ClinicalTrials.gg
RecruitingNCT04998396Updated Apr 17, 2026

A Study of AAV9 Gene Therapy in Participants With Canavan Disease (CANaspire Clinical Trial)

A Phase 1/2 interventional study of AAV9 BBP-812 in Canavan Disease, sponsored by Aspa Therapeutics. Recruiting at 4 sites in United States. Open to participants aged Up to 30 Months. Per ClinicalTrials.gov, last updated 2026-04-17.

Sponsored by Aspa Therapeutics · Phase 1/2, Interventional, and Treatment

From the registry’s dates

  • Started Sep 2021; still recruiting 5 years 2 months later.
Phase
Phase 1/2
Study type
Interventional
Enrollment
26
Allocation
Non-randomized
Ages
Up to 30 Months
Sex
All
01

Study summary

The main objective of this trial is to evaluate the safety, tolerability, and pharmacodynamic activity of BBP-812, an investigational AAV9-based gene therapy, in pediatric participants with Canavan disease.

Read the detailed description

Canavan disease is an ultra-rare, profoundly disabling and fatal disease with no approved therapy. The Sponsor is developing BBP-812, an investigational gene therapy product for systemic delivery in participants with Canavan disease. BBP-812 is a recombinant adeno-associated virus serotype 9 (rAAV9) vector engineered to deliver the aspartoacylase (ASPA) transgene under control of a ubiquitous promoter to restore ASPA expression in both neuronal and non-neuronal cell types.

02

Conditions studied

  • Canavan Disease

Keywords

  • Canavan Disease
  • AAV
  • AAV9
  • Gene therapy
  • Aspartoacylase
  • ASPA
  • ASPA gene
  • rAAV9
  • ACY2
  • Aminoacylase 2
  • Spongy degeneration
  • N-acetyl-L-aspartic acid (NAA)
  • N-acetylaspartate
  • Rare disease
  • Inherited Metabolic Disorders
  • Leukodystrophy
  • Leukoencephalopathies
  • Autosomal Recessive Disorder
  • Neurodevelopmental diseases
  • CANaspire Clinical Trial
03

In context

Rare Diseases

592 studies on the registry are indexed under Rare Diseases; 125 are open to participants now.

This study's planned enrollment of 26 is below the median of 45 across 339 interventional studies indexed under Rare Diseases.

Browse Rare Diseases studies →

Lead sponsor

Aspa Therapeutics is the lead sponsor of 2 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
Up to 30 Months
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

Key Inclusion Criteria:

  • Maximum age for inclusion is 30 months.
  • Participant has stable health in the opinion of the investigator and as confirmed by medical history and laboratory studies with no acute or chronic hematologic, renal, liver, immunologic, or neurologic disease (other than Canavan disease).
  • Participant has biochemical, genetic, and clinical diagnosis of Canavan disease:

    • Elevated urinary NAA and
    • Biallelic mutation of the ASPA gene determined at Screening or documented in the participant's medical history.
    • Active clinical signs of Canavan disease
  • Participant is up to date on all immunizations per local guidelines

Key Exclusion Criteria:

  • Tests positive for total anti-AAV9 antibodies determined by enzyme-linked immunosorbent assay (ELISA).
  • Received prior gene therapy or other therapy (including vaccines) involving AAV.
  • Participant is receiving high-dose therapy with .
  • Participant has significantly progressed Canavan disease characterized as:

    • Presence of continuous/constant decerebrate or decorticate posturing,
    • Recurrent status epilepticus, or
    • Recalcitrant seizures that do not respond while on 3 or more anti-epileptic medications
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
26 participants (estimated)

Study arms

  • Experimental
    Dose-Finding Phase: BBP-812 Dose Level 1 (Cohort 1)

    Participants will receive a single intravenous (IV) infusion of low-dose BBP-812 on Day 0 in the dose-finding phase of the study.

    Biological: AAV9 BBP-812

  • Experimental
    Dose-Finding Phase: BBP-812 Dose Level 2 (Cohort 2)

    Participants will receive a single IV infusion of high-dose BBP-812 on Day 0 in the dose-finding phase of the study.

    Biological: AAV9 BBP-812

  • Experimental
    Enrollment Expansion Phase: BBP-812

    Participants will receive a single IV infusion of BBP-812 at the selected dose from the dose-finding phase on Day 0 in expansion phase of the study.

    Biological: AAV9 BBP-812

Interventions

  • BiologicalAAV9 BBP-812

    Sterile solution for injection for 1-time use via volumetric infusion pump

06

What researchers measure

Primary outcomes

  1. Number of Participants with Adverse Events (AEs)

    Time frame: Baseline up to Week 52

  2. Change from Baseline to 12 Months Post-Infusion in Urine N-acetylaspartate (NAA) Levels

    Time frame: Baseline, Month 12

  3. Change from Baseline to 12 Months Post-Infusion in Central Nervous System (CNS) NAA, as Measured by Magnetic Resonance Spectroscopy (MRS)

    Time frame: Baseline, Month 12

Secondary outcomes

  1. Change from Baseline to Week 52 in Gross Motor Assessment, Gross Motor Function Measure-88

    Time frame: Baseline, Week 52

  2. Change from Baseline to Week 52 in Fine Motor Assessment, Bayley-4

    Time frame: Baseline, Week 52

  3. Change from Baseline to Week 52 in Cognitive Assessment, Bayley-4

    Time frame: Baseline, Week 52

  4. Change from Baseline to Week 52 in Communication Assessment, Bayley-4

    Time frame: Baseline, Week 52

  5. Change from Baseline to Week 52 in Adaptive Function, Vineland-3

    Time frame: Baseline, Week 52

07

Study locations

3 of 4 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Sep 2021 (actual). Primary completion is estimated for Oct 2026, 61 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 5, 2021
First posted
Aug 10, 2021
StartActual
Sep 8, 2021
Primary completionEst.
Oct 13, 2026
CompletionEst.
Oct 8, 2032
Last update
Apr 17, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Apr 17, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04998396
Lead sponsor
Aspa Therapeutics
Responsible party
Sponsor
First posted
Aug 10, 2021
Start date
Sep 8, 2021
Primary completion
Oct 13, 2026 (estimated)
Completion
Oct 8, 2032 (estimated)
Last update
Apr 17, 2026

Study contacts

Alicia Gomez
Contact
CANaspire@aspatx.com
833-764-2267 or 617-861-4617
clinicaltrials@aspatx.com
Contact

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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