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SYNB1618

Phase 2

Phenylketonuria | Small molecule | Rare Disease |Synlogic, Inc.|Last Updated: Oct 17, 2022

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment90
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04534842Efficacy and Safety of SYNB1618 and SYNB1934 in Adult Patients With PhenylketonuriaPHASE2 COMPLETED 20Aug 25, 2020Oct 7, 2022Oct 17, 202211 United States
NCT03516487Safety and Tolerability of SYNB1618 in Healthy Adult Volunteers and Adult Subjects With PhenylketonuriaPHASE1 COMPLETED 70Apr 17, 2018Jun 21, 2019May 13, 20214 United States
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Study Endpoints
Primary Endpoints
Changes from baseline in labeled Phe (D5-Phe) in plasma
Day 14

The primary efficacy outcome will be assessed by measuring change from baseline in plasma D5-Phe AUC over 24 hours after D5-Phe administration

Number of Subjects With Treatment-Emergent Adverse Events
Up to 4 months

Toxicity is graded in accordance with the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE), version 4.03. Adverse events (AEs) are reported based on clinical laboratory tests, vital sign and weight measurements, physical examinations, electrocardiograms, and any other medically indicated assessments, including subject interviews, from the time informed consent is signed through the end of the safety follow-up period. AEs are considered to be treatment emergent (TEAE) if they occur or worsen in severity after the first dose of study treatment. TEAEs are considered treatment-related if relationship to study drug is possibly related, probably related, or definitely related.

Secondary Endpoints
Changes from baseline in fasting levels of plasma Phe
Day 14
Incidence of Treatment-Emergent Adverse Events
Day 43
Clearance of SYNB1618 From Feces
Up to 4 months
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
SYNB1618EXPERIMENTALDose ramp of SYNB1618
SYNB1934EXPERIMENTALDose ramp of SYNB1934
SAD HV: SYNB1618 (1 x 10^10 CFU)EXPERIMENTALHV subjects receive a single oral dose of SYNB1618 (1 x 10\^10 colony-forming units \[CFU\]) in a chilled buffered solution on Day 1 in the SAD study (Part 1).
SAD HV: SYNB1618 (5 x 10^10 CFU)EXPERIMENTALHV subjects receive a single oral dose of SYNB1618 (5 x 10\^10 CFU) in a chilled buffered solution on Day 1 in the SAD study (Part 1).
SAD HV: SYNB1618 (1 x 10^11 CFU)EXPERIMENTALHV subjects receive a single oral dose of SYNB1618 (1 x 10\^11 CFU) in a chilled buffered solution on Day 1 in the SAD study (Part 1).
SAD HV SB: SYNB1618 (1 x 10^11 CFU)EXPERIMENTALHV subjects receive a single oral dose of SYNB1618 (1 x 10\^11 CFU) in a chilled buffered solution on Day 1 in the SAD study (Part 1). On Day 1, subjects in this cohort receive a solid breakfast (SB) that contains approximately the same amount of calories and protein as the meal supplement shake given to subjects in the other SAD cohorts.
SAD HV: SYNB1618 (2 x 10^11 CFU)EXPERIMENTALHV subjects receive a single oral dose of SYNB1618 (2 x 10\^11 CFU) in a chilled buffered solution on Day 1 in the SAD study (Part 1).
SAD HV: SYNB1618 (5 x 10^11 CFU)EXPERIMENTALHV subjects receive a single oral dose of SYNB1618 (5 x 10\^11 CFU) in a chilled buffered solution on Day 1 in the SAD study (Part 1).
SAD HV: PlaceboPLACEBO_COMPARATORHV subjects receive a single oral dose of placebo in a chilled buffered solution on Day 1 in the SAD study (Part 1).
SAD PKU: SYNB1618 (7 x 10^10 CFU)EXPERIMENTALSubjects with PKU receive a single oral dose of SYNB1618 (7 x 10\^10 CFU) in a chilled buffered solution on Day 1 in the SAD study (Part 1).
SAD PKU: PlaceboPLACEBO_COMPARATORHV subjects receive a single oral dose of placebo in a chilled buffered solution on Day 1 in the SAD study (Part 1).
MAD HV: SYNB1618 (1 x 10^10 CFU)EXPERIMENTALHV subjects receive oral SYNB1618 (1 x 10\^10 CFU) in a chilled buffered solution 3 times per day (TID) for 7 days in the MAD study (Part 2).
MAD HV: SYNB1618 (5 x 10^10 CFU)EXPERIMENTALHV subjects receive oral SYNB1618 (5 x 10\^10 CFU) in a chilled buffered solution TID for 7 days in the MAD study (Part 2).
MAD HV: SYNB1618 (7 x 10^10 CFU)EXPERIMENTALHV subjects receive oral SYNB1618 (7 x 10\^10 CFU) in a chilled buffered solution TID for 7 days in the MAD study (Part 2).
MAD HV: SYNB1618 (1 x 10^11 CFU)EXPERIMENTALHV subjects receive oral SYNB1618 (1 x 10\^11 CFU) in a chilled buffered solution TID for 7 days in the MAD study (Part 2).
MAD HV: PlaceboPLACEBO_COMPARATORHV subjects receive oral placebo in a chilled buffered solution TID for 7 days in the MAD study (Part 2).
MAD PKU: SYNB1618 (7 x 10^10 CFU)EXPERIMENTALSubjects with PKU receive oral SYNB1618 (7 x 10\^10 CFU) in a chilled buffered solution TID for 7 days in the MAD study (Part 2).
MAD PKU: PlaceboPLACEBO_COMPARATORSubjects with PKU receive oral placebo in a chilled buffered solution TID for 7 days in the MAD study (Part 2).
Interventions
NameTypeDescription
SYNB1618DRUG15-day dose-ramp regimen (4 dose levels) of orally administered SYNB1618
SYNB1934DRUG15-day dose-ramp regimen (4 dose levels) of orally administered SYNB1934
PlaceboDRUGSubjects receive placebo orally in a chilled buffered solution (100 mL).
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites11

Inclusion Criteria: 1. Age ≥ 18 years. 2. Able and willing to voluntarily complete the informed consent process. 3. Diagnosis of classic PKU based on medical history as assessed by the investigator (e.g., Phe concentration of \>1200 µmol/L at any time, low dietary Phe tolerance, or genetic diagnosi...

Countries:United States
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Competitive Landscape -Phenylketonuria 12 trials