007). CONCLUSIONS The volumetric heart and lung ratio used to quantify technetium-99m-pyrophosphate uptake showed a significant reduction subsequent to eplontersen treatment in individuals diagnosed with hATTR-CM. These findings suggest the potential efficacy of eplontersen in treating hATTR-CM and highlight the value of technetium-99m-pyrophosphate single-photon emission computed tomography/computed tomography as a tool for monitoring therapeutic effectiveness.
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Affiliation(s)
- An‐Li Yu
- Department of Internal Medicine, Division of CardiologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
- Department of Internal Medicine, Division of CardiologyNational Taiwan University Hospital Hsin‐Chu BranchHsinchuTaiwan
| | - Yi‐Chieh Chen
- Department of Nuclear MedicineNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Cheng‐Hsuan Tsai
- Department of Internal Medicine, Division of CardiologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
- National Taiwan University College of MedicineGraduate Institute of Clinical MedicineTaipeiTaiwan
| | - Yuan‐Kun Aden Wu
- Department of Internal Medicine, Division of CardiologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Mao‐Yuan Su
- Department of Medical ImagingNational Taiwan University HospitalTaipeiTaiwan
- Department of Medical Imaging and Radiological TechnologyYuanpei University of Medical TechnologyHsinchuTaiwan
| | - Chia‐Hung Chou
- Department of Obstetrics and GynecologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Chia‐Tung Shun
- Department of Forensic Medicine and PathologyNational Taiwan University HospitalTaipeiTaiwan
| | - Hsueh‐Wen Hsueh
- Department of NeurologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Jimmy Jyh‐Ming Juang
- Department of Internal Medicine, Division of CardiologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Ming‐Jen Lee
- Department of NeurologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Ping‐Huei Tseng
- Department of Internal Medicine, Division of GastroenterologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Chia‐Hua Hsu
- Department of NeurologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Sung‐Tsang Hsieh
- Department of NeurologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Chi‐Lun Ko
- Department of Nuclear MedicineNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Mei‐Fang Cheng
- Department of Nuclear MedicineNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
- Institute of Environmental and Occupational Health SciencesNational Taiwan UniversityTaipeiTaiwan
| | - Chi‐Chao Chao
- Department of NeurologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
| | - Yen‐Hung Lin
- Department of Internal Medicine, Division of CardiologyNational Taiwan University Hospital and National Taiwan University College of MedicineTaipeiTaiwan
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7
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McGowan A, Gennemark P, Akieh-Pirkanniemi M, Wirman L, Davies N, Elebring M, Tivesten A, Strimfors M, Hölttä M, Söderberg M, Berntsson V, Balas D, Koskinen M, Leino L, Abrahmsén-Alami S. Injectable Biodegradable Silica Depot for Controlled Subcutaneous Delivery of Antisense Oligonucleotides with beyond Monthly Administration. Mol Pharm 2024; 21:143-151. [PMID: 38126776 DOI: 10.1021/acs.molpharmaceut.3c00663] [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] [Indexed: 12/23/2023]
Abstract
Single-stranded antisense oligonucleotides (ASOs) are typically administered subcutaneously once per week or monthly. Less frequent dosing would have strong potential to improve patient convenience and increase adherence and thereby for some diseases result in more optimal therapeutic outcomes. Several technologies are available to provide sustained drug release via subcutaneous (SC) administration. ASOs have a high aqueous solubility and require relatively high doses, which limits the options available substantially. In the present work, we show that an innovative biodegradable, nonporous silica-based matrix provides zero-order release in vivo (rats) for at least 4 weeks for compositions with ASO loads of up to about 100 mg/mL (0.5 mL injection) without any sign of initial burst. This implies that administration beyond once monthly can be feasible. For higher drug loads, substantial burst release was observed during the first week. The concentrations of unconjugated ASO levels in the liver were found to be comparable to corresponding bolus doses. Additionally, infusion using a minipump shows a higher liver exposure than SC bolus administration at the same dose level and, in addition, clear mRNA knockdown and circulating protein reduction comparable to SC bolus dosing, hence suggesting productive liver uptake for a slow-release administration.
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Affiliation(s)
- Asmaa McGowan
- DelSiTech Ltd., PharmaCity, Itäinen Pitkäkatu 4 B, 20520 Turku, Finland
| | - Peter Gennemark
- Drug Metabolism and Pharmacokinetics, Research and Early Development, Cardiovascular, Renal, and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Mölndal, Gothenburg SE-431 83, Sweden
- Department of Biomedical Engineering, Linköping University, Linköping 581 83, Sweden
| | | | - Linda Wirman
- DelSiTech Ltd., PharmaCity, Itäinen Pitkäkatu 4 B, 20520 Turku, Finland
| | - Nigel Davies
- Advanced Drug Delivery, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Gothenburg SE-431 83, Sweden
| | - Marie Elebring
- Drug Metabolism and Pharmacokinetics, Research and Early Development, Cardiovascular, Renal, and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Mölndal, Gothenburg SE-431 83, Sweden
| | - Anna Tivesten
- CVRM CMC Projects, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Gothenburg SE-431 83, Sweden
| | - Marie Strimfors
- Bioscience metabolism, Research and Early Development, Cardiovascular, Renal, and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Mölndal, Gothenburg SE-431 83, Sweden
| | - Mikko Hölttä
- Drug Metabolism and Pharmacokinetics, Research and Early Development, Cardiovascular, Renal, and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Mölndal, Gothenburg SE-431 83, Sweden
| | - Magnus Söderberg
- Pathology, Clinical Pharmacology and Safety Sciences, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Gothenburg SE-431 83, Sweden
| | - Veronica Berntsson
- Advanced Drug Delivery, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Gothenburg SE-431 83, Sweden
| | - Daniela Balas
- Advanced Drug Delivery, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Gothenburg SE-431 83, Sweden
| | - Mika Koskinen
- DelSiTech Ltd., PharmaCity, Itäinen Pitkäkatu 4 B, 20520 Turku, Finland
| | - Lasse Leino
- DelSiTech Ltd., PharmaCity, Itäinen Pitkäkatu 4 B, 20520 Turku, Finland
| | - Susanna Abrahmsén-Alami
- Sustainable Innovation & Transformational Excellence, Pharmaceutical Technology & Development, Operations, AstraZeneca, Mölndal, Gothenburg SE-431 83, Sweden
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8
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Gogate A, Belcourt J, Shah M, Wang AZ, Frankel A, Kolmel H, Chalon M, Stephen P, Kolli A, Tawfik SM, Jin J, Bahal R, Rasmussen TP, Manautou JE, Zhong XB. Targeting the Liver with Nucleic Acid Therapeutics for the Treatment of Systemic Diseases of Liver Origin. Pharmacol Rev 2023; 76:49-89. [PMID: 37696583 PMCID: PMC10753797 DOI: 10.1124/pharmrev.123.000815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 08/25/2023] [Accepted: 09/06/2023] [Indexed: 09/13/2023] Open
Abstract
Systemic diseases of liver origin (SDLO) are complex diseases in multiple organ systems, such as cardiovascular, musculoskeletal, endocrine, renal, respiratory, and sensory organ systems, caused by irregular liver metabolism and production of functional factors. Examples of such diseases discussed in this article include primary hyperoxaluria, familial hypercholesterolemia, acute hepatic porphyria, hereditary transthyretin amyloidosis, hemophilia, atherosclerotic cardiovascular diseases, α-1 antitrypsin deficiency-associated liver disease, and complement-mediated diseases. Nucleic acid therapeutics use nucleic acids and related compounds as therapeutic agents to alter gene expression for therapeutic purposes. The two most promising, fastest-growing classes of nucleic acid therapeutics are antisense oligonucleotides (ASOs) and small interfering RNAs (siRNAs). For each listed SDLO disease, this article discusses epidemiology, symptoms, genetic causes, current treatment options, and advantages and disadvantages of nucleic acid therapeutics by either ASO or siRNA drugs approved or under development. Furthermore, challenges and future perspectives on adverse drug reactions and toxicity of ASO and siRNA drugs for the treatment of SDLO diseases are also discussed. In summary, this review article will highlight the clinical advantages of nucleic acid therapeutics in targeting the liver for the treatment of SDLO diseases. SIGNIFICANCE STATEMENT: Systemic diseases of liver origin (SDLO) contain rare and common complex diseases caused by irregular functions of the liver. Nucleic acid therapeutics have shown promising clinical advantages to treat SDLO. This article aims to provide the most updated information on targeting the liver with antisense oligonucleotides and small interfering RNA drugs. The generated knowledge may stimulate further investigations in this growing field of new therapeutic entities for the treatment of SDLO, which currently have no or limited options for treatment.
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Affiliation(s)
- Anagha Gogate
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Jordyn Belcourt
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Milan Shah
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Alicia Zongxun Wang
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Alexis Frankel
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Holly Kolmel
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Matthew Chalon
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Prajith Stephen
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Aarush Kolli
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Sherouk M Tawfik
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Jing Jin
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Raman Bahal
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Theodore P Rasmussen
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - José E Manautou
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
| | - Xiao-Bo Zhong
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut
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9
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Golatkar V, Bhatt LK. Emerging therapeutic avenues in cardiac amyloidosis. Eur J Pharmacol 2023; 960:176142. [PMID: 37866746 DOI: 10.1016/j.ejphar.2023.176142] [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: 05/31/2023] [Revised: 10/15/2023] [Accepted: 10/19/2023] [Indexed: 10/24/2023]
Abstract
Cardiac Amyloidosis (CA) is a toxic infiltrative cardiomyopathy occurred by the deposition of the amyloid fibres in the extracellular matrix of the myocardium. This results in severe clinical complications such as increased left ventricular wall thickness and interventricular stiffness, a decrease in left ventricular stroke volume and cardiac output, diastolic dysfunction, arrhythmia, etc. In a prolonged period, this condition progresses into heart failure. The amyloid fibres affecting the heart include immunoglobulin light chain (AL - amyloidosis) and transthyretin protein (ATTR - amyloidosis) misfolded amyloid fibres. ATTRwt has the highest prevalence of 155 to 191 cases per million while ATTRv has an estimated prevalence of 5.2 cases per million. The pathological findings and therapeutic approaches developed recently have aided in the treatment regimen of cardiac amyloidosis patients. In recent years, understanding the pathophysiology of amyloid fibres formation and mechanistic pathways triggered in both types of cardiac amyloidosis has led to the development of new therapeutic approaches and agents. This review focuses on the current status of emerging therapeutic agents in clinical trials. Earlier, melphalan and bortezomib in combination with alkylating agents and immunomodulatory drugs were used as a standard therapy for AL amyloidosis. Tafamidis, approved recently by FDA is used as a standard for ATTR amyloidosis. However, the emerging therapeutic agents under development for the treatment of AL and ATTR cardiac amyloidosis have shown a potent and rapid effect with a safety profile.
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Affiliation(s)
- Vaishnavi Golatkar
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Vile Parle (W), Mumbai, India
| | - Lokesh Kumar Bhatt
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Vile Parle (W), Mumbai, India.
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10
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Ardiana M, Fadila AN, Zuhra Z, Kusuma NM, Surya Erlangga Rurus ME, Oceandy D. Non-coding RNA therapeutics in cardiovascular diseases and risk factors: Systematic review. Noncoding RNA Res 2023; 8:487-506. [PMID: 37483458 PMCID: PMC10362275 DOI: 10.1016/j.ncrna.2023.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/08/2023] [Accepted: 06/19/2023] [Indexed: 07/25/2023] Open
Abstract
At present, RNA-based therapy which includes therapies using non-coding RNAs (ncRNAs), antisense oligonucleotides (ASOs), and aptamers are gaining widespread attention as possible ways to target genes in various cardiovascular diseases (CVDs), thereby serving as a promising therapeutic approach for CVDs and risk factors management. However, data are primarily in an early stage. A systematic review was carried out using literature from several databases (Pubmed, Cochrane, Scopus, and DOAJR) following the PRISMA guidelines. Of the 64 articles reviewed, 39 papers were included in this review with three main types of RNAs: aptamers, antisense oligonucleotides (ASOs), and small-interfering RNA (siRNA). All studies were human clinical trials. RNA-based therapies were demonstrated to be efficacious in treating various CVDs and controlling cardiovascular risk factors. They are generally safe and well-tolerated. However, data are still in the early stage and warrant further investigation.
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Affiliation(s)
- Meity Ardiana
- Department of Cardiology and Vascular Medicine, Dr.Soetomo General Hospital, Surabaya, Indonesia
- Faculty of Medicine, Airlangga University, Surabaya, Indonesia
| | - Asiyah Nurul Fadila
- Department of Cardiology and Vascular Medicine, Dr.Soetomo General Hospital, Surabaya, Indonesia
- Faculty of Medicine, Airlangga University, Surabaya, Indonesia
| | - Zakirah Zuhra
- Department of Cardiology and Vascular Medicine, Dr.Soetomo General Hospital, Surabaya, Indonesia
- Faculty of Medicine, Airlangga University, Surabaya, Indonesia
| | | | | | - Delvac Oceandy
- Division of Cardiovascular Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
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Gao X, Diep JK, Norris DA, Yu RZ, Geary RS. Predicting the pharmacokinetics and pharmacodynamics of antisense oligonucleotides: an overview of various approaches and opportunities for PBPK/PD modelling. Expert Opin Drug Metab Toxicol 2023; 19:979-990. [PMID: 37970635 DOI: 10.1080/17425255.2023.2283524] [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: 07/24/2023] [Accepted: 11/08/2023] [Indexed: 11/17/2023]
Abstract
INTRODUCTION Advances in research and development (R&D) have enabled many approvals of antisense oligonucleotides (ASOs). Its administration expanded from systemic to local for treating various diseases, where predicting target tissue exposures and pharmacokinetics (PK) and pharmacodynamics (PD) in human can be critical. AREAS COVERED A literature search for PBPK/PD models of ASOs was conducted using PubMed and Embase (to 1 April 2023). ASO PK and PD in animals and humans and modeling approaches including physiologically based (PB) are summarized; and relevance and impacts of PBPK/PD modeling are assessed. EXPERT OPINION Allometric scaling and compartmental PK/PD modeling have been successful to predict human ASO PK/PD, addressing most R&D needs. Understanding tissue distribution of ASOs can be crucial for their efficacy and safety especially for intrathecal (IT), pulmonary, or other local routes. PBPK/PD modeling is expected to improve such understanding, for which, efforts have been sporadic. However, developing a PBPK/PD model requires careful review of known biology/pharmacology and thoughtful experimental designs. Resulting models have the potential to predict target/specified tissue exposures and responses in human adults and pediatrics. Ultimately, a PBPK/PD modeling approach can lead to more efficient and rational clinical development, resulting in well-informed decision making and a shortened timeline.
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Affiliation(s)
- Xiang Gao
- Preclinical Development, Ionis Pharmaceuticals, Inc, Carlsbad, CA, USA
| | - John K Diep
- Preclinical Development, Ionis Pharmaceuticals, Inc, Carlsbad, CA, USA
| | - Daniel A Norris
- Preclinical Development, Ionis Pharmaceuticals, Inc, Carlsbad, CA, USA
| | - Rosie Z Yu
- Preclinical Development, Ionis Pharmaceuticals, Inc, Carlsbad, CA, USA
| | - Richard S Geary
- Preclinical Development, Ionis Pharmaceuticals, Inc, Carlsbad, CA, USA
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Zhou J, Li Y, Geng J, Zhou H, Liu L, Peng X. Recent Progress in the Development and Clinical Application of New Drugs for Transthyretin Cardiac Amyloidosis. J Cardiovasc Pharmacol 2023; 82:427-437. [PMID: 37678276 PMCID: PMC10691666 DOI: 10.1097/fjc.0000000000001478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 08/26/2023] [Indexed: 09/09/2023]
Abstract
ABSTRACT Transthyretincardiac amyloidosis is a rare disease that has gained significant attention in recent years because of misfolding of transthyretin fibrils produced by the liver, leading to their deposition in the myocardium. The disease has an insidious onset, nonspecific clinical manifestations, and historically lacked effective drugs, making early diagnosis and treatment challenging. The survival time of patients largely depends on the extent of heart involvement at the time of diagnosis, and conventional treatments for cardiovascular disease do not provide significant benefits. Effective management of the disease requires treatment of its underlying cause. Orthotopic liver transplantation and combined hepato-heart transplantation have been clinically effective means of treating transthyretin cardiac amyloidosis mutants for many years. However, transplantation has many limitations in clinical practice. In recent years, the development of new drugs has brought new hope to patients. This review presents the latest advances in drug development and clinical application to provide a reference for clinicians managing transthyretin cardiac amyloidosis.
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Affiliation(s)
- Juan Zhou
- Department of Cardiology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei, China
- Department of Medical, Health Science Center, Yangtze University, Jingzhou, Hubei, China
| | - Yanfang Li
- Department of Gastroenterology, First Hospital Affiliated to Air Force Medical University, Xian, China
| | - Jing Geng
- Department of Medical, Health Science Center, Yangtze University, Jingzhou, Hubei, China
| | - Hong Zhou
- Department of Medical, Health Science Center, Yangtze University, Jingzhou, Hubei, China
| | - Lian Liu
- Department of Pharmacology, Health Science Center, Yangtze University, Jingzhou, Hubei, China
| | - Xiaochun Peng
- Laboratory of Oncology, Center for Molecular Medicine, School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou, China; and
- Department of Pathophysiology, School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou 434023 Hubei, China
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Adams D, Algalarrondo V, Echaniz-Laguna A. Hereditary transthyretin amyloidosis in the era of RNA interference, antisense oligonucleotide, and CRISPR-Cas9 treatments. Blood 2023; 142:1600-1612. [PMID: 37624911 DOI: 10.1182/blood.2023019884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 08/08/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023] Open
Abstract
Hereditary transthyretin amyloidosis (ATTRv) is a rare autosomal dominant adult-onset disorder caused by point mutations in the transthyretin (TTR) gene encoding TTR, also known as prealbumin. ATTRv survival ranges from 3 to 10 years, and peripheral nervous system and heart are usually the 2 main tissues affected, although central nervous system and eye may also be involved. Because the liver is the main TTR protein secretor organ, it has been the main target of treatments developed these last years, including liver transplantation, which has been shown to significantly increase survival in a subset of patients carrying the so-called "early-onset Val30Met" TTR gene mutation. More recently, treatments targeting hepatic TTR RNA have been developed. Hepatic TTR RNA targeting is performed using RNA interference (RNAi) and antisense oligonucleotide (ASO) technologies involving lipid nanoparticle carriers or N-acetylgalactosamine fragments. RNAi and ASO treatments induce an 80% decrease in TTR liver production for a period of 1 to 12 weeks. ASO and RNAi phase 3 trials in patients with TTR-related polyneuropathy have shown a positive impact on neuropathy clinical scores and quality of life end points, and delayed RNAi treatment negatively affects survival. Clinical trials specifically investigating RNAi therapy in TTR cardiomyopathy are underway. Hepatic RNA targeting has revolutionized ATTRv treatment and may allow for the transforming a fatal disease into a treatable disorder. Because retina and choroid plexus secrete limited quantities of TTR protein, both tissues are now seen as the next targets for fully controlling the disease.
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Affiliation(s)
- David Adams
- Neurology Department, Bicêtre Hospital, INSERM U 1195, CERAMIC, Assistance Publique-Hôpitaux de Paris, University of Paris Saclay, Paris, France
| | - Vincent Algalarrondo
- Cardiology Department, CERAMIC, Bichat Claude Bernard Hospital, University of Paris-Cité, Paris, France
| | - Andoni Echaniz-Laguna
- Neurology Department, Bicêtre Hospital, INSERM U 1195, CERAMIC, Assistance Publique-Hôpitaux de Paris, University of Paris Saclay, Paris, France
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Garcia-Pavia P, Aus dem Siepen F, Donal E, Lairez O, van der Meer P, Kristen AV, Mercuri MF, Michalon A, Frost RJA, Grimm J, Nitsch RM, Hock C, Kahr PC, Damy T. Phase 1 Trial of Antibody NI006 for Depletion of Cardiac Transthyretin Amyloid. N Engl J Med 2023; 389:239-250. [PMID: 37212440 DOI: 10.1056/nejmoa2303765] [Citation(s) in RCA: 48] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
BACKGROUND Transthyretin amyloid (ATTR) cardiomyopathy is a progressive and fatal disease caused by misfolded transthyretin. Despite advances in slowing disease progression, there is no available treatment that depletes ATTR from the heart for the amelioration of cardiac dysfunction. NI006 is a recombinant human anti-ATTR antibody that was developed for the removal of ATTR by phagocytic immune cells. METHODS In this phase 1, double-blind trial, we randomly assigned (in a 2:1 ratio) 40 patients with wild-type or variant ATTR cardiomyopathy and chronic heart failure to receive intravenous infusions of either NI006 or placebo every 4 weeks for 4 months. Patients were sequentially enrolled in six cohorts that received ascending doses (ranging from 0.3 to 60 mg per kilogram of body weight). After four infusions, patients were enrolled in an open-label extension phase in which they received eight infusions of NI006 with stepwise increases in the dose. The safety and pharmacokinetic profiles of NI006 were assessed, and cardiac imaging studies were performed. RESULTS The use of NI006 was associated with no apparent drug-related serious adverse events. The pharmacokinetic profile of NI006 was consistent with that of an IgG antibody, and no antidrug antibodies were detected. At doses of at least 10 mg per kilogram, cardiac tracer uptake on scintigraphy and extracellular volume on cardiac magnetic resonance imaging, both of which are imaging-based surrogate markers of cardiac amyloid load, appeared to be reduced over a period of 12 months. The median N-terminal pro-B-type natriuretic peptide and troponin T levels also seemed to be reduced. CONCLUSIONS In this phase 1 trial of the recombinant human antibody NI006 for the treatment of patients with ATTR cardiomyopathy and heart failure, the use of NI006 was associated with no apparent drug-related serious adverse events. (Funded by Neurimmune; NI006-101 ClinicalTrials.gov number, NCT04360434.).
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Affiliation(s)
- Pablo Garcia-Pavia
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Fabian Aus dem Siepen
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Erwan Donal
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Olivier Lairez
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Peter van der Meer
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Arnt V Kristen
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Michele F Mercuri
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Aubin Michalon
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Robert J A Frost
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Jan Grimm
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Roger M Nitsch
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Christoph Hock
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Peter C Kahr
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
| | - Thibaud Damy
- From Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, CIBERCV, and Centro Nacional de Investigaciones Cardiovasculares, Madrid, and Universidad Francisco de Vitoria, Pozuelo de Alarcón - all in Spain (P.G.-P.); the Department of Cardiology, University Hospital Heidelberg, Heidelberg (F.S.), and Cardiovascular Center Darmstadt, Darmstadt (A.V.K.) - both in Germany; the Department of Cardiology, University of Rennes, Centre Hospitalier Universitaire (CHU) de Rennes, INSERM, LTSI-UMR 1099, Rennes (E.D.), Service de Cardiologie, CHU de Toulouse-Hôpital Rangueil, Toulouse (O.L.), and the Cardiology Department and French National Reference Center for Cardiac Amyloidosis, Hôpitaux Universitaires Henri Mondor, Assistance Publique-Hôpitaux de Paris, and Institut Mondor de Recherche Biomédicale, INSERM, Université Paris Est Créteil, Créteil (T.D.) - all in France; the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands (P.M.); Alexion-AstraZeneca Rare Disease, Boston (M.F.M.); and Neurimmune (A.M., R.J.A.F., J.G., R.M.N., C.H., P.C.K.) and the Institute for Regenerative Medicine (R.M.N., C.H.) and the Center for Molecular Cardiology (P.C.K.), University of Zurich - all in Schlieren, Switzerland
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15
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Ioannou A, Fontana M, Gillmore JD. RNA Targeting and Gene Editing Strategies for Transthyretin Amyloidosis. BioDrugs 2023; 37:127-142. [PMID: 36795354 PMCID: PMC9933836 DOI: 10.1007/s40259-023-00577-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/10/2023] [Indexed: 02/17/2023]
Abstract
Transthyretin (TTR) is a tetrameric protein synthesized primarily by the liver. TTR can misfold into pathogenic ATTR amyloid fibrils that deposit in the nerves and heart, causing a progressive and debilitating polyneuropathy (PN) and life-threatening cardiomyopathy (CM). Therapeutic strategies, which are aimed at reducing ongoing ATTR amyloid fibrillogenesis, include stabilization of the circulating TTR tetramer or reduction of TTR synthesis. Small interfering RNA (siRNA) or antisense oligonucleotide (ASO) drugs are highly effective at disrupting the complementary mRNA and inhibiting TTR synthesis. Since their development, patisiran (siRNA), vutrisiran (siRNA) and inotersen (ASO) have all been licensed for treatment of ATTR-PN, and early data suggest these drugs may have efficacy in treating ATTR-CM. An ongoing phase 3 clinical trial will evaluate the efficacy of eplontersen (ASO) in the treatment of both ATTR-PN and ATTR-CM, and a recent phase 1 trial demonstrated the safety of novel in vivo CRISPR-Cas9 gene-editing therapy in patients with ATTR amyloidosis. Recent results from trials of gene silencer and gene-editing therapies suggest these novel therapeutic agents have the potential to substantially alter the landscape of treatment for ATTR amyloidosis. Their success has already changed the perception of ATTR amyloidosis from a universally progressive and fatal disease to one that is treatable through availability of highly specific and effective disease-modifying therapies. However, important questions remain including long-term safety of these drugs, potential for off-target gene editing, and how best to monitor the cardiac response to treatment.Kindly check and confirm the processed running title.This is correct.
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Affiliation(s)
- Adam Ioannou
- National Amyloidosis Centre, Royal Free Hospital, University College London, Royal Free Campus, Rowland Hill Street, London, NW3 2PF, UK
| | - Marianna Fontana
- National Amyloidosis Centre, Royal Free Hospital, University College London, Royal Free Campus, Rowland Hill Street, London, NW3 2PF, UK
| | - Julian D Gillmore
- National Amyloidosis Centre, Royal Free Hospital, University College London, Royal Free Campus, Rowland Hill Street, London, NW3 2PF, UK.
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16
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Chandra S, Sisodia SS, Vassar RJ. The gut microbiome in Alzheimer's disease: what we know and what remains to be explored. Mol Neurodegener 2023; 18:9. [PMID: 36721148 PMCID: PMC9889249 DOI: 10.1186/s13024-023-00595-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 01/06/2023] [Indexed: 02/02/2023] Open
Abstract
Alzheimer's disease (AD), the most common cause of dementia, results in a sustained decline in cognition. There are currently few effective disease modifying therapies for AD, but insights into the mechanisms that mediate the onset and progression of disease may lead to new, effective therapeutic strategies. Amyloid beta oligomers and plaques, tau aggregates, and neuroinflammation play a critical role in neurodegeneration and impact clinical AD progression. The upstream modulators of these pathological features have not been fully clarified, but recent evidence indicates that the gut microbiome (GMB) may have an influence on these features and therefore may influence AD progression in human patients. In this review, we summarize studies that have identified alterations in the GMB that correlate with pathophysiology in AD patients and AD mouse models. Additionally, we discuss findings with GMB manipulations in AD models and potential GMB-targeted therapeutics for AD. Lastly, we discuss diet, sleep, and exercise as potential modifiers of the relationship between the GMB and AD and conclude with future directions and recommendations for further studies of this topic.
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Affiliation(s)
- Sidhanth Chandra
- grid.16753.360000 0001 2299 3507Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611 USA ,grid.16753.360000 0001 2299 3507Medical Scientist Training Program, Northwestern University Feinberg School of Medicine, Chicago, IL 60611 USA
| | - Sangram S. Sisodia
- grid.170205.10000 0004 1936 7822Department of Neurobiology, University of Chicago, Chicago, IL 60637 USA
| | - Robert J. Vassar
- grid.16753.360000 0001 2299 3507Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611 USA
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17
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Oral Therapy for the Treatment of Transthyretin-Related Amyloid Cardiomyopathy. Int J Mol Sci 2022; 23:ijms232416145. [PMID: 36555787 PMCID: PMC9788438 DOI: 10.3390/ijms232416145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022] Open
Abstract
The care of systemic amyloidosis has improved dramatically due to improved awareness, accurate diagnostic tools, the development of powerful prognostic and companion biomarkers, and a continuous flow of innovative drugs, which translated into the blooming of phase 2/3 interventional studies for light chain (AL) and transthyretin (ATTR) amyloidosis. The unprecedented availability of effective drugs ignited great interest across various medical specialties, particularly among cardiologists who are now recognizing cardiac amyloidosis at an extraordinary pace. In all amyloidosis referral centers, we are observing a substantial increase in the prevalence of wild-type transthyretin (ATTRwt) cardiomyopathy, which is now becoming the most common form of cardiac amyloidosis. This review focuses on the oral drugs that have been recently introduced for the treatment of ATTR cardiac amyloidosis, for their ease of use in the clinic. They include both old repurposed drugs or fit-for-purpose designed compounds which bind and stabilize the TTR tetramer, thus reducing the formation of new amyloid fibrils, such as tafamidis, diflunisal, and acoramidis, as well as fibril disruptors which have the potential to promote the clearance of amyloid deposits, such as doxycycline. The development of novel therapies is based on the advances in the understanding of the molecular events underlying amyloid cardiomyopathy.
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18
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Characteristics of Patients with Hereditary Transthyretin Amyloidosis-Polyneuropathy (ATTRv-PN) in NEURO-TTRansform, an Open-label Phase 3 Study of Eplontersen. Neurol Ther 2022; 12:267-287. [PMID: 36525140 PMCID: PMC9837340 DOI: 10.1007/s40120-022-00414-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/17/2022] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION Hereditary transthyretin (ATTRv) amyloidosis is a rare, severe, progressive, debilitating, and ultimately fatal disease caused by systemic deposition of transthyretin (TTR) amyloid fibrils. ATTRv amyloidosis occurs in both males and females. Eplontersen (ION-682884), a ligand-conjugated antisense oligonucleotide designed to degrade hepatic TTR mRNA, is being evaluated for the treatment of ATTRv amyloidosis with polyneuropathy (ATTRv-PN) in the phase 3, international, multicenter, open-label NEURO-TTRansform study (NCT04136184). To describe the study population of this pivotal trial, here we report the baseline characteristics of patients enrolled in the NEURO-TTRansform study. METHODS Patients eligible for NEURO-TTRansform were 18-82 years old with a diagnosis of ATTRv-PN and Coutinho stage 1 (ambulatory without assistance) or stage 2 (ambulatory with assistance) disease; documented TTR gene variant; signs and symptoms consistent with neuropathy associated with ATTRv; no prior liver transplant; and New York Heart Association (NYHA) functional class I or II. RESULTS The NEURO-TTRansform study enrolled 168 patients across 15 countries/territories (North America, 15.5%; Europe, 38.1%; South America/Australia/Asia, 46.4%). At baseline, the study cohort had a mean age of 52.8 years, 69.0% of patients were male, and 78.0% of patients were White. The V30M variant was most prevalent (60.1% of patients), and prevalence varied by region. Overall, 56.5% and 17.3% of patients had received previous treatment with tafamidis or diflunisal, respectively. A majority of patients (79.2%) had Coutinho stage 1 disease (unimpaired ambulation) and early (before age 50) disease onset (53.0%). Time from diagnosis to enrollment was 46.6 (57.4) months (mean [standard deviation]). Most patients had a baseline polyneuropathy disability (PND) score of I (40.5%) or II (41.1%), and the mean modified Neuropathy Impairment Score + 7 (mNIS + 7) was 79.0. CONCLUSION The recruited population in the ongoing NEURO-TTRansform study has global representation characteristic of contemporary clinical practice. TRIAL REGISTRATION ClinicalTrials.gov identifier NCT04136184.
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Krychtiuk KA, Rader DJ, Granger CB. RNA-targeted therapeutics in cardiovascular disease: the time is now. EUROPEAN HEART JOURNAL. CARDIOVASCULAR PHARMACOTHERAPY 2022; 9:94-99. [PMID: 36138490 DOI: 10.1093/ehjcvp/pvac052] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 08/03/2022] [Accepted: 09/20/2022] [Indexed: 11/13/2022]
Abstract
Ribonucleic acid (RNA)-targeted therapeutics, including antisense oligonucleotide technologies as well as small interfering RNAs (siRNAs), represent a new class of medications that may overcome several of the disadvantages of small molecule drugs or monoclonal antibodies. Specifically, upstream targeting at the messenger RNA (mRNA) level renders any disease-related protein a potential target, even those pathways previously deemed 'undruggable'. Additional advantages include the comparably simple and cost-effective way of manufacturing and the long dosing intervals. A few agents are already approved and a wide array of cardiovascular drugs is in development, aimed at hypercholesterolaemia, hypertension, myocardial storage diseases, and the coagulation system. Here, we provide an update on the current status of RNA-targeted therapeutics in the cardiovascular arena.
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Affiliation(s)
- Konstantin A Krychtiuk
- Duke Clinical Research Institute, Duke University School of Medicine, Durham, NC 27701, USA
| | - Daniel J Rader
- Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA.,Department of Genetics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Christopher B Granger
- Duke Clinical Research Institute, Duke University School of Medicine, Durham, NC 27701, USA
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Overview of Current and Emerging Therapies for Amyloid Transthyretin Cardiomyopathy. Am J Cardiol 2022; 185 Suppl 1:S23-S34. [PMID: 36371281 DOI: 10.1016/j.amjcard.2022.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/03/2022] [Accepted: 10/06/2022] [Indexed: 11/11/2022]
Abstract
Recent efforts in basic science have elucidated the pathobiology of amyloid transthyretin (ATTR) amyloidosis, leading to the development of the first generation of transthyretin (TTR)-targeted therapies for this disease. Along with tafamidis, the first approved therapy for ATTR-cardiomyopathy (CM), several other agents are in late-stage clinical development for ATTR-CM. TTR-stabilizing and -silencing agents with various mechanisms target TTR, preventing disaggregation of tetrameric TTR, and subsequent misfolding of TTR and formation of amyloid fibrils in the myocardium. These agents, including the TTR-super-stabilizing agent acoramidis, TTR-silencing agents patisiran, vutrisiran, and eplontersen, and TTR gene silencing with clustered, regularly interspaced, short palindromic repeats and associated Cas9 endonuclease-based therapy NTLA-2001, are in varying stages of development. The nonsteroidal anti-inflammatory diflunisal has been shown to have TTR-stabilizing properties and may play a role off-label as treatment in selected patients, particularly allele carriers of TTR variants and patients unable to afford current therapies. Anti-amyloid treatments represent another strategy for treating patients with advanced ATTR amyloidosis. These agents are designed to bind to epitopes on amyloid fibril and extract amyloid by activation of macrophage-mediated phagocytosis addressing amyloid already deposited in organs and tissues. Since many patients with ATTR-CM present with advanced disease and the presence of significant amyloid burden in the heart, anti-amyloid therapy represents an important area of unmet treatment need. Various investigational anti-amyloid therapies are in early-stage clinical development.
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21
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Brannagan TH, Berk JL, Gillmore JD, Maurer MS, Waddington‐Cruz M, Fontana M, Masri A, Obici L, Brambatti M, Baker BF, Hannan LA, Buchele G, Viney NJ, Coelho T, Nativi‐Nicolau J. Liver-directed drugs for transthyretin-mediated amyloidosis. J Peripher Nerv Syst 2022; 27:228-237. [PMID: 36345805 PMCID: PMC10100204 DOI: 10.1111/jns.12519] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/28/2022] [Accepted: 10/30/2022] [Indexed: 11/11/2022]
Abstract
Transthyretin-mediated amyloidosis (ATTR) is a rare, under-recognized, progressively debilitating, fatal disease caused by the aggregation and extracellular deposition of amyloid transthyretin (TTR) fibrils in multiple organs and tissues throughout the body. TTR is predominantly synthesized by the liver and normally circulates as a homotetramer, while misfolded monomers aggregate to form amyloid fibrils. One strategy to treat ATTR amyloidosis is to reduce the amount of TTR produced by the liver using drugs that directly target the TTR mRNA or gene. This narrative review focuses on how TTR gene silencing tools act to reduce TTR production, describing strategies for improved targeted delivery of these agents to hepatocytes where TTR is preferentially expressed. Antisense oligonucleotides (ASOs) and small interfering RNAs (siRNAs), termed RNA silencers, cause selective degradation of TTR mRNA, while a TTR gene editing tool reduces TTR expression by introducing nonsense mutations into the TTR gene. Two strategies to facilitate tissue-specific delivery of these nucleic acid-based drugs employ endogenous receptors expressed by hepatocytes. Lipid nanoparticles (LNPs) that recruit apolipoprotein E support low-density lipoprotein receptor-mediated uptake of unconjugated siRNA and are now used for CRISPR gene editing tools. Additionally, conjugating N-acetylgalactosamine (GalNAc) moieties to ASOs or siRNAs facilitates receptor-mediated uptake by the asialoglycoprotein receptor. In summary, ATTR is a progressive disease with various clinical manifestations due to TTR aggregation, deposition, and amyloid formation. Receptor-targeted ligands (eg, GalNAc) and nanoparticle encapsulation (eg, LNPs) are technologies to deliver ASOs, siRNAs, and gene editing tools to hepatocytes, the primary location of TTR synthesis.
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Affiliation(s)
- Thomas H. Brannagan
- Peripheral Neuropathy CenterColumbia University, Vagelos College of Physicians and SurgeonsNew YorkNew YorkUSA
| | - John L. Berk
- Amyloidosis CenterBoston University School of MedicineBostonMassachusettsUSA
| | - Julian D. Gillmore
- National Amyloidosis CentreUniversity College London, Royal Free HospitalLondonUK
| | - Mathew S. Maurer
- Cardiac Amyloidosis Program, Division of CardiologyColumbia College of Physicians and SurgeonsNew YorkNew YorkUSA
| | - Márcia Waddington‐Cruz
- National Amyloidosis Referral Center‐CEPARMUniversity HospitalFederal University of Rio de JaneiroRio de JaneiroBrazil
| | - Marianna Fontana
- National Amyloidosis CentreUniversity College London, Royal Free HospitalLondonUK
| | - Ahmad Masri
- Cardiac Amyloidosis Program, Knight Cardiovascular InstituteOregon Health & Science UniversityPortlandOregonUSA
| | - Laura Obici
- Amyloidosis Research and Treatment CenterIRCCS Fondazione Policlinico San MatteoPaviaItaly
| | | | | | | | | | | | - Teresa Coelho
- Department of NeurosciencesCentro Hospitalar Universitário do PortoPortoPortugal
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Amanat M, Nemeth CL, Fine AS, Leung DG, Fatemi A. Antisense Oligonucleotide Therapy for the Nervous System: From Bench to Bedside with Emphasis on Pediatric Neurology. Pharmaceutics 2022; 14:2389. [PMID: 36365206 PMCID: PMC9695718 DOI: 10.3390/pharmaceutics14112389] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 10/26/2022] [Accepted: 11/02/2022] [Indexed: 09/05/2023] Open
Abstract
Antisense oligonucleotides (ASOs) are disease-modifying agents affecting protein-coding and noncoding ribonucleic acids. Depending on the chemical modification and the location of hybridization, ASOs are able to reduce the level of toxic proteins, increase the level of functional protein, or modify the structure of impaired protein to improve function. There are multiple challenges in delivering ASOs to their site of action. Chemical modifications in the phosphodiester bond, nucleotide sugar, and nucleobase can increase structural thermodynamic stability and prevent ASO degradation. Furthermore, different particles, including viral vectors, conjugated peptides, conjugated antibodies, and nanocarriers, may improve ASO delivery. To date, six ASOs have been approved by the US Food and Drug Administration (FDA) in three neurological disorders: spinal muscular atrophy, Duchenne muscular dystrophy, and polyneuropathy caused by hereditary transthyretin amyloidosis. Ongoing preclinical and clinical studies are assessing the safety and efficacy of ASOs in multiple genetic and acquired neurological conditions. The current review provides an update on underlying mechanisms, design, chemical modifications, and delivery of ASOs. The administration of FDA-approved ASOs in neurological disorders is described, and current evidence on the safety and efficacy of ASOs in other neurological conditions, including pediatric neurological disorders, is reviewed.
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Affiliation(s)
- Man Amanat
- Moser Center for Leukodystrophies, Kennedy Krieger Institute, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Christina L. Nemeth
- Moser Center for Leukodystrophies, Kennedy Krieger Institute, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Amena Smith Fine
- Moser Center for Leukodystrophies, Kennedy Krieger Institute, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Doris G. Leung
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Center for Genetic Muscle Disorders, Kennedy Krieger Institute, Baltimore, MD 21205, USA
| | - Ali Fatemi
- Moser Center for Leukodystrophies, Kennedy Krieger Institute, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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Cantone A, Sanguettoli F, Dal Passo B, Serenelli M, Rapezzi C. The treatment of amyloidosis is being refined. Eur Heart J Suppl 2022; 24:I131-I138. [PMID: 36380794 PMCID: PMC9653129 DOI: 10.1093/eurheartjsupp/suac104] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
The therapy of transthyretin (TTR)-related cardiac amyloidosis consists, on the one hand, of the prevention and management of complications (supportive therapy) and on the other of treatments aimed at interrupting or slowing down the production and deposition of fibrils (disease-modifying therapy). This definition includes drugs that act on different phases of amyloidogenesis: (i) silencing of the gene encoding TTR (small interfering RNA: patisiran, vutrisiran; antisense oligonucleotides: inotersen, eplontersen; new CRISPR Cas-9 drug technology for editing in vivo DNA); (ii) stabilization of circulating TTR to inhibit its dissociation and subsequent assembly of the resulting monomers in amyloidotic fibrils (tafamidis, acoramidis, and tolcapone); (iii) destruction and re-absorption of already formed amyloid tissue deposits. Drugs related to the latter strategy (antibodies) are still the subject of Phase 1 or 2 studies.
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Affiliation(s)
- Anna Cantone
- Cardiovascular Centre, University of Ferrara, Italy
| | | | | | | | - Claudio Rapezzi
- Cardiovascular Centre, University of Ferrara, Italy
- Maria Cecilia Hospital, GVM Care & Research, Cotignola, Ravenna, Italy
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Aimo A, Castiglione V, Rapezzi C, Franzini M, Panichella G, Vergaro G, Gillmore J, Fontana M, Passino C, Emdin M. RNA-targeting and gene editing therapies for transthyretin amyloidosis. Nat Rev Cardiol 2022; 19:655-667. [PMID: 35322226 DOI: 10.1038/s41569-022-00683-z] [Citation(s) in RCA: 65] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/21/2022] [Indexed: 12/19/2022]
Abstract
Transthyretin (TTR) is a tetrameric protein synthesized mostly by the liver and secreted into the plasma. TTR molecules can misfold and form amyloid fibrils in the heart and peripheral nerves, either as a result of gene variants in TTR or as an ageing-related phenomenon, which can lead to amyloid TTR (ATTR) amyloidosis. Some of the proposed strategies to treat ATTR amyloidosis include blocking TTR synthesis in the liver, stabilizing TTR tetramers or disrupting TTR fibrils. Small interfering RNA (siRNA) or antisense oligonucleotide (ASO) technologies have been shown to be highly effective for the blockade of TTR expression in the liver in humans. The siRNA patisiran and the ASO inotersen have been approved for the treatment of patients with ATTR variant polyneuropathy, regardless of the presence and severity of ATTR cardiomyopathy. Preliminary data show that therapy with patisiran improves the cardiac phenotype rather than only inducing disease stabilization in patients with ATTR variant polyneuropathy and concomitant ATTR cardiomyopathy, and this drug is being evaluated in a phase III clinical trial in patients with ATTR cardiomyopathy. Furthermore, ongoing phase III clinical trials will evaluate another siRNA, vutrisiran, and a novel ASO formulation, eplontersen, in patients with ATTR variant polyneuropathy or ATTR cardiomyopathy. In this Review, we discuss these approaches for TTR silencing in the treatment of ATTR amyloidosis as well as the latest strategy of genome editing with CRISPR-Cas9 to reduce TTR gene expression.
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Affiliation(s)
- Alberto Aimo
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy.
- Cardiology Division, Fondazione Toscana Gabriele Monasterio, Pisa, Italy.
| | | | - Claudio Rapezzi
- Cardiologic Centre, University of Ferrara, Ferrara, Italy
- Maria Cecilia Hospital, GVM Care & Research, Cotignola (Ravenna), Italy
| | - Maria Franzini
- Department of Translational Research and New Technologies in Medicine and Surgery, University Hospital of Pisa, Pisa, Italy
| | | | - Giuseppe Vergaro
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
- Cardiology Division, Fondazione Toscana Gabriele Monasterio, Pisa, Italy
| | - Julian Gillmore
- National Amyloidosis Centre, Division of Medicine, University College London, Royal Free Hospital, London, UK
| | - Marianna Fontana
- National Amyloidosis Centre, Division of Medicine, University College London, Royal Free Hospital, London, UK
| | - Claudio Passino
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
- Cardiology Division, Fondazione Toscana Gabriele Monasterio, Pisa, Italy
| | - Michele Emdin
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
- Cardiology Division, Fondazione Toscana Gabriele Monasterio, Pisa, Italy
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Vaillant A. Oligonucleotide-Based Therapies for Chronic HBV Infection: A Primer on Biochemistry, Mechanisms and Antiviral Effects. Viruses 2022; 14:v14092052. [PMID: 36146858 PMCID: PMC9502277 DOI: 10.3390/v14092052] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/08/2022] [Accepted: 09/08/2022] [Indexed: 11/21/2022] Open
Abstract
Three types of oligonucleotide-based medicines are under clinical development for the treatment of chronic HBV infection. Antisense oligonucleotides (ASOs) and synthetic interfering RNA (siRNA) are designed to degrade HBV mRNA, and nucleic acid polymers (NAPs) stop the assembly and secretion of HBV subviral particles. Extensive clinical development of ASOs and siRNA for a variety of liver diseases has established a solid understanding of their pharmacodynamics, accumulation in different tissue types in the liver, pharmacological effects, off-target effects and how chemical modifications and delivery approaches affect these parameters. These effects are highly conserved for all ASO and siRNA used in human studies to date. The clinical assessment of several ASO and siRNA compounds in chronic HBV infection in recent years is complicated by the different delivery approaches used. Moreover, these assessments have not considered the large clinical database of ASO/siRNA function in other liver diseases and known off target effects in other viral infections. The goal of this review is to summarize the current understanding of ASO/siRNA/NAP pharmacology and integrate these concepts into current clinical results for these compounds in the treatment of chronic HBV infection.
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Affiliation(s)
- Andrew Vaillant
- Replicor Inc., 6100 Royalmount Avenue, Montreal, QC H4P 2R2, Canada
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26
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Diep JK, Yu RZ, Viney NJ, Schneider E, Guo S, Henry S, Monia B, Geary R, Wang Y. Population Pharmacokinetic/Pharmacodynamic Modeling of Eplontersen, an Antisense Oligonucleotide in Development for Transthyretin Amyloidosis. Br J Clin Pharmacol 2022; 88:5389-5398. [DOI: 10.1111/bcp.15468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 05/21/2022] [Accepted: 07/19/2022] [Indexed: 11/30/2022] Open
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Carroll A, Dyck PJ, de Carvalho M, Kennerson M, Reilly MM, Kiernan MC, Vucic S. Novel approaches to diagnosis and management of hereditary transthyretin amyloidosis. J Neurol Neurosurg Psychiatry 2022; 93:668-678. [PMID: 35256455 PMCID: PMC9148983 DOI: 10.1136/jnnp-2021-327909] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 02/12/2022] [Indexed: 12/27/2022]
Abstract
Hereditary transthyretin amyloidosis (ATTRv) is a severe, adult-onset autosomal dominant inherited systemic disease predominantly affecting the peripheral and autonomic nervous system, heart, kidney and the eyes. ATTRv is caused by mutations of the transthyretin (TTR) gene, leading to extracellular deposition of amyloid fibrils in multiple organs including the peripheral nervous system. Typically, the neuropathy associated with ATTRv is characterised by a rapidly progressive and disabling sensorimotor axonal neuropathy with early small-fibre involvement. Carpal tunnel syndrome and cardiac dysfunction frequently coexist as part of the ATTRv phenotype. Although awareness of ATTRv polyneuropathy among neurologists has increased, the rate of misdiagnosis remains high, resulting in significant diagnostic delays and accrued disability. A timely and definitive diagnosis is important, given the emergence of effective therapies which have revolutionised the management of transthyretin amyloidosis. TTR protein stabilisers diflunisal and tafamidis can delay the progression of the disease, if treated early in the course. Additionally, TTR gene silencing medications, patisiran and inotersen, have resulted in up to 80% reduction in TTR production, leading to stabilisation or slight improvement of peripheral neuropathy and cardiac dysfunction, as well as improvement in quality of life and functional outcomes. The considerable therapeutic advances have raised additional challenges, including optimisation of diagnostic techniques and management approaches in ATTRv neuropathy. This review highlights the key advances in the diagnostic techniques, current and emerging management strategies, and biomarker development for disease progression in ATTRv.
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Affiliation(s)
- Antonia Carroll
- Brain and Mind Centre, Faculty of Medicine and Health, Translational Research Collective, University of Sydney and Department of Neurology, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - P James Dyck
- Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Mamede de Carvalho
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal.,Department of Neurosciences and Mental Health, Hospital de Santa Maria, Lisboa, Portugal
| | - Marina Kennerson
- Northcott Neuroscience Laboratory, ANZAC Research Institute, Molecular Medicine Laboratory Concord Repatriation General Hospital, and Concord Clinical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Mary M Reilly
- MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology and National Hospital for Neurology and Neurosurgery, London, UK
| | - Matthew C Kiernan
- Bushell Chair of Neurology, Brain and Mind Centre, University of Sydney, Sydney, New South Wales, Australia.,Neurology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
| | - Steve Vucic
- Brain and Nerve Research Center, Concord Clinical School, The University of Sydney, Sydney, New South Wales, Australia
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Vaillant A. Letter to the Editor: Is the HBsAg response to RO7062931 an antisense effect? Hepatology 2022; 75:230-231. [PMID: 34387887 DOI: 10.1002/hep.32103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 06/25/2021] [Indexed: 12/08/2022]
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Chandrashekar P, Desai AK, Trachtenberg BH. Targeted treatments of AL and ATTR amyloidosis. Heart Fail Rev 2021; 27:1587-1603. [PMID: 34783948 DOI: 10.1007/s10741-021-10180-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/12/2021] [Indexed: 12/22/2022]
Abstract
The therapeutic landscape for cardiac amyloidosis is rapidly evolving. In the last decade, our focus has shifted from dealing with the inevitable complications of continued extracellular infiltration of amyloid fibrils to earlier identification of these patients with prompt initiation of targeted therapy to prevent further deposition. Although much of the focus on novel targeted therapies is within the realm of transthyretin amyloidosis, light chain amyloidosis has benefited due to an overlap particularly in the final common pathway of fibrillogenesis and extraction of amyloid fibrils from the heart. Here, we review the targeted therapeutics for transthyretin and light chain amyloidosis. For transthyretin amyloidosis, the list of current and future therapeutics continues to evolve; and therefore, it is crucial to become familiar with the underlying mechanistic pathways of the disease. Although targeted therapeutic choices in AL amyloidosis are largely driven by the hematology team, the cardiac adverse effect profiles of these therapies, particularly in those with advanced amyloidosis, provide an opportunity for early recognition to prevent decompensation and can help inform recommendations regarding therapy changes when required.
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Affiliation(s)
- Pranav Chandrashekar
- Amyloidosis Center, Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA
| | - Anish K Desai
- Department of Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Barry H Trachtenberg
- Methodist DeBakey Heart and Vascular Center, Houston, TX, USA. .,Cardio-Oncology and Cardiac Amyloidosis Program, Advanced Heart Failure Fellowship Program, Methodist DeBakey Heart and Vascular Centers, J.C. Walter Transplant Center, Houston, USA.
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Griffin JM, Rosenthal JL, Grodin JL, Maurer MS, Grogan M, Cheng RK. ATTR Amyloidosis: Current and Emerging Management Strategies: JACC: CardioOncology State-of-the-Art Review. JACC: CARDIOONCOLOGY 2021; 3:488-505. [PMID: 34729521 PMCID: PMC8543085 DOI: 10.1016/j.jaccao.2021.06.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 06/02/2021] [Accepted: 06/04/2021] [Indexed: 12/15/2022]
Abstract
Transthyretin cardiac amyloidosis (ATTR-CA) is increasingly diagnosed owing to the emergence of noninvasive imaging and improved awareness. Clinical penetrance of pathogenic alleles is not complete and therefore there is a large cohort of asymptomatic transthyretin variant carriers. Screening strategies, monitoring, and treatment of subclinical ATTR-CA requires further study. Perhaps the most important translational triumph has been the development of effective therapies that have emerged from a biological understanding of ATTR-CA pathophysiology. These include recently proven strategies of transthyretin protein stabilization and silencing of transthyretin production. Data on neurohormonal blockade in ATTR-CA are limited, with the primary focus of medical therapy on judicious fluid management. Atrial fibrillation is common and requires anticoagulation owing to the propensity for thrombus formation. Although conduction disease and ventricular arrhythmias frequently occur, little is known regarding optimal management. Finally, aortic stenosis and ATTR-CA frequently coexist, and transcatheter valve replacement is the preferred treatment approach.
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Key Words
- 6MWT, 6-minute walk test
- AF, atrial fibrillation
- AL, light chain amyloid
- AS, aortic stenosis
- ASO, antisense oligonucleotide
- ATTR-CA, transthyretin cardiac amyloidosis
- ATTRv, variant transthyretin cardiac amyloidosis
- ATTRwt, wild-type transthyretin cardiac amyloidosis
- CMR, cardiac magnetic resonance
- DCCV, direct current cardioversion
- HF, heart failure
- LVEF, left ventricular ejection fraction
- NT-proBNP, N-terminal pro–B-type natriuretic peptide
- SAP, serum amyloid P component
- TAVR, transcatheter aortic valve replacement
- amyloidosis
- cardiomyopathy
- heart failure
- siRNA, small interfering RNA
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Affiliation(s)
- Jan M Griffin
- Columbia University Irving Medical Center, New York, New York, USA
| | | | - Justin L Grodin
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Mathew S Maurer
- Columbia University Irving Medical Center, New York, New York, USA
| | | | - Richard K Cheng
- University of Washington Medical Center, Seattle, Washington, USA
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Obici L, Mussinelli R. Current and Emerging Therapies for Hereditary Transthyretin Amyloidosis: Strides Towards a Brighter Future. Neurotherapeutics 2021; 18:2286-2302. [PMID: 34850359 PMCID: PMC8804119 DOI: 10.1007/s13311-021-01154-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/29/2021] [Indexed: 12/19/2022] Open
Abstract
The past few years have witnessed an unprecedented acceleration in the clinical development of novel therapeutic options for hereditary transthyretin amyloidosis. Recently approved agents and drugs currently under investigation not only represent a major breakthrough in this field but also provide validation of the therapeutic potential of innovative approaches, like RNA interference and CRISPR-Cas9-mediated gene editing, in rare inherited disorders. In this review, we describe the evolving therapeutic landscape for hereditary transthyretin amyloidosis and discuss how this highly disabling and fatal condition is turning into a treatable disease. We also provide an overview of the molecular mechanisms involved in transthyretin (TTR) amyloid formation and regression, to highlight how a deeper understanding of these processes has contributed to the identification of novel treatment targets. Finally, we focus on major areas of uncertainty and unmet needs that deserve further efforts to improve long-term patients' outcomes and allow for a brighter future.
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Affiliation(s)
- Laura Obici
- Amyloidosis Research and Treatment Centre, IRCCS Fondazione Policlinico San Matteo, Viale Golgi, 19, 27100, Pavia, Italy.
| | - Roberta Mussinelli
- Amyloidosis Research and Treatment Centre, IRCCS Fondazione Policlinico San Matteo, Viale Golgi, 19, 27100, Pavia, Italy
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Koike H, Iguchi Y, Sahashi K, Katsuno M. Significance of Oligomeric and Fibrillar Species in Amyloidosis: Insights into Pathophysiology and Treatment. Molecules 2021; 26:molecules26165091. [PMID: 34443678 PMCID: PMC8401015 DOI: 10.3390/molecules26165091] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/17/2021] [Accepted: 08/20/2021] [Indexed: 12/13/2022] Open
Abstract
Amyloidosis is a term referring to a group of various protein-misfolding diseases wherein normally soluble proteins form aggregates as insoluble amyloid fibrils. How, or whether, amyloid fibrils contribute to tissue damage in amyloidosis has been the topic of debate. In vitro studies have demonstrated the appearance of small globular oligomeric species during the incubation of amyloid beta peptide (Aβ). Nerve biopsy specimens from patients with systemic amyloidosis have suggested that globular structures similar to Aβ oligomers were generated from amorphous electron-dense materials and later developed into mature amyloid fibrils. Schwann cells adjacent to amyloid fibrils become atrophic and degenerative, suggesting that the direct tissue damage induced by amyloid fibrils plays an important role in systemic amyloidosis. In contrast, there is increasing evidence that oligomers, rather than amyloid fibrils, are responsible for cell death in neurodegenerative diseases, particularly Alzheimer’s disease. Disease-modifying therapies based on the pathophysiology of amyloidosis have now become available. Aducanumab, a human monoclonal antibody against the aggregated form of Aβ, was recently approved for Alzheimer’s disease, and other monoclonal antibodies, including gantenerumab, solanezumab, and lecanemab, could also be up for approval. As many other agents for amyloidosis will be developed in the future, studies to develop sensitive clinical scales for identifying improvement and markers that can act as surrogates for clinical scales should be conducted.
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Affiliation(s)
- Mathew S Maurer
- From the Clinical Cardiovascular Research Laboratory for the Elderly, Columbia University Irving Medical Center, New York Presbyterian Hospital, New York
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Disease Modifying Treatments for Transthyretin Amyloidosis. J Cardiovasc Pharmacol 2021; 78:e641-e647. [PMID: 34321398 DOI: 10.1097/fjc.0000000000001115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 07/01/2021] [Indexed: 11/26/2022]
Abstract
ABSTRACT The transthyretin (TTR) amyloidoses result from misfolding of the protein leading to fibril formation and aggregation as amyloid deposits in predominantly the cardiovascular and nervous systems. Cardiac involvement can manifest as heart failure, arrhythmias, and valvular disease. Neurologic involvement can cause sensorimotor polyneuropathies, mononeuropathies, and dysautonomia. Previously, treatment has focused on management of these symptoms and disease sequelae, with a high rate of mortality due to the absence of disease modifying therapies. In this manuscript, we review novel treatments focusing on three mechanistic pathways: (1) silencing of the TTR gene to suppress production, (2) stabilizing of TTR tetramers to prevent misfolding, or (3) disrupting of existing TTR amyloid fibrils to promote reabsorption.
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35
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Partridge W, Xia S, Kwoh TJ, Bhanot S, Geary RS, Baker BF. Improvements in the Tolerability Profile of 2'- O-Methoxyethyl Chimeric Antisense Oligonucleotides in Parallel with Advances in Design, Screening, and Other Methods. Nucleic Acid Ther 2021; 31:417-426. [PMID: 34242101 PMCID: PMC8713270 DOI: 10.1089/nat.2020.0917] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The development process of antisense oligonucleotides (ASOs) as therapeutic agents in humans has advanced through the implementation of chemical compound modifications as well as increasingly sophisticated toxicological preclinical screening techniques. The Ionis Integrated Safety Database was utilized to determine if advances in ASO screening and clinical lead identification methods have improved the tolerability profiles of 2′-O-methoxyethyl (2′MOE)-modified ASOs as a class, relative to the first 2′MOE ASO approved for use in humans, mipomersen. Tolerability was assessed by the incidence and percentage of subcutaneous doses leading to adverse events at the injection site or flu-like reactions (FLRs), as well as by the incidence of dose discontinuations due to these events. In randomized placebo-controlled phase 1 and phase 2 trials, the incidence of each measure of tolerability was lower in the test group of 12 ASOs (713 ASO-treated subjects) compared with the reference, mipomersen (266 ASO-treated subjects); with the most marked reduction in the incidence of FLRs (0.6% vs. 9.4%). A similar reduction in the incidence of dose discontinuation due to FLRs was also observed (0.2% vs. 0.9%). When compared with mipomersen, 8 of 12 ASOs showed significant improvements in their respective mean percentage of doses leading to adverse events at the injection site, whereas 7 ASOs showed a significant improvement in mean percentage of doses leading to FLRs. These results support an overall improvement in the tolerability profile in 2′MOE ASOs that entered development after mipomersen, in parallel with advances in the drug discovery screening process as well as the gains in clinical experience during development of each ASO.
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Affiliation(s)
| | - Shuting Xia
- Ionis Pharmaceuticals, Inc., Carlsbad, California, USA
| | - T Jesse Kwoh
- Ionis Pharmaceuticals, Inc., Carlsbad, California, USA
| | - Sanjay Bhanot
- Ionis Pharmaceuticals, Inc., Carlsbad, California, USA
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36
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Koike H, Okumura T, Murohara T, Katsuno M. Multidisciplinary Approaches for Transthyretin Amyloidosis. Cardiol Ther 2021; 10:289-311. [PMID: 34089151 PMCID: PMC8177037 DOI: 10.1007/s40119-021-00222-w] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Indexed: 12/12/2022] Open
Abstract
Amyloidosis caused by systemic deposition of transthyretin (TTR) is called ATTR amyloidosis and mainly includes hereditary ATTR (ATTRv) amyloidosis and wild-type ATTR (ATTRwt) amyloidosis. Until recently, ATTRv amyloidosis had been considered a disease in the field of neurology because neuropathic symptoms predominated in patients described in early reports, whereas advances in diagnostic techniques and increased recognition of this disease revealed the presence of patients with cardiomyopathy as a predominant feature. In contrast, ATTRwt amyloidosis has been considered a disease in the field of cardiology. However, recent studies have suggested that some of the patients with ATTRwt amyloidosis present tenosynovial tissue complications, particularly carpal tunnel syndrome, as an initial manifestation of amyloidosis, necessitating an awareness of this disease among neurologists and orthopedists. Although histopathological confirmation of amyloid deposits has traditionally been considered mandatory for the diagnosis of ATTR amyloidosis, the development of noninvasive imaging techniques in the field of cardiology, such as echocardiography, magnetic resonance imaging, and nuclear imaging, enabled nonbiopsy diagnosis of this disease. The mechanisms underlying characteristic cardiac imaging findings have been deciphered by histopathological studies. Novel disease-modifying therapies for ATTR amyloidosis, such as TTR stabilizers, short interfering RNA, and antisense oligonucleotides, were initially approved for ATTRv amyloidosis patients with polyneuropathy. However, the indications for the use of these disease-modifying therapies gradually widened to include ATTRv and ATTRwt amyloidosis patients with cardiomyopathy. Since the coronavirus disease 2019 (COVID-19) pandemic, which is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, occurred, the minimization of hospital visits and telemedicine have become increasingly important. As older age and cardiovascular disease are major factors associated with increased disease severity and mortality of COVID-19, many ATTR amyloidosis patients are at increased risk of disease aggravation when they are infected with SARS-CoV-2. From this viewpoint, close interspecialty communication to determine the optimal interval of evaluation is needed for the management of patients with ATTR amyloidosis.
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Affiliation(s)
- Haruki Koike
- Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Takahiro Okumura
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Masahisa Katsuno
- Department of Neurology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Markussen KH, Macedo JKA, Machío M, Dolce A, Goldberg YP, Vander Kooi CW, Gentry MS. The 6th International Lafora Epilepsy Workshop: Advances in the search for a cure. Epilepsy Behav 2021; 119:107975. [PMID: 33946009 PMCID: PMC8154720 DOI: 10.1016/j.yebeh.2021.107975] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 10/21/2022]
Abstract
Lafora disease (LD) is a fatal childhood dementia with severe epilepsy and also a glycogen storage disease that is caused by recessive mutations in either the EPM2A or EPM2B genes. Aberrant, cytoplasmic carbohydrate aggregates called Lafora bodies (LBs) are both a hallmark and driver of the disease. The 6th International Lafora Epilepsy Workshop was held online due to the pandemic. Nearly 300 clinicians, academic and industry scientists, trainees, NIH representatives, and LD friends and family members participated in the event. Speakers covered aspects of LD including progress towards the clinic, the importance of establishing clinical progression, translational progress with repurposed drugs and additional pre-clinical therapies, and novel discoveries that define foundational LD mechanisms.
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Affiliation(s)
- Kia H. Markussen
- Department of Molecular and Cellular Biochemistry, Epilepsy and Brain Metabolism Alliance, and Epilepsy Research Center, University of Kentucky College of Medicine, Lexington, Kentucky 40536, USA
| | - Jessica K. A. Macedo
- Department of Molecular and Cellular Biochemistry, Epilepsy and Brain Metabolism Alliance, and Epilepsy Research Center, University of Kentucky College of Medicine, Lexington, Kentucky 40536, USA,Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA
| | - María Machío
- Fundación Jimenez Diaz Hospital, UAM, 28045 Madrid, Spain
| | - Alison Dolce
- Division of Neurology, Department of Pediatrics, University of Texas-Southwestern, Dallas, Texas 75390, USA
| | - Y. Paul Goldberg
- Department of Clinical Development, Ionis Pharmaceuticals, Carlsbad, CA, 92008 USA
| | - Craig W. Vander Kooi
- Department of Molecular and Cellular Biochemistry, Epilepsy and Brain Metabolism Alliance, and Epilepsy Research Center, University of Kentucky College of Medicine, Lexington, Kentucky 40536, USA,Lafora Epilepsy Cure Initiative (LECI), USA
| | - Matthew S. Gentry
- Department of Molecular and Cellular Biochemistry, Epilepsy and Brain Metabolism Alliance, and Epilepsy Research Center, University of Kentucky College of Medicine, Lexington, Kentucky 40536, USA,Lafora Epilepsy Cure Initiative (LECI), USA
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Abstract
Often considered a rare disease, cardiac amyloidosis is increasingly recognized by practicing clinicians. The increased rate of diagnosis is in part due the aging of the population and increasing incidence and prevalence of cardiac amyloidosis with advancing age, as well as the advent of noninvasive methods using nuclear scintigraphy to diagnose transthyretin cardiac amyloidosis due to either variant or wild type transthyretin without a biopsy. Perhaps the most important driver of the increased awareness is the elucidation of the biologic mechanisms underlying the pathogenesis of cardiac amyloidosis which have led to the development of several effective therapies with differing mechanisms of actions. In this review, the mechanisms underlying the pathogenesis of cardiac amyloidosis due to light chain (AL) or transthyretin (ATTR) amyloidosis are delineated as well as the rapidly evolving therapeutic landscape that has emerged from a better pathophysiologic understanding of disease development.
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Affiliation(s)
- Jan M. Griffin
- Division of Cardiology, Cardiovascular Research Laboratory
for the Elderly, Columbia University Irving Medical Center, New York, NY
| | - Hannah Rosenblum
- Division of Cardiology, Cardiovascular Research Laboratory
for the Elderly, Columbia University Irving Medical Center, New York, NY
| | - Mathew S. Maurer
- Division of Cardiology, Cardiovascular Research Laboratory
for the Elderly, Columbia University Irving Medical Center, New York, NY
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Morgan ES, Tami Y, Hu K, Brambatti M, Mullick AE, Geary RS, Bakris GL, Tsimikas S. Antisense Inhibition of Angiotensinogen With IONIS-AGT-L Rx: Results of Phase 1 and Phase 2 Studies. ACTA ACUST UNITED AC 2021; 6:485-496. [PMID: 34222719 PMCID: PMC8246029 DOI: 10.1016/j.jacbts.2021.04.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 04/28/2021] [Accepted: 04/28/2021] [Indexed: 01/04/2023]
Abstract
Targeting angiotensinogen (AGT) may provide a novel approach to more optimally inhibit the renin-angiotensin-aldosterone system pathway. Double-blind, placebo-controlled clinical trials were performed in subjects with hypertension as monotherapy or as an add-on to angiotensin-converting enzyme inhibitors/angiotensin receptor blockers with IONIS-AGT-LRx versus placebo up to 2 months. IONIS-AGT-LRx was well tolerated with no significant changes in platelet count, potassium levels, or liver and renal function. IONIS-AGT-LRx significantly reduced AGT levels compared with placebo in all 3 studies. Although not powered for this endpoint, trends were noted in blood pressure reduction. In conclusion, IONIS-AGT-LRx significantly reduces AGT with a favorable safety, tolerability, and on-target profile. (A Study to Assess the Safety, Tolerability and Efficacy of IONIS-AGT-LRx; NCT04083222; A Study to Assess the Safety, Tolerability and Efficacy of IONIS-AGT-LRx, an Antisense Inhibitor Administered Subcutaneously to Hypertensive Subjects With Controlled Blood Pressure; NCT03714776; Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Ionis AGT-LRx in Healthy Volunteers; NCT03101878).
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Key Words
- ACEi/ARB, angiotensin-converting enzyme inhibitor/angiotensin receptor blocker
- AGT, angiotensinogen
- ASO, antisense oligonucleotide
- CI, confidence interval
- DBP, diastolic blood pressure
- EDTA, ethylenediaminetetraacetic acid
- GalNAc3, triantennary N-acetyl galactosamine
- K+, potassium
- PS, phosphorothioate
- RAAS
- RAAS, renin-angiotensin-aldosterone system
- SBP, systolic blood pressure
- angiotensinogen
- antisense
- hepatocyte
- hypertension
- oligonucleotide
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Affiliation(s)
| | - Yvonne Tami
- Ionis Pharmaceuticals, Carlsbad, California, USA
| | - Kuolung Hu
- Ionis Pharmaceuticals, Carlsbad, California, USA
| | | | | | | | - George L Bakris
- Department of Medicine, University of Chicago Medicine, Chicago, Illinois, USA
| | - Sotirios Tsimikas
- Ionis Pharmaceuticals, Carlsbad, California, USA.,Division of Cardiovascular Medicine, Department of Medicine, University of California, San Diego, California, USA
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Benbrahim M, Norman K, Sanchorawala V, Siddiqi OK, Hughes D. A Review of Novel Agents and Clinical Considerations in Patients With ATTR Cardiac Amyloidosis. J Cardiovasc Pharmacol 2021; 77:544-548. [PMID: 33657048 DOI: 10.1097/fjc.0000000000001004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 02/04/2021] [Indexed: 11/26/2022]
Abstract
ABSTRACT Transthyretin (ATTR) amyloidosis is a multisystem disease caused by organ deposition of amyloid fibrils derived from the misfolded transthyretin (TTR) protein. The purpose of this article is to provide an overview of current treatment regimens and summarize important considerations for each agent. A literature search was performed with the PubMed database for articles published through October 2020. Search criteria included therapies available on the market and investigational therapies used for ATTR amyloidosis treatment. Both prospective clinical trials and retrospective studies have been included in this review. Available therapies discussed in this review article are tafamidis, diflunisal, patisiran, and inotersen. Tafamidis is FDA approved for treatment of wild-type ATTR (ATTRwt) and hereditary ATTR (ATTRv) cardiomyopathy, and patisiran and inotersen are FDA approved for ATTRv polyneuropathy. Diflunisal does not have an FDA-labeled indication for amyloidosis but has been studied in ATTRv polyneuropathy and ATTRwt cardiomyopathy. Investigational therapies include a TTR stabilizer, AG10; 2 antifibril agents, PRX004 and doxycycline/tauroursodeoxycholic acid; and 2 gene silencers, vutrisiran and AKCEA-TTR-LRx; and clinical trials are ongoing. ATTR amyloidosis treatment selection is based on subtype and presence of cardiac or neurological manifestations. Additional considerations such as side effects, monitoring, and administration are outlined in this review.
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Affiliation(s)
| | - Kelsey Norman
- Department of Pharmacy, Boston Medical Center, Boston, MA
| | - Vaishali Sanchorawala
- Amyloidosis Center, Boston University School of Medicine and Boston Medical Center, Boston, MA; and
| | - Omar K Siddiqi
- Amyloidosis Center, Boston University School of Medicine and Boston Medical Center, Boston, MA; and
- Section of Cardiovascular Medicine, Boston University School of Medicine and Boston Medical Center, Boston, MA
| | - David Hughes
- Department of Pharmacy, Boston Medical Center, Boston, MA
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Antisense technology: an overview and prospectus. Nat Rev Drug Discov 2021; 20:427-453. [PMID: 33762737 DOI: 10.1038/s41573-021-00162-z] [Citation(s) in RCA: 274] [Impact Index Per Article: 91.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/08/2021] [Indexed: 12/13/2022]
Abstract
Antisense technology is now beginning to deliver on its promise to treat diseases by targeting RNA. Nine single-stranded antisense oligonucleotide (ASO) drugs representing four chemical classes, two mechanisms of action and four routes of administration have been approved for commercial use, including the first RNA-targeted drug to be a major commercial success, nusinersen. Although all the approved drugs are for use in patients with rare diseases, many of the ASOs in late- and middle-stage clinical development are intended to treat patients with very common diseases. ASOs in development are showing substantial improvements in potency and performance based on advances in medicinal chemistry, understanding of molecular mechanisms and targeted delivery. Moreover, the ASOs in development include additional mechanisms of action and routes of administration such as aerosol and oral formulations. Here, we describe the key technological advances that have enabled this progress and discuss recent clinical trials that illustrate the impact of these advances on the performance of ASOs in a wide range of therapeutic applications. We also consider strategic issues such as target selection and provide perspectives on the future of the field.
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Design and Rationale of the Global Phase 3 NEURO-TTRansform Study of Antisense Oligonucleotide AKCEA-TTR-L Rx (ION-682884-CS3) in Hereditary Transthyretin-Mediated Amyloid Polyneuropathy. Neurol Ther 2021; 10:375-389. [PMID: 33638113 PMCID: PMC8140170 DOI: 10.1007/s40120-021-00235-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 02/02/2021] [Indexed: 02/08/2023] Open
Abstract
Introduction AKCEA-TTR-LRx is a ligand-conjugated antisense (LICA) drug in development for the treatment of hereditary transthyretin amyloidosis (hATTR), a fatal disease caused by mutations in the transthyretin (TTR) gene. AKCEA-TTR-LRx shares the same nucleotide sequence as inotersen, an antisense medicine approved for use in hATTR polyneuropathy (hATTR-PN). Unlike inotersen, AKCEA-TTR-LRx is conjugated to a triantennary N-acetylgalactosamine moiety that supports receptor-mediated uptake by hepatocytes, the primary source of circulating TTR. This advanced design increases drug potency to allow for lower and less frequent dosing. The NEURO-TTRansform study will investigate whether AKCEA-TTR-LRx is safe and efficacious, with the aim of improving neurologic function and quality of life in hATTR-PN patients. Methods/Design Approximately 140 adults with stage 1 (independent ambulation) or 2 (requires ambulatory support) hATTR-PN are anticipated to enroll in this multicenter, open-label, randomized, phase 3 study. Patients will be assigned 6:1 to AKCEA-TTR-LRx 45 mg subcutaneously every 4 weeks or inotersen 300 mg once weekly until the prespecified week 35 interim efficacy analysis, after which patients receiving inotersen will receive AKCEA-TTR-LRx 45 mg subcutaneously every 4 weeks. All patients will then receive AKCEA-TTR-LRx through the remainder of the study treatment period. The final efficacy analysis at week 66 will compare the AKCEA-TTR-LRx arm with the historical placebo arm from the phase 3 trial of inotersen (NEURO-TTR). The primary outcome measures are between-group differences in the change from baseline in serum TTR, modified Neuropathy Impairment Score + 7, and Norfolk Quality of Life—Diabetic Neuropathy questionnaire. Conclusion NEURO-TTRansform is designed to determine whether targeted delivery of AKCEA-TTR-LRx to hepatocytes with lower and less frequent doses will translate into clinical and quality-of-life benefits for patients with hATTR-PN. Trial Registration The study is registered at ClinicalTrials.gov (NCT04136184) and EudraCT (2019-001698-10). Supplementary Information The online version contains supplementary material available at 10.1007/s40120-021-00235-6. Hereditary transthyretin amyloidosis with peripheral neuropathy (hATTR-PN for short) is a rare inherited condition.In hATTR-PN, a protein called transthyretin (TTR for short) builds up and damages nerves throughout the body. This neuropathy causes symptoms such as weakness, loss of sensation, and pain.
Currently available medicines can slow disease progression, but researchers are looking for more effective treatments with fewer side effects. AKCEA-TTR-LRx is an investigational treatment for hATTR-PN.AKCEA-TTR-LRx prevents the liver from making TTR, reducing the amount that causes disease progression. It is similar to an existing treatment called inotersen, but designed for better delivery to the liver and is more potent.
This article describes the NEURO-TTRansform study that will evaluate how effective AKCEA-TTR-LRx is for treating hATTR-PN.Around 140 adults with hATTR-PN from the USA, Canada, and Europe will be able to take part in this study. The study treatment period will be 85 weeks long. People will receive injections underneath the skin of either:AKCEA-TTR-LRx every 4 weeks, or Inotersen once a week for 35 weeks, followed by a switch to AKCEA-TTR-LRx every 4 weeks.
People may continue to receive AKCEA-TTR-LRx after the study treatment period ends.
In this study, researchers will compare results from people who received AKCEA-TTR-LRx to results from people who received no active ingredients (called placebo) in a similar study (called NEURO-TTR). Researchers will measure the differences in peoples’:Neuropathy symptoms. Quality of life. TTR protein levels in the blood.
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