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Cipaglucosidase Alfa

Phase 3

Glycogen Storage Disease Type II Infantile Onset | Monoclonal antibody | Rare Disease |Amicus Therapeutics, Inc.|Trials Updated: Sep 17, 2026

Cipaglucosidase Alfa development status

Highest phase Phase 3
Registered trials 8 across 1 sponsor since Feb 2016

Cipaglucosidase Alfa target and mechanism

Molecular targetGAA
ModalityMonoclonal antibody

Also known as ATB200

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials4
Total Enrollment211

FDA Designations

No designations recorded

Cipaglucosidase Alfa clinical trials

Cipaglucosidase Alfa · 4 trials · 3 indications

Phase 3 3Phase 1 1
NCT04808505A Study to Evaluate the Safety, Efficacy, PK, PD and Immunogenicity of Cipaglucosidase Alfa/Miglustat in IOPD Subjects Aged 0 to <18Glycogen Storage Disease Type II Infantile Onset
RECRUITING36 Analytics
NCT03911505ZIP Study-OL Study of Safety, PK, Efficacy, PD, Immunogenicity of ATB200/AT2221 in Pediatrics Aged 0 to < 18 y.o. w/LOPDPompe Disease (Late-onset)
ACTIVE NOT_RECRUITING21 Analytics
NCT03729362A Study Comparing ATB200/AT2221 With Alglucosidase Alfa/Placebo in Adult Subjects With Late-onset Pompe DiseasePompe Disease (Late-onset)
COMPLETED125 Analytics
PHASE3RECRUITING
A Study to Evaluate the Safety, Efficacy, PK, PD and Immunogenicity of Cipaglucosidase Alfa/Miglustat in IOPD Subjects Aged 0 to <18
Glycogen Storage Disease Type II Infantile OnsetUnlock trial analytics
PHASE3ACTIVE NOT_RECRUITING
ZIP Study-OL Study of Safety, PK, Efficacy, PD, Immunogenicity of ATB200/AT2221 in Pediatrics Aged 0 to < 18 y.o. w/LOPD
Pompe Disease (Late-onset)Unlock trial analytics
PHASE3COMPLETED
A Study Comparing ATB200/AT2221 With Alglucosidase Alfa/Placebo in Adult Subjects With Late-onset Pompe Disease
Pompe Disease (Late-onset)Unlock trial analytics

Study Endpoints

Primary Endpoints

Proportion of subjects with infusion-associated reactions (IARs)
104 weeks
Incidence of treatment-emergent adverse events (TEAEs) from baseline
52 weeks
Change From Baseline to Week 52 in 6 Minute Walk Distance (6MWD)
Baseline, Week 52

The efficacy of cipaglucosidase alfa/miglustat co-administration on ambulatory function was measured by the 6MWT. The 6MWD, measured in meters, is the distance walked on the 6MWT. A greater distance indicated greater endurance. An increase from baseline indicated improvement.

Incidence of Treatment-emergent Adverse Events (TEAEs), Treatment-emergent Serious Adverse Events (TESAEs), and Adverse Events (AEs) Leading to Discontinuation of Study Drug
Stage 3 (2 year treatment) and Stage 4 (Extension) combined, (mean = 71 months on treatment)

Number of subjects with TEAE, TESAE, and AE leading to discontinuation during the 2 year treatment period and extension (Stage 3 and 4 combined)

Plasma Human Acid α-glucosidase (GAA) Activity Levels as Measured by Maximum Observed Plasma Concentration (Cmax).
18 Weeks

Plasma GAA levels (Cmax) measured in Cohorts 1 and 3 following 1st and 3rd doses of cipaglucosidase alfa + miglustat

Plasma GAA Activity Levels as Measured by Time to Reach the Maximum Observed Plasma Concentration (Tmax).
18 Weeks

Plasma GAA levels (Tmax) measured in Cohorts 1 and 3 following 1st and 3rd doses of cipaglucosidase alfa + miglustat

Plasma GAA Activity Levels as Measured by Area Under the Plasma Drug Concentration-time Curve (AUC).
18 Weeks

Plasma GAA levels (AUC) measured in Cohorts 1 and 3 following 1st and 3rd doses of cipaglucosidase alfa + miglustat

Secondary Endpoints

Assessment of pharmacokinetic parameters
52 weeks
Change From Baseline to Week 52 in Sitting Forced Vital Capacity (FVC; % Predicted)
Baseline, Week 52
Change From Baseline to Week 52 in the Manual Muscle Test (MMT) Score for the Lower Extremities
Baseline, Week 52
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Cohort 1: Cipaglucosidase Alfa/Miglustat in ERT-experienced pediatric IOPD subjectsEXPERIMENTALPediatric IOPD subjects 6 months to \<18 years experiencing clinical decline
Cohort 2: Cipaglucosidase Alfa/Miglustat in ERT-naïve pediatric IOPD subjectsEXPERIMENTALPediatric IOPD subjects \<6 months
Cipaglucosidase Alfa (ATB200)/Miglustat(AT2221)EXPERIMENTALParticipants received Cipaglucosidase Alfa (ATB200) co-administered with Miglustat (AT2221) capsule
Cipaglucosidase Alfa/MiglustatEXPERIMENTALParticipants received cipaglucosidase alfa co-administered with miglustat every 2 weeks (Q2W).
Alglucosidase Alfa/PlaceboACTIVE_COMPARATORParticipants received alglucosidase alfa co-administered with placebo Q2W.
ATB200EXPERIMENTALSequential single ascending doses of intravenously infused ATB200 for 3 dosing periods
ATB200 + AT2221EXPERIMENTALATB200 co-administered with AT2221 (Miglustat)

Interventions

NameTypeDescription
Cipaglucosidase alfaBIOLOGICALSterile lyophilized powder intravenous (IV) infusion
MiglustatDRUG65 mg oral capsules
Alglucosidase AlfaBIOLOGICALParticipants received an IV infusion dose over a 4-hour duration Q2W.
PlaceboDRUGMiglustat matching placebo was administered orally 1 hour prior to alglucosidase alfa infusion Q2W.
ATB200DRUG -
AT2221DRUG -
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Eligibility Criteria

Age RangeN/A to 17 Years
SexALL
Healthy VolunteersNo
Study Sites14

Inclusion Criteria: Cohort 1: 1. Male or female subjects who are aged 6 months to \< 18 years on Day 1 2. Subject must have documentation of IOPD genotype 3. Subject must have had hypertrophic cardiomyopathy at the time of diagnosis 4. Subject must have received ERT for at least 6 months immediate...

Countries:United StatesGermanyItalyNetherlandsTaiwanUnited KingdomAustraliaCanadaJapanArgentinaAustriaBelgiumBosnia and HerzegovinaBulgariaDenmarkFranceGreeceHungaryNew ZealandPolandSloveniaSouth KoreaSpainSweden
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Recent Changes (Last 90 Days)

MEDIUMSep 17, 2026NCT03911505primaryCompletionDate: changed
MEDIUMSep 17, 2026NCT03911505primaryCompletionDate: changed

Frequently asked questions about Cipaglucosidase Alfa

What is cipaglucosidase alfa used for?

Cipaglucosidase alfa is an investigational enzyme replacement therapy being developed for Pompe disease, also known as glycogen storage disease type II. It is being studied in two forms of the condition: infantile-onset Pompe disease in patients under 18 years of age and late-onset Pompe disease. It is not yet approved.

What does cipaglucosidase alfa target?

Cipaglucosidase alfa targets acid alpha-glucosidase (GAA), the enzyme that is deficient in Pompe disease. By supplying a recombinant form of this enzyme, the therapy is designed to address the underlying enzyme deficiency that leads to glycogen accumulation in muscle tissue.

Who is developing cipaglucosidase alfa?

Cipaglucosidase alfa is being developed by Amicus Therapeutics, Inc., which trades on the Nasdaq under the ticker FOLD. The company is running the clinical development program for the asset across infantile-onset and late-onset Pompe disease populations.

What phase is cipaglucosidase alfa in?

Cipaglucosidase alfa is in Phase 3 clinical development. It is an investigational therapy and has not been approved by the FDA. The program includes one completed Phase 3 trial, one active trial that is no longer recruiting, and one recruiting Phase 3 study.

What clinical trials is cipaglucosidase alfa in?

Cipaglucosidase alfa has been studied in three Phase 3 trials. NCT03729362 compared it with alglucosidase alfa in adults with late-onset Pompe disease and is completed. NCT03911505 is an open-label pediatric late-onset study that is active but not recruiting. NCT04808505 is recruiting infants and children with infantile-onset disease.

How many patients have been enrolled in cipaglucosidase alfa trials?

Across the three Phase 3 studies, 182 participants have been enrolled. NCT03729362 enrolled 125 adults with late-onset Pompe disease, NCT04808505 is set to enroll 36 patients with infantile-onset disease, and NCT03911505 enrolled 21 pediatric patients with late-onset disease.