Monitoring of Azathioprine/6-mercaptopurine Treatment in Children With IBD Is Not Necessary
Bibliographic record
Abstract
The efficacy of 6-mercaptopurine (6-MP) and its pro-drug, azathioprine (AZA), in Crohn's disease is clearly documented by meta-analyses of randomized controlled trial data (1). The importance of these steroid-sparing agents in controlling intestinal inflammation and thereby ameliorating growth in pediatric patients with Crohn's disease is now well established (2). Randomized controlled trials examining the role of AZA/6MP in ulcerative colitis are relatively few, but placebo-controlled double-blind withdrawal trial data have demonstrated a benefit in the maintenance of clinical remission (3). What is debated herein is not the efficacy of AZA/6MP in IBD, but the necessity for and utility of metabolizing enzyme assessment and routine metabolite monitoring among patients receiving such immunomodulatory therapy. As depicted in Figure 1, AZA undergoes of series of enzymatic reactions leading to the formation of 6-thioguanine nucleotides (6-TGN), considered the active, but myelotoxic, metabolites. These nucleotides are incorporated into DNA with resultant cytotoxicity. In competing enzymatic pathways, thiopurine methyltransferase (TPMT) catalyzes the formation of 6-methyl-mercaptopurine ribonucleotides (6-MMPR), metabolites that are therapeutically inactive and potentially hepatotoxic.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.004 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".