Crizanlizumab Improves Tissue Oxygen Supply Demand Matching in Patients With Sickle Cell Anemia
SEG101
1 other identifier
interventional
30
0 countries
N/A
Brief Summary
Hypothesis Efficient unloading of oxygen to regions of high metabolic demand requires a healthy microvasculature to sense local oxygen tension and regulate flow, accordingly. In sickle cell disease patients, the investigators have demonstrated oxygen supply-demand mismatch, or SDM, in proportion to anemia severity. SDM occurs in both the peripheral circulation and the brain, and four characteristics: 1) Hyperemia beyond expected for the level of anemia, 2) Corresponding loss of vascular dilatory reserve, 3) Impaired oxygen unloading to the tissues, and 4) Tissue hypoxia. In sickle cell disease, red blood cell (RBC) and white blood cell (WBC) adhere to vascular endothelium triggering transient or irreversible microvascular damage as well as releasing vasoactive substances that contribute to microvascular dysregulation. The investigators postulate that ongoing microvascular damage/dysregulation in the setting of increased total blood flow contributes to SDM. The investigators believe SEG101, by lowering RBC and WBC adhesion to the microvasculature, will improve SDM and tissue oxygenation. Objectives
- Primary - The investigators will test whether SEG101 improves SDM in patients with sickle cell anemia by measuring the change in tissue oxygenation measured by near infrared spectroscopy (NIRS).
- Secondary/Exploratory - The investigators will identify end-organ disease and whether improvement of SDM by SEG101 occurs in patients with sickle cell anemia.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for phase_1
Started Jul 2024
Longer than P75 for phase_1
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
August 31, 2021
CompletedFirst Posted
Study publicly available on registry
July 22, 2022
CompletedStudy Start
First participant enrolled
July 1, 2024
CompletedPrimary Completion
Last participant's last visit for primary outcome
July 1, 2028
ExpectedStudy Completion
Last participant's last visit for all outcomes
July 1, 2029
August 30, 2023
May 1, 2023
4 years
August 31, 2021
August 28, 2023
Conditions
Outcome Measures
Primary Outcomes (1)
The investigators will test whether SEG101 improves Supply-Demand Matching in patients with sickle cell anemia by measuring the change in tissue oxygenation by near infrared spectroscopy from baseline to 3 months and to 6 months.
Tissue oxygenation is measured by near infrared spectroscopy in rSO2%. The investigators will account for changes in microcirculatory perfusion at rest and post-ischemia by laser doppler.
Change measured over a 23 week period
Secondary Outcomes (3)
The investigators will test whether SEG101 improves Supply-Demand Matching in patients with sickle cell anemia by measuring the change in microcirculatory perfusion at rest and post-ischemia
Change measured over a 23 week period
The investigators will test whether SEG101 improves Supply-Demand Matching in patients with sickle cell anemia by measuring the change in venous blood saturation and change in vessel endothelial function
Change measured over a 23 week period
The investigators will test whether SEG101 improves Supply-Demand Matching in patients with sickle cell anemia in the pulmonary vasculature using tricuspid regurgitant jet velocity as an estimate of pulmonary artery pressure.
Change measured over a 23 week period
Study Arms (2)
treatment
EXPERIMENTALThe effects of Crizanlizumab will be assessed in 20 nontransfused SCD subjects. After comprehensive baseline assessment one month prior the time of study initiation, patients will be started on 5mg/kg of body weight to be initiated at week 1 with follow up dosing at week 3 and week 7 then q4weeks until week 23, which will be the last dose given (7 total doses). Safety laboratories will be drawn at each infusion visit. There will be a follow up phone call the day after receiving the medication. Comprehensive blood and vascular testing will be repeated at Week 11 and Week 23 of treatment.
control
ACTIVE COMPARATORA total of 10 SCD subjects will be recruited from the hematology clinic at CHLA, generating a similar distribution of SS and SĂŸ0 hemoglobin. They will be studied twice, once at the beginning of the study, time 0, and once at the end of study, after 6 months. They will undergo the same cerebral, peripheral and cardiopulmonary testing procedures as the patients undergoing therapy. They will also have monthly phone calls to determine clinical outcomes such as crisis frequency, medication use, hospitalizations and other pertinent clinical findings that may arise.
Interventions
patients will be started on 5mg/kg of body weight to be initiated at week 1 with follow up dosing at week 3 and week 7 then q4weeks until week 23, which will be the last dose given (7 total doses).
Eligibility Criteria
You may qualify if:
- We will enroll only SS and SĂŸ0 sickle cell disease patients
- Both male and female will be included.
- Our population of sickle cell disease is 90% African American and 10% Hispanic, therefore, our study population will reflect that distribution of ethnicity.
- Informed consent from legal guardian and/or patient
- Able to participate without needing sedation for MRI scan
- Age at least 16 years
You may not qualify if:
- Any pain crisis requiring an ER visit and/or admission to the hospital and/or required parenteral pain medication in the previous 4 weeks.
- Any acute transfusion in the previous 4 weeks
- Need for chronic transfusion therapy
- Any known chronic illness that in the judgment of the investigator may compromise subject safety or data integrity. These include but are not limited to rheumatologic disorders, malignancy, severe asthma, chronic hepatic or renal insufficiency.
- Known pregnancy
- Seizure disorder
- Inability to cooperate with MRI examinations
- Contraindication to Crizanlizumab
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Children's Hospital Los Angeleslead
- Novartiscollaborator
Related Publications (22)
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PMID: 12426562BACKGROUND
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Study Officials
- PRINCIPAL INVESTIGATOR
Jon Detterich
Children's Hospital Los Angeles
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- phase 1
- Allocation
- NON RANDOMIZED
- Masking
- NONE
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
August 31, 2021
First Posted
July 22, 2022
Study Start
July 1, 2024
Primary Completion (Estimated)
July 1, 2028
Study Completion (Estimated)
July 1, 2029
Last Updated
August 30, 2023
Record last verified: 2023-05