Bio-mimicking Shear Stress Environments for Enhancing Mesenchymal Stem Cell Differentiation

Area of Science:

• Biomedical Engineering
• Stem Cell Biology
• Regenerative Medicine

Background:

• Mesenchymal stem cells (MSCs) are multipotent cells advantageous for clinical applications due to low immunogenicity and ethical considerations.
• MSC differentiation in vitro requires mimicking the in vivo environment, including biochemical and mechanical stimuli.
• Fluid shear stress (SS) is an understudied biophysical cue in MSC differentiation compared to substrate stiffness or topography.

Purpose of the Study:

• To review the current understanding of shear stress (SS) in regulating mesenchymal stem cell (MSC) differentiation.
• To explore the potential of SS in augmenting MSC differentiation into various lineages, including those not yet fully explored in vitro.
• To highlight the combined use of SS with other cues for improved in vitro cell differentiation.

Main Methods:

• Literature review of studies investigating the role of shear stress in MSC differentiation.
• Analysis of existing research on SS in physiological contexts relevant to tissue homeostasis.
• Synthesis of findings on SS-induced differentiation across multiple cell lineages.

Main Results:

• Shear stress (SS) has been shown to influence MSC differentiation into osteogenic, cardiovascular, chondrogenic, adipogenic, and neurogenic lineages.
• The role of SS in promoting differentiation towards liver, kidney, and corneal tissues is physiologically recognized but less explored in vitro.
• SS can be a critical factor in mimicking the in vivo milieu for enhanced cell differentiation.

Conclusions:

• Shear stress (SS) is a crucial biophysical stimulus for mesenchymal stem cell (MSC) differentiation.
• Incorporating SS into in vitro differentiation protocols can improve cell functionality by better replicating in vivo conditions.
• Further research into SS applications holds significant potential for advancing regenerative medicine therapies.