Angiopoietin-like 4 Enhances the Proliferation and Migration of Tendon Fibroblasts
Bibliographic record
Abstract
PURPOSE: Angiopoietin-like 4 (ANGPTL4) is known to play a variety of roles in the response to exercise, and more recently has been shown to enhance the healing of tendon, a fibrous load-bearing tissue required for efficient movement. The objective of the current study was to further explore the mechanisms of ANGPTL4's effect on tendon cells using a gene array approach. METHODS: Human tendon fibroblasts were treated with recANGPTL4 and their global transcriptome response analyzed after 4 and 24 h. We also conducted functional studies using tendon fibroblasts derived from human subjects, cultured in the presence or absence of applied cyclic stretch and/or siRNA for ANGPTL4, and as confirmation we also used tendon cells from wild type (ANGPTL4 +/+) or knockout (ANGPTL4-/-) mice. RESULTS: The leading functions of ANGPTL4 predicted by the resulting pathway analysis were cell movement and proliferation. The experiments demonstrated that ANGPTL4 significantly enhanced tendon cell proliferation and the cell cycle progression, as well as adhesion and migration. CONCLUSION: Taken together, these findings provide novel molecular insights into the effect of ANGPTL4, a multifunctional protein that regulates the physiological response to exercise, on fundamental tendon cell functions.
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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 | 0.001 | 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 | 0.002 |
| 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".