Integrin linked kinase regulates syncytialization of BeWo trophoblast cells†
Bibliographic record
Abstract
During placental development, mononuclear villous cytotrophoblast cells differentiate and fuse with the overlying syncytiotrophoblast. This process requires the dissolution of E-cadherin (CDH1)-containing adherens junctions in cytotrophoblast. Integrin linked kinase (ILK) can downregulate CDH1 through poly (ADP-ribose) polymerase 1 (PARP1) and Snail-1 (SNAI1) during epithelial-mesenchymal transition. ILK is known to be expressed in cytotrophoblast; thus, the role of a potential ILK-PARP1-SNAI1 pathway in aiding trophoblast syncytialization via the downregulation of CDH1 was examined. The spatiotemporal expression of PARP1, SNAI1, and CDH1 were determined in first and early second trimester chorionic villi, term villi, and BeWo cells by immunofluorescence analysis. PARP1 and SNAI1 were highly detectable in villous cytotrophoblast nuclei of human chorionic villi and SNAI1 expression, in particular, also persisted in syncytiotrophoblast. In BeWo cells undergoing syncytialization, PARP1 and SNAI1 increasingly localized to cell nuclei in correlation with decreased CDH1 expression. Using luciferase reporter assays, it was determined that PARP1 and SNAI1 promoter activities were significantly higher in BeWo cells during syncytialization compared to the activities in proliferating cells. Overexpression of wild type or constitutively active ILK also resulted in significantly increased PARP1 and SNAI1 promoter activities while dominant negative ILK overexpression significantly reduced promoter activities. Lastly, siRNA-mediated depletion of ILK expression in BeWo cells undergoing syncytialization resulted in significantly reduced SNAI1 expression and a significant reduction in the incidence of syncytialization correlating with increased CDH1 expression. These results demonstrate that ILK aids trophoblast syncytialization via the downregulation of CDH1, perhaps through an ILK-PARP1-SNAI1 pathway.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 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".