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Erythropoiesis

Erythropoiesis

Red blood cells (RBCs) transport oxygen to all body tissues. These cells survive only for 120 days and then need to be replenished. Erythropoiesis is the process of RBC production. In healthy individuals, erythropoiesis ensures all tissues are amply supplied with oxygen. In addition, blood loss due to injury leads to a drop in the physiological oxygen level that will cause erythropoiesis. Any defect in erythropoiesis leads to several physiological disorders, including thalassemia, anemia, and...

Erythropoiesis

Erythropoiesis

Red blood cells (RBCs) transport oxygen to all body tissues. These cells survive only for 120 days and then need to be replenished. Erythropoiesis is the process of RBC production. In healthy individuals, erythropoiesis ensures all tissues are amply supplied with oxygen. In addition, blood loss due to injury leads to a drop in the physiological oxygen level that will cause erythropoiesis. Any defect in erythropoiesis leads to several physiological disorders, including thalassemia, anemia, and...

Overview of Exosomes

Overview of Exosomes

Exosomes are stable, lipid bilayer-enclosed vesicles capable of crossing biological barriers. They can carry a wide range of molecules required for intercellular communication. Once exosomes are released from the cell where they originated, they enter a recipient cell through various pathways such as fusion, receptor-mediated endocytosis, macropinocytosis, and phagocytosis.
Stahl et al. discovered exosomes in 1983, but the exosomes were initially considered waste products released from the...

Factors Affecting Erythropoiesis

Factors Affecting Erythropoiesis

The cardiovascular system regulates the number of erythrocytes in the bloodstream to ensure optimal oxygen transport. It also prevents over-proliferation of these cells, which helps to maintain blood viscosity and flow rate.
Several factors influence the erythrocyte production rate, with tissue oxygen level being among the most critical. Intense exercise or high altitudes can cause tissue hypoxia, which triggers the kidneys to release more erythropoietin (EPO) into the bloodstream.
EPO then...

Role of Hematopoietic Growth Factors

Role of Hematopoietic Growth Factors

Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...

Lifecycle of Erythrocytes

Lifecycle of Erythrocytes

Erythrocytes, also known as red blood cells, constantly move through blood capillaries. As a result, they damage their plasma membrane due to the continuous friction. Typically, after 100 to 120 days, erythrocytes become rigid and fragile as they wear out. As they pass through small vessels in the spleen and liver, they can get trapped and break apart into fragments.
The resident phagocytic macrophages deal with these damaged cells by engulfing them and separating their globin and heme groups.

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Related Experiment Video

Updated: Jun 10, 2026

A Comprehensive Pipeline to Assess the Efficiency of Human Erythropoiesis In Vitro and Ex Vivo

A Comprehensive Pipeline to Assess the Efficiency of Human Erythropoiesis In Vitro and Ex Vivo

Published on: January 10, 2025

Exosomes in erythropoiesis.

¹UMR 5235 CNRS (DIMNP), université Montpellier II - cc 107, place E.-Bataillon, 34095 Montpellier cedex 05, France. mvidal@univ-montp2.fr

Transfusion Clinique Et Biologique : Journal De La Societe Francaise De Transfusion Sanguine

|July 27, 2010

Summary

Exosomes are released from red blood cells during differentiation, remodeling their membranes. This process involves protein sorting and can lead to regulated loss of membrane functions.

Area of Science:

Cell Biology
Hematology
Membrane Biology

Background:

Multivesicular endosomes generate intraluminal vesicles.
These vesicles can be released extracellularly as exosomes.
Exosomes play roles in intercellular communication.

Purpose of the Study:

To review the role of exosome secretion in red blood cell membrane remodeling.
To explore the mechanisms of exosome biogenesis during erythropoiesis.
To understand the functional consequences of exosome release on cell membranes.

Main Methods:

Literature review of exosome biogenesis and function.
Analysis of protein sorting mechanisms in endosomes.
Examination of red blood cell differentiation processes.

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Lentiviral-mediated Knockdown During Ex Vivo Erythropoiesis of Human Hematopoietic Stem Cells

Lentiviral-mediated Knockdown During Ex Vivo Erythropoiesis of Human Hematopoietic Stem Cells

Published on: July 16, 2011

Purification and microRNA Profiling of Exosomes Derived from Blood and Culture Media

Purification and microRNA Profiling of Exosomes Derived from Blood and Culture Media

Published on: June 14, 2013

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Last Updated: Jun 10, 2026

A Comprehensive Pipeline to Assess the Efficiency of Human Erythropoiesis In Vitro and Ex Vivo

A Comprehensive Pipeline to Assess the Efficiency of Human Erythropoiesis In Vitro and Ex Vivo

Published on: January 10, 2025

Lentiviral-mediated Knockdown During Ex Vivo Erythropoiesis of Human Hematopoietic Stem Cells

Lentiviral-mediated Knockdown During Ex Vivo Erythropoiesis of Human Hematopoietic Stem Cells

Published on: July 16, 2011

Purification and microRNA Profiling of Exosomes Derived from Blood and Culture Media

Purification and microRNA Profiling of Exosomes Derived from Blood and Culture Media

Published on: June 14, 2013

Main Results:

Exosome secretion is a key event in late-stage erythropoiesis.
Exosome biogenesis involves complex protein sorting pathways.
This process contributes to the remodeling of the red cell plasma membrane.
Exosome release can result in a regulated loss of membrane activities.

Conclusions:

Exosome secretion is integral to red blood cell maturation.
Understanding these mechanisms provides insights into membrane dynamics.
Regulated loss of membrane function via exosomes is a novel concept in erythropoiesis.