Survivin Is Required for Mouse and Human Bone Marrow Mesenchymal Stromal Cell Function

Area of Science:

• Cell Biology
• Regenerative Medicine
• Molecular Biology

Background:

• Mesenchymal stromal cells (MSCs) hold promise for cell-based therapies.
• Factors regulating MSC functions are not fully understood.
• Survivin, an endogenous multifunctional factor, was investigated for its role in MSCs.

Purpose of the Study:

• To determine the role of Survivin in regulating mesenchymal stromal cell (MSC) functions.
• To investigate Survivin's impact on MSC survival, proliferation, lineage commitment, migration, and hematopoiesis support.

Main Methods:

• Pharmacological and genetic blockade of Survivin expression in mouse and human bone marrow MSCs.
• Ectopic Survivin overexpression in MSCs.
• Assessment of caspase 3 and 7 expression, proliferation, and colony-forming unit-fibroblasts (CFU-F).
• Evaluation of MSC responses to growth factors (bFGF, PDGF) and a wound healing model.
• Analysis of hematopoiesis-supporting capacity.

Main Results:

• Survivin blockade reduced MSC proliferation and CFU-F, increasing caspase 3 and 7.
• Survivin overexpression led to MSC expansion.
• Survivin is essential for MSC proliferative responses to bFGF and PDGF.
• Survivin inhibition suppressed MSC migration in a wound healing model.
• Loss of Survivin impaired MSCs' capacity to support hematopoiesis.

Conclusions:

• Survivin is a key regulator of both mouse and human MSC functions.
• Targeting Survivin in MSCs may offer clinical benefits for enhancing cell recovery and activity after stress.