Research Study Investigating How Well NDec Works in People With Sickle Cell Disease

Completed · Phase 2 · Has a placebo group

Conditions studied: Sickle Cell Disease

In brief

This study examines how well a new, potential medicine called NDec works and is tolerated in people with sickle cell disease. NDec is a combination of two medicines (decitabine-tetrahydrouridine). Both medicines are new for the treatment of sickle cell disease. Participants who are not taking Hydroxyurea (HU) will get NDec, NDec and placebo, or placebo. Participants who are on HU treatment before joining the study will get NDec, NDec and placebo, or continue on HU. Which treatment participants get is decided by chance. Participants getting NDec and/or Placebo will get capsules to take twice weekly. The study will last for about a year.

Key facts

Study ID

NCT05405114

Run by

Novo Nordisk A/S

People needed

96

Starts

2022-07-07

Expected to finish

2025-07-24

Last updated by the study team

2026-07-22

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• 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 last 12 months prior to the screening visit
• Haemoglobin greater than or equal to 5.0 g/dL and below or equal to 10.5 g/dL at visit 1
• Absolute reticulocyte count above upper limit of the normal (ULN) at visit 1
• Body weight 40 to 125 kg (inclusive).

You may not qualify if…

• Patient is on chronic transfusion therapy as defined by receiving scheduled (pre-planned) series of blood transfusion (simple or exchange) for prophylactic purposes, or the patient is likely to begin chronic transfusion therapy during the course of the trial, or has received RBC or whole blood transfusion for any reason within 28 days of visit 1
• Receipt of erythropoietin or other haematopoietic growth factor treatment within 28 days of signing ICF, or planned treatment with these agents during the trial
• Receipt of voxelotor, crizanlizumab or L-glutamine treatment within 12 weeks of signing the informed consent form, or planned treatment with such agents during the trial
• Platelet count greater than 800 x 10\^9/L at visit 1
• Absolute neutrophil count below or equal to 1.5 x 10\^9/L at visit 1
• Any condition/concurrent chronic disease involving the stomach or small intestine which may affect drug absorption, as per investigator's judgement
• Female who is
• pregnant, breast-feeding or intends to become pregnant within 6 months after the final trial product administration
• child-bearing potential and not using highly effective methods of contraception and whose male partner is not using effective contraception, at screening and until 6 months after the last dose of trial product
• Male with female partner of childbearing potential who does not agree to use condom and whose female partner of childbearing potential is not using a highly effective contraceptive measure from trial start to:
• Six (6) months after the last dose of trial product for patients on NDec/Placebo
• Six (6) months after the last dose of trial product for patients outside US and CA randomised to HU
• Twelve (12) months after the last dose of trial product for patients randomised to HU in US and CA

Where it is running

• Keck Medical Center of USC - Outpatient Clinic — Los Angeles, California, United States
• UCSF Oakland Benioff ChildHosp — Oakland, California, United States
• Center for Inherited Blood Dis — Orange, California, United States
• Harbor-UCLA Medical Center — Torrance, California, United States
• Clinical and Transl Res Center — Aurora, Colorado, United States
• Carole&Ray Neag Comp S.C. Ctr — Farmington, Connecticut, United States
• Tova Community Health Inc — Wilmington, Delaware, United States
• Howard University Hospital Department Med — Washington D.C., District of Columbia, United States
• Howard University — Washington D.C., District of Columbia, United States
• Foundation for Sickle Cell Disease Research — Hollywood, Florida, United States
• University of Florida, College of Medicine Jacksonville — Jacksonville, Florida, United States
• University of Miami Hospital & Clinics — Miami, Florida, United States
• Emory University School Of Med — Atlanta, Georgia, United States
• Aflac Cancer/Blood Dis CCH — Atlanta, Georgia, United States
• Emory University School Of Med — Atlanta, Georgia, United States
• Augusta University — Augusta, Georgia, United States
• Rush University Med. Cntr — Chicago, Illinois, United States
• Univer Of Illinois at Chicago — Chicago, Illinois, United States
• Tulane Sickle Cell Ctr- So LA — Metairie, Louisiana, United States
• Mass General Cancer Center — Boston, Massachusetts, United States
• Wayne State University/University Health Center — Detroit, Michigan, United States
• Children's Hospitals And Clinics Of Minnesota — Minneapolis, Minnesota, United States
• University of Minnesota_Minneapolis_0 — Minneapolis, Minnesota, United States
• Mississippi Center Advanced Medicine — Madison, Mississippi, United States
• University Of South Alabama — Mobile, Alabama, United States

Full record on ClinicalTrials.gov

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