S100B Expression Modulates Left Ventricular Remodeling After Myocardial Infarction in Mice
Bibliographic record
Abstract
BACKGROUND: S100B, a 20-kDa, Ca2+-binding dimer, is a putative intrinsic negative regulator of myocardial hypertrophy expressed after myocardial infarction. S100B-overexpressing transgenic (TG) and S100B-knockout (KO) mice have been generated to assess the consequences of S100B expression and altered hypertrophy after infarction. METHODS AND RESULTS: We compared 21 wild-type (WT), 20 TG, and 24 KO mice over 35 days after experimental myocardial infarction with sham-operated controls (n=56). Of those, 4 WT-infarcted mice, 7 TG-infarcted mice, and 1 KO-infarcted mouse and no sham-operated mice died during the observation period. Among survivors, echocardiography, hemodynamic studies, and postmortem examination indicated that the WT and KO groups of infarcted mice mounted a hypertrophic response that was augmented in KO mice. The S100B-overexpressing TG group did not develop hypertrophy but demonstrated increased apoptosis. The postinfarct end-diastolic pressure was lower in KO mice than in WT mice, in accordance with other structural, hemodynamic, and functional parameters, which suggests that abrogation of S100B expression augmented hypertrophy, decreased apoptosis, and was beneficial to preservation of cardiac function within this time frame. CONCLUSIONS: S100B regulates the hypertrophic response and remodeling in the early postinfarct period and represents a potential novel therapeutic target.
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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".