Reduced angiogenic responses in adult endoglin heterozygous mice
Bibliographic record
Abstract
OBJECTIVE: To determine if angiogenesis is altered in adult Endoglin heterozygous (Eng(+/-)) mice, the animal model for the vascular disorder hereditary hemorrhagic telangiectasia type 1 (HHT1). METHODS: Primary cultures of endothelial cells were generated from Eng(+/-) and Eng(+/+) mice and analyzed for proliferation, migration, and ability to form capillary-like tubes. Endothelial cells derived from umbilical veins of newborns (HUVEC) with an HHT1 genotype were also tested for capillary formation. Two in vivo models of angiogenesis were tested in the Eng(+/-) and Eng(+/+) mice: Matrigel implant-dependent angiogenesis and reperfusion following hindlimb ischemia. RESULTS: The Eng(+/-) endothelial cells displayed significantly reduced proliferation and migration, increased collagen production, and decreased NO synthase expression and vascular endothelial growth factor (VEGF) secretion. They also showed impaired capillary tube formation in vitro, as did the HHT1 HUVEC. These endothelial cell-specific abnormalities were associated with impaired Matrigel-dependent capillary tube formation in vivo and delayed reperfusion following hindlimb ischemia. CONCLUSIONS: Although vascular development is normal in Eng(+/-) mice, angiogenic abnormalities were observed in the adult mice and their isolated endothelial cells. These results suggest that a normal level of endoglin is required for full angiogenic activity.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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".