Stem Cells for Cultured Meat: Cell Sources, Lineage Specification, and Biomaterial Scaffolds for Edible Tissue...

Area of Science:

• Tissue Engineering
• Cell Biology
• Biotechnology

Background:

• Cultured meat offers an alternative to conventional livestock farming, addressing environmental and ethical concerns.
• The feasibility of cultured meat relies on replicating the complex structure, composition, and nutritional profile of traditional meat.
• Cellular identity, proliferation capacity, and differentiation fidelity are critical determinants in cultured meat production.

Purpose of the Study:

• To review the stem cell biology underpinning cultured meat development from a tissue engineering viewpoint.
• To compare different cell sources and their suitability for cultured meat applications.
• To examine the factors influencing cell differentiation and the role of biomaterials in tissue organization.

Main Methods:

• Comparative analysis of muscle satellite cells, pluripotent stem cells, and progenitor cells.
• Review of signaling pathways, medium design, and co-culture techniques for myogenic and adipogenic commitment.
• Survey of biomaterial scaffolds, including microcarriers, hydrogels, and plant-based matrices.
• Discussion of bioreactor scale-up, cost-effectiveness, cell-line stability, and regulatory considerations.

Main Results:

• Muscle satellite cells provide myogenicity but have limited expansion; pluripotent stem cells are expandable but require directed differentiation; progenitors contribute to fat and connective tissues.
• Growth factors, small molecules, serum-free media, and co-culture strategies are key to controlling myogenic and adipogenic differentiation.
• Biomaterial scaffolds are essential for organizing cells into anisotropic, perfusable constructs, drawing from regenerative medicine principles.

Conclusions:

• The successful development of cultured meat hinges on the integrated design of cell sources, differentiation protocols, and scaffold architecture.
• Co-optimization of these elements, rather than isolated optimization, is crucial for rapid advancement in the field.
• Addressing challenges in scale-up, cost, cell stability, and regulation is vital for the translation of cultured meat technology.