Phase 3 Evidence Library

Paper Library

Curated FKRP paper summaries with structured findings, plain-language practical relevance, and explicit limitations.

14 records

2026 · JACC Case Reports

Discordant Cardiomyopathy Phenotypes in Siblings With Homozygous FKRP c.1100T>C

Two-sibling case report describing different cardiac courses despite the same homozygous FKRP variant.

case report CardiacPhenotype Clinicians

Takeaway: The siblings had different cardiac phenotypes and imaging courses. A two-person family report cannot set surveillance intervals or change public cardiac guidance without specialist review.

2026 · Annals of Clinical and Translational Neurology

Predicting Loss of Ambulation in Limb Girdle Muscular Dystrophy R9

Longitudinal natural-history analysis relating timed motor tests to loss of functional ambulation in 97 people with LGMDR9.

cohort Natural HistoryTrial Readiness Families

Takeaway: Timed walking and stair measures predicted a study-defined ambulation outcome at group level, but the model is not a guaranteed timeline or a stand-alone forecast for an individual.

2026 · Neurology Genetics

Quantitative Measurement of Glycosylated Alpha-Dystroglycan as a Biomarker for Disease Severity in LGMD2I/R9

Prospective 12-month observational study of muscle-biopsy glycosylated alpha-dystroglycan measurements in genetically confirmed LGMD2I/R9.

cohort Trial ReadinessMonitoring Clinicians

Takeaway: Glycosylated alpha-dystroglycan was lower than the selected control and stable over 6 to 12 months in the biopsy cohort, supporting biomarker research but not proving treatment benefit or routine clinical use.

2024 · JIMD Reports

Oral ribose supplementation in dystroglycanopathy: A single case study

A six-month oral D-ribose study reported in one adult with FKRP-related LGMD2I.

case report Therapy DevelopmentMonitoring Families

Takeaway: This is a single-adult case without a control group. It establishes no pediatric dose or pediatric safety, and the paper reported no clear objective improvement in clinical or patient-reported outcome measures.

2021 · Trends in Cell Biology

Fukutin-Related Protein: From Pathology to Treatments

Review article mapping FKRP biology, disease mechanisms, model systems, and the treatment approaches that were emerging by 2021.

review Therapy DevelopmentGenetics General

Takeaway: This 2021 review connects FKRP biology with experimental small-molecule, gene, and cell approaches; it is background reading, not a current treatment guide.

2017 · Journal of Child Neurology

Childhood Activity on Progression in Limb Girdle Muscular Dystrophy 2I

Retrospective analysis relating self-reported middle-school activity to later motor and respiratory measures in 41 people with FKRP variants.

cohort RehabilitationNatural History Families

Takeaway: The study found no association between recalled middle-school activity level and selected later motor or respiratory measures, but it was not a prospective exercise-safety trial and cannot prescribe activity.

2017 · Neurology

Illness-associated muscle weakness in dystroglycanopathies

Natural-history and survey study describing acute, transient weakness around febrile illness across several dystroglycanopathy genes.

cohort PhenotypeCongenital Disease Families

Takeaway: Acute illness-associated weakness was reported more often in the surveyed dystroglycanopathy group, especially in young children, but this mixed-gene retrospective evidence cannot define an individual emergency pathway or treatment.

2011 · Neurology

Myoglobinuria and muscle pain are common in patients with limb-girdle muscular dystrophy 2I

Retrospective report of self-reported myoglobinuria and muscle pain in a 26-person FKRP-related LGMD2I cohort.

cohort PhenotypeDiagnosis Families

Takeaway: Myoglobinuria and exertion-associated muscle pain were reported in this small cohort, but the retrospective design does not provide a triage rule, prevention protocol, or prediction for an individual.

2007 · BMC Musculoskeletal Disorders

LGMD2I in a North American population

A genetic screening study identifying FKRP-related LGMD in two North American referral cohorts.

cohort GeneticsDiagnosis Clinicians

Takeaway: Seven FKRP diagnoses among 87 people evaluated for LGMD illustrate the value of molecular confirmation when clinical presentations overlap.

2003 · Neurology

The phenotype of limb-girdle muscular dystrophy type 2I

An early FKRP cohort describing respiratory and cardiac involvement. A July 2003 correction is recorded, but its contents remain unverified here.

cohort RespiratoryPhenotype Families

Takeaway: The public abstract reports cardiopulmonary complications sometimes out of proportion to skeletal weakness. Check the publisher's correction before relying on detailed results.