Calreticulin and cellular adhesion/migration-specific signalling pathways
Bibliographic record
Abstract
Calreticulin is a Ca2+-binding protein of the ER/SR, from where it acts as a chaperone, and affects calcium homeostasis, gene expression and cell adhesion. Cell adhesion to the extracellular matrix can generate transmembrane signals important for cell survival and migration. In a variety of cell types, integrin stimulation by ECM proteins, such as fibronectin, leads to changes in intracellular protein tyrosine phosphorylation. Tyrosine phosphorylation leads to the co-localization of focal adhesion kinase, vinculin and paxillin at focal contacts. Interaction between focal adhesion kinase and paxillin is critical for the activation of signaling cascades involved in cell survival and motility. Fibroblasts either over- or underexpressing calreticulin show differences in their adhesive properties, which are related to the calmodulin/CaMKII pathway. Inhibition of these pathways causes the weekly adhesive calreticulin underexpressing cells to behave like the calreticulin overexpressers, through increased spreading and increased levels of focal adhesion kinase, paxillin and fibronectin. We propose that calreticulin, via its Ca2+-homeostatic effects, may affect fibronectin synthesis and matrix assembly by modulating fibronectin gene expression, and by influencing formation of cellular adhesions, both of which are instrumental in matrix assembly and remodelling. Interestingly, it appears that besides the calmodulin/CaMKII pathway, differential calreticulin expression also modulates the c-src pathway.
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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".