Extracellular Matrix and Cellular Plasticity in Musculoskeletal Development

Area of Science:

• Cellular and Molecular Biology
• Developmental Biology
• Tissue Engineering

Background:

• Cellular plasticity enables cell fate reprogramming via dedifferentiation or transdifferentiation.
• In vivo, the microenvironment, including extracellular matrix (ECM) and signaling factors, dictates cellular responses.
• Stem cell niches are crucial for maintaining stem cell populations.

Purpose of the Study:

• To review the role of the microenvironment, particularly the ECM, in regulating cellular plasticity during development and regeneration.
• To explore how differentiated or lineage-restricted cells can be reprogrammed in vivo.
• To highlight examples from musculoskeletal biology.

Main Methods:

• Literature review focusing on cellular plasticity and ECM regulation.
• Analysis of mechanisms driving cell fate changes in vivo.
• Examination of developmental and regenerative processes in musculoskeletal tissues.

Main Results:

• The microenvironment, encompassing ECM biochemical and mechanical cues, is a key regulator of cellular plasticity.
• Cellular reprogramming of differentiated cells can occur in vivo through responses to niche changes, migration, or transitional niches.
• The concept of cellular plasticity extends beyond progenitor cells to include lineage-restricted and differentiated cells.

Conclusions:

• The ECM plays a critical role in directing cellular plasticity and fate determination.
• Understanding cellular plasticity in vivo is essential for advancing regenerative medicine and tissue repair.
• Reprogramming of differentiated cells offers new therapeutic possibilities for regeneration.