Red Blood Cell Vitamin C Concentration and Its Effect on Deformability in Pediatric Sickle Cell Disease

Area of Science:

• Hematology
• Nutritional Biochemistry
• Pediatric Medicine

Background:

• Red blood cell rigidity is a hallmark of sickle cell disease (SCD).
• The role of oxidative stress and vitamin C in red blood cell (RBC) deformability in SCD is not well understood.
• Investigating vitamin C levels and its impact on RBC function in pediatric SCD is crucial.

Purpose of the Study:

• To compare RBC vitamin C concentrations in pediatric SCD patients versus healthy controls.
• To develop and test a method for increasing RBC vitamin C levels in SCD.
• To evaluate the effect of elevated RBC vitamin C on RBC deformability in pediatric SCD.

Main Methods:

• Measured RBC vitamin C concentrations in pediatric SCD patients (n=43) and healthy controls (n=23).
• Developed a protocol to load vitamin C into sickle cell RBCs.
• Assessed the impact of vitamin C loading on RBC deformability.

Main Results:

• Pediatric SCD patients exhibited significantly lower RBC vitamin C concentrations (20.5 μM) compared to healthy controls (51.7 μM).
• Successful loading of vitamin C into sickle cell RBCs was achieved.
• Elevated RBC vitamin C levels showed minimal effect on RBC deformability.

Conclusions:

• Vitamin C deficiency may be present in pediatric SCD.
• While vitamin C can be loaded into sickle cells, it does not significantly improve deformability.
• Further research is needed to clarify the clinical significance of vitamin C deficiency in pediatric SCD.