Bridging the Gap Between Visualization and Reality: Integrating Degradation and Metabolism Data to Elucidate Recombinant Collagen Behavior

Current research methodologies still exhibit certain limitations in elucidating the in vivo behavior of biodegradable protein-based biomaterials, particularly crosslinked recombinant collagen materials. Although traditional isotope and fluorophore labeling techniques allow for highly sensitive visual tracking, the information obtained primarily reflects the migration and distribution of the labeled molecules, making it difficult to accurately reveal the composition and transformation characteristics of degradation products. To address this issue, the present study proposes a comprehensive analytical strategy. Specifically, degradation products are characterized and analyzed through an in vitro simulated degradation system, and these findings are further validated and complemented by in vivo investigations, including histological observations, immunological assessments, and multi-level toxicological studies. Building upon existing visualization and tracing methods, this integrated approach enhances the understanding of the degradation process and provides a potential framework for evaluating the in vivo behavior of biodegradable protein-based materials. Consistent results across multiple experimental approaches demonstrate that fluorescence labeling and isotope tracing effectively capture the early-stage degradation dynamics. Meanwhile, the combined analysis of in vitro degradation products, histological examinations, and toxicological evaluations further elucidates the mid- to late-stage degradation processes and product transformations, thereby offering a more comprehensive understanding of the materials’ in vivo behavior. Furthermore, the study explores the conceptual relationship between degradation and metabolism from a biological perspective, suggesting that, for recombinant collagen-based materials, the degradation process may hold more direct significance in elucidating their biological fate within the body.