Localized and Sustained SDF-1 Gene Release Mediated by Fibronectin Films: A Potential Method for Recruiting Stem Cells
Bibliographic record
Abstract
Gene-activated matrix has wide potential utilization in tissue engineering. It may genetically modify cells with plasmid DNA encoding therapeutic genes and allow sustained expression and release of the proteins to surrounding tissues. In this study, we assessed the feasibility of the local gene release from human fibronectin (HFN) substrate and the efficacy of local release of stromal cell-derived factor-1 (SDF-1) gene on c-kit+ cell homing. Cationic polymer polyethylenimine (25kDa PEI) was used as non-viral DNA vector. Gene-activated HFN (GAH) was prepared by mixing PEI/DNA complexes with HFN substrate. The DNA retardation, the complex size, and the DNA release speed from the GAH were studied. The in vitro transfection was optimized by luciferase expression and cell viability assay in the COS7 cell line. Localized gene expression in COS7 cells cultured on the GAH was assessed by LacZ and GFP-N3-SDF-1 marker genes. Ckit+ cell homing was investigated in response to the local in vitro SDF-1 expression from rat mesenchymal stem cells (RMSCs) cultured on GAH. Results showed GAH allows long time-sustained DNA release, localized gene delivery, and high transfection efficiency. Local SDF-1 expression with GAH is a promising method to induce targetable stem cell homing.
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How this classification was reachedexpand
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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".