View clinical trials related to Amyloid Neuropathies, Familial.
Filter by:This is a multicenter observational study consisting of retrospective and prospective phases. The retrospective phase will entail secondary data collection from electronic or paper medical records of patients who underwent surgery for CTS to assess their probability of having ATTR PN.
A multicenter observational retrosPective Registry of patIents with transthyretin aMyloid polynEuropathy (hATTR-PN) and chRonic idiopathic axonal polyneuropathy (CIAP) in the population of the Russian Federation (PRIMER) There are no comprehensive epidemiological data on patients with hereditary ATTR-PN (hATTR-PN) and CIAP in the Russian Federation. Therefore, there is a need to conduct a large-scale observational study in the Russian population to obtain information on clinical, electrophysiological and demographic characteristics of patients with hATTR-PN and CIAP. Obtaining the study data will help to identify the patients with axonal polyneuropathy, who deserve TTR gene sequencing, and therefore to allow early treatment and potentially modify disease progression in patients.
The development of cardiac amyloidosis is caused by the deposition of misfolded, insoluble proteins in the extracellular matrix of tissues. An important element of the clinical picture of the disease is the increased risk of thromboembolic complications, independent of the occurrence of atrial fibrillation, and the presence of intracardiac thrombi. The pathomechanism may be related to an increase in filling pressure or amyloid infiltration leading to myocardial damage and endothelial dysfunction, which may activate the prothrombotic inflammatory cascade, resulting in increased thrombogenic potential. Currently, there is limited published data on the potential role of new heart failure biomarkers in the assessment of ATTR cardiomyopathy, particularly in the assessment of asymptomatic carriers of pathogenic TTR variants. Moreover, there are few literature reports on the direct assessment of the coagulation system in this group of patients, and the pathomechanism of the increased thromboembolic risk is unexplored. Purpose of the study: To assess the diagnostic value of biomarkers related to heart failure (growth differentiation factor-15 (GDF15), soluble suppression of tumorigenicity-2 (ST2), galectin-3), amyloidosis ( TTR, tissue inhibitor of metalloproteinase-1 (TIMP-1), matrix metalloproteinase-9 (MMP-9, matrix metalloproteinase-9), neurofilament light chain (NfL)) and the generation potential thrombin as a marker of the prothrombotic state in the course of ATTR. Methods: This prospective, single-center study will include consecutive patients diagnosed with ATTR cardiomyopathy (GROUP 1, n=30), asymptomatic carriers of pathogenic TTR variants (GROUP 2, n=30), and a matched control group of healthy volunteers (GROUP 3 , n=20). Material for research was collected and secured from all study participants. After giving informed consent, all patients will be tested using the ELISA method from peripheral blood (enzyme-linked immunosorbent assay) GDF15, ST2, TTR, TIMP-1, MMP-9, galectin-3, NfL. The values of these biomarkers will be compared in subgroups and correlated with clinical data, laboratory test results, echocardiography including analysis of left ventricular global strain (GLS), and scintigraphy. Additionally, the prothrombotic potential of plasma will be tested in both groups of patients using the calibrated automatic thrombogram (CAT) method, in accordance with the protocol previously used in the laboratory Expected results: The project will provide information on the value of biomarkers in the assessment of ATTR cardiomyopathy, especially in the assessment of asymptomatic carriers of pathogenic TTR variants, which may translate into the creation of a diagnostic algorithm for early identification of the development of the disease. Moreover, it will allow us to determine whether patients with cardiac ATTR are characterized by a prothrombotic state, which has not yet been described in the literature and may have potential clinical implications.
A multicenter observational retrospective-prospective study of prevalence and clinical characteristics of transthyretin amyloidosis (ATTR) cardiomyopathy (CM) in Russian patients with heart failure with preserved ejection fraction (HFpEF) in real clinical practice. The retrospective phase will entail secondary data collection from electronic or paper medical records of patients who are participating/participated in the PRIORITY-CHF study and have HFpEF. Those patients who have a high suspicion of having ATTR-CM and provided informed consent will be invited to participate in the prospective phase. The prospective phase will consist of three visits, during which a routine comprehensive cardiologic evaluation in order to confirm or exclude ATTR-CM diagnosis will be performed. In patients with confirmed ATTR-CM the material for genetic testing will be collected in order to specify the type of ATTR-amyloidosis
Descriptive cross-sectional study on 100 consecutive ATTRwt-CM patients reflecting all NAC stages aiming primarily to investigate ATTRwt-CM patient's quality of life (QoL) measures and their relation to ATTRwt-CM severity. Secondarily aiming to investigate the possibility to measure misTTR and fragTTR in plasma and urine and to detect fragTTR in endomyocardial biopsies from ATTRwt-CM patients. To investigate whether misTTR and fragTTR levels are correlated with ATTRwt-CM severity.
To evaluate the efficacy and safety of a single dose of NTLA-2001 compared to placebo in participants with ATTR-CM.
Hereditary transthyretin amyloidosis (ATTRv, v for variant) is a severe and heterogeneous systemic condition due to mutations in the transthyretin (TTR) gene. The availability of disease-modifying therapies has led to an urgent need to have reliable biomarkers capable of assessing the clinical severity of the disease and of monitoring the efficacy of pharmacological treatment. At the same time, early markers for the clinical onset of ATTRv amyloidosis in presymptomatic subjects are needed to enable earlier initiation of anti-amyloid therapy. In this project the investigators seek to achieve three main goals: to identify and validate disease severity biomarkers in symptomatic patients; to establish disease onset biomarkers of ATTRv amyloidosis in presymptomatic subjects; to explore new pathogenetic mechanisms underlying this multisystem disorder, such as mitochondrial dysfunction and immune response.
Cardiac transthyretin (ATTR) amyloidosis is an infiltrative cardiomyopathy with an inexorably progressive clinical course and poor prognosis. The disease is caused by misfolding of the liver-derived precursor protein transthyretin as a result of an acquired wild-type variant (ATTRwt) or as a hereditary mutant variant (ATTRm). Application of single-photon emission computed tomography (SPECT) provides greater anatomic resolution, enabling the assessment of amyloid burden within individual left ventricle segments.This study aims to describe the pattern of regional myocardial distribution of 3,3-diphosphono-1,2-propanedicarboxylic acid (DPD) SPECT uptake among patients with ATTRwt and ATTRm. It will investigate the clinical, biochemical and echocardiographic, including left ventricle longitudinal strain profile in ATTRwt and ATTRm. Moreover, we will evaluate the presence and extent of DPD cardiac uptake among asymptomatic ATTRm variants carriers.This is a prospective multi-center observational study. The study, after obtaining prior written informed consent, will include consecutive patients who have Grade 1-3 cardiac DPD retention in scintigraphy. In addition, first-degree relatives of patients with ATTRm are going to be enrolled. Patients are going to undergo TTR gene sequencing to assess the presence of pathogenic variants associated with ATTRm. Both planar scintigraphy, SPECT and speckle-tracking echocardiography will be reviewed and interpreted using visual and quantitative approaches.
This is a follow-up study of subjects who received NTLA-2001 in a previous clinical trial as an observational evaluation of the long-term effects of the investigational therapy.
Recent studies have shown that transthyretin amyloidosis (ATTR) can sometimes cause a type of heart failure where the pumping function of the heart is normal, also known as Heart Failure with Preserved Ejection Fraction (HFpEF) or diastolic heart failure. In this single center diagnostic study, we will evaluate for ATTR in patients with HFpEF in order to to determine how frequently this occurs and how we can predict which heart failure patients may have TTR amyloidosis. Our goal is to identify amyloidosis in heart failure patients earlier so that they can start treatment.