Evaluation of the Muscle Strength and Motor Ability in Children With Spinal Muscle Atrophy(SMA) Treated With Valproic Acid

Spinal Muscular Atrophy Clinical Trial

Official title: Evaluation of the Muscle Strength and Motor Ability in Children With Spinal Muscle Atrophy Type II and III Treated With Valproic Acid

Status Completed

Clinical Trial Summary

The purpose of this study is to determine if the treatment with valproic acid can increase the muscle strength and motor ability of children with spinal muscular atrophy.

Clinical Trial Description

Spinal muscular atrophy (SMA) is an autosomal recessive disorder that affects the motoneurons of the spinal anterior corn, resulting in hypotonia and muscle weakness. The knowledge about its molecular mechanism has led to clinical tests with drugs that increase survival motor neuron (SMN) protein level. The valproic acid (VA) that acts as a histone deacetylase inhibitor activates the SMN2 gene increasing the protein level. Methods: Twenty-two patients with type II and III SMA, aged between 2 and 18 years old, were treated with VA and were evaluated five times along a period of one year using the Manual Muscle Test (Medical Research Council scale-MRC), the Hammersmith Motor Ability Score, and the Barthel Index. The first evaluation was coincident with the introduction of VA. Results: After 12 months of therapy, the patients did not gain muscle strength but their motor ability has improved. Children younger than 6 years of age had a higher pronounced gain in motor ability. Conclusion: treatment of SMA patients with VA is one alternative to alleviate the progression of the disease. ;

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Related Conditions & MeSH terms

• Atrophy
• Muscular Atrophy
• Muscular Atrophy, Spinal
• Spinal Muscular Atrophy

• NCT number: NCT01033331
• Study type: Observational
• Source: University of Sao Paulo General Hospital
• Status: Completed
• Phase: N/A
• Start date: July 2006
• Completion date: December 2008