Hematopoiesis
Hematopoiesis - Related Videos
01:21
Hematopoiesis
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2025
The process of blood cell formation is called hematopoiesis. Hematopoiesis starts early during development, on the seventh day of embryogenesis. This phase of hematopoiesis is called the primitive wave, wherein the extraembryonic yolk sac allows the production of erythroid cells and endothelial cells from a common precursor called hemangioblast. The erythroid cells provide oxygen to support the growth of the rapidly dividing embryo. Hemangioblasts later develop into hematopoietic stem cells or...
01:20
Overview of Hematopoiesis
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2024
Hematopoiesis, or blood cell production, is a vital biological process that begins early in embryonic development and continues throughout life. This process generates the various types of cells found in blood, including red blood cells, white blood cells, and platelets from hematopoietic stem cells (HSCs). Developmental Phases of Hematopoiesis Initially, HSCs are formed in the embryonic yolk sac, a critical site for early blood cell production. These stem cells subsequently migrate to other...
11:50
Ex vivo Mimicry of Normal and Abnormal Human Hematopoiesis
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Cited by 9 •
2012
A 3D culture system for hematopoiesis is described using human cord blood and leukemic bone marrow cells. The method is based on the use of a porous synthetic polyurethane scaffold coated with extracellular matrix proteins. This scaffold is adaptable to accommodate a wide range of cells.
07:38
Application of Aorta-gonad-mesonephros Explant Culture System in Developmental Hematopoiesis
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Cited by 2 •
2017
This protocol describes using cultured Aorta-Gonad-Mesonephros for expression analyses, colony-forming units in the culture and spleen, and long-term reconstitution to determine the effect of regulatory factors and signaling pathways on hematopoietic stem cell development. This has been demonstrated as an effective system for studying hematopoietic stem cell biology and function.
08:00
Bone Marrow Transplantation Procedures in Mice to Study Clonal Hematopoiesis
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Cited by 24 •
2021
We describe three methods of bone marrow transplantation (BMT): BMT with total-body irradiation, BMT with shielded irradiation, and BMT method with no pre-conditioning (adoptive BMT) for the study of clonal hematopoiesis in mouse models.
FAQs
These multipotent stem cells can either self-renew, preserving the stem-cell pool, or commit to a pathway that produces specialized blood cells. This balance allows hematopoiesis to continue throughout life rather than exhausting its initiating cell population. Studying the decision between maintenance and differentiation helps researchers understand how normal blood production is sustained and how disrupted regulation may contribute to disease.
Commitment to myeloid or lymphoid lineages organizes the production of distinct blood-cell groups from a common stem-cell source. This branching process supports the coordinated generation of cells involved in oxygen transport, immune defense, and blood clotting. Comparing these lineages helps biologists trace blood-cell development and investigate how abnormalities in specific developmental routes affect blood or immune function.
Growth factors and cytokines provide signals that influence whether hematopoietic stem cells remain self-renewing or proceed toward differentiation. Their regulatory input helps coordinate the quantity and type of blood cells produced as the body maintains its blood supply. Research on these signals is therefore important for explaining how normal production is controlled and how altered signaling can accompany blood disorders.
The bone marrow is the primary site where hematopoietic stem cells carry out the decisions that generate new blood cells. Its central role makes it a key biological setting for examining self-renewal, lineage commitment, and replenishment. Focusing on marrow-based hematopoiesis helps researchers connect cellular development with the maintenance of oxygen transport, immune defense, and clotting.
Hematopoiesis provides a framework for examining how blood-cell production becomes abnormal. Research can compare normal stem-cell renewal, lineage commitment, and replenishment with disruptions associated with leukemia or anemia. This comparison helps identify which stages of blood development may be altered and clarifies how defects in regulated production can lead to clinically important changes in blood-cell populations.
Because hematopoiesis generates white blood cells through regulated developmental pathways, it offers a way to study how immune-cell production is established and maintained. Researchers can examine the relationship between stem cells, lineage commitment, and immune defense rather than viewing immune disorders only as mature-cell problems. This perspective supports investigation of how disrupted blood development may affect immunity.
Stem cell transplantation research depends on understanding the cells that can replenish blood-cell populations and the pathways through which they differentiate. Knowledge of hematopoiesis helps researchers interpret how multipotent hematopoietic stem cells contribute to renewed blood production after transplantation. It also provides context for evaluating whether self-renewal and lineage development remain appropriately regulated in the transplanted system.