Erythrocyte (RBC) (RBC)

Erythrocytes, commonly known as red blood cells (RBCs), are the most abundant cell type in the human body and serve as the primary vehicle for transporting oxygen from the lungs to tissues and carbon dioxide back to the lungs [1, 15]. These cells are uniquely specialized for their role, lacking a nucleus and most organelles to maximize hemoglobin content and maintaining a flexible biconcave shape that allows them to navigate the narrowest capillaries [8, 15, 21]. In therapeutic development, erythrocytes are considered targets for conditions such as sickle cell disease, where drugs like voxelotor modulate hemoglobin oxygen affinity, or malaria, where antiparasitic agents clear infections within the red cell environment [2, 17, 23]. Furthermore, erythrocytes are increasingly utilized as drug delivery "supercarriers," where therapeutic agents like enzymes or anti-inflammatory drugs are encapsulated within or conjugated to the cell surface to improve circulation half-life and minimize systemic toxicity [3, 7, 10, 11]. Their health and function are routinely monitored through clinical biomarkers such as hemoglobin levels, hematocrit, and reticulocyte counts [2, 8].

Other names

Red blood cellRed cellErythroid cellRed corpuscle

Modulation of hemoglobin oxygen affinity, induction of fetal hemoglobin, stimulation of erythropoiesis, and utilization as a cellular bioreactor for encapsulated drug delivery or metabolic toxin clearance.