Effect of Broccoli Sprouts Homogenate on SS RBC
- Conditions
- Oxidative StressSickle Red Blood CellFetal Hemoglobin
- Interventions
- Dietary Supplement: Broccosprouts® (Brassica Protection Products LLC) homogenate
- Registration Number
- NCT01715480
- Lead Sponsor
- Duke University
- Brief Summary
The overall purpose of this study is to obtain a better understanding of the biological response of red blood cells to sulforaphane contained in fresh broccoli sprouts that have been put through a blending process. This study will use commercially available fresh broccoli sprouts certified by Brassica Protection Products LLC (BroccoSprouts®). This product can also be purchased at some local grocery stores in the produce section. It is believed that NRF2, a transcription factor encoded by the NFE2L2 gene, plays a role in the regulation of defense against oxidative stress. The detrimental accelerated breakdown of sickle cell disease (SCD) red blood cells (SS RBC) is partially due to reduced anti-oxidative capacity. Previous analysis of SS RBC microRNAs revealed that a reduced level of NRF2, the master regulator of anti-oxidative stress capacity, contributes to reduced resistance to oxidative stress and increased hemolysis; NRF2 also induces fetal hemoglobin (HbF), which is known to prevent SS RBC sickling.
First, erythroid progenitors from normal and SCD subjects will be tested ex-vivo to find out how sulforaphane, a natural NRF2 activator, affects the oxidative stress capacity, HbF expression, and microRNA expression of red cells.
Second, a pilot clinical trial will be conducted to determine the safety and physiological effects of 3 weeks of daily consumption of broccoli sprout homogenate in a cohort of Hb SS/SB0 thalassemia adult SCD patients. During this study, subjects RBCs will be assayed for changes in anti-oxidative stress capacity and microRNA composition in mature SCD red blood cells.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 21
- Diagnosis of Hemoglobin (Hb) SS or Hb Sβ0 thalassemia by electrophoresis
- Age ≥18 years
- Hematocrit (Hct) ≥ 20% and Hb > 6.0 g/dL
- Capacity to understand and sign informed consent and can adhere to the daily regimen of BSH
- RBC transfusion or change in hydroxyurea dose during the 3 months prior to study entry
- Ongoing pregnancy
- Diabetes
- Renal insufficiency (BUN >21 mg/dL and/or Creatinine >1.4 mg/dL)
- History of allergy to sulfonamides
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Broccoli sprout homogenate ingestion Broccosprouts® (Brassica Protection Products LLC) homogenate Subjects will ingest broccoli sprout homogenate in the form of a shake.
- Primary Outcome Measures
Name Time Method In vitro response of HbAA and HbSS erythroid cells to NRF2 activation by sulforaphane. 3 months Erythroid progenitor cells from 3 volunteers with Hb AA and 3 subjects with Hb SS disease will be exposed to sulforaphane and then their expression levels of genes regulated by Nrf2 will be measured.
Safety, physiological effects and cellular effects of daily consumption of broccoli sprout homogenate in a cohort of Hb SS/SB0 thalassemia adult SCD patients 1-2 years Adult subjects with Hb SS/SB0 thalassemia will be recruited to participate in this part of the study. Subjects will be asked to consume broccoli sprout that have been blended into a milkshake-like substance daily for three consecutive weeks. Safety measures will include recording of vital signs and adverse signs and symptoms. Assessment of physiological effects will include measurement of blood chemistries, counts, LDH, and hemoglobin F level. Measurements of cellular effects will include changes in microRNA gene profiling, gene expression profiling, and quantitation of anti-oxidant capacity.
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Duke University Medical Center
🇺🇸Durham, North Carolina, United States