The p38 Mitogen-Activated Protein Kinase Regulates 11β-Hydroxysteroid Dehydrogenase Type 2 (11β-HSD2) Expression in Human Trophoblast Cells through Modulation of 11β-HSD2 Messenger Ribonucleic Acid Stability
Bibliographic record
Abstract
The placental 11beta-hydroxysteroid dehydrogenase type 2 (11beta-HSD2; encoded by the HSD11B2 gene) has emerged as a key player in controlling fetal development, but its regulation is incompletely understood. Here we identified p38 MAPK as an important regulator of placental 11beta-HSD2. We showed that inhibition of p38 MAPK with the pharmacological inhibitor SB202190 led to an approximately 50% reduction in 11beta-HSD2 activity, protein, and mRNA in primary human placental trophoblast cells. Furthermore, the effect of SB202190 was confirmed by the use of two additional p38 inhibitors, SB203580 and SB220025. In addition, SB202190 decreased the half-life of 11beta-HSD2 mRNA without altering the HSD11B2 promoter activity, indicating that p38 MAPK regulates placental 11beta-HSD2 expression through modulation of 11beta-HSD2 mRNA stability. Importantly, small interfering RNA-mediated knockdown of p38alpha caused a 50% reduction in 11beta-HSD2 activity, suggesting that p38alpha is the primary p38 isoform involved. Taken together, these findings suggest a novel pathway controlling placental 11beta-HSD2 expression resulting from the activation of p38 MAPK. Given that p38alpha is abundantly expressed in the human placenta in which its function is largely unknown, our present study also reveals 11beta-HSD2 as an important target through which p38alpha may regulate human placental function and consequently fetal growth and development.
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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) | 0.001 | 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".