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JAG201

Phase 1

SHANK3 Haploinsufficiency | Gene therapy | Rare Disease |Jaguar Health, Inc.|Last Updated: Sep 3, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment6

FDA Designations

No designations recorded

Clinical trial landscape

JAG201 · 1 trial · 2 indications

Phase 1 1
NCT06662188JAG201 Gene Therapy Study in Children & Adults With SHANK3 HaploinsufficiencySHANK3 Haploinsufficiency
RECRUITING6 Analytics
PHASE1RECRUITING
JAG201 Gene Therapy Study in Children & Adults With SHANK3 Haploinsufficiency
SHANK3 HaploinsufficiencyUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence of Adverse Events (AEs)
Enrollment to Month 60

Incidence, type, severity, and frequency of AEs

Incidence of Serious Adverse Events (SAEs)
Enrollment to Month 60

Incidence, type, severity, and frequency of SAEs

Clinically significant abnormalities in laboratory values
Enrollment to Month 60

Changes in clinically significant abnormalities in laboratory values

Incidence of immunogenicity response abnormalities
Enrollment to Month 60

Incidence of anti-AAV9 antibodies, anti-transgene antibodies, and T-cell reactivity to transgene over time

Secondary Endpoints

Change from Baseline in SAND
Enrollment to Month 60
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Pediatric Cohort 1EXPERIMENTALStarting Dose
Pediatric Cohort 2EXPERIMENTALEscalated Dose

Interventions

NameTypeDescription
JAG201GENETICAdeno-associated virus 2/9 expressing a miniature version of the human SHANK3 gene (AAV2/9-miniSHANK3)
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Eligibility Criteria

Age Range2 Years to 9 Years
SexALL
Healthy VolunteersNo
Study Sites3

Key Inclusion Criteria: 1. Is male or female, and 2 to 9 years of age at the time of JAG201 administration 2. Has a molecular confirmation of a loss of function mutation in SHANK3 or a 22q13.3 deletion classified as a Class I deletion 3. Has evidence of developmental/cognitive delay of at least 2 s...

Countries:United States
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Recent Changes (Last 90 Days)

LOWSep 3, 2026NCT06662188lastUpdatePostDate: changed
LOWSep 3, 2026NCT06662188lastUpdatePostDate: changed

Frequently asked questions about JAG201

What is JAG201 used for?

JAG201 is an investigational gene therapy being developed for SHANK3 haploinsufficiency, a rare genetic condition that includes Phelan-McDermid syndrome. It is intended for children and adults with this disorder, which is characterized by developmental delays, intellectual disability, and other neurological symptoms.

What does JAG201 target?

JAG201 targets the SHANK3 gene, which is haploinsufficient in the condition it treats. The therapy is designed to address the underlying genetic cause by delivering a functional copy of the SHANK3 gene to patients, potentially restoring normal protein function and alleviating symptoms associated with SHANK3 haploinsufficiency.

Who makes JAG201?

JAG201 is being developed by Jaguar Health, Inc., a biopharmaceutical company traded on NASDAQ under the ticker JAGX. The company is conducting clinical research on this gene therapy candidate for the treatment of SHANK3 haploinsufficiency.

What phase is JAG201 in?

JAG201 is currently in Phase 1 clinical development. It is an investigational drug, meaning it has not yet been approved by regulatory authorities. The ongoing Phase 1 study is actively recruiting participants to evaluate the safety and tolerability of the therapy in patients with SHANK3 haploinsufficiency.

What clinical trials is JAG201 in?

JAG201 is being studied in a Phase 1 clinical trial registered as NCT06662188, titled 'JAG201 Gene Therapy Study in Children & Adults With SHANK3 Haploinsufficiency.' This single-center trial in the United States is recruiting up to 6 participants aged 2 years and older, with no healthy volunteers.

Is JAG201 the same as a treatment for Phelan-McDermid syndrome?

JAG201 is being investigated for SHANK3 haploinsufficiency, which is the genetic cause of Phelan-McDermid syndrome. The ongoing clinical trial includes patients with this syndrome, so JAG201 is a potential treatment for Phelan-McDermid syndrome, though it remains investigational and is not yet approved.