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NDec - decitabine-tetrahydrouridine

Phase 2

Sickle Cell Disease | Small molecule | Hematology |Novo Nordisk A/S|Last Updated: Dec 30, 2025

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 Trials1
Total Enrollment96
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05405114Research Study Investigating How Well NDec Works in People With Sickle Cell DiseasePHASE2 COMPLETED 96Jul 7, 2022Jul 24, 2025Dec 30, 202569 United States, Canada +10
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Study Endpoints
Primary Endpoints
Change in total haemoglobin
From baseline (week 0) to week 24

measured in g/dL

Secondary Endpoints
Cmax for decitabine from pharmacokinetic assessment
At week 24
Cmax for tetrahydrouridine from pharmacokinetic assessment
At week 24
Change in DNA methyltransferase 1 (DNMT1) activity
From baseline (week 0) to week 24
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
HU-non-eligible - NDec plus placeboEXPERIMENTALHU-non eligible patients randomised to treatment with NDec on one day and placebo on the other day
HU-non-eligible - NDec plus NDecEXPERIMENTALHU-non eligible patients randomised to treatment with NDec on both days
HU-non-eligible - Placebo plus placeboPLACEBO_COMPARATORHU-non eligible patients randomised to treatment with placebo on both days
HU-active - NDec plus placeboEXPERIMENTALHU-active patients randomised to treatment with NDec on one day and placebo on the other day
HU-active - NDec plus NDecEXPERIMENTALHU-active patients randomised to treatment with NDec on both days
HU-active - HUACTIVE_COMPARATORHU-active patients randomised to continue on open-label HU treatment
Interventions
NameTypeDescription
NDec - oral decitabine-tetrahydrouridineDRUGParticipants will get capsules (oral administration) to take once or twice weekly. The number of capsules will be based on their body weight
HU - HydroxyureaDRUGParticipants will get capsules daily (oral administration) according to local labelling
PlaceboDRUGParticipants will get capsules (oral administration) to take once or twice weekly. The number of capsules will be based on their body weight
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites69

Inclusion Criteria: * Age above or equal to 18 years at the time of signing informed consent * Confirmed diagnosis of SCD (including HbSS, HbSC, HbSβ0 thalassaemia and HbSβ+ thalassaemia or other Sickle Cell disease variants) * 2-10 episodes of documented vaso-occlusive crisis (VOCs) within the las...

Countries:United StatesCanadaFranceGreeceIndiaItalyLebanonOmanSouth AfricaSpainTurkey (Türkiye)United Kingdom
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