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Almeida ZL, Vaz DC, Brito RMM. Transthyretin mutagenesis: impact on amyloidogenesis and disease. Crit Rev Clin Lab Sci 2024:1-25. [PMID: 38850014 DOI: 10.1080/10408363.2024.2350379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 04/29/2024] [Indexed: 06/09/2024]
Abstract
Transthyretin (TTR), a homotetrameric protein found in plasma, cerebrospinal fluid, and the eye, plays a pivotal role in the onset of several amyloid diseases with high morbidity and mortality. Protein aggregation and fibril formation by wild-type TTR and its natural more amyloidogenic variants are hallmarks of ATTRwt and ATTRv amyloidosis, respectively. The formation of soluble amyloid aggregates and the accumulation of insoluble amyloid fibrils and deposits in multiple tissues can lead to organ dysfunction and cell death. The most frequent manifestations of ATTR are polyneuropathies and cardiomyopathies. However, clinical manifestations such as carpal tunnel syndrome, leptomeningeal, and ocular amyloidosis, among several others may also occur. This review provides an up-to-date listing of all single amino-acid mutations in TTR known to date. Of approximately 220 single-point mutations, 93% are considered pathogenic. Aspartic acid is the residue mutated with the highest frequency, whereas tryptophan is highly conserved. "Hot spot" mutation regions are mainly assigned to β-strands B, C, and D. This manuscript also reviews the protein aggregation models that have been proposed for TTR amyloid fibril formation and the transient conformational states that convert native TTR into aggregation-prone molecular species. Finally, it compiles the various in vitro TTR aggregation protocols currently in use for research and drug development purposes. In short, this article reviews and discusses TTR mutagenesis and amyloidogenesis, and their implications in disease onset.
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Affiliation(s)
- Zaida L Almeida
- Chemistry Department and Coimbra Chemistry Centre - Institute of Molecular Sciences (CQC-IMS), University of Coimbra, Coimbra, Portugal
| | - Daniela C Vaz
- Chemistry Department and Coimbra Chemistry Centre - Institute of Molecular Sciences (CQC-IMS), University of Coimbra, Coimbra, Portugal
- School of Health Sciences, Polytechnic Institute of Leiria, Leiria, Portugal
- LSRE-LCM - Leiria, Portugal & ALiCE - Associate Laboratory in Chemical Engineering, University of Porto, Porto, Portugal
| | - Rui M M Brito
- Chemistry Department and Coimbra Chemistry Centre - Institute of Molecular Sciences (CQC-IMS), University of Coimbra, Coimbra, Portugal
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Neculae G, Adam R, Jercan A, Bădeliță S, Tjahjadi C, Draghici M, Stan C, Bax JJ, Popescu BA, Marsan NA, Coriu D, Jurcuț R. Cardiac amyloidosis is not a single disease: a multiparametric comparison between the light chain and transthyretin forms. ESC Heart Fail 2024. [PMID: 38757395 DOI: 10.1002/ehf2.14852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 03/31/2024] [Accepted: 04/24/2024] [Indexed: 05/18/2024] Open
Abstract
AIMS Systemic amyloidosis represents a heterogeneous group of diseases resulting from amyloid fibre deposition. The purpose of this study is to establish a differential diagnosis algorithm targeted towards the two most frequent subtypes of CA. METHODS AND RESULTS We prospectively included all consecutive patients with ATTR and AL evaluated between 2018 and 2022 in two centres in a score derivation cohort and a different validation sample. All patients had a complete clinical, biomarker, electrocardiographic, and imaging evaluation. Confirmation of the final diagnosis with amyloid typing was performed according to the current international recommendations. The study population included 81 patients divided into two groups: ATTR (group 1, n = 32: 28 variant and 4 wild type) and AL (group 2, n = 49). ATTR patients were younger (50.7 ± 13.9 vs. 60.2 ± 7.3 years, P = 0.0001), and significantly different in terms of NT-proBNP [ATTR: 1472.5 ng/L (97-4218.5) vs. AL 8024 ng/L (3058-14 069) P = 0.001], hs-cTn I [ATTR: 10 ng/L (4-20) vs. AL 78 ng/L (32-240), P = 0.0002], GFR [ATTR 95.4 mL/min (73.8-105.3) vs. AL: 68.4 mL/min (47.8-87.4) P = 0.003]. At similar left ventricular (LV) wall thickness and ejection fraction, the ATTR group had less frequently pericardial effusion (ATTR: 15% vs. AL: 33% P = 0.0027), better LV global longitudinal strain (ATTR: -13.1% ± 3.5 vs. AL: -9.1% ± 4.3 P = 0.04), RV strain (ATTR: -21.9% ± 6.2 vs. AL: -16.8% ± 6 P = 0.03) and better reservoir function of the LA strain (ATTR: 22% ± 12 vs. AL: 13.6% ± 7.8 P = 0.02). Cut-off points were calculated based on the Youden method. We attributed to 2 points for parameters having an AUC > 0.75 (NT-proBNP AUC 0.799; hs-cTnI AUC 0.87) and 1 point for GFR (AUC 0.749) and TTE parameters (GLS AUC 0.666; RV FWS AUC 0.649, LASr AUC 0.643). A score of equal or more than 4 points has been able to differentiate between AL and ATTR (sensitivity 80%, specificity 62%, AUC = 0.798). The differential diagnosis score system was applied to the validation cohort of 52 CA patients showing a sensitivity of 81% with specificity of 77%. CONCLUSIONS CA is a complex entity and requires extensive testing for a positive diagnosis. This study highlights a series of non-invasive checkpoints, which can be useful in guiding the decision-making process towards a more accurate and rapid differential diagnosis.
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Affiliation(s)
- Gabriela Neculae
- Expert Centre for Rare Cardiovascular Diseases, Prof. Dr. C.C. Iliescu Emergency Institute for Cardiovascular Diseases, Bucharest, Romania
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Robert Adam
- Expert Centre for Rare Cardiovascular Diseases, Prof. Dr. C.C. Iliescu Emergency Institute for Cardiovascular Diseases, Bucharest, Romania
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Andreea Jercan
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Department of Hematology, Fundeni Clinical Institute, Bucharest, Romania
| | - Sorina Bădeliță
- Department of Hematology, Fundeni Clinical Institute, Bucharest, Romania
| | - Catherina Tjahjadi
- Department of Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Mirela Draghici
- Department of Neurology, Fundeni Clinical Institute, Bucharest, Romania
| | - Claudiu Stan
- Department of Nuclear Medicine, Fundeni Clinical Institute, Bucharest, Romania
| | - Jeroen J Bax
- Department of Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Bogdan A Popescu
- Expert Centre for Rare Cardiovascular Diseases, Prof. Dr. C.C. Iliescu Emergency Institute for Cardiovascular Diseases, Bucharest, Romania
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
| | - Nina Ajmone Marsan
- Department of Cardiology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Daniel Coriu
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Department of Hematology, Fundeni Clinical Institute, Bucharest, Romania
| | - Ruxandra Jurcuț
- Expert Centre for Rare Cardiovascular Diseases, Prof. Dr. C.C. Iliescu Emergency Institute for Cardiovascular Diseases, Bucharest, Romania
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
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Dixon S, Kang X, Quan D. Practical Guidance for the Use of Patisiran in the Management of Polyneuropathy in Hereditary Transthyretin-Mediated Amyloidosis. Ther Clin Risk Manag 2023; 19:973-981. [PMID: 38047038 PMCID: PMC10691373 DOI: 10.2147/tcrm.s361706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 11/13/2023] [Indexed: 12/05/2023] Open
Abstract
Variant transthyretin amyloidosis (ATTRv) is an autosomal dominant inherited genetic disorder that affects 5000-10,000 people worldwide. It is caused by mutations in the transthyretin (TTR) gene and results in amyloid deposition in a variety of organs due to abnormal accumulation of TTR protein fibrils. Although this is a multisystem disorder, the heart and peripheral nerves are the preferentially affected organs. Over 150 TTR gene mutations have been associated with this disease and the clinical phenotype can vary significantly. Severe forms of the disorder can be fatal. Fortunately, the oligonucleotide-based therapy era has resulted in the development of several novel treatment options. Patisiran is a small interfering RNA (siRNA) encapsulated in a lipid nanoparticle that targets both mutant and wild-type TTR and results in significant reductions of the TTR protein in the serum and in tissue deposits. Patisiran has been approved for treatment of adults with polyneuropathy due to hereditary TTR-mediated amyloidosis in both the United States (US) and European Union (EU). In this review, we will discuss the development of patisiran, the clinical trials that lead to treatment approval, and provide guideline parameters for use in clinical practice. .
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Affiliation(s)
- Stacy Dixon
- Department of Neurology, University of Colorado, Aurora, CO, USA
| | - Xuan Kang
- Department of Neurology, University of Colorado, Aurora, CO, USA
| | - Dianna Quan
- Department of Neurology, University of Colorado, Aurora, CO, USA
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Loser V, Benkert P, Vicino A, Lim Dubois Ferriere P, Kuntzer T, Pasquier J, Maceski A, Kuhle J, Theaudin M. Serum neurofilament light chain as a reliable biomarker of hereditary transthyretin-related amyloidosis-A Swiss reference center experience. J Peripher Nerv Syst 2023; 28:86-97. [PMID: 36471582 DOI: 10.1111/jns.12524] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/12/2022] [Accepted: 11/28/2022] [Indexed: 12/12/2022]
Abstract
Hereditary transthyretin-related (hATTR) amyloidosis is a rare disease, causing a disabling and life-threatening axonal length-dependent polyneuropathy. Monitoring of disease progression and treatment response is difficult. We aimed to determine if serum neurofilament light chain (sNfL) is a reliable and early biomarker of peripheral neuropathy in hATTR amyloidosis. We prospectively included 20 hATTR patients, 14 symptomatic and 6 asymptomatic. Patients were assessed at baseline and 1 year, including a full clinical examination with disease severity and functional scores, electrochemical skin conductance measurement with Sudoscan and nerve conduction studies, and sNfL level. hATTR patient sNfL were also compared with sNfL of 4532 healthy controls of a reference database by calculating age and BMI-adjusted Z scores. At baseline, median sNfL concentration was 3.6-fold higher in symptomatic than asymptomatic hATTR patients (P = .003), and this difference was also found in our under 60-years-old patients (P = .003). There was no significant difference of sNfL concentration between asymptomatic patients and healthy controls (Z-score of -0.29), but a significant difference between symptomatic patients and healthy controls (Z-score of 2.52). We found a significant correlation between sNfL levels and most clinical and electrophysiological disease severity scores, the strongest correlation being with the NIS score. sNfL seems to be a reliable biomarker of peripheral neuropathy severity in hATTR amyloidosis and can distinguish between asymptomatic and symptomatic patients. sNfL could also become a reliable biomarker to establish disease onset and treatment response.
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Affiliation(s)
- Valentin Loser
- Nerve-Muscle Unit, Department of Clinical Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Pascal Benkert
- Multiple Sclerosis Centre and Research Centre for Clinical Neuroimmunology and Neuroscience (RC2NB), Departments of Biomedicine and Clinical Research, University Hospital and University of Basel, Basel, Switzerland
| | - Alex Vicino
- Nerve-Muscle Unit, Department of Clinical Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Pansy Lim Dubois Ferriere
- Nerve-Muscle Unit, Department of Clinical Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Thierry Kuntzer
- Nerve-Muscle Unit, Department of Clinical Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Jérôme Pasquier
- Center for Primary Care and Public Health (Unisanté), University of Lausanne, Lausanne, Switzerland
| | - Aleksandra Maceski
- Multiple Sclerosis Centre and Research Centre for Clinical Neuroimmunology and Neuroscience (RC2NB), Departments of Biomedicine and Clinical Research, University Hospital and University of Basel, Basel, Switzerland
| | - Jens Kuhle
- Multiple Sclerosis Centre and Research Centre for Clinical Neuroimmunology and Neuroscience (RC2NB), Departments of Biomedicine and Clinical Research, University Hospital and University of Basel, Basel, Switzerland
| | - Marie Theaudin
- Nerve-Muscle Unit, Department of Clinical Neurosciences, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
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Cryo-EM structure of an ATTRwt amyloid fibril from systemic non-hereditary transthyretin amyloidosis. Nat Commun 2022; 13:6398. [PMID: 36302762 PMCID: PMC9613903 DOI: 10.1038/s41467-022-33591-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 09/23/2022] [Indexed: 12/25/2022] Open
Abstract
Wild type transthyretin-derived amyloid (ATTRwt) is the major component of non-hereditary transthyretin amyloidosis. Its accumulation in the heart of elderly patients is life threatening. A variety of genetic variants of transthyretin can lead to hereditary transthyretin amyloidosis, which shows different clinical symptoms, like age of onset and pattern of organ involvement. However, in the case of non-hereditary transthyretin amyloidosis ATTRwt fibril deposits are located primarily in heart tissue. In this structural study we analyzed ATTRwt amyloid fibrils from the heart of a patient with non-hereditary transthyretin amyloidosis. We present a 2.78 Å reconstructed density map of these ATTRwt fibrils using cryo electron microscopy and compare it with previously published V30M variants of ATTR fibrils extracted from heart and eye of different patients. All structures show a remarkably similar spearhead like shape in their cross section, formed by the same N- and C-terminal fragments of transthyretin with some minor differences. This demonstrates common features for ATTR fibrils despite differences in mutations and patients.
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Ueda M. Transthyretin: Its function and amyloid formation. Neurochem Int 2022; 155:105313. [PMID: 35218869 DOI: 10.1016/j.neuint.2022.105313] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 02/20/2022] [Accepted: 02/20/2022] [Indexed: 10/19/2022]
Abstract
Transthyretin (TTR), which is one of the major amyloidogenic proteins in systemic amyloidosis, forms extracellular amyloid deposits in the systemic organs such as nerves, ligaments, heart, and arterioles, and causes two kinds of systemic amyloidosis, hereditary ATTR (ATTRv) amyloidosis induced by variant TTR and aging-related wild-type ATTR (ATTRwt) amyloidosis. More than 150 different mutations, most of which are amyloidogenic, have been reported in the TTR gene. Since most disease-associated mutations affect TTR tetramer dissociation rates, destabilization of TTR tetramers is widely believed to be a critical step in TTR amyloid formation. Recently, effective disease-modifying therapies such as TTR tetramer stabilizers and TTR gene silencing therapies have been developed for ATTR amyloidosis. This study reviews the clinical phenotypes of ATTR amyloidosis, TTR features, and recent progress in promising therapies for ATTR amyloidosis.
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Affiliation(s)
- Mitsuharu Ueda
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto, 860-0811, Japan.
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Waddington-Cruz M, Wixner J, Amass L, Kiszko J, Chapman D, Ando Y. Characteristics of Patients with Late- vs. Early-Onset Val30Met Transthyretin Amyloidosis from the Transthyretin Amyloidosis Outcomes Survey (THAOS). Neurol Ther 2021; 10:753-766. [PMID: 34024024 PMCID: PMC8571445 DOI: 10.1007/s40120-021-00258-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 05/08/2021] [Indexed: 11/29/2022] Open
Abstract
INTRODUCTION Hereditary transthyretin amyloidosis (ATTRv amyloidosis) is a clinically heterogeneous disease caused by mutations in the transthyretin (TTR) gene. The most common mutation, Val30Met, can manifest as an early- or late-onset disease. METHODS The Transthyretin Amyloidosis Outcomes Survey (THAOS) is an ongoing, global, longitudinal, observational survey of patients with transthyretin amyloidosis, including both inherited and wild-type disease and asymptomatic patients with TTR mutations. This is a descriptive analysis of symptomatic patients with ATTRv Val30Met amyloidosis with late- (age at least 50 years) vs. early-onset (age less than 50 years) disease in THAOS (data cutoff August 1, 2019). RESULTS Of 1389 patients with ATTRv Val30Met amyloidosis, 491 (35.3%) had late-onset disease. Compared with early-onset, patients with late-onset were more likely to be male (66.2% vs. 53.6%) and have a longer mean (standard deviation [SD]) time from onset to diagnosis (3.8 [3.4] vs. 2.7 [4.1] years). Late-onset disease was associated with more severe neurological impairment at enrollment (median [10th, 90th percentile] derived Neuropathy Impairment Score in the Lower Limbs, 25.0 [4.0, 69.3] vs. 8.0 [0, 54.8]; Neurologic Composite Score, 42.0 [2.0, 155.0] vs. 21.0 [0, 102.0]). Cardiac findings were more prominent in late-onset disease. An overall interpretation of electrocardiogram as abnormal was reported in 72.1% of late-onset patients (vs. 44.3% early-onset). A left-ventricular septal thickness of at least 12 mm was reported in 69.7% of late-onset patients (vs. 14.6% early-onset). All differences were statistically significant (p < 0.001). CONCLUSION In THAOS, late-onset ATTRv Val30Met amyloidosis is common, presenting with more severe neurologic and cardiac findings at enrollment. Heterogeneity of disease may make it more difficult to diagnose. Increased recognition of late-onset ATTRv Val30Met amyloidosis could lead to more timely diagnosis and improve patient outcomes. TRIAL REGISTRATION ClinicalTrials.gov NCT00628745.
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Affiliation(s)
- Márcia Waddington-Cruz
- CEPARM, National Amyloidosis Referral Center, University Hospital, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Jonas Wixner
- Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | | | | | | | - Yukio Ando
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
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Alreshq R, Ruberg FL. Clinical approach to genetic testing in amyloid cardiomyopathy: from mechanism to effective therapies. Curr Opin Cardiol 2021; 36:309-317. [PMID: 33605615 PMCID: PMC8221237 DOI: 10.1097/hco.0000000000000841] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW To highlight the evolving understanding of genetic variants, utility of genetic testing, and the selection of novel therapies for cardiac amyloidosis. RECENT FINDINGS The last decade has seen considerable progress in cardiac amyloidosis recognition given the advancement in cardiac imaging techniques and widespread availability of genetic testing. A significant shift in the understanding of a genetic basis for amyloidosis has led to the development of disease-modifying therapeutic strategies that improve survival. SUMMARY The systemic amyloidoses are disorders caused by extracellular deposition of misfolded amyloid fibrils in various organs. Immunoglobulin light-chain or transthyretin amyloidosis are the most common types associated with cardiac manifestations. Genetic testing plays a central role in the identification of genotypes that are associated with different clinical phenotypes and influence prognosis. Given the emergence of effective therapies, a systematic approach to the diagnosis of cardiac amyloidosis, with the elucidation of genotype when indicated, is essential to select the appropriate treatment.
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Affiliation(s)
- Rabah Alreshq
- Section of Cardiovascular Medicine, Department of Medicine
- Amyloidosis Center
| | - Frederick L Ruberg
- Section of Cardiovascular Medicine, Department of Medicine
- Amyloidosis Center
- Department of Radiology, Boston University School of Medicine, Boston Medical Center, Boston, Massachusetts, USA
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Racial and Ethnic Disparities in Transthyretin Cardiac Amyloidosis. CURRENT CARDIOVASCULAR RISK REPORTS 2021; 15. [DOI: 10.1007/s12170-021-00670-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Misumi Y, Ueda M, Masuda T, Tsuda Y, Nomura T, Okada M, Inoue Y, Tasaki M, Obayashi K, Yamashita T, Ando Y. Characteristics of acquired transthyretin amyloidosis: A case series and review of the literature. Neurology 2019; 93:e1587-e1596. [PMID: 31511348 DOI: 10.1212/wnl.0000000000008360] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 05/16/2019] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To elucidate the clinical characteristics of acquired ATTR amyloidosis after domino liver transplantation (DLT) with liver grafts explanted from patients with hereditary variant ATTR (ATTRv) amyloidosis. METHODS We evaluated the presence of amyloid deposits and clinical symptoms in 30 recipients of domino liver transplants (24 men and 6 women) who underwent DLT with liver grafts explanted from patients with ATTRv amyloidosis. We analyzed symptoms and measures of 7 cases of symptomatic acquired ATTR amyloidosis and compared those with 30 patients with ATTRv amyloidosis who were the domino liver donors. We also reviewed the literature on case studies of acquired ATTR amyloidosis. RESULTS We found amyloid deposition in 13 of our 30 domino liver recipients. A Kaplan-Meier analysis estimated that the median time from DLT to the first detection of amyloid was 8.5 years. In the literature review, the mean time was 7.3 years, with a wide range of 0.5-13 years. Our 7 symptomatic cases and the literature cases with acquired ATTR amyloidosis presented with clinical features that differed from patients with ATTRv amyloidosis who were the domino liver donors. Patients with acquired ATTR amyloidosis showed markedly milder autonomic disturbance, which is one of the main symptoms of ATTRv amyloidosis. CONCLUSIONS Careful monitoring is required for DLT recipients of ATTRv liver grafts because the time from DLT to disease onset has a wide range and the clinical picture of these DLT recipients is distinct from that of liver donors.
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Affiliation(s)
- Yohei Misumi
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan.
| | - Mitsuharu Ueda
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan
| | - Teruaki Masuda
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan
| | - Yukimoto Tsuda
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan
| | - Toshiya Nomura
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan
| | - Masamitsu Okada
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan
| | - Yasuteru Inoue
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan
| | - Masayoshi Tasaki
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan
| | - Konen Obayashi
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan
| | - Taro Yamashita
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan
| | - Yukio Ando
- From the Department of Neurology, Graduate School of Medical Sciences (Y.M., M.U., T.M., Y.T., T.N., M.O., Y.I., T.Y., Y.A.), and Department of Morphological and Physiological Sciences, Graduate School of Health Sciences (M.T., K.O.), Kumamoto University, Japan
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Pinto MV, Pinto LF, Dias M, Rosa RS, Mundayat R, Pedrosa RC, Waddington-Cruz M. Late-onset hereditary ATTR V30M amyloidosis with polyneuropathy: Characterization of Brazilian subjects from the THAOS registry. J Neurol Sci 2019; 403:1-6. [PMID: 31163298 DOI: 10.1016/j.jns.2019.05.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 05/06/2019] [Accepted: 05/27/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Despite growing numbers of patients diagnosed with late-onset hereditary ATTR V30M amyloidosis with polyneuropathy (ATTRv-PN), this condition remains poorly characterized in Brazil. OBJECTIVE Characterize late-onset V30M ATTRv-PN in Brazil. MATERIAL AND METHODS Demographic and clinical data at the time of enrolment for Brazilian subjects with symptomatic V30M ATTRv-PN were extracted from the ongoing, multinational, longitudinal, observational Transthyretin Amyloidosis Outcomes Survey (THAOS; cut-off date: January 30, 2017). Subjects were divided into those with symptom onset at age <50 years (EO-V30M), and at age ≥50 years (LO-V30M). RESULTS A total of 96 Val30Met patients were symptomatic. LO-V30M (n = 25, 26.0%) had a longer time to diagnosis (mean 5.1 vs. 2.8 yrs.; p = 0.006) and less frequently positive family history (40% vs. 95.8%; p < 0.0001) than EO-V30M. Clinically, subjects with LO-V30M had more imbalance (92% vs. 54.9%; p = 0.006), deep sensory loss (100% vs. 80%; p = 0.0178), electrocardiogram abnormalities (88.9% vs. 59.4; p = 0.0241), and interventricular septum hypertrophy (69.2% vs. 0%; p < 0001) and less frequently sensory dissociation (12% vs. 74%; p < 0.0001). Also, LO-V30M tended to have more severe mean Neurologic Composite Score (101 vs. 70 pts.; p = 0.1136). CONCLUSIONS LO-V30M ATTRv-PN is not unusual in Brazil, tending to be more difficult to diagnose and present with a more severe phenotype, with more large nerve fibers and cardiac involvement than EO-V30M. TRIAL REGISTRATION ClinicalTrials.gov: NCT00628745.
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Affiliation(s)
- Marcus Vinicius Pinto
- National Amyloidosis Referral Center, CEPARM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Department of Neurology, Mayo Clinic, Rochester, MN, USA.
| | - Luiz Felipe Pinto
- National Amyloidosis Referral Center, CEPARM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Moises Dias
- National Amyloidosis Referral Center, CEPARM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Renata Santa Rosa
- National Amyloidosis Referral Center, CEPARM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Roberto Coury Pedrosa
- National Amyloidosis Referral Center, CEPARM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcia Waddington-Cruz
- National Amyloidosis Referral Center, CEPARM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
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Koike H, Fukami Y, Nishi R, Kawagashira Y, Iijima M, Sobue G, Katsuno M. Clinicopathological spectrum and recent advances in the treatment of hereditary transthyretin amyloidosis. ACTA ACUST UNITED AC 2019. [DOI: 10.1111/ncn3.12306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Haruki Koike
- Department of Neurology Nagoya University Graduate School of Medicine Nagoya Japan
| | - Yuki Fukami
- Department of Neurology Nagoya University Graduate School of Medicine Nagoya Japan
| | - Ryoji Nishi
- Department of Neurology Nagoya University Graduate School of Medicine Nagoya Japan
| | - Yuichi Kawagashira
- Department of Neurology Nagoya University Graduate School of Medicine Nagoya Japan
| | - Masahiro Iijima
- Department of Neurology Nagoya University Graduate School of Medicine Nagoya Japan
| | - Gen Sobue
- Department of Neurology Nagoya University Graduate School of Medicine Nagoya Japan
- Research Division of Dementia and Neurodegenerative Disease 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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