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Stem Cell Niche

Stem Cell Niche

The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...

Multipotency of Hematopoietic Stem Cells

Multipotency of Hematopoietic Stem Cells

The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...

Regulation of Hematopoietic Stem Cells

Regulation of Hematopoietic Stem Cells

All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...

Hematopoiesis

Hematopoiesis

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...

Stem Cell Therapy for Tissue Regeneration

Stem Cell Therapy for Tissue Regeneration

Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
Types of Stem Cells used in Stem Cell Therapy
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Mesenchymal Stem Cells

Mesenchymal Stem Cells

Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their access...

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Related Experiment Video

Updated: May 29, 2026

Bioengineering of Humanized Bone Marrow Microenvironments in Mouse and Their Visualization by Live Imaging

Bioengineering of Humanized Bone Marrow Microenvironments in Mouse and Their Visualization by Live Imaging

Published on: August 1, 2017

Stem cell interactions in a bone marrow niche.

Joan Isern¹, Simón Méndez-Ferrer

¹Department of Cardiovascular Development and Repair, Centro Nacional de Investigaciones Cardiovasculares Carlos CNIC, Calle Melchor Fernández Almagro 3, Madrid, 28029, Spain.

Current Osteoporosis Reports

|September 21, 2011

Summary

This summary is machine-generated.

Stem cells possess self-renewal and multilineage differentiation properties regulated by their niche microenvironment. The hematopoietic stem cell niche

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Flow Cytometry Analysis of Murine Bone Marrow Hematopoietic Stem and Progenitor Cells and Stromal Niche Cells

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Flow Cytometry Analysis of Murine Bone Marrow Hematopoietic Stem and Progenitor Cells and Stromal Niche Cells

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Area of Science:

* Stem cell biology and microenvironmental regulation.
* Hematopoiesis and bone marrow homeostasis.
* Cellular and molecular mechanisms of stem cell behavior.

Background:

* Stem cells are defined by self-renewal and multilineage differentiation.
* The stem cell niche is a critical microenvironment regulating stem cell behavior.
* The hematopoietic stem cell (HSC) niche is complex and challenging to study.

Purpose of the Study:

* To review recent advancements in understanding the HSC niche.
* To emphasize integrative mechanisms in bone marrow homeostasis and physiology.
* To highlight anatomical, histological, cellular, and molecular aspects of the HSC niche.

Main Methods:

* Review of recent literature on HSC niche research.
* Analysis of anatomical and histological features of the bone marrow.
* Summary of findings on cell types and regulatory mechanisms within the HSC niche.

Main Results:

* The HSC niche involves complex interactions between HSCs and bone marrow components.
* Specific cell types and molecular signals critically regulate HSC function.
* Understanding the HSC niche is crucial for bone marrow homeostasis and multisystem physiology.

Conclusions:

* The HSC niche is a dynamic microenvironment essential for maintaining blood cell production.
* Integrative mechanisms within the niche are key to bone marrow and overall physiological balance.
* Further research into the HSC niche promises insights into stem cell regulation and potential therapies.