Related Experiment Video
Updated: Jun 22, 2026
Isometric and Eccentric Force Generation Assessment of Skeletal Muscles Isolated from Murine Models of Muscular Dystrophies
Published on: January 31, 2013
Natural history of Ullrich congenital muscular dystrophy
1Dubowitz Neuromuscular Centre, UCL Institute of Child Health, London, UK.
Insights
Ullrich congenital muscular dystrophy (UCMD) causes rapid motor and respiratory decline in the first decade. This progressive deterioration impacts ambulation and necessitates respiratory support, highlighting the need for better management strategies.
Area of Science:
- Neurology
- Genetics
- Pediatrics
Background:
- Ullrich congenital muscular dystrophy (UCMD) is a rare genetic disorder affecting muscle function.
- Understanding the natural history of UCMD is crucial for patient care and therapeutic development.
Purpose of the Study:
- To delineate the clinical course, complications, and prognosis of Ullrich congenital muscular dystrophy (UCMD).
- To specifically document life-altering milestones such as loss of ambulation, respiratory compromise, and mortality in UCMD patients.
Main Methods:
- Retrospective case note review of 13 UCMD patients aged 15+ at last visit.
- Data collection included symptom onset, mobility, scoliosis, respiratory function (FVC), and skin abnormalities.
Main Results:
- Mean symptom onset at 12 months; 61.5% achieved independent ambulation by 1.7 years.
- 69.2% became wheelchair users by 11.1 years; all showed abnormal FVC from age 6.
- 9 patients (69.2%) required noninvasive ventilation by 14.3 years; 2 died from respiratory insufficiency.
Conclusions:
- Motor and respiratory function decline rapidly in the first decade of life for UCMD patients.
- Disease progression is consistent but not always tied to age or initial severity.
- Findings aid in anticipating challenges and planning future UCMD therapeutic trials.
Objective:
To describe the course, complications, and prognosis of Ullrich congenital muscular dystrophy (UCMD), with special reference to life-changing events, including loss of ambulation, respiratory insufficiency, and death.
Methods:
Review of the case notes of 13 patients with UCMD, aged 15 years or older at last visit, followed up at a tertiary neuromuscular centre, London, UK, from 1977 to 2007. Data collected were age at onset of symptoms, presenting symptoms, mobility, contractures, scoliosis, skin abnormalities, respiratory function, and feeding difficulties.
Results:
The mean age at onset of symptoms was 12 months (SD 14 months). Eight patients (61.5%) acquired independent ambulation at a mean age of 1.7 years (SD 0.8 years). Nine patients (69.2%) became constant wheelchair users at a mean age of 11.1 years (SD 4.8 years). Three patients continued to ambulate indoors with assistance. Forced vital capacity (FVC) values were abnormal in all patients from age 6 years. The mean FVC (% predicted) declined at a mean rate of 2.6% (SD 4.1%) yearly. Nine patients (69.2%) started noninvasive ventilation at a mean age of 14.3 years (SD 5.0 years). Two patients died of respiratory insufficiency.
Conclusion:
In Ullrich congenital muscular dystrophy (UCMD), the decline in motor and respiratory functions is more rapid in the first decade of life. The deterioration is invariable, but not always correlated with age or severity at presentation. This information should be of help to better anticipate the difficulties encountered by patients with UCMD and in planning future therapeutic trials in this condition.
Related Concept Videos
01:21Satellite Stem Cells and Muscular Dystrophy
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
01:28Disorders of the Skeletal Muscle
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
01:21Smooth Endoplasmic Reticulum
The ER provides optimal conditions for synthesizing steroid hormones and lipids, such as phospholipids and triglycerides. Traditionally, lipid metabolism was considered to be a smooth ER function. However, there is no direct evidence to prove that rough ER is completely excluded from lipid...
01:43Sex-linked Disorders
02:59Animal Mitochondrial Genetics