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- Noel R Dasgupta, Stacy M Rissing, Jessica Smith, Jeesun Jung, and Merrill D Benson.
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA.
- Amyloid. 2020 Mar 1; 27 (1): 52-58.
AbstractBackground: Cardiomyopathy is a major cause of death in patients with systemic transthyretin amyloidosis. Long term effect of therapy designed to inhibit hepatic production of the amyloid precursor has not been established in cardiomyopathy. The purpose of this study was to evaluate the long term safety and efficacy of transthyretin specific antisense oligonucleotide therapy, inotersen, in transthyretin cardiomyopathy.Methods: Patients with hereditary or wildtype transthyretin cardiomyopathy (NYHA I-III) with an LV wall thickness [Formula: see text]1.3 cm and clinical evidence of congestive heart failure were eligible for this single centre, open label protocol. Safety and cardiac structural and functional parameters were prospectively studied.Results: As of October 2018, 33 subjects have entered the study. Twenty have completed 1 year, 16 have completed 2 years, and 14 have completed three years. At the 2 year time point, mean LV mass decreased by 8.4% as measured by MRI, and exercise tolerance increased by 20.2 metres as measured by 6 minute walk test. Further positive indicators were noted at 3 years, with LV mass decreasing by 11.4% and 6MWT increasing by 16.2 metres.Conclusion: Long term treatment of amyloid cardiomyopathy with inotersen is safe and effective in inhibiting progression and potentially reversing amyloid burden.
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