Construcción de matrices como sustitutos dérmicos: aplicación potencial en la regeneración de piel (MATRIX CONSTRUCTION AS DERMAL SUBSTITUTES: POTENTIAL APPLICATION IN SKIN REGENERATION)
Bibliographic record
Abstract
La pérdida de grandes porciones de piel limita su capacidad de regeneración, haciendo difícil su tratamiento. Mediante la ingeniería de tejidos se han desarrollado sustitutos dérmicos que promueven la regeneración; sin embargo, es necesario hallar un material para el crecimiento de fibroblastos que sea un sustituto dérmico adecuado. En este trabajo se construyeron matrices tridimensionales porosas de colágeno y colágeno-ácido hialurónico evaluando su potencial como sustituto dérmico. Las matrices se entrecruzaron con 1-etil-3-(3-dimetilaminopropil) carbodiimida hidrocloruro. Se evaluó la porosidad, se realizaron pruebas de degradación, evaluación de adherencia celular con fibroblastos humanos y, ensayos de viabilidad y proliferación. Las matrices presentaron poros de 50 µm de diámetro uniformemente distribuidos. Las matrices de colágeno y colágeno-ácido hialurónico (2:8 y 4:6) presentaron una degradación progresiva con pesos similares. Luego de 24 horas en cultivo, los resultados de la prueba de MTT mostraron que los fibroblastos en colágeno proliferaron; mientras que los fibroblastos en colágeno-ácido hialurónico no evidenciaron proliferación. Aunque la estructura porosa y la tasa de degradación de las matrices son similares, las de colágeno brindan mejores condiciones de adhesión y proliferación a los fibroblastos cultivados en comparación con las que tienen ácido hialurónico como adición, convirtiéndose en el mejor andamio para ser empleado como sustituto dérmico entre las matrices evaluadas.Abstract: Wounds can cause loss of skin that limits the skin regeneration, making the treatment more difficult to address. The tissue engineering has developed skin substitutes that promote skin regeneration; however, it is imperative to find materials that allow fibroblast growth in order to find an appropriate skin substitute. The construction of tridimensional porous collagen and collagen hyaluronic acid matrixes crosslinked with 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide hydrochloride is presented in order to evaluate their potential use in skin regeneration therapies. Matrix porosity was evaluated. Degradation tests, human fibroblast adherence, viability and proliferation tests were performed. Matrixes had a uniform distributed porosity with mean diameters of 50 µm. Both collagen and collagen-hyaluronic acid (2:8 and 4:6) matrixes presented a progressive degradation rate with similar weight. After 24 hours under culture, the number of fibroblasts seeded on collagen matrixes were doubled, while the number of fibroblast seeded on collagen-hyaluronic acid matrixes remained similar. Even though porous structure and degradation rate of different types of constructed matrixes in this study are similar, collagen matrixes offer better adhesion and proliferation conditions for seeded fibroblasts in comparison with hyaluronic acid added matrixes, making them the best scaffold to be employed as a dermic substitute among the matrixes compared here.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".