Related Experiment Video
Updated: Jul 7, 2026
10:19
Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models
Published on: August 9, 2012
19.4K
Integrated 'Shield-Spear' Biological Patch for Fibrosis-Free Bladder Reconstruction.
Xiaoqi Wu1, Huitong Ruan2, Xiaolin Zhang1
1Department of Urology and Andrology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200001, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|August 13, 2025
Summary
This study introduces a novel
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Bladder reconstruction faces challenges with fibrosis and neural dysregulation.
- Current treatments neglect the balance between healing and collagen deposition.
- Fibrosis exacerbation due to neural factors is a key issue in bladder repair.
Purpose of the Study:
- To develop an integrated 'shield-spear' patch for bladder reconstruction without fibrosis.
- To synergistically balance fibrosis inhibition and wound healing.
- To address both collagen deposition and neurogenic fibrosis.
Main Methods:
- Engineered an integrated 'shield-spear' patch using hydrogel (HAD) and engineered extracellular vesicles (S100Aptamer-EVs).
- Utilized Schiff base chemistry and Michael addition reactions for patch fabrication.
- Tested the patch in a large animal model (beagles).
Main Results:
- The 'shield' layer neutralized macrophages and suppressed collagen overexpression.
- The 'spear' layer released S100Aptamer-EVs to target Schwann cells, downregulate fibrosis pathways (TGFβ/Smad), and promote healing (Cadherin signaling).
- Achieved extensive bladder reconstruction without fibrosis in a large animal model.
Conclusions:
- The 'shield-spear' patch represents a novel strategy for bladder reconstruction.
- This approach effectively balances fibrosis inhibition and wound healing.
- The patch shows promise for tissue-engineered bladder repair, avoiding fibrosis.
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