Erythropoietin
Erythropoietin - Related Videos
10:32
Implantation of Miniosmotic Pumps and Delivery of Tract Tracers to Study Brain Reorganization in Pathophysiological Conditions
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Cited by 10 •
2016
In order to study brain reorganization under pathological conditions we used miniosmotic pumps for direct protein delivery into the brain circumventing the blood brain barrier. Tract tracers are then injected to study alterations in brain connectivity under the influence of the protein.
07:40
Gene Transfection toward Spheroid Cells on Micropatterned Culture Plates for Genetically-modified Cell Transplantation
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Cited by 9 •
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This protocol describes a cell transplantation system using genetically modified, injectable spheroids. Cell spheroids are cultured on micropatterned culture plates and recovered after gene introduction using polyplex nanomicelles. This system facilitates prolonged transgene expression from the transplanted cells in host animals while maintaining the innate function of the cells.
14:22
Lentiviral-mediated Knockdown During Ex Vivo Erythropoiesis of Human Hematopoietic Stem Cells
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Cited by 19 •
2011
An ex vivo protocol to generate mature human red blood cells from hematopoietic stem/progenitors is described. Additionally we describe an efficient lentiviral-delivery method to knockdown the transcription factor TAL1 in primary erythroid cells. The efficiency of lentivirus mediated gene delivery is demonstrated using GFP expressing viruses.
09:40
Identification of a Murine Erythroblast Subpopulation Enriched in Enucleating Events by Multi-spectral Imaging Flow Cytometry
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Cited by 6 •
2014
The present protocol describes a novel method of identifying a population of enucleating orthochromatic erythroblasts by multi-spectral imaging flow cytometry, providing a visualization of the erythroblast enucleation process.
15:32
Identification and Analysis of Mouse Erythroid Progenitors using the CD71/TER119 Flow-cytometric Assay
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Cited by 147 •
2011
A flow-cytometric method for identification and molecular analysis of differentiation-stage-specific murine erythroid progenitors and precursors, directly in freshly –harvested mouse bone marrow, spleen or fetal liver. The assay relies on cell-surface markers CD71, Ter119, and cell size.
FAQs
Reduced oxygen availability activates hypoxia-inducible factors, which increase erythropoietin synthesis and release, mainly in the kidneys. This places oxygen sensing upstream of the hormone response rather than directly stimulating marrow cells. As circulating erythropoietin rises, the signal links tissue oxygen demand with increased erythropoiesis, helping adjust red blood cell numbers to physiological needs.
After erythropoietin binds receptors on erythroid progenitor cells in bone marrow, it activates intracellular signaling pathways that support cell survival, proliferation, and maturation. These effects determine how many developing cells continue through erythropoiesis and become part of the red blood cell supply. The receptor response therefore converts a hormonal signal into a cellular production outcome.
The kidneys provide the main oxygen-sensitive site described for erythropoietin regulation, while bone marrow contains the responsive erythroid progenitors. Communication between these locations separates detection of oxygen need from blood-cell production. This arrangement allows tissue oxygen status to influence erythropoiesis through a circulating hormonal signal, rather than through a marrow-only response.
For selected forms of anemia, erythropoietin has therapeutic relevance because increasing this hormonal signal can promote the survival, proliferation, and maturation of erythroid progenitors. Its clinical application is therefore limited to selected forms of anemia, with the appropriate indication depending on the condition being treated. The underlying rationale comes from oxygen-regulated control of erythropoiesis.
Studying erythropoietin allows biologists to trace a feedback loop from tissue oxygen demand to circulating red blood cell numbers. Investigations can relate hypoxia-inducible factor activity and hormone release to receptor-driven responses in erythroid progenitors. This makes the system useful for examining how oxygen homeostasis is maintained through coordinated sensing, signaling, and blood-cell production.
Using erythropoietin to enhance athletic performance differs from studying or treating the oxygen-regulated system. It places the hormone in a performance-enhancement context associated with significant health and regulatory concerns. The distinction matters because biology and medicine examine oxygen homeostasis and selected anemia treatment, whereas misuse pursues performance enhancement rather than those supported purposes.