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Recombinant DNA

Recombinant DNA

Recombinant DNA

Recombinant DNA

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...

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,...

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...

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...

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Related Experiment Video

Updated: Jun 19, 2026

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

Recombinant erythropoietin

¹Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205.

Annual Review of Medicine

|January 1, 1993

Summary

Erythropoietin (EPO), a hormone produced by the kidneys and liver, regulates red blood cell production. Measuring plasma EPO levels helps identify anemias treatable with recombinant human EPO.

Area of Science:

Endocrinology
Hematology
Physiology

Background:

Erythropoietin (EPO) is a unique hematopoietic growth factor with hormonal properties.
Produced primarily in the kidneys and liver, EPO is crucial for red blood cell development.
EPO production is tightly regulated by tissue oxygen levels.

Purpose of the Study:

To elucidate the regulatory mechanisms of erythropoietin production.
To establish the role of plasma erythropoietin concentration in diagnosing erythropoietin-deficient states.
To highlight the therapeutic potential of recombinant human erythropoietin for anemia.

Main Methods:

Review of existing literature on erythropoietin synthesis and regulation.
Analysis of the relationship between tissue oxygenation and EPO gene expression.

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

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

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Correlation of plasma EPO levels with erythropoietin-deficient anemias.

Main Results:

Erythropoietin production is stimulated by hypoxia and anemia, and suppressed by erythrocytosis.
Plasma EPO concentration serves as a reliable indicator of EPO production.
Anemias resulting from EPO deficiency can be effectively treated with recombinant human erythropoietin.

Conclusions:

Erythropoietin functions as a key hormonal regulator of erythropoiesis.
Plasma EPO levels are critical for diagnosing conditions of inadequate EPO production.
Recombinant human erythropoietin offers a targeted therapy for specific types of anemia.