Tissue Engineering of a Genitourinary Tubular Tissue Graft Resistant to Suturing and High Internal Pressures
Why this work is in the frame
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Bibliographic record
Abstract
The aim of this study was to evaluate the possibility of constructing a fully autologous tissue-engineered tubular genitourinary graft (TTGG) and to determine its mechanical and physiological properties. Dermal fibroblasts (DFs) were expanded and cultured in vitro with sodium ascorbate to form fibroblast sheets. The sheets were then wrapped around a tubular support to form a cylinder. After maturation, urothelial cells (UCs) were seeded inside the DF tubes, and the constructs were placed in a bioreactor. The TTGGs were then characterized according to histology, immuno-histochemistry, Western blot, cell viability, resistance to suture, and burst pressure. Results obtained were encouraging on all levels. All layers of the TTGGs had merged, and a pluristratified urothelium coated the luminal surface of the tubes. The burst pressure of non-sutured TTGGs was measured and found to be, on average, three times as resistant as that of porcine urethras. Suturing was accomplished without difficulty. Results have shown that our construct can sustain an entire week of pulsatile stimulation without loss of mechanical or histological integrity. The tissue-engineering technique used to produce this model seems promising for bioengineering a urethra or ureter graft and could open a doorway to new possibilities for their reconstruction.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it