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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...

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...

Hormonal Regulation of Blood Pressure

Hormonal Regulation of Blood Pressure

Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction while...

Major Hormones and Their Functions

Major Hormones and Their Functions

Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and lactation.

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Erythropoietin: a hormone with multiple functions.

Matilde Lombardero¹, Kalman Kovacs, Bernd W Scheithauer

¹Department of Anatomy and Animal Production, Faculty of Veterinary Sciences, University of Santiago de Compostela, Lugo, Spain. matilde.lombardero@usc.es

Pathobiology : Journal of Immunopathology, Molecular and Cellular Biology

|April 9, 2011

Summary

This summary is machine-generated.

Erythropoietin (EPO) has diverse non-blood-forming roles, including neuroprotection and cardioprotection. This review explores EPO

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

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Published on: July 16, 2011

Area of Science:

Molecular Biology
Hematology
Oncology
Neuroscience
Cardiology

Background:

Erythropoietin (EPO) is primarily known as a hormone regulating red blood cell production.
EPO and its receptor (EPO-R) are expressed in various non-hematopoietic tissues.
Tissue oxygenation regulates EPO production and EPO-R expression.

Purpose of the Study:

To review the non-hematopoietic functions of Erythropoietin (EPO).
To elucidate the mechanisms of action of EPO in non-hematopoietic cells.
To assess the potential therapeutic applications of EPO in various disorders.

Main Methods:

Literature review of scientific articles on Erythropoietin (EPO) and its receptor (EPO-R).
Analysis of studies investigating EPO's role in non-hematopoietic tissues.
Examination of research on EPO's effects on cellular processes like apoptosis, angiogenesis, and neurogenesis.

Main Results:

EPO exhibits pleiotropic activities beyond erythropoiesis, including antiapoptotic, neuroprotective, and cardioprotective effects.
EPO influences angiogenesis, neurogenesis, and immune responses.
The role of EPO and EPO-R in tumor progression is controversial, with conflicting reports on their impact on cancer cell proliferation and survival.

Conclusions:

Erythropoietin (EPO) possesses significant non-hematopoietic functions with potential therapeutic value.
Understanding EPO's mechanisms in diverse tissues may unlock new treatment strategies for various diseases.
Further research is needed to clarify EPO's role in cancer and its therapeutic potential in oncology.