l-carnitine as a Potential Additive in Blood Storage Solutions: A Study on Erythrocytes

Area of Science:

• Biochemistry
• Hematology
• Oxidative Stress

Background:

• Erythrocytes (red blood cells) undergo storage lesion during blood banking, reducing their efficacy.
• Oxidative stress is a key factor contributing to erythrocyte storage lesion.
• Antioxidants are explored to mitigate oxidative damage in stored blood products.

Purpose of the Study:

• To investigate the protective effects of L-carnitine (LC) on erythrocytes during prolonged storage.
• To evaluate the impact of different L-carnitine concentrations on erythrocyte biomarkers.

Main Methods:

• Rat erythrocytes were stored for 20 days at 4°C in CPDA-1 solution.
• Erythrocytes were treated with varying concentrations of L-carnitine (10, 30, 60 mM).
• Biomarkers including hemoglobin, hemolysis, antioxidant enzymes (SOD, CAT, GPx), lipid peroxidation (MDA), and protein oxidation were analyzed every five days.

Main Results:

• Hemoglobin and protein sulfhydryl levels remained stable across all groups.
• Superoxide dismutase and malondialdehyde levels showed initial increases followed by decreases.
• Catalase and glutathione peroxidase levels were lower in L-carnitine treated groups compared to controls, indicating LC's role in ROS scavenging. Hemolysis increased, suggesting incomplete protection.
• L-carnitine demonstrated partial protection against oxidative stress by scavenging reactive oxygen species.

Conclusions:

• L-carnitine exhibits antioxidant properties beneficial for stored erythrocytes.
• Complete protection against storage-induced oxidative damage was not achieved with L-carnitine alone.
• Further research into combining L-carnitine with other antioxidants may enhance erythrocyte preservation and efficacy.