Catalase activity and arsenic sensitivity in acute leukemia
Bibliographic record
Abstract
Arsenic trioxide (As2O3) is currently employed as a treatment for relapsed acute promyelocytic leukemia (APL), where it can induce remission in greater than 90% of patients, but is ineffective in patients with non-APL acute myeloid leukemia (AML). As2O3 induces apoptosis in APL cells through mechanisms dependent and independent of the PML-RARalpha fusion protein. Through PML-RARalpha fusion-independent mechanisms, As2O3 increases H2O2 production via its effects on glutathione and glutathione peroxidase. Catalase is an alternative mechanism to convert H2O2 to water. Therefore, we explored the relationship between catalase activity and As2O3 sensitivity. In AML and APL cell lines, but not primary patient samples, basal catalase levels matched sensitivity to As2O3. However, the chemical inhibition of catalase did not enhance As2O3-induced cell death. Failure of catalase inhibition to sensitise cells to As2O3 was due to a failure of catalase inhibition to increased levels of reactive oxygen species. Therefore, other strategies should be explored to enhance the cytotoxicity of As2O3 in AML.
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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 | 0.001 | 0.000 |
| 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 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 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".