Cartilage Tissue Engineering and Regeneration Methods

Cartilage tissue engineering and regeneration encompasses a multidisciplinary suite of approaches aimed at restoring damaged or degenerated cartilage, a tissue with intrinsically low self-repair capacity. Strategies combine cells, biomaterials, bioactive molecules and physical stimuli to recreate the complex microenvironment of native cartilage. Cell-based therapies employ mesenchymal stem cells or induced pluripotent stem cell-derived chondroprogenitors to populate three-dimensional scaffolds and secrete extracellular matrix rich in collagen II and glycosaminoglycans. Acellular scaffolds—most notably hydrogels, decellularised extracellular matrix and synthetic nanocomposites—provide mechanical support and deliver drugs, growth factors or genes in a controlled manner. Advances in bioprinting, supramolecular chemistry and microphysiological systems allow fabrication of osteochondral interfaces and patient-specific implants. Small molecules such as kartogenin modulate signalling pathways to drive chondrogenesis in situ. Together these methods seek to alleviate pain and disability arising from osteoarthritis, sports injuries and congenital defects, offering minimally invasive, long-term solutions for joint repair worldwide.

Research from Nature Portfolio

Recent studies have described an ultra-durable, cell-free hydrogel scaffold crosslinked via multiple hydrogen bonds and loaded sequentially with tannic acid and a chondrogenic small molecule. This material exhibits rapid shape recovery at body temperature and exceptional mechanical endurance under cyclic loading, offering potential for arthroscopic implantation. In vivo, the scaffold modulates local inflammation and oxidative stress to establish a regenerative niche, promotes recruitment of endogenous mesenchymal stem cells, and induces differentiation towards chondrocytes. The staged release of bioactive agents supports full-thickness cartilage regeneration in osteoarthritic models, highlighting a promising minimally invasive approach to restore joint function.

Cartilage Tissue Engineering and Regeneration Methods publication trend

The graph below shows the total number of articles in cartilage tissue engineering and regeneration methods across all publications each year (not limited to Nature Index journals).

Technical terms

Scaffold: A three-dimensional structure designed to support cell adhesion, proliferation and extracellular matrix deposition.

Hydrogel: A water-swollen polymer network that mimics the hydrated environment of native cartilage and can deliver bioactive factors.

Decellularised extracellular matrix (dECM): Biological tissue processed to remove cells while retaining structural proteins and signalling molecules.

Mesenchymal stem cells (MSCs): Multipotent progenitor cells capable of differentiating into chondrocytes, osteoblasts and other connective-tissue lineages.

Chondrogenesis: The process by which progenitor cells differentiate and synthesise cartilage-specific matrix components.

Osteochondral: Pertaining to the functional unit of articular cartilage and underlying subchondral bone.

References

1. In Situ Deposition of Drug and Gene Nanoparticles on a Patterned Supramolecular Hydrogel to Construct a Directionally Osteochondral Plug. Nano-Micro Letters (2023).
2. Ultra-durable cell-free bioactive hydrogel with fast shape memory and on-demand drug release for cartilage regeneration. Nature Communications (2023).
3. Decellularized extracellular matrix particle-based biomaterials for cartilage repair applications. Journal of Material Science and Technology (2023).
4. Osteochondral Tissue Chip Derived From iPSCs: Modeling OA Pathologies and Testing Drugs. Frontiers in Bioengineering and Biotechnology (2019).
5. Full-thickness cartilage defects are repaired via a microfracture technique and intraarticular injection of the small-molecule compound kartogenin. Arthritis Research & Therapy (2015).