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A Phase 3, Double-blind, Placebo-controlled, Randomized Withdrawal Study to Evaluate the Efficacy and Safety of SYNB1934 in Patients with PKU (SYNPHENY-3)

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2022-502932-37-00
Acronym
SYNB1934-CP-003
Enrollment
11
Registered
2024-01-16
Start date
Unknown
Completion date
2024-02-08
Last updated
2024-01-16

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Phenylketonuria

Brief summary

Part 1: Percent change from baseline in blood Phe level at last measurement of the individually titrated dose (iTD) of SYNB1934v1, Part 2: Change from baseline to Week 4 in blood Phe level, Part 3: Incidence and severity of adverse events, Part 3: Changes from DEP baseline in clinical laboratory parameters, Part 3: Changes from DEP baseline in vital signs measurements

Detailed description

Part 1: Change from baseline in blood Phe level at last measurement of the iTD of SYNB1934v1, Part 1: A ≥ 20% reduction from baseline in blood Phe level at any time in the DEP, Part 1: Blood Phe level ≤ 360 μmol/L at any time of the iTD of SYNB1934v1, Part 1: Blood Phe level ≤ 360 μmol/L at any time in the DEP, Part 1: Incidence and severity of adverse events, Part 1: Changes from baseline in clinical laboratory parameters, Part 1: Changes from baseline in vital signs measurements, Part 2: Percent change from DEP baseline in blood Phe level at Week 4, Part 2: Change from DEP baseline to Week 4 in blood Phe level, Part 2: Blood Phe level ≤ 360 μmol/L at Week 4, Part 2: Incidence and severity of adverse events, Part 2: Changes from baseline in clinical laboratory parameters, Part 2: Change from baseline in vital signs measurements, Part 2: A ≥ 20% reduction from DEP baseline in blood Phe level at Week 4, Part 3: Change from DEP baseline in blood Phe levels, Part 3: Blood Phe level ≤ 360 μmol/L, Part 3: Change from DEP baseline in blood Phe levels over time, Part 3: Change from DEP baseline in blood Phe level over time until first protocol-specified increase in dietary protein intake, Part 3: Change from DEP baseline in dietary Phe intake.

Interventions

DRUGONDANSETRON
DRUGESOMEPRAZOLE
DRUGPlacebo to match SYNB1934v1

Sponsors

Synlogic Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
0 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Part 1: Percent change from baseline in blood Phe level at last measurement of the individually titrated dose (iTD) of SYNB1934v1, Part 2: Change from baseline to Week 4 in blood Phe level, Part 3: Incidence and severity of adverse events, Part 3: Changes from DEP baseline in clinical laboratory parameters, Part 3: Changes from DEP baseline in vital signs measurements

Secondary

MeasureTime frame
Part 1: Change from baseline in blood Phe level at last measurement of the iTD of SYNB1934v1, Part 1: A ≥ 20% reduction from baseline in blood Phe level at any time in the DEP, Part 1: Blood Phe level ≤ 360 μmol/L at any time of the iTD of SYNB1934v1, Part 1: Blood Phe level ≤ 360 μmol/L at any time in the DEP, Part 1: Incidence and severity of adverse events, Part 1: Changes from baseline in clinical laboratory parameters, Part 1: Changes from baseline in vital signs measurements, Part 2: Percent change from DEP baseline in blood Phe level at Week 4, Part 2: Change from DEP baseline to Week 4 in blood Phe level, Part 2: Blood Phe level ≤ 360 μmol/L at Week 4, Part 2: Incidence and severity of adverse events, Part 2: Changes from baseline in clinical laboratory parameters, Part 2: Change from baseline in vital signs measurements, Part 2: A ≥ 20% reduction from DEP baseline in blood Phe level at Week 4, Part 3: Change from DEP baseline in blood Phe levels, Part 3: Blood Phe level ≤ 360

Countries

Denmark

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026