for people ages 12 years and up (full criteria)
at Orange, California and other locations
study started
completion around



This Phase 3 study will assess the safety and efficacy of inclacumab, a P-selectin inhibitor, in reducing the frequency of vaso-occlusive crises (VOCs) in approximately 240 adult and adolescent participants (≥ 12 years of age) with sickle cell disease (SCD). Participants will be randomized to receive inclacumab or placebo.

Official Title

A Randomized, Double-blind, Placebo-controlled, Multicenter Study to Assess the Safety and Efficacy of Inclacumab in Participants With Sickle Cell Disease Experiencing Vaso-occlusive Crises


Eligible participants will be administered inclacumab or placebo intravenous (IV) every 12 weeks.

The total duration of treatment for each participant will be 48 weeks.

Participants that complete the study through Week 48 will be provided the opportunity to enroll in an open-label extension (OLE) study.


Sickle Cell Disease, Vaso-occlusive Pain Episode in Sickle Cell Disease, Vaso-occlusive Crisis, blood disorders, hemoglobin, red blood cells, sickle-like shape, mutation in hemoglobin gene, sickle-cell trait, sickle-cell crisis, SCD, Vaso-occlusive Crises, VOC, SCA, RBCs, Sickle Cell Anemia, Inclacumab, inclacumab, 30 mg/kg


You can join if…

Open to people ages 12 years and up

  1. Participant has a confirmed diagnosis of SCD (HbSS, HbSC, HbSB0 thalassemia, or HbSB+ thalassemia genotype).

    Documentation of SCD genotype is required and may be based on documented history of laboratory testing or confirmed by laboratory testing during Screening.

  2. Participant is male or female, ≥ 12 years of age at the time of informed consent.
  3. Participant has experienced between 2 and 10 VOCs within the 12 months prior to the Screening Visit as determined by documented medical history. A prior VOC is defined as an acute episode of pain which:
    • Has no medically determined cause other than a vaso-occlusive event, and
    • Results in a visit to a medical facility (hospital, emergency department, urgent care center, outpatient clinic, or infusion center) or results in a remote contact with a healthcare provider; and
    • Requires parenteral narcotic agents, parenteral nonsteroidal anti- inflammatory drugs (NSAIDs), or an increase in treatment with oral narcotics.
  4. Participants receiving erythropoiesis-stimulating agents (ESA, e.g., erythropoietin [EPO]) must be on a stable dose for at least 90 days prior to the Screening Visit and expected to continue with the stabilized regimen throughout the course of the study.
  5. Participants receiving hydroxyurea (HU), L-glutamine, or voxelotor (Oxbryta®) must be on a stable dose for at least 30 days prior to the Screening Visit and expected to continue with the stabilized regimen throughout the course of the study.

You CAN'T join if...

  1. Participant is receiving regularly scheduled red blood cell (RBC) transfusion therapy (also termed chronic, prophylactic, or preventative transfusion).
  2. Participant is taking or has received crizanlizumab (ADAKVEO®) within 90 days prior to the Screening Visit
  3. Participant weighs > 133 kg (292 lbs.).

    Other protocol-defined Inclusion/Exclusion may apply.


  • UC Irvine Health
    Orange California 92868-3201 United States
  • Phoenix Children's Hospital
    Phoenix Arizona 85016 United States


in progress, not accepting new patients
Start Date
Completion Date
To obtain contact information for a study center near you, click here.
Phase 3 research study
Study Type
About 240 people participating
Last Updated