Integrin <i>β</i> 1: A Mechanosignaling Sensor Essential for Connective Tissue Deposition by Fibroblasts
Bibliographic record
Abstract
Significance: There is no effective drug treatment for fibrosis (i.e., pathological scarring). Identifying the fundamental mechanisms responsible for normal and pathological connective tissue deposition is likely to yield novel insights into how to control fibrotic conditions. Recent Advances: An increasing body of evidence suggests a link between mechanical tension and the development of scar tissue. Integrins are the cell surface receptors that mediate interactions between the cell and the surrounding extracellular matrix (ECM). Recent evidence has suggested that, in fibroblasts, the integrin β1–subunit plays an essential role in mechanosignaling and in dermal homeostasis, repair, and fibrosis. The mechanism underlying these activities of integrin β1 appears to involve its ability to (1) mediate activation of latent transforming growth factor beta-1 via ECM contraction and (2) modulate collagen production via a focal adhesion kinase/rac1/nicotinamide adenine dinucleotide phosphate oxidase (NOX)/reactive oxygen species (ROS) pathway. Moreover, the integrin β1–binding protein CCN2, a secreted matricellular protein located within the cellular microenvironment, is required for dermal fibrogenesis. Critical Issues: Mechanical tension is a key feature underlying the development of scar tissue. The mechanosignaling sensor integrin β1 is an essential, central mediator of dermal fibrosis, wound healing, and homeostasis. Future Directions: Drugs targeting the molecular mechanism underlying integrin β1–mediated signaling may represent a novel therapeutic approach for treating fibroproliferative disorders. Clinical trials directly testing this hypothesis are warranted.
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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) | 0.002 | 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 | 0.001 |
| 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".