Mechanisms and Treatment of Exercise Intolerance and Persistent Fatigue in Spinal Muscular Atrophy

Spinal Muscular Atrophy Clinical Trial

Official title:

Mechanisms and Treatment of Exercise Intolerance and Persistent Fatigue in Spinal Muscular Atrophy

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05518773
• Other study ID #: AAAT5811
• Status: Recruiting
• Start date: December 15, 2022
• Est. completion date: September 1, 2025

Study information

• Verified date: April 2024
• Source: Columbia University
• Contact: Jacqueline Montes, PT, EdD
• Phone: 212-305-8916
• Email: jm598[@]cumc.columbia.edu
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

This study will focus on the pathophysiological underpinnings of reduced exercise capacity and fatigue in ambulatory patients with spinal muscular atrophy (SMA). There has been laboratory evidence to suggest that the molecular mechanisms underlying mitochondrial biogenesis may be vulnerable to survival motor neuron (SMN) protein deficiency. This is an observational, single visit study including 34 ambulatory SMA patients treated with SMN repletion therapies (risdiplam or nusinersen) for at least 6 months at enrollment.

Description:

SMN depletion affects muscle mitochondria and thus muscle function as a result. The relationship between these and their effect(s) on fatigue in the context of SMN repletion treatment has not been evaluated. If muscle function is vulnerable to SMN insufficiency, treatment strategies targeting muscle in addition to the central nervous system (motor neurons) may ameliorate fatigue and improve exercise capacity, thereby improving quality of life and bringing SMA treatments closer to a cure. This project explores such an idea by comparing the effects of the two different SMN repletion modalities in patients. This is an observational cross-sectional study involving ambulatory SMA children and adults treated for at least 6 months with SMN repletion therapy, either (1) systemically with risdiplam, or (2) intrathecally (central nervous system-only), with nusinersen.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 34
• Est. completion date: September 1, 2025
• Est. primary completion date: June 30, 2025
• Accepts healthy volunteers: No
• Gender: All
• Age group: 8 Years to 55 Years

Eligibility

Inclusion Criteria:

• Genetic confirmation of SMA with laboratory documentation of homozygous deletion of survival motor neuron (SMN1) exon 7;

• At least 8 years of age at time of signing Informed Consent Form (or assent)

• Children or adults currently receiving treatment, for at least 6 months, with SMN repletion therapy, either with

(1) risdiplam, or (2) nusinersen

• Able to walk independently at least 25 meters

• Able to tread a stationary cycle ergometer.

Exclusion Criteria:

• Unable to walk 25 meters independently.

• Use of investigational medications intended for the treatment of SMA within 30 days prior to study entry.

• The presence of any contraindication to exercise according the American College of Sports Medicine (ACSM) criteria.

Related Conditions & MeSH terms

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

Locations

Country	Name	City	State
United States	Columbia University Irving Medical Center	New York	New York

Sponsors (2)

Lead Sponsor	Collaborator
Columbia University	Genentech, Inc.

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	Relationship of muscle quality and function	Muscle quality and architecture will be assessed using MRI and muscle ultrasound of the lower body, and the relationship to strength, function, and fitness will be evaluated.	Baseline
Primary	Peak oxygen uptake	Participants will undergo an exercise tolerance test performed by a clinical exercise physiologist using an electronically-braked recumbent cycle ergometer to determine peak oxygen uptake (VO2 max).	Baseline
Secondary	NIRS derived index of muscle oxygen extraction	Near Infrared Spectroscopy (NIRS) is a simple, non-invasive method to measure oxygen in muscle and other tissues in vivo.	Baseline
Secondary	Distance walked during the Six Minute Walk Test (6MWT)	6MWT is an objective evaluation of functional exercise capacity, measures the maximum distance a person can walk in six minutes over a 25-meter linear course.	Baseline
Secondary	Leg muscle composition	To characterize leg muscle composition, quality and architecture using MRI and ultrasound in individuals with SMA treated with agents that restore SMN either systemically (risdiplam) or to central nervous system alone (nusinersen).	Baseline