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Related Concept Videos

Erythropoiesis01:14

Erythropoiesis

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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,...
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Factors Affecting Erythropoiesis01:24

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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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In-vitro Mutagenesis01:16

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To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
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Related Experiment Video

Updated: Mar 17, 2026

Author Spotlight: Advancing Erythropoiesis Research - A Simplified Pipeline for Assessing Hematopoietic Stem Cell Function in Myelodysplastic Syndromes
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Author Spotlight: Advancing Erythropoiesis Research - A Simplified Pipeline for Assessing Hematopoietic Stem Cell Function in Myelodysplastic Syndromes

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Genetically Engineered In Vitro Erythropoiesis.

Cristopher Geiler1,2, Inez Andrade1, Alexandra Clayton1

  • 1Department of Basic Science Research, Cellologi, LLC, California, USA.

International Journal of Stem Cells
|July 19, 2016
PubMed
Summary

Genetic engineering can enhance erythroblast expansion for mass production of red blood cells, addressing potential blood supply shortages. This research improves in vitro erythropoiesis efficiency from human stem cells.

Keywords:
Adult Stem CellsErythroblastsErythroleukemiaErythropoiesisHematopoietic Stem Cells

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Area of Science:

  • Biotechnology
  • Hematology
  • Stem Cell Biology

Background:

  • Engineered blood offers a solution to predicted US blood supply shortages for transfusions.
  • Current methods face barriers in producing clinically relevant quantities of red blood cells due to limited erythroblast expansion and inhibitory regulatory mechanisms.
  • Significant improvement in erythroblast in vitro expansion is needed for mass production.

Purpose of the Study:

  • To enhance in vitro erythropoiesis efficiency using genetic engineering.
  • To overcome limitations in erythroblast expansion capacity.
  • To enable mass production of engineered blood from human adult stem cells.

Main Methods:

  • Isolation and culture of hematopoietic stem cells (HSCs) in growth factor-supplemented liquid media.
  • Transfection of cells using a Piggybac plasmid transposon system.
  • Fluorescence-activated cell sorting (FACS) analysis to characterize cell populations.

Main Results:

  • SPI-1 transfected cells demonstrated sustained proliferation in liquid culture.
  • FACS analysis confirmed a uniform CD71⁺CD117⁺ proerythroblast population after 45 days.
  • Genetically modified erythroblasts showed potential for in vitro immortalization, mimicking murine erythroleukemia models.

Conclusions:

  • Genetic modification effectively increases erythroblast expansion capacity in vitro.
  • This approach holds promise for overcoming barriers to mass red blood cell production.
  • The study suggests a viable strategy for developing engineered blood to meet transfusion demands.