Active Studies

Defining Endpoints in LGMD

NCT03981289

CAPN3 (LGMD2A)Clinical Assessments, Biomarkers
DYSF (LGMD2B)Clinical Assessments, Biomarkers
ANO5 (LGMD2L)Clinical Assessments, Biomarkers
DNAJB6 (LGMD1D)Clinical Assessments, Biomarkers
Sarcoglycan (LGMD2D) (LGMD2E) (LGMD2C) (LGMD2F)
Clinical Assessments, Biomarkers

The genetic heterogeneity has been a barrier to broad natural history efforts, with prior investigations often limited to single gene mutations. Much attention is paid to the variability within individual mutations (e.g. distal presentations), as opposed to defining the best strategy for measuring change in overall LGMD disease burden. This presents a major dilemma for LGMD rare disease research: how to balance diverse genes leading to overlapping phenotypes, versus variants in the same gene leading to divergent phenotypes. What is clear, is as a group, LGMDs are chronic and progressive leading to significant lifetime morbidity and represent a large unmet clinical need. Recent developments in the investigator’s genetic understanding of LGMD and molecular approaches to therapy have led to proposed gene replacement therapies for at least three of the LGMD mutations. Several of these gene replacement therapies are currently in pre-clinical/phase 1 testing, leading to an urgent need for natural history data. In addition, non-specific therapies which target muscle mass or function are being tested in other muscular dystrophies and may prove beneficial for LGMD.

Inclusion Criteria:

  • Age between 4-65 at enrollment
  • Clinically affected (defined as weakness on bedside evaluation in either a limb-girdle pattern, or in a distal extremity)
  • A genetically or functionally confirmed mutation in ANO5, CAPN3, DYSF, DNAJB6 or SGCA-G.

Exclusion Criteria:

Any other illness that would interfere with the ability to undergo safe testing or would interfere with interpretation of the results in the opinion of the site investigator.

This study will enroll 80 patients overall.

Biomarker Development in LGMD2i

NCT04202627

Limb Girdle Muscular Dystrophy (LGMD) 2i is an autosomal recessive form of LGMD that is due to missense mutations in the FKRP gene. Patients develop progressive proximal muscle weakness that leads to loss of ambulation. Patients will also commonly develop a cardiomyopathy and respiratory compromise. The rationale for this study is to define appropriate COAs for LGMD 2i, which will facilitate therapeutic development and ensure properly powered clinical trials. In addition, measurement of dystroglycan in muscles represents a potential muscle biomarker that could be used in early phase clinical trials as a measure of target engagement. The clinical utility of changes in dystroglycan has not been validated in human samples.

Inclusion Criteria:

  • Age between 10-65 at enrollment
  • Clinically affected (defined as weakness on bedside evaluation in either a limb-girdle pattern, or in a distal extremity)
  • A genetically confirmed mutation in FKRP (LGMD 2i).

Exclusion Criteria:

  • Any other illness that would interfere with the ability to undergo safe testing or would interfere with interpretation of the results in the opinion of the site investigator.
  • History of a bleeding disorder, platelet count <50,000, current use of an anticoagulant.
  • Positive pregnancy test at time any timepoint during the trial

This study will enroll 80 patients overall.