Bioengineering Hematopoietic Stem Cell Niche toward Regenerative Medicine

Area of Science:

• Bioengineering
• Regenerative Medicine
• Hematology

Background:

• Hematopoietic stem cell (HSC) niche biology research has focused on defining the niche's components.
• The next frontier involves translating this knowledge into clinical applications for regenerative medicine.

Purpose of the Study:

• To bridge the gap between HSC niche biology and bioengineering for regenerative medicine applications.
• To highlight advancements in in vitro HSC expansion and niche modeling.

Main Methods:

• Reviewing current consensus on HSC niche components (endothelial cells, perivascular mesenchymal stromal cells).
• Discussing small molecule-driven expansion of cord blood HSC.
• Exploring bioengineering strategies like microfluidic chips and organoids for HSC niche modeling.
• Summarizing breakthroughs in inducing HSC from other cell types.

Main Results:

• Endothelial cells and perivascular mesenchymal stromal cells are key regulators of HSC maintenance.
• Small molecules enable in vitro expansion of cord blood HSC.
• Microfluidic devices and organoids are emerging as tools to model the HSC niche.
• Inducing HSC from alternative cell types shows promise.

Conclusions:

• A deeper understanding of HSC niche biology is essential for bioengineering advancements.
• Applying HSC niche knowledge to bioengineering offers a promising path for regenerative medicine.
• Improved in vitro HSC expansion and niche modeling are critical for HSC transplantation success.