The role of glypican-3 in the regulation of body size and cancer
Why this work is in the frame
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Bibliographic record
Abstract
Glypicans are a family of heparan sulfate proteoglycans whose members are bound to the cell surface by a glycosylphosphatidylinositol (GPI) anchor. Loss-of-function mutations in GPC3, one of the six mammalian glypicans, causes the Simson-Golabi-Behmel Syndrome. This is a disorder characterized by pre- and post-natal overgrowth, a broad spectrum of visceral and skeletal abnormalities, and an increased risk for the development of embryonic tumors. GPC3-null mice also display significant overgrowth. We have recently reported that GPC3 acts as a negative regulator of Hedgehog signaling during development, and that the overgrowth caused by the lack of functional GPC3 is due, at least in part, to the hyperactivation of Hedgehog signaling. Here we discuss the rationale that led us to hypothesize that GPC3 could be a negative regulator of Hedgehog signaling, and speculate about the implications of our discovery regarding the role of GPC3 in some cancer types. We also discuss our recent results of experiments that investigated the role of the core protein, the heparan sulfate chains, and the GPI anchor in GPC3 function. Finally, we propose an explanation for the tissue-specific function of GPC3.
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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 it