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Double-blind, randomized, multicenter phase 2 study of SC411 in children with sickle cell disease (SCOT trial)

key information

source: Blood Advances

year: 2018

authors: Daak AA, Dampier CD, Fuh B, Kanter J, Alvarez OA, Black LV, McNaull MA, Callaghan MU, George A, Neumayr L, Hilliard LM, Sancilio F, Rabinowicz AL, Heeney MM

summary/abstract:

Blood cell membranes in sickle cell disease (SCD) have low docosahexaenoic acid (DHA). DHA treatment reduces sickle cell crisis (SCC) rate and ameliorates the inflammation, oxidative stress, and hypercoagulable state of SCD.

SC411 is a novel DHA ethyl ester formulation with a proprietary delivery platform (Advanced Lipid Technology) that enhances DHA bioavailability. The SCOT trial investigated the effect of 3 different doses of SC411 on clinical and biochemical endpoints in 67 children with SCD (5-17 years old). Seventy-six percent of subjects were also receiving hydroxyurea. After 4 weeks of treatment with SC411 at 20, 36, and 60 mg DHA/kg per day or placebo a statistically significant (P < .001) mean percentage increase of blood cell membrane DHA and eicosapentaenoic acid was seen vs baseline: 109.0% (confidence interval [CI], 46.7-171.3), 163.8% (CI, 108.3-219.2), 170.8% (CI, 90.2-251.4), and 28.6% (CI, 250.1 to 107.3), respectively.

After 8 weeks of treatment, statistically significant changes vs placebo were also observed in D-dimer (P = .025) and soluble E-selectin (P = .0219) in subjects exposed to 36 mg/kg. A significant increase in hemoglobin was observed against placebo in subjects receiving 20 mg DHA/kg per day (P = .039). SC411 significantly reduced electronic diary recorded SCC, analgesic use at home, and days absent from school because of sickle cell pain. The lower rate of clinical SCC observed in the pooled active groups vs placebo did not reach statistical significance (rate ratio, 0.47; 95% CI, 0.20-1.11; P = .07). All tested doses were safe and well tolerated. This trial was registered at www.clinicaltrials.gov as #NCT02973360.

organization: Sancilio Pharmaceuticals Company, Inc., USA; Emory University School of Medicine, USA; East Carolina University, USA; Medical University of South Carolina, USA; University of Miami, USA; University of Florida College of Medicine, USA; University of Mississippi Medical Center, USA; Children's Hospital of Michigan, USA; Texas Children's Hospital, USA; University of California, USA; University of Alabama at Birmingham, USA; Boston Children's Hospital, Harvard Medical School, USA

DOI: 10.1182/bloodadvances.2018021444

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