Natural History Study of Children With LAMA2-related Dystrophies

Institut de Myologie, France

Status

Enrolling

Conditions

Merosin Deficient Congenital Muscular Dystrophy

Treatments

Other: Quality of life

Other: Spine X Ray

Other: Muscular MRI

Other: Motor evaluations

Other: Cognitive assessment

Other: Cardiac evaluation

Other: Pulmonary function test

Other: Biomarkers collection and analysis

Study type

Observational

Funder types

Other

Identifiers

NCT06354790

NatHis LAMA2

Details and patient eligibility

About

The goal of this natural history study is to characterize the disease course, characteristics in paediatric population of LAMA2-RD (related dystrophies) patients.

The aim of the study is to establish a well-described cohort of patients in France with LAMA2-RD for prospective follow-up and recruitment for future clinical trials.

Participants will be follow up during a two years period regarding exhaustive aspects of the pathology:

Muscular function
Respiratory function
Cognitive phenotyping
Quality of life
Growth parameters
Biomarkers

Full description

The international workshop on LAMA2-RD, held in 2019 in Maastricht, stressed the importance of the identification of LAMA2-RD patients and the natural history studies worldwide. Together with the recent progress in preclinical applications, the road to therapy is paved.

However, no effective treatment has currently received market approval. Given the phenotype variability in LAMA2-RD patients, even in very young ones, determining which outcome measure(s) could be the most appropriate to assess the efficacy of potential therapies, and which variables are prognostic of the disease course, is required. In consequence, it is clearly necessary to explore all the aspects of the pathology: physiological, clinical/motor, biological, aligning with current or future international studies though collaboration.

Unlike results obtained through a retrospective study, data from a prospective natural history will be less subject to bias and error. Control of the studied population will also lead to reduce the variability of the results. The different variables explored during this study aim to cover all aspects of the disease and appear to be relevant candidates as outcomes.

The aim of the study is to focus on the clinical phenotyping and to establish a well-described cohort of patients in France with LAMA2-RD for prospective follow-up and recruitment for future clinical trials. One other objective is to validate the use of a large subset of outcome measures in LAMA2-RD. Adding an electrophysiological data will give more insight to the neuropathology of the disease and enlarge the scope of futures therapies.

An exploratory part will test if denaturation profiling of plasma from patients can be used to follow disease progression. Finally, serum and plasma samples from patients will also be stored for future studies focused on searching and validating novel biomarkers in LAMA2-RD.

Enrollment

40 estimated patients

Sex

All

Ages

2 to 15 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Signed informed consent by the Legal Authority Responsible and/or assent by the subject (starting from 6 years old)
Subject must be
Supportive clinical phenotype and diagnosis of LAMA2-RD, confirmed by:
- Two pathogenic variants in the LAMA2 gene (via a diagnostic laboratory included on an approved list of genetic testing laboratories (Annex 1)) or
- Muscle biopsy with absence of merosin (laminin-211) and at least one pathogenic variant in the LAMA2 gene
Absence of another confirmed neurological genetic disease
Willingness to maintain current exercise and/or physical therapy regimen for the duration of the clinical study
Willingness to comply with the study protocol, including all the mandatory study procedures and visits
Affiliated to or a beneficiary of a French or acknowledged in France, social security scheme

Exclusion criteria

Developmental quotient less than 70 and/or behavioral disorder requiring general anesthesia to perform an MRI
Acute medical illness or hospitalization within 30 days prior to informed consent
Participation in a previous trial of any investigational agent for LAMA2-RD, or use of any other investigational therapy within 30 days prior to informed consent, or participation in other clinical studies, within 30 days (or 5 half-lives, whichever is longer) prior to informed consent, which, in the opinion of the PI, may potentially confound results from this study
Other significant medical condition and/or overall fragility of medical status, which in the opinion of the Investigator may confound interpretation of the clinical course of LAMA2-RD
Pregnant or breastfeeding women