Hyperactive mice show elevated D2<sup>High</sup>receptors, a model for schizophrenia: Calcium/calmodulin‐dependent kinase II alpha knockouts
Why this work is in the frame
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Bibliographic record
Abstract
The cerebral frontal cortex of patients who had schizophrenia shows elevated levels of RNA for calcium/calmodulin-dependent protein kinase II beta (CaMKIIbeta). In addition, recent research shows that animal models for schizophrenia, such as amphetamine-sensitized rats, consistently show elevated levels of D2 receptors in their high-affinity state (D2(High)), the major target for antipsychotic medication. The present study was done, therefore, to examine whether an alteration in the levels of CaMKIIbeta could lead to altered levels of D2(High) receptors. We found that the CaMKII inhibitor, KN-93, markedly reduced D2(High) states in rat striatum. In addition, we studied heterozygous CaMKIIalpha knock-out mice that show features analogous to schizophrenia. The striata of these mice revealed a 2.8-fold increase in D2(High) receptors. In frontal cortex of the heterozygous CaMKIIalpha knock-out mice, CaMKIIalpha mRNA levels were reduced by 50%, while CaMKIIbeta mRNA levels were unaltered. In striatum, CaMKIIbeta mRNA levels were increased by 29%, suggesting the presence of a new CaMKIIbeta regulatory pathway not previously described. The elevated levels of CaMKIIbeta mRNA in the striatum suggest that this enzyme may increase D2(High) in animals and possibly in schizophrenia itself.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.002 |
| 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