Decidual/placental and first trimester plasma levels of hsa-miR-199a-3p|hsa-miR-199b-3p and hsa-miR-3150b-3p are associated with insulin secretion in pregnancy
Bibliographic record
Abstract
Background/Aims The placenta expresses and releases specific microRNAs (miRNAs) into the maternal circulation that may influence insulin secretion during pregnancy. We hypothesized that specific decidual/placental miRNAs are associated with maternal insulin secretion during pregnancy. Methods In the Genetics of Glucose regulation in Gestation and Growth (Gen3G) prospective cohort, we estimated maternal insulin secretion using the Stumvoll first phase index derived from an oral glucose tolerance test at ~26 weeks of gestation. We quantified miRNAs by small RNA sequencing in placenta (N=435) and first trimester plasma (=422) samples. We used the Limma R package to identify miRNAs associated with the Stumvoll index (P<0.05). We adjusted models for Matsuda index, gravidity, maternal age, newborn sex, gestational age at sampling (first trimester plasma sampling or delivery for placenta samples), and for technical covariates (batch and run for plasma, surrogate variables for placenta). Results Participants had a median [IQR] Stumvoll first phase index of 1112.9 [905.4 - 1284.5] in pregnancy. We identified 30 decidual/placental and 93 first trimester plasma miRNAs nominally associated with the Stumvoll first phase estimate (P<0.05). Lower insulin secretion was associated with lower levels of has-miR-199a-3p|has-miR-199b-3p (b=1.47 [0.10, 2.69] in placenta and b= 4.22 [0.70, 7.67] in plasma), and with higher levels of has-miR-3150b-3p (b= -6.97 [-14.39, 0.40] in placenta and b= -9.19 [-18.38, -0.60] in plasma). Conclusion We identified hsa-miR-199a-3p|hsa-miR-199b-3p and hsa-miR-3150b-3p as differentially expressed in placenta and circulating levels associated with insulin secretion in pregnancy. Hsa-miR-199a-3p may regulate insulin secretion by modulating the expression of E-cadherin and components of the Notch signaling pathway; hsa-miR-3150b-3p may influence glucose-induced insulin secretion through interaction with phospholipase A2.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".