A Study to Assess the Safety and Efficacy of Inclacumab in Participants With Sickle Cell Disease Experiencing Vaso-occlusive Crises
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ClinicalTrials.gov Identifier: NCT04935879 |
Recruitment Status :
Recruiting
First Posted : June 23, 2021
Last Update Posted : November 5, 2021
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Condition or disease | Intervention/treatment | Phase |
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Sickle Cell Disease Vaso-occlusive Pain Episode in Sickle Cell Disease Vaso-occlusive Crisis | Drug: Inclacumab Drug: Placebo | Phase 3 |
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.
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 240 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor) |
Masking Description: | Double blind study |
Primary Purpose: | Treatment |
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 |
Actual Study Start Date : | October 26, 2021 |
Estimated Primary Completion Date : | July 31, 2023 |
Estimated Study Completion Date : | October 31, 2023 |

Arm | Intervention/treatment |
---|---|
Experimental: inclacumab, 30 mg/kg
Participants will receive inclacumab 30 mg/kg administered IV every 12 weeks
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Drug: Inclacumab
Inclacumab will be supplied in single use 10 mL vials at a concentration of 50 mg/mL. One vial contains 500 mg of inclacumab. This is a liquid concentrate for IV infusion. |
Placebo Comparator: placebo
Participants will receive placebo administered IV every 12 weeks.
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Drug: Placebo
Placebo will be supplied in single use 10 mL vials containing the same ingredients without the active drug. Placebo will be prepared as a liquid concentrate for IV infusion and administered in the same manner as active study drug |
- Rate of VOCs during the 48-week treatment period. [ Time Frame: Day 1- Week 48 ]
A VOC is defined as an acute episode of pain that:
- has no medically determined cause other than a vaso-occlusive event, and
- results in a visit to a medical facility (hospitalization, 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 non-steroidal anti-inflammatoroy drugs (NSAIDS), or an increase in treatment with oral narcotics.
Complicated VOCs of acute chest syndrome (ACS), hepatic sequestration, splenic sequestration, and priapism that meet the requirements listed above will be included in the primary endpoint
- Time to first VOC during the 48-week treatment period. [ Time Frame: Day 1- Week 48 ]
- Time to second VOC during the 48-week treatment period Efficacy. [ Time Frame: Day 1- Week 48 ]
- Proportion of participants with no VOCs during the 48-week treatment period. [ Time Frame: Day 1- Week 48 ]
- Rate of VOCs that required admission to a healthcare facility and treatment with parenteral pain medication during the 48-week treatment period. [ Time Frame: Day 1- Week 48 ]Admission includes: (a) A hospital admission, or (b) An admission to an emergency room, observation unit, or infusion center for ≥ 12 hours, or (c) 2 visits to an emergency room, observation unit, or infusion center over a 72-hour period.
- Number of days of inpatient hospitalization for a VOC during the 48-week treatment period. [ Time Frame: Day 1- Week 48 ]
- Incidence of treatment-emergent adverse events (TEAEs). [ Time Frame: Day 1- Week 48 ]
- PD parameter (P-selectin inhibition) [ Time Frame: Day 1- Week 48 ]To characterize the pharmacodynamics (PD) (P-selectin inhibition) of inclacumab at 30 mg/kg
- PD parameter (Platelet Leukocyte Aggregation) [ Time Frame: Day 1- Week 48 ]To characterize the pharmacodynamics (PD) (PLA) of inclacumab at 30 mg/kg

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 12 Years and older (Child, Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
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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.
- Participant is male or female, ≥ 12 years of age at the time of informed consent.
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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.
- 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.
- 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.
Exclusion Criteria:
- Participant is receiving regularly scheduled red blood cell (RBC) transfusion therapy (also termed chronic, prophylactic, or preventative transfusion).
- Participant is taking or has received crizanlizumab (ADAKVEO®) within 90 days prior to the Screening Visit
- Participant weighs > 133 kg (292 lbs.).
Other protocol-defined Inclusion/Exclusion may apply.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04935879
Contact: Carolyn Hoppe, MD | 650-822-8728 | choppe@gbt.com | |
Contact: Eleanor Sales | esales@gbt.com |
United States, Alabama | |
University of South Alabama Children's and Women's Hospital | Not yet recruiting |
Mobile, Alabama, United States, 36604 | |
Contact: Jennifer Williams 251-405-5115 jgwilliams@health.southalabama.edu | |
Principal Investigator: Preethi Marri, MD | |
United States, Arkansas | |
Arkansas Children's Hospital | Not yet recruiting |
Little Rock, Arkansas, United States, 72202 | |
Contact: Carol D'Ann Pierce, RN 501-364-4440 piercecarold@uams.edu | |
Principal Investigator: Carolyn Suzanne Saccente, MD | |
United States, Florida | |
University of South Florida | Not yet recruiting |
Tampa, Florida, United States, 33606 | |
Contact: Emma Gonzalez, BS, CCRP 813-259-8813 egonzal2@health.usf.edu | |
Principal Investigator: Juan Rico, MD | |
United States, Georgia | |
Children's Healthcare of Atlanta at Scottish Rite Hospital | Recruiting |
Atlanta, Georgia, United States, 30342 | |
Contact: Amanda Sanders 404-785-0305 amanda.sanders2@choa.org | |
Principal Investigator: Robert C Brown, MD | |
United States, Illinois | |
University of Illinois at Chicago | Not yet recruiting |
Chicago, Illinois, United States, 60607 | |
Contact: Taif Hassan 312-996-9052 tohassan@uic.edu | |
Principal Investigator: Santosh Saraf, MD | |
United States, Massachusetts | |
Brigham and Women's Hospital | Recruiting |
Boston, Massachusetts, United States, 02115 | |
Contact: Katherine Jolley 671-525-7585 kljolley@bwh.harvard.edu | |
Principal Investigator: Maureen Achebe, MD | |
United States, Michigan | |
University of Michigan | Recruiting |
Ann Arbor, Michigan, United States, 48109 | |
Contact: Bre'Anna Simpson 734-615-4630 sbreanna@med.umich.edu | |
Principal Investigator: Ghada Abusin, MD | |
United States, New York | |
Jacobi Medical Center | Not yet recruiting |
Bronx, New York, United States, 10461 | |
Contact: Sabahete Zegiraj 718-918-6973 zeqirajs@nychhc.org | |
Principal Investigator: Kenneth Rivlin, MD | |
United States, North Carolina | |
Duke University Medical Center | Not yet recruiting |
Durham, North Carolina, United States, 27710 | |
Contact: Lindsey Muller, MSc 919-684-3543 lindsey.muller@duke.edu | |
Principal Investigator: Nirmish Shah, MD | |
United States, Tennessee | |
St Jude Children's Research Hospital | Not yet recruiting |
Memphis, Tennessee, United States, 38105 | |
Contact: Gail Fortner gail.fortner@stjude.org | |
Principal Investigator: Jeremie Estepp, MD | |
Lebanon | |
Nini Hospital | Recruiting |
Tripoli, Lebanon | |
Contact: Kamleh Ibrahim 96170500375 kamleh.ibrahim@hopitalnini.com | |
Principal Investigator: Adlette Inati, MD |
Responsible Party: | Global Blood Therapeutics |
ClinicalTrials.gov Identifier: | NCT04935879 |
Other Study ID Numbers: |
GBT2104-131 2020-005286-13 ( EudraCT Number ) LBCTR2021054791 ( Registry Identifier: Lebanon Clinical Trials Registry ) |
First Posted: | June 23, 2021 Key Record Dates |
Last Update Posted: | November 5, 2021 |
Last Verified: | November 2021 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
blood disorders hemoglobin red blood cells sickle-like shape mutation in hemoglobin gene sickle-cell trait sickle-cell crisis |
Sickle Cell Disease SCD Vaso-occlusive Crises VOC SCA RBCs |
Anemia, Sickle Cell Anemia, Hemolytic, Congenital Anemia, Hemolytic Anemia |
Hematologic Diseases Hemoglobinopathies Genetic Diseases, Inborn |