ClinicalTrials.gg
TerminatedNCT03315182MPSIIIBUpdated May 5, 2022

Gene Transfer Clinical Trial for Mucopolysaccharidosis (MPS) IIIB

A Phase 1/2 interventional study of rAAV9.CMV.hNAGLU in Mucopolysaccharidosis Type 3 B, sponsored by Abeona Therapeutics, Inc. Terminated at 4 sites in 4 countries. Per ClinicalTrials.gov, last updated 2022-05-05.

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

Why this study was terminated
Abeona has decided to discontinue development activities for Product ABO-101 due to a lack of drug supply and for business reasons unrelated to the product safety profile and/or signs of efficacy

From the registry’s dates

  • Primary completion was Apr 2022, 4 years 7 months ago, and no results have been posted to the registry.

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Phase
Phase 1/2
Study type
Interventional
Enrollment
11
Allocation
Non-randomized
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 43 studies in Mucopolysaccharidosis III with a site in United States — 12 open to participants now, 15 under way, 4 of them phase 3. Mucopolysaccharidosis III · United States.

Enrollment
14th of 23
11 · median 17
Started
2017
with 1 other
Phase 1/2
10 of 43
2 open now
Registered
21st of 43
by date
Lead sponsor
2 of 43
Abeona Therapeutics, Inc

Among the 43 studies in Mucopolysaccharidosis III with a site in United States, this one is the 14th largest by enrollment of the 23 interventional ones that give a count, is one of 2 that started in 2017, is one of 10 in phase 1/2, and was the 21st registered.

Mucopolysaccharidosis III

58 studies on the registry are indexed under Mucopolysaccharidosis III; 16 are open to participants now.

Browse Mucopolysaccharidosis III studies →

Open to participants now

12 of the 43 studies in Mucopolysaccharidosis III with a site in United States are open now. Recruiting first, the newest first:

7 more — sign in →

All 12 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 8 Mucopolysaccharidosis III studies recruiting now, 5 set no upper age limit and 1 stops at 75 or younger; 7 take children under 18; none take healthy volunteers.

This study: all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 43 studies in Mucopolysaccharidosis III with a site in United States, or all of them as a file.
02

Study summary

Open-label, dose-escalation clinical trial of rAAV9.CMV.hNAGLU injected intravenously through a peripheral limb vein

Read the detailed description

Adeno-associated virus serotype 9 carrying the human NAGLU gene under the control of a CMV enhancer/promoter (rAAV9.CMV.hNAGLU) will be delivered one-time through a venous catheter inserted into a peripheral limb vein. A tapering course of prophylactic enteral prednisone or prednisolone will be administered for a period of at least two months.

03

Conditions studied

  • Mucopolysaccharidosis Type 3 B

Keywords

  • MPS IIIB
  • Sanfilippo Syndrome B
04

Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Confirmed diagnosis of MPSIIIB by both of the following two methods:

    • No detectable or significantly reduced NAGLU enzyme activity by plasma.
    • Genomic DNA analysis demonstrating homozygous or compound heterozygous mutations in the NAGLU gene
  • Age: From Birth to 2 years or children older than 2 years with a minimum cognitive Development Quotient (DQ) of 60 or above (calculated by Bayley Scales of Infant and Toddler Development - Third Edition)

Exclusion criteria

Exclusion Criteria:

  • Inability to participate in the clinical evaluation as determined by Principal Investigator
  • Identification of two nonsense or null variants on genetic testing of the NAGLU gene
  • Has evidence of an attenuated phenotype of MPS IIIB
  • Presence of a concomitant medical condition that precludes lumbar puncture or use of anesthetics
  • Active viral infection based on clinical observations as infections by Adenoviruses, Epstein-Barr Virus, Cytomegalovirus, Respiratory Syncytial Virus
  • Concomitant illness or requirement for chronic drug treatment that in the opinion of the PI creates unnecessary risks for gene transfer , or precludes the child from participating in the protocol assessments and follow up as diseases requiring , such as juvenile rheumatoid arthritis or idiopathic thrombocytopenia purpura
  • Subjects with total anti-AAV9 antibody titers ≥ 1:100 as determined by ELISA binding immunoassay
  • Subjects with a positive response for the ELISPOT for T-cell responses to AAV9
  • Serology consistent with exposure to , or serology consistent with active or C infection
  • Bleeding disorder or any other medical condition or circumstance in which a lumbar puncture (for collection of CSF) is according to local institutional policy
  • Visual or hearing impairment sufficient to preclude cooperation with neurodevelopmental testing
  • Uncontrolled seizure disorder
  • Any item (braces, etc.) which would exclude the subject from being able to undergo MRI according to local institutional policy
  • Any other situation that precludes the subject from undergoing procedures required in this study
  • Subjects with cardiomyopathy or significant congenital heart abnormalities
  • The presence of significant non-MPS IlIB related CNS impairment or behavioral disturbances that would confound the scientific rigor or interpretation of results of the study
  • Abnormal laboratory values Grade 2 or higher as defined in v4.0 for GGT, total , creatinine, , WBC count, count, PT and
  • Female participant who is pregnant or demonstrates a positive urine or serum result at screening assessment (if applicable).
  • Any vaccination with viral attenuated vaccines less than 30 days prior to the scheduled date of treatment (and use of prednisolone)
  • Previous treatment by Haematopoietic Stem Cell transplantation
  • Previous participation in a gene/cell therapy or ERT clinical trial
Terms in these criteria, in plain language(10)

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.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

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.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

CTCAE grade

The US National Cancer Institute’s scale of how severe an adverse event is — any unwanted medical event during a study, such as a symptom, an illness or an abnormal test result, whether or not a treatment caused it. Whether it did is judged separately.

1
Mild.
2
Moderate.
3
Severe.
4
Life-threatening.
5
Death due to the event.

“Side effects of earlier treatment resolved to grade 1 or less” means they have settled to mild or gone.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

INR, PT and aPTT (clotting tests)

Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.

Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.

05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Single group
Masking
None (open label)
Enrollment
11 participants (actual)

Study arms

  • Experimental
    Cohort 1 (Low Dose) rAAV9.CMV.hNAGLU

    Subjects will receive a single infusion: • Cohort 1 (Low Dose): 2 X 10E13 vg/kg (n=2 participants)

    Biological: rAAV9.CMV.hNAGLU

  • Experimental
    Cohort 2 (Med Dose) rAAV9.CMV.hNAGLU

    Subjects will receive a single infusion: • Cohort 2 (Med Dose): 5 X 10E13 vg/kg (n=4-5 participants)

    Biological: rAAV9.CMV.hNAGLU

  • Experimental
    Cohort 3 (High Dose) rAAV9.CMV.hNAGLU

    Subjects will receive a single infusion: • Cohort 3 (High Dose): 1 X 10E14 vg/kg (n=4-8 participants)

    Biological: rAAV9.CMV.hNAGLU

Interventions

  • BiologicalrAAV9.CMV.hNAGLU

    Adeno-associated virus serotype 9 carrying the human NAGLU gene under the control of a CMV enhancer/promoter (rAAV9.CMV.hNAGLU) will be delivered one-time through a venous catheter inserted into a peripheral limb vein.

06

What researchers measure

Primary outcomes

  1. Change from baseline in the Age Equivalent Developmental score (calculated by the Mullen Scales of Early Learning or the Kaufman Assessment Battery for Children Second Edition, based on developmental age) compared with Natural History Study data

    Time frame: 24 months

  2. Product safety as defined by the incidence, type and severity of treatment-related adverse events and serious adverse events

    Time frame: 24 Months

Secondary outcomes

  1. Change from baseline of central spinal fluid heparan sulfate after treatment

    Time frame: 24 months

  2. Change from baseline of plasma or urine glycosaminoglycans or heparan sulfate after treatment

    Time frame: 24 Months

  3. Change from baseline in CSF or plasma NAGLU enzyme activity levels after treatment

    Time frame: 24 Months

  4. Change from baseline in liver and/or spleen volumes after treatment, as measured by magnetic resonance imaging

    Time frame: 24 Months

  5. Change from baseline in brain volumes after treatment, as measured by magnetic resonance imaging

    Time frame: 24 Months

  6. Change from baseline in the Cognitive Age Equivalent (Developmental Age) compared to Natural History Study, calculated using the Bayley Scales of Infant and Toddler Development or the Kaufman Assessment Battery for Children

    Time frame: 24 Months

  7. Change from baseline in the Adaptive Age Equivalent score after treatment compared to Natural History Study data, as assessed by parent report using the Vineland Adaptive Behavior Scale II Survey form

    Time frame: 24 Months

  8. Change from baseline Developmental Quotient after treatment compared to Natural History Study data assessed by the Mullen Scales of Early Learning or the Kaufman Assessment Battery for Children.

    Time frame: 24 Months

  9. Change from baseline in Pediatric Quality of Life Inventory (PedsQL™) Generic Core Scales total score

    Time frame: 24 Months

  10. Change from baseline in parent quality of life, using the Parenting Stress Index, 4th Edition (PSI-4) short form

    Time frame: 24 Months

  11. Determination of vector shedding analysis in plasma, saliva, urine and feces will provide preliminary data for the Environmental Risk Assessment

    Time frame: 24 Months

07

Study locations

4 sites
  • Nationwide Children's Hospital
    Columbus, Ohio 43205, United States
  • Armand-Trousseau Hospital
    Paris, France
  • University Hospital Hamburg-Eppendorf
    Hamburg, Germany
  • Hospital Clinico Universitario de Santiago
    Santiago De Compostela, 15706, Spain
08

References and documents

Publications

  • Fu H, Dirosario J, Killedar S, Zaraspe K, McCarty DM. Correction of neurological disease of mucopolysaccharidosis IIIB in adult mice by rAAV9 trans-blood-brain barrier gene delivery. Mol Ther. 2011 Jun;19(6):1025-33. doi: 10.1038/mt.2011.34. Epub 2011 Mar 8. PubMed 21386820 ↗
  • Truxal KV, Fu H, McCarty DM, McNally KA, Kunkler KL, Zumberge NA, Martin L, Aylward SC, Alfano LN, Berry KM, Lowes LP, Corridore M, McKee C, McBride KL, Flanigan KM. A prospective one-year natural history study of mucopolysaccharidosis types IIIA and IIIB: Implications for clinical trial design. Mol Genet Metab. 2016 Nov;119(3):239-248. doi: 10.1016/j.ymgme.2016.08.002. Epub 2016 Aug 18. PubMed 27590925 ↗
  • Neufeld EF, Cantz MJ. Corrective factors for inborn errors of mucopolysaccharide metabolism. Ann N Y Acad Sci. 1971 Jul 6;179:580-7. doi: 10.1111/j.1749-6632.1971.tb46934.x. No abstract available. PubMed 4255108 ↗
  • Weber B, Guo XH, Kleijer WJ, van de Kamp JJ, Poorthuis BJ, Hopwood JJ. Sanfilippo type B syndrome (mucopolysaccharidosis III B): allelic heterogeneity corresponds to the wide spectrum of clinical phenotypes. Eur J Hum Genet. 1999 Jan;7(1):34-44. doi: 10.1038/sj.ejhg.5200242. PubMed 10094189 ↗
  • Wijburg FA, Wegrzyn G, Burton BK, Tylki-Szymanska A. Mucopolysaccharidosis type III (Sanfilippo syndrome) and misdiagnosis of idiopathic developmental delay, attention deficit/hyperactivity disorder or autism spectrum disorder. Acta Paediatr. 2013 May;102(5):462-70. doi: 10.1111/apa.12169. Epub 2013 Feb 6. PubMed 23336697 ↗
  • de Ruijter J, Valstar MJ, Wijburg FA. Mucopolysaccharidosis type III (Sanfilippo Syndrome): emerging treatment strategies. Curr Pharm Biotechnol. 2011 Jun;12(6):923-30. doi: 10.2174/138920111795542651. PubMed 21235449 ↗
  • Murrey DA, Naughton BJ, Duncan FJ, Meadows AS, Ware TA, Campbell KJ, Bremer WG, Walker CM, Goodchild L, Bolon B, La Perle K, Flanigan KM, McBride KL, McCarty DM, Fu H. Feasibility and safety of systemic rAAV9-hNAGLU delivery for treating mucopolysaccharidosis IIIB: toxicology, biodistribution, and immunological assessments in primates. Hum Gene Ther Clin Dev. 2014 Jun;25(2):72-84. doi: 10.1089/humc.2013.208. Epub 2014 Apr 10. PubMed 24720466 ↗
  • Ribera A, Haurigot V, Garcia M, Marco S, Motas S, Villacampa P, Maggioni L, Leon X, Molas M, Sanchez V, Munoz S, Leborgne C, Moll X, Pumarola M, Mingozzi F, Ruberte J, Anor S, Bosch F. Biochemical, histological and functional correction of mucopolysaccharidosis type IIIB by intra-cerebrospinal fluid gene therapy. Hum Mol Genet. 2015 Apr 1;24(7):2078-95. doi: 10.1093/hmg/ddu727. Epub 2014 Dec 18. PubMed 25524704 ↗
  • Hamano K, Hayashi M, Shioda K, Fukatsu R, Mizutani S. Mechanisms of neurodegeneration in mucopolysaccharidoses II and IIIB: analysis of human brain tissue. Acta Neuropathol. 2008 May;115(5):547-59. doi: 10.1007/s00401-007-0325-3. Epub 2007 Dec 4. PubMed 18060551 ↗
  • Tamagawa K, Morimatsu Y, Fujisawa K, Hara A, Taketomi T. Neuropathological study and chemico-pathological correlation in sibling cases of Sanfilippo syndrome type B. Brain Dev. 1985;7(6):599-609. doi: 10.1016/s0387-7604(85)80008-5. PubMed 3938624 ↗
  • Mingozzi F, High KA. Immune responses to AAV in clinical trials. Curr Gene Ther. 2011 Aug;11(4):321-30. doi: 10.2174/156652311796150354. PubMed 21557723 ↗
  • Saeki I, Tokunaga S, Matsuura T, Hayashida M, Yanagi Y, Taguchi T. A formula for determining the standard liver volume in children: a special reference for neonates and infants. Pediatr Transplant. 2012 May;16(3):244-9. doi: 10.1111/j.1399-3046.2011.01624.x. Epub 2011 Dec 12. PubMed 22151603 ↗
  • Schlesinger AE, Edgar KA, Boxer LA. Volume of the spleen in children as measured on CT scans: normal standards as a function of body weight. AJR Am J Roentgenol. 1993 May;160(5):1107-9. doi: 10.2214/ajr.160.5.8470587. PubMed 8470587 ↗
  • Malm G, Mansson JE. Mucopolysaccharidosis type III (Sanfilippo disease) in Sweden: clinical presentation of 22 children diagnosed during a 30-year period. Acta Paediatr. 2010 Aug;99(8):1253-7. doi: 10.1111/j.1651-2227.2010.01800.x. Epub 2010 Mar 14. PubMed 20337777 ↗
  • Dale DC, Fauci AS, Guerry D IV, Wolff SM. Comparison of agents producing a neutrophilic leukocytosis in man. Hydrocortisone, prednisone, endotoxin, and etiocholanolone. J Clin Invest. 1975 Oct;56(4):808-13. doi: 10.1172/JCI108159. PubMed 1159089 ↗
  • Summers C, Rankin SM, Condliffe AM, Singh N, Peters AM, Chilvers ER. Neutrophil kinetics in health and disease. Trends Immunol. 2010 Aug;31(8):318-24. doi: 10.1016/j.it.2010.05.006. PubMed 20620114 ↗
  • McCurdy VJ, Johnson AK, Gray-Edwards HL, Randle AN, Bradbury AM, Morrison NE, Hwang M, Baker HJ, Cox NR, Sena-Esteves M, Martin DR. Therapeutic benefit after intracranial gene therapy delivered during the symptomatic stage in a feline model of Sandhoff disease. Gene Ther. 2021 Apr;28(3-4):142-154. doi: 10.1038/s41434-020-00190-1. Epub 2020 Sep 3. PubMed 32884151 ↗

Individual participant data

Plan to share: No — There is no plan to share data

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Oct 2017 to primary completion in Apr 2022, 53 months.

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

Registered
Oct 10, 2017
First posted
Oct 20, 2017
StartActual
Oct 16, 2017
Primary completionActual
Apr 7, 2022
CompletionActual
Apr 7, 2022
Last update
May 5, 2022
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 May 5, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03315182
Lead sponsor
Abeona Therapeutics, Inc
Responsible party
Sponsor
First posted
Oct 20, 2017
Start date
Oct 16, 2017
Primary completion
Apr 7, 2022
Completion
Apr 7, 2022
Last update
May 5, 2022

Oversight

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

Not currently enrolling

This study is terminated, as verified in Apr 2022. You cannot join it, but the record below documents what was studied.

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