Organ reconstruction: Dream or reality for the future

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Tissue Engineering

Background:

• Growing organ transplant waiting lists and an aging population necessitate innovative solutions.
• Whole organ engineering faces challenges due to organ complexity and cellular heterogeneity.
• Decellularization preserves extracellular matrix and vascular networks, creating scaffolds for tissue regeneration.

Purpose of the Study:

• To review the current state and challenges of whole organ engineering for transplantation.
• To explore the processes of decellularization and recellularization in creating functional organ scaffolds.
• To highlight the potential of reconstructed organs for treating organ failure.

Main Methods:

• Decellularization of whole organs (liver, heart, lung, kidney) from various species (rodent, porcine, rhesus monkey).
• Utilizing preserved extracellular matrix and vascular networks as scaffolds.
• Investigating diverse cell sources for recellularization, including embryonic, adult, progenitor, and induced pluripotent stem cells (iPS).

Main Results:

• Successful decellularization of various organs, yielding scaffolds with intact extracellular matrix and vascular systems.
• Identification of potential cell sources for recellularization, such as hepatocytes, mesenchymal stem cells, and progenitor cells.
• Demonstration of the feasibility of using decellularized organs for engineering functional tissues like liver and lungs.

Conclusions:

• Whole organ engineering holds significant promise for addressing organ shortages.
• Challenges remain in cell selection, guided differentiation, and understanding cell-scaffold interactions.
• Long-term animal studies and clinical trials are essential before widespread clinical application of reconstructed organs.