This was a Phase IIIb open-label, single arm, multi-center study to evaluate the safety, tolerability and efficacy of OAV101B in participants with SMA aged 2 to \<18 years after the discontinuation of treatment with nusinersen or risdiplam. The study aimed to enroll approximately 28 participants across each of 2 age brackets (2 to \<6 years, and 6 to \<18 years).
Eligible participants received a single OAV101B administration of 1.2x1014 vector genomes on Day 1 (Treatment period) and were followed for a period of 52 weeks. Participants were admitted to the hospital on Day -1 for pre-treatment baseline procedures. After receiving OAV101B on Day 1, participants underwent in-patient safety monitoring over the next 48 hours, after which the participant could be discharged, based on Investigator judgment.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
27
Intrathecal administration of OAV101 at a dose of 1.2 x 10\^14 vector genomes, one time dose
Boston Childrens Hospital
Boston, Massachusetts, United States
Child Hosp Of The Kings Daughters
Norfolk, Virginia, United States
University of Wisconsin Madison Medical School
Madison, Wisconsin, United States
Novartis Investigative Site
Parkville, Victoria, Australia
Novartis Investigative Site
Leuven, Belgium
Novartis Investigative Site
Montreal, Quebec, Canada
Novartis Investigative Site
Bron, France
Novartis Investigative Site
Toulouse, France
Novartis Investigative Site
Roma, RM, Italy
Novartis Investigative Site
Kurume, Fukuoka, Japan
...and 3 more locations
Overview of Treatment-emergent Adverse Events by Age Subgroup
An adverse event (AE) is any untoward medical occurrence (e.g. any unfavorable and unintended sign \[including abnormal laboratory findings\], symptom or disease) in a clinical investigation participant after providing written informed consent for participation in the study. The occurrence of AEs must be sought by non-directive questioning of the participant at each visit during the study. Adverse events also may be detected when they are volunteered by the participant during or between visits or through physical examination findings, laboratory test findings, or other assessments.
Time frame: Adverse events were reported from single dose of study treatment plus 52 weeks, up to a maximum time period of 52 weeks.
Treatment-emergent Adverse Events Related to Treatment by System Organ Class, Preferred Term, Age Subgroup (>= 10%)
An adverse event (AE) is any untoward medical occurrence (e.g. any unfavorable and unintended sign \[including abnormal laboratory findings\], symptom or disease) in a clinical investigation participant after providing written informed consent for participation in the study. The occurrence of AEs must be sought by non-directive questioning of the participant at each visit during the study. Adverse events also may be detected when they are volunteered by the participant during or between visits or through physical examination findings, laboratory test findings, or other assessments.
Time frame: Adverse events were reported from single dose of study treatment plus 52 weeks, up to a maximum time period of 52 weeks.
Adverse Events of Special Interest by System Organ Class, Preferred Term, Age Subgroup
An adverse event (AE) is any untoward medical occurrence (e.g. any unfavorable and unintended sign \[including abnormal laboratory findings\], symptom or disease) in a clinical investigation participant after providing written informed consent for participation in the study. The occurrence of AEs must be sought by non-directive questioning of the participant at each visit during the study. Adverse events also may be detected when they are volunteered by the participant during or between visits or through physical examination findings, laboratory test findings, or other assessments. An adverse event of special interest (AESI) is primarily defined by using standard Medical Dictionary for Regulatory Activities (MedDRA) queries, and identified as follows: Hepatotoxicity, Transient thrombocytopenia, Thrombotic microangiopathy, Cardiac adverse events, signs and symptoms that may be suggestive dorsal root ganglia toxicity, and new malignancies.
Time frame: Adverse events were reported from single dose of study treatment plus 52 weeks, up to a maximum time period of 52 weeks.
Change From Baseline at Week 52 Visit in the HFMSE Total Score - Mean (SD)
The Hammersmith Functional Motor Scale Expanded (HFMSE) is a SMA-specific 33-item assessment that is administered by qualified clinical evaluators. Each motor skill item is scored on a 3-point Likert scale from 0 (no response) to 2 (full response), with a total score range of 0 to 66. A higher score indicates a higher ability level.
Time frame: Baseline, Week 52
Change From Baseline at Week 52 Visit in the HFMSE Total Score - LS Means
The Hammersmith Functional Motor Scale Expanded (HFMSE) is a SMA-specific 33-item assessment that is administered by qualified clinical evaluators. Each motor skill item is scored on a 3-point Likert scale from 0 (no response) to 2 (full response), with a total score range of 0 to 66. A higher score indicates a higher ability level.
Time frame: Baseline, Week 52
Change From Baseline at Week 52 Visit in the RULM Total Score - Mean (SD)
The Revised Upper Limb Model (RULM) is a validated, SMA-specific assessment that measures motor performance in the upper limbs from childhood through adulthood in ambulatory and never ambulatory individuals with SMA. The revised version of the test consists of 19 scorable items: 18 items scored on a 0 (unable) to 2 (full achievement) scale, and one item that is scored from 0 (unable) to 1 (able). These item scores are summed to give a total score ranging from 0 to 37 points with lower scores reflecting poorer ability.
Time frame: Baseline, Week 52
Change From Baseline at Week 52 Visit in the RULM Total Score - LS Means
The Revised Upper Limb Model (RULM) is a validated, SMA-specific assessment that measures motor performance in the upper limbs from childhood through adulthood in ambulatory and never ambulatory individuals with SMA. The revised version of the test consists of 19 scorable items: 18 items scored on a 0 (unable) to 2 (full achievement) scale, and one item that is scored from 0 (unable) to 1 (able). These item scores are summed to give a total score ranging from 0 to 37 points with lower scores reflecting poorer ability.
Time frame: Baseline, Week 52
Change From Baseline at Week 52 Visit in Assessment of Caregiver Experience in ACEND Instrument Score - Mean (SD)
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The Assessment of Caregiver Experience in Neuromuscular Disease (ACEND) instrument quantifies the caregiver impact experienced by parents/caregivers of children affected with severe neuromuscular diseases, including children with SMA. The total score is on a scale of 0 to 100 with a higher score indicating that caregivers experienced less intense caregiving impact.
Time frame: Baseline, Week 52
Change From Baseline at Week 52 Visit in Assessment of Caregiver Experience in ACEND Instrument Score - LS Means
The Assessment of Caregiver Experience in Neuromuscular Disease (ACEND) instrument quantifies the caregiver impact experienced by parents/caregivers of children affected with severe neuromuscular diseases, including children with SMA. The total score is on a scale of 0 to 100 with a higher score indicating that caregivers experienced less intense caregiving impact.
Time frame: Baseline, Week 52