Human adipose-derived mesenchymal stem cells accelerate decellularized neobladder regeneration

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Urology

Background:

• Decellularized natural bladder matrices offer a promising approach for bladder regeneration after cystectomy.
• Current strategies require enhancement to ensure functional recovery and tissue integration.

Purpose of the Study:

• To compare decellularized matrices with those recellularized with human adipose-derived mesenchymal stem cells (ADSC) after implantation.
• To evaluate the regenerative potential of ADSC-seeded neobladders in a rat model.

Main Methods:

• Partial cystectomy in rats followed by implantation of decellularized bladder matrices.
• Seeding matrices with human adipose-derived mesenchymal stem cells (ADSC).
• Histological and immunohistochemical analysis of regenerated tissue, including urothelium, smooth muscle, vascularization, and innervation.

Main Results:

• ADSC-seeded matrices promoted significant recovery of mature urothelium (p63+, cytokeratin 7+).
• Increased expression of vimentin and smooth muscle actin was observed in ADSC-treated bladders.
• Enhanced vascularization (CD31+) and nerve innervation (S100β+) were noted in ADSC-seeded neobladders.

Conclusions:

• ADSC significantly enhance the regenerative capacity of decellularized bladder matrices.
• The pro-regenerative secretome of ADSC plays a crucial role in bladder tissue substitution.
• Further research into the underlying mechanisms is needed before clinical application.