Wharton's Jelly-Derived Hybrid Scaffolds for Tissue Engineering Applications

Regenerative medicine is increasingly pivoting toward acellular, bio-instructive strategies that leverage the biomimetic potential of the extracellular matrix (ECM). Among neonatal tissues, Wharton's Jelly (WJ) has emerged as a primary source of bioactive molecules, structural proteins, and growth factors essential for tissue repair. This progress report provides a comprehensive analysis of decellularized Wharton's Jelly (DWJ) and its integration into advanced hybrid scaffold systems, with a particular focus on the engineering of alginate-based composites. While standalone DWJ scaffolds provide a biomimetic environment rich in collagen and glycosaminoglycans, they often lack the mechanical robustness required for load-bearing clinical applications. The synergy between WJ and polymers-processed through 3D bioprinting, microencapsulation, and lyophilization-overcomes these limitations, offering highly tunable degradation and structural integrity. Furthermore, we highlight the emergence of "smart" bio-instructive systems (2024-2025), which integrate WJ-derived exosomes and stimuli-responsive elements to coordinate cell-free tissue repair in situ. By evaluating applications in cartilage, bone, neural, and intervertebral disc regeneration, this review underscores the potential of WJ-hybrid platforms to serve as next-generation therapeutic tools in translational clinical practice.