Mesenchymal stem cells and hypoxia: where are we?

Area of Science:

• Cell Biology
• Regenerative Medicine
• Tissue Engineering

Background:

• Multipotent mesenchymal stromal cells (MSCs) are vital for tissue repair and hold promise for cell therapy.
• Current applications are hindered by cell damage from harsh transplantation environments, particularly low oxygen (hypoxia).
• MSCs' response to hypoxia is complex and debated, showing both detrimental and beneficial effects.

Purpose of the Study:

• To review current knowledge on MSC survival under varying hypoxic conditions.
• To elucidate the mechanisms underlying MSC sensitivity and resistance to hypoxia.
• To inform strategies for optimizing MSC-based therapies.

Main Methods:

• Literature review of studies investigating MSCs under hypoxic conditions.
• Analysis of data on MSC survival, function, and molecular responses to hypoxia.
• Synthesis of findings to identify key mechanisms of hypoxic impact.

Main Results:

• MSC responses to hypoxia are dose- and time-dependent, with varying outcomes.
• Hypoxia can induce both cell death and protective or adaptive responses in MSCs.
• Specific signaling pathways and molecular factors mediate MSCs' differential responses to low oxygen.

Conclusions:

• MSC behavior under hypoxia is context-dependent, influencing their therapeutic potential.
• Further research into hypoxia-induced mechanisms is essential for enhancing MSC viability and efficacy in regenerative medicine.
• Targeting these mechanisms could overcome limitations in ex vivo cell manipulation and transplantation.