Development of UROGRAFT: A Bladder Acellular Matrix-Based Composite for Advanced Cystoplasty, Highlighting the Role of Graft Shape and Composition.

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Urinary bladder augmentation with gastrointestinal segments, despite many complications, remains a gold standard treatment of low-capacity, poorly compliant, or refractory overactive urinary bladder. In this study, we developed the UROGRAFT, a new bladder acellular matrix-collagen-cellulose (BAM-CC) composite for urinary bladder augmentation. The study presents the step-by-step development process of UROGRAFT, including the selection of an optimal decellularization protocol and cross-linking method to ensure optimal biomaterial properties. Histological and biochemical analyses demonstrated that the combined protocol of Triton X-100 and sodium dodecyl sulfate (SDS) was the most effective, completely removing cellular components while preserving the extracellular matrix (ECM). DNA quantification confirmed a significant reduction in residual genetic material, ensuring a low immunogenic profile. Scanning electron microscopy (SEM) confirmed high porosity and well-preserved collagen fibers. To reduce porosity and permeability, BAM was cross-linked with collagen type I and dialdehyde carboxymethyl cellulose, optimizing scaffold performance. Biocompatibility tests confirmed the absence of toxicity, tissue reactions, acute systemic toxicity, and mutagenic effects. Based on computational modeling, verified by implantation trials, a unique three-armed graft shape resembling lily petals wa

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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