What are reticulocytes?
Feb 23, 2023
Source: Cainiu Health
Dr. Zhang Heyang
Introduction
Reticulocytes are immature red blood cells, representing an intermediate stage between late normoblasts after nuclear extrusion and mature red blood cells. Anemia patients are advised to promptly undergo reticulocyte testing to determine the specific type of anemia. Elevated reticulocyte levels indicate normal bone marrow hematopoietic function, whereas decreased reticulocyte counts are generally associated with aplastic anemia or other bone marrow disorders.
Reticulocytes are immature red blood cells, representing transitional cells between late-stage normoblasts after nuclear extrusion and mature red blood cells.
The cytoplasm of reticulocytes contains basophilic substances such as ribosomes and ribonucleic acid. After staining with brilliant cresyl blue or new methylene blue, a reticular structure appearing blue or blue-green becomes visible. Normally, the number of reticulocytes in the bone marrow is higher than in peripheral blood, and these cells appear more immature. Reticulocyte count serves as an important indicator for assessing whether bone marrow function is suppressed or recovering.
An increased reticulocyte count indicates active bone marrow erythropoiesis and may suggest conditions such as hemolysis or hemorrhage. In contrast, diseases such as aplastic anemia and acute leukemia lead to a decreased reticulocyte count. Measurement of both total reticulocyte count and percentage is a common laboratory method used in the clinical diagnosis and monitoring of treatment response in hematologic disorders, particularly anemias.
It is recommended that patients with anemia undergo timely reticulocyte testing to determine the specific type of anemia. An elevated reticulocyte count suggests normal bone marrow hematopoietic function, whereas a decreased count typically indicates marrow-related (ineffective) anemia.
