Effective repair of joint cartilage using human pluripotent stem cell-derived tissue
Bibliographic record
Abstract
Adult articular cartilage lacks significant regenerative capacity, and damage to this tissue often leads to progressive joint degeneration (osteoarthritis). We developed strategies to generate articular cartilage from human pluripotent stem cells (hPSCs) as a source of clinically relevant tissues for joint repair 1 . Previously, we demonstrated that these chondrocytes retain cartilage forming potential following subcutaneous implantation in mice. In this report, we evaluated the potential of human embryonic stem cell (hESC)-derived articular cartilage tissue to repair osteochondral defects created in the rat knee. Following implantation, the hESCderived cartilage maintained a proteoglycan and type II collagen-rich matrix, and was well integrated with native rat tissue at the basal and lateral surfaces. The ability to generate cartilage tissue with integrative and reparative properties from an unlimited and robust cell source represents a significant clinical advance for cartilage repair that can be applied to large animal models and ultimately to patient care.
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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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".